1. 29 Jan, 2021 18 commits
  2. 28 Jan, 2021 22 commits
    • Linus Torvalds's avatar
      Merge tag 'net-5.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 909b447d
      Linus Torvalds authored
      Pull networking fixes from Jakub Kicinski:
       "Networking fixes including fixes from can, xfrm, wireless,
        wireless-drivers and netfilter trees. Nothing scary, Intel
        WiFi-related fixes seemed most notable to the users.
      
        Current release - regressions:
      
         - dsa: microchip: ksz8795: fix KSZ8794 port map again to program the
           CPU port correctly
      
        Current release - new code bugs:
      
         - iwlwifi: pcie: reschedule in long-running memory reads
      
        Previous releases - regressions:
      
         - iwlwifi: dbg: don't try to overwrite read-only FW data
      
         - iwlwifi: provide gso_type to GSO packets
      
         - octeontx2: make sure the buffer is 128 byte aligned
      
         - tcp: make TCP_USER_TIMEOUT accurate for zero window probes
      
         - xfrm: fix wraparound in xfrm_policy_addr_delta()
      
         - xfrm: fix oops in xfrm_replay_advance_bmp due to a race between
           CPUs in presence of packet reorder
      
         - tcp: fix TLP timer not set when CA_STATE changes from DISORDER to
           OPEN
      
         - wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
      
        Previous releases - always broken:
      
         - igc: fix link speed advertising
      
         - stmmac: configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA
           addressing
      
         - team: protect features update by RCU to avoid deadlock
      
         - xfrm: fix disable_xfrm sysctl when used on xfrm interfaces
           themselves
      
         - fec: fix temporary RMII clock reset on link up
      
         - can: dev: prevent potential information leak in can_fill_info()
      
        Misc:
      
         - mrp: fix bad packing of MRP test packet structures
      
         - uapi: fix big endian definition of ipv6_rpl_sr_hdr
      
         - add David Ahern to IPv4/IPv6 maintainers"
      
      * tag 'net-5.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (86 commits)
        rxrpc: Fix memory leak in rxrpc_lookup_local
        mlxsw: spectrum_span: Do not overwrite policer configuration
        selftests: forwarding: Specify interface when invoking mausezahn
        stmmac: intel: Configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA addressing
        net: usb: cdc_ether: added support for Thales Cinterion PLSx3 modem family.
        ibmvnic: Ensure that CRQ entry read are correctly ordered
        MAINTAINERS: add missing header for bonding
        net: decnet: fix netdev refcount leaking on error path
        net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP
        can: dev: prevent potential information leak in can_fill_info()
        net: fec: Fix temporary RMII clock reset on link up
        net: lapb: Add locking to the lapb module
        team: protect features update by RCU to avoid deadlock
        MAINTAINERS: add David Ahern to IPv4/IPv6 maintainers
        net/mlx5: CT: Fix incorrect removal of tuple_nat_node from nat rhashtable
        net/mlx5e: Revert parameters on errors when changing MTU and LRO state without reset
        net/mlx5e: Revert parameters on errors when changing trust state without reset
        net/mlx5e: Correctly handle changing the number of queues when the interface is down
        net/mlx5e: Fix CT rule + encap slow path offload and deletion
        net/mlx5e: Disable hw-tc-offload when MLX5_CLS_ACT config is disabled
        ...
      909b447d
    • Takeshi Misawa's avatar
      rxrpc: Fix memory leak in rxrpc_lookup_local · b8323f72
      Takeshi Misawa authored
      Commit 9ebeddef ("rxrpc: rxrpc_peer needs to hold a ref on the rxrpc_local record")
      Then release ref in __rxrpc_put_peer and rxrpc_put_peer_locked.
      
      	struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp)
      	-               peer->local = local;
      	+               peer->local = rxrpc_get_local(local);
      
      rxrpc_discard_prealloc also need ref release in discarding.
      
      syzbot report:
      BUG: memory leak
      unreferenced object 0xffff8881080ddc00 (size 256):
        comm "syz-executor339", pid 8462, jiffies 4294942238 (age 12.350s)
        hex dump (first 32 bytes):
          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
          00 00 00 00 0a 00 00 00 00 c0 00 08 81 88 ff ff  ................
        backtrace:
          [<000000002b6e495f>] kmalloc include/linux/slab.h:552 [inline]
          [<000000002b6e495f>] kzalloc include/linux/slab.h:682 [inline]
          [<000000002b6e495f>] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline]
          [<000000002b6e495f>] rxrpc_lookup_local+0x1c1/0x760 net/rxrpc/local_object.c:244
          [<000000006b43a77b>] rxrpc_bind+0x174/0x240 net/rxrpc/af_rxrpc.c:149
          [<00000000fd447a55>] afs_open_socket+0xdb/0x200 fs/afs/rxrpc.c:64
          [<000000007fd8867c>] afs_net_init+0x2b4/0x340 fs/afs/main.c:126
          [<0000000063d80ec1>] ops_init+0x4e/0x190 net/core/net_namespace.c:152
          [<00000000073c5efa>] setup_net+0xde/0x2d0 net/core/net_namespace.c:342
          [<00000000a6744d5b>] copy_net_ns+0x19f/0x3e0 net/core/net_namespace.c:483
          [<0000000017d3aec3>] create_new_namespaces+0x199/0x4f0 kernel/nsproxy.c:110
          [<00000000186271ef>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
          [<000000002de7bac4>] ksys_unshare+0x2fe/0x5c0 kernel/fork.c:2957
          [<00000000349b12ba>] __do_sys_unshare kernel/fork.c:3025 [inline]
          [<00000000349b12ba>] __se_sys_unshare kernel/fork.c:3023 [inline]
          [<00000000349b12ba>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3023
          [<000000006d178ef7>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
          [<00000000637076d4>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      Fixes: 9ebeddef ("rxrpc: rxrpc_peer needs to hold a ref on the rxrpc_local record")
      Signed-off-by: default avatarTakeshi Misawa <jeliantsurux@gmail.com>
      Reported-and-tested-by: syzbot+305326672fed51b205f7@syzkaller.appspotmail.com
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Link: https://lore.kernel.org/r/161183091692.3506637.3206605651502458810.stgit@warthog.procyon.org.ukSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      b8323f72
    • Jakub Kicinski's avatar
      Merge branch 'mlxsw-various-fixes' · 924b171c
      Jakub Kicinski authored
      Ido Schimmel says:
      
