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  1. 04 Oct, 2018 5 commits
  3. 03 Oct, 2018 16 commits
  5. 02 Oct, 2018 19 commits
    • David S. Miller's avatar
      Merge tag 'wireless-drivers-for-davem-2018-10-01' of... · 11bde899
      David S. Miller authored 
      Merge tag 'wireless-drivers-for-davem-2018-10-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.19

First, and also hopefully the last, set of fixes for 4.19. All small
but still important fixes

mt76x0

* fix a bug when a virtual interface is removed multiple times

b43

* fix DMA error related regression with proprietary firmware

iwlwifi

* fix an oops which was a regression in v4.19-rc1
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      11bde899
    • Eric Dumazet's avatar
      rtnl: limit IFLA_NUM_TX_QUEUES and IFLA_NUM_RX_QUEUES to 4096 · 0e1d6eca
      Eric Dumazet authored 
      We have an impressive number of syzkaller bugs that are linked
to the fact that syzbot was able to create a networking device
with millions of TX (or RX) queues.

Let's limit the number of RX/TX queues to 4096, this really should
cover all known cases.

A separate patch will add various cond_resched() in the loops
handling sysfs entries at device creation and dismantle.

Tested:

lpaa6:~# ip link add gre-4097 numtxqueues 4097 numrxqueues 4097 type ip6gretap
RTNETLINK answers: Invalid argument

lpaa6:~# time ip link add gre-4096 numtxqueues 4096 numrxqueues 4096 type ip6gretap

real	0m0.180s
user	0m0.000s
sys	0m0.107s

Fixes: 76ff5cc9 ("rtnl: allow to specify number of rx and tx queues on device creation")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0e1d6eca
    • Mahesh Bandewar's avatar
      bonding: fix warning message · 0f3b914c
      Mahesh Bandewar authored 
      RX queue config for bonding master could be different from its slave
device(s). With the commit 6a9e461f ("bonding: pass link-local
packets to bonding master also."), the packet is reinjected into stack
with skb->dev as bonding master. This potentially triggers the
message:

   "bondX received packet on queue Y, but number of RX queues is Z"

whenever the queue that packet is received on is higher than the
numrxqueues on bonding master (Y > Z).

Fixes: 6a9e461f ("bonding: pass link-local packets to bonding master also.")
Reported-by: default avatarJohn Sperbeck <jsperbeck@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarMahesh Bandewar <maheshb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0f3b914c
    • Eric Dumazet's avatar
      inet: make sure to grab rcu_read_lock before using ireq->ireq_opt · 2ab2ddd3
      Eric Dumazet authored 
      Timer handlers do not imply rcu_read_lock(), so my recent fix
triggered a LOCKDEP warning when SYNACK is retransmit.

Lets add rcu_read_lock()/rcu_read_unlock() pairs around ireq->ireq_opt
usages instead of guessing what is done by callers, since it is
not worth the pain.

Get rid of ireq_opt_deref() helper since it hides the logic
without real benefit, since it is now a standard rcu_dereference().

Fixes: 1ad98e9d ("tcp/dccp: fix lockdep issue when SYN is backlogged")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2ab2ddd3
    • Jakub Kicinski's avatar
      nfp: avoid soft lockups under control message storm · ff58e2df
      Jakub Kicinski authored 
      When FW floods the driver with control messages try to exit the cmsg
processing loop every now and then to avoid soft lockups.  Cmsg
processing is generally very lightweight so 512 seems like a reasonable
budget, which should not be exceeded under normal conditions.

Fixes: 77ece8d5 ("nfp: add control vNIC datapath")
Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: default avatarSimon Horman <simon.horman@netronome.com>
Tested-by: default avatarPieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ff58e2df
    • Maciej W. Rozycki's avatar
      declance: Fix continuation with the adapter identification message · fe3a83af
      Maciej W. Rozycki authored 
      Fix a commit 4bcc595c ("printk: reinstate KERN_CONT for printing
continuation lines") regression with the `declance' driver, which caused
the adapter identification message to be split between two lines, e.g.:

declance.c: v0.011 by Linux MIPS DECstation task force
tc6: PMAD-AA
, addr = 08:00:2b:1b:2a:6a, irq = 14
tc6: registered as eth0.