      ====================
      mlxsw: Various fixes
      
      Patch #1 fixes wrong invocation of mausezahn in a couple of selftests.
      The tests started failing after Fedora updated their libnet package from
      version 1.1.6 to 1.2.1. With the fix the tests pass regardless of libnet
      version.
      
      Patch #2 fixes an issue in the mirroring to CPU code that results in
      policer configuration being overwritten.
      ====================
      
      Link: https://lore.kernel.org/r/20210128144820.3280295-1-idosch@idosch.orgSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      924b171c
    • Ido Schimmel's avatar
      mlxsw: spectrum_span: Do not overwrite policer configuration · b6f6881a
      Ido Schimmel authored
      The purpose of the delayed work in the SPAN module is to potentially
      update the destination port and various encapsulation parameters of SPAN
      agents that point to a VLAN device or a GRE tap. The destination port
      can change following the insertion of a new route, for example.
      
      SPAN agents that point to a physical port or the CPU port are static and
      never change throughout the lifetime of the SPAN agent. Therefore, skip
      over them in the delayed work.
      
      This fixes an issue where the delayed work overwrites the policer
      that was set on a SPAN agent pointing to the CPU. Modifying the delayed
      work to inherit the original policer configuration is error-prone, as
      the same will be needed for any new parameter.
      
      Fixes: 4039504e ("mlxsw: spectrum_span: Allow setting policer on a SPAN agent")
      Reviewed-by: default avatarPetr Machata <petrm@nvidia.com>
      Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      b6f6881a
    • Danielle Ratson's avatar
      selftests: forwarding: Specify interface when invoking mausezahn · 11df27f7
      Danielle Ratson authored
      Specify the interface through which packets should be transmitted so
      that the test will pass regardless of the libnet version against which
      mausezahn is linked.
      
      Fixes: cab14d10 ("selftests: Add version of router_multipath.sh using nexthop objects")
      Fixes: 3d578d87 ("selftests: forwarding: Test IPv4 weighted nexthops")
      Signed-off-by: default avatarDanielle Ratson <danieller@nvidia.com>
      Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      11df27f7
    • Voon Weifeng's avatar
      stmmac: intel: Configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA addressing · 7cfc4486
      Voon Weifeng authored
      Fix an issue where dump stack is printed and Reset Adapter occurs when
      PSE0 GbE or/and PSE1 GbE is/are enabled. EHL PSE0 GbE and PSE1 GbE use
      32 bits DMA addressing whereas EHL PCH GbE uses 64 bits DMA addressing.
      
      [   25.535095] ------------[ cut here ]------------
      [   25.540276] NETDEV WATCHDOG: enp0s29f2 (intel-eth-pci): transmit queue 2 timed out
      [   25.548749] WARNING: CPU: 2 PID: 0 at net/sched/sch_generic.c:443 dev_watchdog+0x259/0x260
      [   25.558004] Modules linked in: 8021q bnep bluetooth ecryptfs snd_hda_codec_hdmi intel_gpy marvell intel_ishtp_loader intel_ishtp_hid iTCO_wdt mei_hdcp iTCO_vendor_support x86_pkg_temp_thermal kvm_intel dwmac_intel stmmac kvm igb pcs_xpcs irqbypass phylink snd_hda_intel intel_rapl_msr pcspkr dca snd_hda_codec i915 i2c_i801 i2c_smbus libphy intel_ish_ipc snd_hda_core mei_me intel_ishtp mei spi_dw_pci 8250_lpss spi_dw thermal dw_dmac_core parport_pc tpm_crb tpm_tis parport tpm_tis_core tpm intel_pmc_core sch_fq_codel uhid fuse configfs snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_sof_xtensa_dsp snd_sof snd_soc_acpi_intel_match snd_soc_acpi snd_intel_dspcfg ledtrig_audio snd_soc_core snd_compress ac97_bus snd_pcm snd_timer snd soundcore
      [   25.633795] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G     U            5.11.0-rc4-intel-lts-MISMAIL5+ #5
      [   25.644306] Hardware name: Intel Corporation Elkhart Lake Embedded Platform/ElkhartLake LPDDR4x T4 RVP1, BIOS EHLSFWI1.R00.2434.A00.2010231402 10/23/2020
      [   25.659674] RIP: 0010:dev_watchdog+0x259/0x260
      [   25.664650] Code: e8 3b 6b 60 ff eb 98 4c 89 ef c6 05 ec e7 bf 00 01 e8 fb e5 fa ff 89 d9 4c 89 ee 48 c7 c7 78 31 d2 9e 48 89 c2 e8 79 1b 18 00 <0f> 0b e9 77 ff ff ff 0f 1f 44 00 00 48 c7 47 08 00 00 00 00 48 c7
      [   25.685647] RSP: 0018:ffffb7ca80160eb8 EFLAGS: 00010286
      [   25.691498] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000103
      [   25.699483] RDX: 0000000080000103 RSI: 00000000000000f6 RDI: 00000000ffffffff
      [   25.707465] RBP: ffff985709ce0440 R08: 0000000000000000 R09: c0000000ffffefff
      [   25.715455] R10: ffffb7ca80160cf0 R11: ffffb7ca80160ce8 R12: ffff985709ce039c
      [   25.723438] R13: ffff985709ce0000 R14: 0000000000000008 R15: ffff9857068af940
      [   25.731425] FS:  0000000000000000(0000) GS:ffff985864300000(0000) knlGS:0000000000000000
      [   25.740481] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   25.746913] CR2: 00005567f8bb76b8 CR3: 00000001f8e0a000 CR4: 0000000000350ee0
      [   25.754900] Call Trace:
      [   25.757631]  <IRQ>
      [   25.759891]  ? qdisc_put_unlocked+0x30/0x30
      [   25.764565]  ? qdisc_put_unlocked+0x30/0x30
      [   25.769245]  call_timer_fn+0x2e/0x140
      [   25.773346]  run_timer_softirq+0x1f3/0x430
      [   25.777932]  ? __hrtimer_run_queues+0x12c/0x2c0
      [   25.783005]  ? ktime_get+0x3e/0xa0
      [   25.786812]  __do_softirq+0xa6/0x2ef
      [   25.790816]  asm_call_irq_on_stack+0xf/0x20
      [   25.795501]  </IRQ>
      [   25.797852]  do_softirq_own_stack+0x5d/0x80
      [   25.802538]  irq_exit_rcu+0x94/0xb0
      [   25.806475]  sysvec_apic_timer_interrupt+0x42/0xc0
      [   25.811836]  asm_sysvec_apic_timer_interrupt+0x12/0x20
      [   25.817586] RIP: 0010:cpuidle_enter_state+0xd9/0x370
      [   25.823142] Code: 85 c0 0f 8f 0a 02 00 00 31 ff e8 22 d5 7e ff 45 84 ff 74 12 9c 58 f6 c4 02 0f 85 47 02 00 00 31 ff e8 7b a0 84 ff fb 45 85 f6 <0f> 88 ab 00 00 00 49 63 ce 48 2b 2c 24 48 89 c8 48 6b d1 68 48 c1
      [   25.844140] RSP: 0018:ffffb7ca800f7e80 EFLAGS: 00000206
      [   25.849996] RAX: ffff985864300000 RBX: 0000000000000003 RCX: 000000000000001f
      [   25.857975] RDX: 00000005f2028ea8 RSI: ffffffff9ec5907f RDI: ffffffff9ec62a5d
      [   25.865961] RBP: 00000005f2028ea8 R08: 0000000000000000 R09: 0000000000029d00
      [   25.873947] R10: 000000137b0e0508 R11: ffff9858643294e4 R12: ffff9858643336d0
      [   25.881935] R13: ffffffff9ef74b00 R14: 0000000000000003 R15: 0000000000000000
      [   25.889918]  cpuidle_enter+0x29/0x40
      [   25.893922]  do_idle+0x24a/0x290
      [   25.897536]  cpu_startup_entry+0x19/0x20
      [   25.901930]  start_secondary+0x128/0x160
      [   25.906326]  secondary_startup_64_no_verify+0xb0/0xbb
      [   25.911983] ---[ end trace b4c0c8195d0ba61f ]---
      [   25.917193] intel-eth-pci 0000:00:1d.2 enp0s29f2: Reset adapter.
      
      Fixes: 67c08ac4 ("net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID")
      Signed-off-by: default avatarVoon Weifeng <weifeng.voon@intel.com>
      Co-developed-by: default avatarMohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
      Signed-off-by: default avatarMohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
      Link: https://lore.kernel.org/r/20210126100844.30326-1-mohammad.athari.ismail@intel.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      7cfc4486
    • Giacinto Cifelli's avatar
      net: usb: cdc_ether: added support for Thales Cinterion PLSx3 modem family. · dad3a72f
      Giacinto Cifelli authored
      lsusb -v for this device:
      