Address that properly, by printing identification with a single call,
making the messages now look like:

declance.c: v0.011 by Linux MIPS DECstation task force
tc6: PMAD-AA, addr = 08:00:2b:1b:2a:6a, irq = 14
tc6: registered as eth0.
Signed-off-by: default avatarMaciej W. Rozycki <macro@linux-mips.org>
Fixes: 4bcc595c ("printk: reinstate KERN_CONT for printing continuation lines")
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fe3a83af
    • Rickard x Andersson's avatar
      net: fec: fix rare tx timeout · 657ade07
      Rickard x Andersson authored 
      During certain heavy network loads TX could time out
with TX ring dump.
TX is sometimes never restarted after reaching
"tx_stop_threshold" because function "fec_enet_tx_queue"
only tests the first queue.

In addition the TX timeout callback function failed to
recover because it also operated only on the first queue.
Signed-off-by: default avatarRickard x Andersson <rickaran@axis.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      657ade07
    • Greg Kroah-Hartman's avatar
      Merge tag 'fbdev-v4.19-rc7' of https://github.com/bzolnier/linux · 1d2ba7fe
      Greg Kroah-Hartman authored 
      Bartlomiej writes:
  "fbdev fixes for v4.19-rc7:

   - fix OMAPFB_MEMORY_READ ioctl to not leak kernel memory in omapfb driver
     (Tomi Valkeinen)

   - add missing prepare/unprepare clock operations in pxa168fb driver
     (Lubomir Rintel)

   - add nobgrt option in efifb driver to disable ACPI BGRT logo restore
     (Hans de Goede)

   - fix spelling mistake in fall-through annotation in stifb driver
     (Gustavo A. R. Silva)

   - fix URL for uvesafb repository in the documentation (Adam Jackson)"

* tag 'fbdev-v4.19-rc7' of https://github.com/bzolnier/linux:
  video/fbdev/stifb: Fix spelling mistake in fall-through annotation
  uvesafb: Fix URLs in the documentation
  efifb: BGRT: Add nobgrt option
  fbdev/omapfb: fix omapfb_memory_read infoleak
  pxa168fb: prepare the clock
      1d2ba7fe
    • Greg Kroah-Hartman's avatar
      Merge tag 'mmc-v4.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc · 5e0b19ac
      Greg Kroah-Hartman authored 
      Ulf writes:
  "MMC core:
    - Fixup conversion of debounce time to/from ms/us

   MMC host:
    - sdhi: Fixup whitelisting for Gen3 types"

* tag 'mmc-v4.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: slot-gpio: Fix debounce time to use miliseconds again
  mmc: core: Fix debounce time to use microseconds
  mmc: sdhi: sys_dmac: check for all Gen3 types when whitelisting
      5e0b19ac
    • Heiner Kallweit's avatar
      r8169: fix network stalls due to missing bit TXCFG_AUTO_FIFO · ad5f97fa
      Heiner Kallweit authored 
      Some of the chip-specific hw_start functions set bit TXCFG_AUTO_FIFO
in register TxConfig. The original patch changed the order of some
calls resulting in these changes being overwritten by
rtl_set_tx_config_registers() in rtl_hw_start(). This eventually
resulted in network stalls especially under high load.

Analyzing the chip-specific hw_start functions all chip version from
34, with the exception of version 39, need this bit set.
This patch moves setting this bit to rtl_set_tx_config_registers().

Fixes: 4fd48c4a ("r8169: move common initializations to tp->hw_start")
Reported-by: default avatarOrtwin Glück <odi@odi.ch>
Reported-by: default avatarDavid Arendt <admin@prnet.org>
Root-caused-by: default avatarMaciej S. Szmigiero <mail@maciej.szmigiero.name>
Tested-by: default avatarTony Atkinson <tatkinson@linux.com>
Tested-by: default avatarDavid Arendt <admin@prnet.org>
Tested-by: default avatarOrtwin Glück <odi@odi.ch>
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ad5f97fa
    • David S. Miller's avatar
      Merge branch 'tun-races' · 2547496e
      David S. Miller authored 
      Eric Dumazet says:

====================
tun: address two syzbot reports

Small changes addressing races discovered by syzbot.

First patch is a cleanup.
Second patch moves a mutex init sooner.
Third patch makes sure each tfile gets its own napi enable flags.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2547496e
    • Eric Dumazet's avatar
      tun: napi flags belong to tfile · af3fb24e
      Eric Dumazet authored 
      Since tun->flags might be shared by multiple tfile structures,
it is better to make sure tun_get_user() is using the flags
for the current tfile.