      Bus 003 Device 007: ID 1e2d:0069
      Device Descriptor:
        bLength                18
        bDescriptorType         1
        bcdUSB               2.00
        bDeviceClass          239 Miscellaneous Device
        bDeviceSubClass         2 ?
        bDeviceProtocol         1 Interface Association
        bMaxPacketSize0        64
        idVendor           0x1e2d
        idProduct          0x0069
        bcdDevice            0.00
        iManufacturer           4 Cinterion Wireless Modules
        iProduct                3 PLSx3
        iSerial                 5 fa3c1419
        bNumConfigurations      1
        Configuration Descriptor:
          bLength                 9
          bDescriptorType         2
          wTotalLength          352
          bNumInterfaces         10
          bConfigurationValue     1
          iConfiguration          2 Cinterion Configuration
          bmAttributes         0xe0
            Self Powered
            Remote Wakeup
          MaxPower              500mA
          Interface Association:
            bLength                 8
            bDescriptorType        11
            bFirstInterface         0
            bInterfaceCount         2
            bFunctionClass          2 Communications
            bFunctionSubClass       2 Abstract (modem)
            bFunctionProtocol       1 AT-commands (v.25ter)
            iFunction               0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        0
            bAlternateSetting       0
            bNumEndpoints           1
            bInterfaceClass         2 Communications
            bInterfaceSubClass      2 Abstract (modem)
            bInterfaceProtocol      1 AT-commands (v.25ter)
            iInterface              0
            CDC Header:
              bcdCDC               1.10
            CDC ACM:
              bmCapabilities       0x02
                line coding and serial state
            CDC Call Management:
              bmCapabilities       0x03
                call management
                use DataInterface
              bDataInterface          1
            CDC Union:
              bMasterInterface        0
              bSlaveInterface         1
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x81  EP 1 IN
              bmAttributes            3
                Transfer Type            Interrupt
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0040  1x 64 bytes
              bInterval               5
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        1
            bAlternateSetting       0
            bNumEndpoints           2
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x82  EP 2 IN
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x01  EP 1 OUT
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
          Interface Association:
            bLength                 8
            bDescriptorType        11
            bFirstInterface         2
            bInterfaceCount         2
            bFunctionClass          2 Communications
            bFunctionSubClass       2 Abstract (modem)
            bFunctionProtocol       1 AT-commands (v.25ter)
            iFunction               0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        2
            bAlternateSetting       0
            bNumEndpoints           1
            bInterfaceClass         2 Communications
            bInterfaceSubClass      2 Abstract (modem)
            bInterfaceProtocol      1 AT-commands (v.25ter)
            iInterface              0
            CDC Header:
              bcdCDC               1.10
            CDC ACM:
              bmCapabilities       0x02
                line coding and serial state
            CDC Call Management:
              bmCapabilities       0x03
                call management
                use DataInterface
              bDataInterface          3
            CDC Union:
              bMasterInterface        2
              bSlaveInterface         3
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x83  EP 3 IN
              bmAttributes            3
                Transfer Type            Interrupt
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0040  1x 64 bytes
              bInterval               5
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        3
            bAlternateSetting       0
            bNumEndpoints           2
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x84  EP 4 IN
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x02  EP 2 OUT
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
          Interface Association:
            bLength                 8
            bDescriptorType        11
            bFirstInterface         4
            bInterfaceCount         2
            bFunctionClass          2 Communications
            bFunctionSubClass       2 Abstract (modem)
            bFunctionProtocol       1 AT-commands (v.25ter)
            iFunction               0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        4
            bAlternateSetting       0
            bNumEndpoints           1
            bInterfaceClass         2 Communications
            bInterfaceSubClass      2 Abstract (modem)
            bInterfaceProtocol      1 AT-commands (v.25ter)
            iInterface              0
            CDC Header:
              bcdCDC               1.10
            CDC ACM:
              bmCapabilities       0x02
                line coding and serial state
            CDC Call Management:
              bmCapabilities       0x03
                call management
                use DataInterface
              bDataInterface          5
            CDC Union:
              bMasterInterface        4
              bSlaveInterface         5
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x85  EP 5 IN
              bmAttributes            3
                Transfer Type            Interrupt
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0040  1x 64 bytes
              bInterval               5
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        5
            bAlternateSetting       0
            bNumEndpoints           2
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x86  EP 6 IN
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x03  EP 3 OUT
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
          Interface Association:
            bLength                 8
            bDescriptorType        11
            bFirstInterface         6
            bInterfaceCount         2
            bFunctionClass          2 Communications
            bFunctionSubClass       2 Abstract (modem)
            bFunctionProtocol       1 AT-commands (v.25ter)
            iFunction               0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        6
            bAlternateSetting       0
            bNumEndpoints           1
            bInterfaceClass         2 Communications
            bInterfaceSubClass      2 Abstract (modem)
            bInterfaceProtocol      1 AT-commands (v.25ter)
            iInterface              0
            CDC Header:
              bcdCDC               1.10
            CDC ACM:
              bmCapabilities       0x02
                line coding and serial state
            CDC Call Management:
              bmCapabilities       0x03
                call management
                use DataInterface
              bDataInterface          7
            CDC Union:
              bMasterInterface        6
              bSlaveInterface         7
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x87  EP 7 IN
              bmAttributes            3
                Transfer Type            Interrupt
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0040  1x 64 bytes
              bInterval               5
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        7
            bAlternateSetting       0
            bNumEndpoints           2
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x88  EP 8 IN
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x04  EP 4 OUT
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
          Interface Association:
            bLength                 8
            bDescriptorType        11
            bFirstInterface         8
            bInterfaceCount         2
            bFunctionClass          2 Communications
            bFunctionSubClass       0
            bFunctionProtocol       0
            iFunction               0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        8
            bAlternateSetting       0
            bNumEndpoints           1
            bInterfaceClass         2 Communications
            bInterfaceSubClass      6 Ethernet Networking
            bInterfaceProtocol      0
            iInterface              0
            CDC Header:
              bcdCDC               1.10
            CDC Ethernet:
              iMacAddress                      1 00A0C6C14190
              bmEthernetStatistics    0x00000000
              wMaxSegmentSize              16384
              wNumberMCFilters            0x0001
              bNumberPowerFilters              0
            CDC Union:
              bMasterInterface        8
              bSlaveInterface         9
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x89  EP 9 IN
              bmAttributes            3
                Transfer Type            Interrupt
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0040  1x 64 bytes
              bInterval               5
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        9
            bAlternateSetting       0
            bNumEndpoints           0
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
          Interface Descriptor:
            bLength                 9
            bDescriptorType         4
            bInterfaceNumber        9
            bAlternateSetting       1
            bNumEndpoints           2
            bInterfaceClass        10 CDC Data
            bInterfaceSubClass      0 Unused
            bInterfaceProtocol      0
            iInterface              0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x8a  EP 10 IN
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
            Endpoint Descriptor:
              bLength                 7
              bDescriptorType         5
              bEndpointAddress     0x05  EP 5 OUT
              bmAttributes            2
                Transfer Type            Bulk
                Synch Type               None
                Usage Type               Data
              wMaxPacketSize     0x0200  1x 512 bytes
              bInterval               0
      Device Qualifier (for other device speed):
        bLength                10
        bDescriptorType         6
        bcdUSB               2.00
        bDeviceClass          239 Miscellaneous Device
        bDeviceSubClass         2 ?
        bDeviceProtocol         1 Interface Association
        bMaxPacketSize0        64
        bNumConfigurations      1
      Device Status:     0x0000
        (Bus Powered)
      Signed-off-by: default avatarGiacinto Cifelli <gciofono@gmail.com>
      Link: https://lore.kernel.org/r/20210126044245.8455-1-gciofono@gmail.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      dad3a72f
    • Linus Torvalds's avatar
      Merge tag 'locking-urgent-2021-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c64396cc
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "A set of PI futex fixes:
      
         - Address a longstanding issue where the user space part of the PI
           futex is not writeable. The kernel returns with inconsistent state
           which can in the worst case result in a UAF of a tasks kernel
           stack.
      
           The solution is to establish consistent kernel state which makes
           future operations on the futex fail because user space and kernel
           space state are inconsistent. Not a problem as PI futexes
           fundamentaly require a functional RW mapping and if user space
           pulls the rug under it, then it can keep the pieces it asked for.
      
         - Address an issue where the return value is incorrect in case that
           the futex was acquired after a timeout/signal made the waiter drop
           out of the rtmutex wait.
      
           In one of the corner cases the kernel returned an error code
           despite having successfully acquired the futex"
      
      * tag 'locking-urgent-2021-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        futex: Handle faults correctly for PI futexes
        futex: Simplify fixup_pi_state_owner()
        futex: Use pi_state_update_owner() in put_pi_state()
        rtmutex: Remove unused argument from rt_mutex_proxy_unlock()
        futex: Provide and use pi_state_update_owner()
        futex: Replace pointless printk in fixup_owner()
        futex: Ensure the correct return value from futex_lock_pi()
      c64396cc
    • Pavel Begunkov's avatar
      io_uring: fix sqo ownership false positive warning · 70b2c60d
      Pavel Begunkov authored
      WARNING: CPU: 0 PID: 21359 at fs/io_uring.c:9042
          io_uring_cancel_task_requests+0xe55/0x10c0 fs/io_uring.c:9042
      Call Trace:
       io_uring_flush+0x47b/0x6e0 fs/io_uring.c:9227
       filp_close+0xb4/0x170 fs/open.c:1295
       close_files fs/file.c:403 [inline]
       put_files_struct fs/file.c:418 [inline]
       put_files_struct+0x1cc/0x350 fs/file.c:415
       exit_files+0x7e/0xa0 fs/file.c:435
       do_exit+0xc22/0x2ae0 kernel/exit.c:820
       do_group_exit+0x125/0x310 kernel/exit.c:922
       get_signal+0x427/0x20f0 kernel/signal.c:2773
       arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
       handle_signal_work kernel/entry/common.c:147 [inline]
       exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
       exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
       __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
       syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
       entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      Now io_uring_cancel_task_requests() can be called not through file
      notes but directly, remove a WARN_ONCE() there that give us false
      positives. That check is not very important and we catch it in other
      places.
      
      Fixes: 84965ff8 ("io_uring: if we see flush on exit, cancel related tasks")
      Cc: stable@vger.kernel.org # 5.9+
      Reported-by: syzbot+3e3d9bd0c6ce9efbc3ef@syzkaller.appspotmail.com
      Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      70b2c60d
    • Pavel Begunkov's avatar
      io_uring: fix list corruption for splice file_get · f609cbb8
      Pavel Begunkov authored
      kernel BUG at lib/list_debug.c:29!
      Call Trace:
       __list_add include/linux/list.h:67 [inline]
       list_add include/linux/list.h:86 [inline]
       io_file_get+0x8cc/0xdb0 fs/io_uring.c:6466
       __io_splice_prep+0x1bc/0x530 fs/io_uring.c:3866
       io_splice_prep fs/io_uring.c:3920 [inline]
       io_req_prep+0x3546/0x4e80 fs/io_uring.c:6081
       io_queue_sqe+0x609/0x10d0 fs/io_uring.c:6628
       io_submit_sqe fs/io_uring.c:6705 [inline]
       io_submit_sqes+0x1495/0x2720 fs/io_uring.c:6953
       __do_sys_io_uring_enter+0x107d/0x1f30 fs/io_uring.c:9353
       do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
       entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      io_file_get() may be called from splice, and so REQ_F_INFLIGHT may
      already be set.
      