Presence of the READ_ONCE() in tun_napi_frags_enabled() gave a hint
of what could happen, but we need something stronger to please
syzbot.

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 13647 Comm: syz-executor5 Not tainted 4.19.0-rc5+ #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dev_gro_receive+0x132/0x2720 net/core/dev.c:5427
Code: 48 c1 ea 03 80 3c 02 00 0f 85 6e 20 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6e 10 49 8d bd d0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 59 20 00 00 4d 8b a5 d0 00 00 00 31 ff 41 81 e4
RSP: 0018:ffff8801c400f410 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8618d325
RDX: 000000000000001a RSI: ffffffff86189f97 RDI: 00000000000000d0
RBP: ffff8801c400f608 R08: ffff8801c8fb4300 R09: 0000000000000000
R10: ffffed0038801ed7 R11: 0000000000000003 R12: ffff8801d327d358
R13: 0000000000000000 R14: ffff8801c16dd8c0 R15: 0000000000000004
FS:  00007fe003615700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1f3c43db8 CR3: 00000001bebb2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 napi_gro_frags+0x3f4/0xc90 net/core/dev.c:5715
 tun_get_user+0x31d5/0x42a0 drivers/net/tun.c:1922
 tun_chr_write_iter+0xb9/0x154 drivers/net/tun.c:1967
 call_write_iter include/linux/fs.h:1808 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457579
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe003614c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 0000000000000012 RSI: 0000000020000000 RDI: 000000000000000a
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe0036156d4
R13: 00000000004c5574 R14: 00000000004d8e98 R15: 00000000ffffffff
Modules linked in:

RIP: 0010:dev_gro_receive+0x132/0x2720 net/core/dev.c:5427
Code: 48 c1 ea 03 80 3c 02 00 0f 85 6e 20 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6e 10 49 8d bd d0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 59 20 00 00 4d 8b a5 d0 00 00 00 31 ff 41 81 e4
RSP: 0018:ffff8801c400f410 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8618d325
RDX: 000000000000001a RSI: ffffffff86189f97 RDI: 00000000000000d0
RBP: ffff8801c400f608 R08: ffff8801c8fb4300 R09: 0000000000000000
R10: ffffed0038801ed7 R11: 0000000000000003 R12: ffff8801d327d358
R13: 0000000000000000 R14: ffff8801c16dd8c0 R15: 0000000000000004
FS:  00007fe003615700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1f3c43db8 CR3: 00000001bebb2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Fixes: 90e33d45 ("tun: enable napi_gro_frags() for TUN/TAP driver")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      af3fb24e
    • Eric Dumazet's avatar
      tun: initialize napi_mutex unconditionally · c7256f57
      Eric Dumazet authored 
      This is the first part to fix following syzbot report :

console output: https://syzkaller.appspot.com/x/log.txt?x=145378e6400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=443816db871edd66
dashboard link: https://syzkaller.appspot.com/bug?extid=e662df0ac1d753b57e80

Following patch is fixing the race condition, but it seems safer
to initialize this mutex at tfile creation anyway.

Fixes: 90e33d45 ("tun: enable napi_gro_frags() for TUN/TAP driver")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: syzbot+e662df0ac1d753b57e80@syzkaller.appspotmail.com
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c7256f57
    • Eric Dumazet's avatar
      tun: remove unused parameters · 06e55add
      Eric Dumazet authored 
      tun_napi_disable() and tun_napi_del() do not need
a pointer to the tun_struct
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      06e55add
    • Dave Jones's avatar
      bond: take rcu lock in netpoll_send_skb_on_dev · 6fe94878
      Dave Jones authored 
      The bonding driver lacks the rcu lock when it calls down into
netdev_lower_get_next_private_rcu from bond_poll_controller, which
results in a trace like:

WARNING: CPU: 2 PID: 179 at net/core/dev.c:6567 netdev_lower_get_next_private_rcu+0x34/0x40
CPU: 2 PID: 179 Comm: kworker/u16:15 Not tainted 4.19.0-rc5-backup+ #1
Workqueue: bond0 bond_mii_monitor
RIP: 0010:netdev_lower_get_next_private_rcu+0x34/0x40
Code: 48 89 fb e8 fe 29 63 ff 85 c0 74 1e 48 8b 45 00 48 81 c3 c0 00 00 00 48 8b 00 48 39 d8 74 0f 48 89 45 00 48 8b 40 f8 5b 5d c3 <0f> 0b eb de 31 c0 eb f5 0f 1f 40 00 0f 1f 44 00 00 48 8>
RSP: 0018:ffffc9000087fa68 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff880429614560 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffffffffa184ada0
RBP: ffffc9000087fa80 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc9000087f9f0 R11: ffff880429798040 R12: ffff8804289d5980
R13: ffffffffa1511f60 R14: 00000000000000c8 R15: 00000000ffffffff
FS:  0000000000000000(0000) GS:ffff88042f880000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b78fce180 CR3: 000000018180f006 CR4: 00000000001606e0
Call Trace:
 bond_poll_controller+0x52/0x170
 netpoll_poll_dev+0x79/0x290
 netpoll_send_skb_on_dev+0x158/0x2c0
 netpoll_send_udp+0x2d5/0x430
 write_ext_msg+0x1e0/0x210
 console_unlock+0x3c4/0x630
 vprintk_emit+0xfa/0x2f0
 printk+0x52/0x6e
 ? __netdev_printk+0x12b/0x220
 netdev_info+0x64/0x80
 ? bond_3ad_set_carrier+0xe9/0x180
 bond_select_active_slave+0x1fc/0x310
 bond_mii_monitor+0x709/0x9b0
 process_one_work+0x221/0x5e0
 worker_thread+0x4f/0x3b0
 kthread+0x100/0x140
 ? process_one_work+0x5e0/0x5e0
 ? kthread_delayed_work_timer_fn+0x90/0x90
 ret_from_fork+0x24/0x30

We're also doing rcu dereferences a layer up in netpoll_send_skb_on_dev
before we call down into netpoll_poll_dev, so just take the lock there.
Suggested-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: default avatarDave Jones <davej@codemonkey.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6fe94878
    • David Ahern's avatar
      rtnetlink: Fail dump if target netnsid is invalid · 893626d6
      David Ahern authored 
      Link dumps can return results from a target namespace. If the namespace id
is invalid, then the dump request should fail if get_target_net fails
rather than continuing with a dump of the current namespace.

Fixes: 79e1ad14 ("rtnetlink: use netnsid to query interface")
Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      893626d6
    • Flavio Leitner's avatar
      Revert "openvswitch: Fix template leak in error cases." · 7f6d6558
      Flavio Leitner authored 
      This reverts commit 90c7afc9.

When the commit was merged, the code used nf_ct_put() to free
the entry, but later on commit 76644232 ("openvswitch: Free
tmpl with tmpl_free.") replaced that with nf_ct_tmpl_free which
is a more appropriate. Now the original problem is removed.

Then 44d6e2f2 ("net: Replace NF_CT_ASSERT() with WARN_ON().")
replaced a debug assert with a WARN_ON() which is trigged now.
Signed-off-by: default avatarFlavio Leitner <fbl@redhat.com>
Acked-by: default avatarJoe Stringer <joe@ovn.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7f6d6558
    • David S. Miller's avatar
      Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth · 92d7c74b
      David S. Miller authored 
      Johan Hedberg says:

====================
pull request: bluetooth 2018-09-27

Here's one more Bluetooth fix for 4.19, fixing the handling of an
attempt to unpair a device while pairing is in progress.

Let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      92d7c74b
    • LUU Duc Canh's avatar
      tipc: ignore STATE_MSG on wrong link session · d949cfed
      LUU Duc Canh authored 
      The initial session number when a link is created is based on a random
value, taken from struct tipc_net->random. It is then incremented for
each link reset to avoid mixing protocol messages from different link
sessions.

However, when a bearer is reset all its links are deleted, and will
later be re-created using the same random value as the first time.
This means that if the link never went down between creation and
deletion we will still sometimes have two subsequent sessions with
the same session number. In virtual environments with potentially
long transmission times this has turned out to be a real problem.

We now fix this by randomizing the session number each time a link
is created.

With a session number size of 16 bits this gives a risk of session
collision of 1/64k. To reduce this further, we also introduce a sanity
check on the very first STATE message arriving at a link. If this has
an acknowledge value differing from 0, which is logically impossible,
we ignore the message. The final risk for session collision is hence
reduced to 1/4G, which should be sufficient.
Signed-off-by: default avatarLUU Duc Canh <canh.d.luu@dektech.com.au>
Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d949cfed
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