      Fixes: 02a13674 ("io_uring: account io_uring internal files as REQ_F_INFLIGHT")
      Cc: stable@vger.kernel.org # 5.9+
      Reported-by: syzbot+6879187cf57845801267@syzkaller.appspotmail.com
      Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      f609cbb8
    • Arnd Bergmann's avatar
      amdgpu: fix clang build warning · 00190bc0
      Arnd Bergmann authored
      clang warns about the -mhard-float command line arguments
      on architectures that do not support this:
      
      clang: error: argument unused during compilation: '-mhard-float' [-Werror,-Wunused-command-line-argument]
      
      Move this into the gcc-specific arguments.
      
      Fixes: e77165bf ("drm/amd/display: Add DCN3 blocks to Makefile")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      00190bc0
    • Alex Deucher's avatar
      Revert "drm/amdgpu/swsmu: drop set_fan_speed_percent (v2)" · a119f87b
      Alex Deucher authored
      On some boards the rpm interface apparently does not work at all
      leading to the fan not spinning or spinning at strange speeds.
      Revert this for now to fix 5.10, 5.11.  The follow on patch
      fixes this properly for 5.12.
      
      This reverts commit 8d6e65ad.
      
      Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1408Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      Cc: stable@vger.kernel.org
      a119f87b
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · e5ff2cb9
      Linus Torvalds authored
      Pull xen fixes from Juergen Gross:
      
       - A fix for a regression introduced in 5.11 resulting in Xen dom0
         having problems to correctly initialize Xenstore.
      
       - A fix for avoiding WARN splats when booting as Xen dom0 with
         CONFIG_AMD_MEM_ENCRYPT enabled due to a missing trap handler for the
         #VC exception (even if the handler should never be called).
      
       - A fix for the Xen bklfront driver adapting to the correct but
         unexpected behavior of new qemu.
      
      * tag 'for-linus-5.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        x86/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled
        xen: Fix XenStore initialisation for XS_LOCAL
        xen-blkfront: allow discard-* nodes to be optional
      e5ff2cb9
    • Linus Torvalds's avatar
      Merge tag 'asm-generic-fixes-v5.11' of... · 228345bf
      Linus Torvalds authored
      Merge tag 'asm-generic-fixes-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
      
      Pull ia64 fixes from Arnd Bergmann:
       "asm-generic/ia64 fixes, and mark as orphaned
      
        Commit 2b49ddce ("ia64: convert to legacy_timer_tick") from my
        timer series I merged through the asm-generic tree caused a regression
        on all ia64 machines, as bisected by Adrian Glaubitz.
      
        Tony Luck is no longer really working on ia64, so instead of merging
        the fix through his tree, we ended up deciding that I'd merge the fix
        myself along a patch to mark the architecture as Orphaned and a
        compile time warning fix I made while working on the regression"
      
      [ HPE no longer accepts orders for new Itanium hardware, and Intel
        stopped accepting orders a year ago. While intel is still officially
        shipping chips until July 29, 2021, it's unlikely that any such orders
        actually exist.
      
        It's dead, Jim.
                           - Linus ]
      
      * tag 'asm-generic-fixes-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
        ia64: Mark architecture as orphaned
        ia64: fix xchg() warning
        ia64: fix timer cleanup regression
      228345bf
    • Linus Torvalds's avatar
      Merge tag 'arm-soc-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 7485e08e
      Linus Torvalds authored
      Pull ARM SoC fixes from Arnd Bergmann:
       "These are the current arm-soc bug fixes for linux-5.11. I already
        merged a larger set that just came in during the past three days but
        has not had much exposure in linux-next, but this is the subset I
        merged last week.
      
        Most of these are for the NXP i.MX platform (descriptions from their
        pull request):
      
         - Fix pcf2127 reset for imx7d-flex-concentrator board.
         - Fix i.MX6 suspend with Thumb-2 kernel.
         - Fix ethernet-phy address issue on imx6qdl-sr-som board.
         - Fix GPIO3 `gpio-ranges` on i.MX8MP.
         - Select SOC_BUS for IMX_SCU driver to fix build issue.
         - Fix backlight pwm on imx6qdl-kontron-samx6i which is lost from
           #pwm-cells conversion.
         - Fix duplicated bus node name for i.MX8MN SoC.
         - Fix reset register offset on LS1028A SoC.
         - Rename MMC node aliases for imx6q-tbs2910 to keep the MMC device
           index consistent with previous kernel version.
         - Selecting ARM_GIC_V3 on non-CP15 processors to fix one build
           failure with i.MX8M SoC driver.
         - Fix typos with status property on imx6qdl-kontron-samx6i board.
         - Fix duplicated regulator-name on imx6qdl-gw52xx board.
      
        Aside from i.MX, the bugfixes are all over the place:
      
         - Coccinelle found a refcount imbalance on integrator
         - defconfig fix for TI K3
         - A boot regression fix for ST ux500
         - A code preemption fix for the optee driver
         - USB DMA regression on Broadcom Stingray
         - A bogus boot time warning fix for at91 code"
      
      * tag 'arm-soc-fixes-v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
        MAINTAINERS: Include bcm2835 subsequents into search
        arm64: dts: broadcom: Fix USB DMA address translation for Stingray
        drivers: soc: atmel: add null entry at the end of at91_soc_allowed_list[]
        drivers: soc: atmel: Avoid calling at91_soc_init on non AT91 SoCs
        tee: optee: replace might_sleep with cond_resched
        firmware: imx: select SOC_BUS to fix firmware build
        arm64: dts: imx8mp: Correct the gpio ranges of gpio3
        ARM: dts: imx6qdl-sr-som: fix some cubox-i platforms
        ARM: imx: build suspend-imx6.S with arm instruction set
        ARM: dts: imx7d-flex-concentrator: fix pcf2127 reset
        ARM: dts: ux500: Reserve memory carveouts
        arm64: defconfig: Drop unused K3 SoC specific options
        bus: arm-integrator-lm: Add of_node_put() before return statement
        ARM: dts: imx6qdl-gw52xx: fix duplicate regulator naming
        ARM: dts: imx6qdl-kontron-samx6i: fix i2c_lcd/cam default status
        ARM: imx: fix imx8m dependencies
        ARM: dts: tbs2910: rename MMC node aliases
        arm64: dts: ls1028a: fix the offset of the reset register
        arm64: dts: imx8mn: Fix duplicate node name
        ARM: dts: imx6qdl-kontron-samx6i: fix pwms for lcd-backlight
      7485e08e
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · b0dfa64d
      Linus Torvalds authored
      Pull rdma fixes from Jason Gunthorpe:
       "Several recent regressions and some bug fixes:
      
         - Typo corrupting the max_recv_sge for cxgb4
      
         - Regression from re-using kernel enums as a HW AbI in vmw_pvrdma
      
         - Sleeping inside a spinlock in hns
      
         - Revert the attempt to fix devlink deadlocks as the fix is more buggy
      
         - Typo in sysfs_emit_at conversions
      
         - Revert the removal of VLAN support in rxe"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
        Revert "RDMA/rxe: Remove VLAN code leftovers from RXE"
        RDMA/usnic: Fix misuse of sysfs_emit_at
        Revert "RDMA/mlx5: Fix devlink deadlock on net namespace deletion"
        RDMA/hns: Use mutex instead of spinlock for ida allocation
        RDMA/vmw_pvrdma: Fix network_hdr_type reported in WC
        RDMA/cxgb4: Fix the reported max_recv_sge value
      b0dfa64d
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid · 25221c99
      Linus Torvalds authored
      Pull HID fixes from Jiri Kosina:
      
       - NULL pointer dereference regression fix for Wacom driver (Jason
         Gerecke)
      
       - functional regression fix for pam handling on some Elan and Synaptics
         touchpads (Kai-Heng Feng)
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
        HID: wacom: Correct NULL dereference on AES pen proximity
        HID: multitouch: Apply MT_QUIRK_CONFIDENCE quirk for multi-input devices
      25221c99
    • Linus Torvalds's avatar
      Merge tag 'media/v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · fc856f1d
      Linus Torvalds authored
      Pull media fixes from Mauro Carvalho Chehab:
      
       - a V4L2 core regression at videobuf2 when checking for single-plane
         dmabuf
      
       - a change at uAPI header v4l2-subdev.h, fixing a breakage as BIT()
         macro is not available in userspace
      
       - fix some regressions at RC core due to the usage of microseconds
         everywhere on it
      
       - a fix for a race condition at RC core
      
       - a rename on a newly-introduced kAPI symbol (v4l2_get_link_rate),
         currently used only by a single driver
      
       - Regression fixes for rcar-vin, cedrus, ite-cir, hantro, css, venus,
         and cec drivers.
      
      * tag 'media/v5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        media: hantro: Fix reset_raw_fmt initialization
        media: cec: add stm32 driver
        media: cedrus: Fix H264 decoding
        media: v4l2-subdev.h: BIT() is not available in userspace
        media: Revert "media: videobuf2: Fix length check for single plane dmabuf queueing"
        media: rc: ite-cir: fix min_timeout calculation
        media: venus: core: Fix platform driver shutdown
        media: rc: fix timeout handling after switch to microsecond durations
        media: v4l: common: Fix naming of v4l2_get_link_rate
        media: rcar-vin: fix return, use ret instead of zero
        media: ccs: Get static data version minor correctly
        media: ccs-pll: Fix link frequency for C-PHY
        media: rc: ensure that uevent can be read directly after rc device register
      fc856f1d
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · a467b073
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "A handful of clk driver fixes:
      
         - Build fix for CONFIG_PM=n in the mmp2 driver
      
         - Kconfig warning for unmet dependencies in the i.MX driver
      
         - Make the camera AHB clk always be enabled on qcom sc7180
      
         - Use rate round down semantics for qcom sm8250 SD clks"
      
      * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: mmp2: fix build without CONFIG_PM
        clk: qcom: gcc-sm250: Use floor ops for sdcc clks
        clk: imx: fix Kconfig warning for i.MX SCU clk
        clk: qcom: gcc-sc7180: Mark the camera abh clock always ON
      a467b073
    • Linus Torvalds's avatar
      Merge tag 'sound-5.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · be4a3385
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Although the incoming fixes haven't settled down yet, all changes here
        are small and mostly device-specific fixes, so nothing look worrisome.
      
         - Yet another USB-audio regression fixes
      
         - HD-audio ID fix and device-specific quirks
      
         - SOF Intel / SoundWire fixes including topology
      
         - ASoC Qualcomm and Mediatek fixes"
      
      * tag 'sound-5.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (24 commits)
        ALSA: hda/via: Apply the workaround generically for Clevo machines
        ASoC: Intel: sof_sdw: set proper flags for Dell TGL-H SKU 0A5E
        ASoC: qcom: lpass: Fix out-of-bounds DAI ID lookup
        ASoC: mediatek: mt8192-mt6359: add format constraints for RT5682
        ASoC: ak4458: correct reset polarity
        ASoC: SOF: SND_INTEL_DSP_CONFIG dependency
        ASoC: SOF: Intel: soundwire: fix select/depend unmet dependencies
        ALSA: hda: intel-dsp-config: add PCI id for TGL-H
        ALSA: usb-audio: workaround for iface reset issue
        ALSA: pcm: One more dependency for hw constraints
        ALSA: hda/realtek: Enable headset of ASUS B1400CEPE with ALC256
        ASoC: Intel: Skylake: Zero snd_ctl_elem_value
        ASoC: Intel: Skylake: skl-topology: Fix OOPs ib skl_tplg_complete
        ASoC: qcom: Fix number of HDMI RDMA channels on sc7180
        ASoC: mediatek: mt8183-da7219: ignore TDM DAI link by default
        ASoC: mediatek: mt8183-mt6358: ignore TDM DAI link by default
        ASoC: topology: Properly unregister DAI on removal
        ASoC: topology: Fix memory corruption in soc_tplg_denum_create_values()
        ASoC: qcom: lpass-ipq806x: fix bitwidth regmap field
        ASoC: AMD Renoir - refine DMI entries for some Lenovo products
        ...
      be4a3385
    • Wang Hai's avatar
      Revert "mm/slub: fix a memory leak in sysfs_slab_add()" · 757fed1d
      Wang Hai authored
      This reverts commit dde3c6b7.
      
      syzbot report a double-free bug. The following case can cause this bug.
      
       - mm/slab_common.c: create_cache(): if the __kmem_cache_create() fails,
         it does:
      
      	out_free_cache:
      		kmem_cache_free(kmem_cache, s);
      
       - but __kmem_cache_create() - at least for slub() - will have done
      
      	sysfs_slab_add(s)
      		-> sysfs_create_group() .. fails ..
      		-> kobject_del(&s->kobj); .. which frees s ...
      
      We can't remove the kmem_cache_free() in create_cache(), because other
      error cases of __kmem_cache_create() do not free this.
      
      So, revert the commit dde3c6b7 ("mm/slub: fix a memory leak in
      sysfs_slab_add()") to fix this.
      
      Reported-by: syzbot+d0bd96b4696c1ef67991@syzkaller.appspotmail.com
      Fixes: dde3c6b7 ("mm/slub: fix a memory leak in sysfs_slab_add()")
      Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
      Signed-off-by: default avatarWang Hai <wanghai38@huawei.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      757fed1d
    • Nadav Amit's avatar
      iommu/vt-d: Do not use flush-queue when caching-mode is on · 29b32839
      Nadav Amit authored
      When an Intel IOMMU is virtualized, and a physical device is
      passed-through to the VM, changes of the virtual IOMMU need to be
      propagated to the physical IOMMU. The hypervisor therefore needs to
      monitor PTE mappings in the IOMMU page-tables. Intel specifications
      provide "caching-mode" capability that a virtual IOMMU uses to report
      that the IOMMU is virtualized and a TLB flush is needed after mapping to
      allow the hypervisor to propagate virtual IOMMU mappings to the physical
      IOMMU. To the best of my knowledge no real physical IOMMU reports
      "caching-mode" as turned on.
      
      Synchronizing the virtual and the physical IOMMU tables is expensive if
      the hypervisor is unaware which PTEs have changed, as the hypervisor is
      required to walk all the virtualized tables and look for changes.
      Consequently, domain flushes are much more expensive than page-specific
      flushes on virtualized IOMMUs with passthrough devices. The kernel
      therefore exploited the "caching-mode" indication to avoid domain
      flushing and use page-specific flushing in virtualized environments. See
      commit 78d5f0f5 ("intel-iommu: Avoid global flushes with caching
      mode.")
      
      This behavior changed after commit 13cf0174 ("iommu/vt-d: Make use
      of iova deferred flushing"). Now, when batched TLB flushing is used (the
      default), full TLB domain flushes are performed frequently, requiring
      the hypervisor to perform expensive synchronization between the virtual
      TLB and the physical one.
      
      Getting batched TLB flushes to use page-specific invalidations again in
      such circumstances is not easy, since the TLB invalidation scheme
      assumes that "full" domain TLB flushes are performed for scalability.
      
      Disable batched TLB flushes when caching-mode is on, as the performance
      benefit from using batched TLB invalidations is likely to be much
      smaller than the overhead of the virtual-to-physical IOMMU page-tables
      synchronization.
      
      Fixes: 13cf0174 ("iommu/vt-d: Make use of iova deferred flushing")
      Signed-off-by: default avatarNadav Amit <namit@vmware.com>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Lu Baolu <baolu.lu@linux.intel.com>
      Cc: Joerg Roedel <joro@8bytes.org>
      Cc: Will Deacon <will@kernel.org>
      Cc: stable@vger.kernel.org
      Acked-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
      Link: https://lore.kernel.org/r/20210127175317.1600473-1-namit@vmware.comSigned-off-by: default avatarJoerg Roedel <jroedel@suse.de>
      29b32839