- 13 Sep, 2017 33 commits
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Greg Kroah-Hartman authored
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Richard Wareing authored
commit b31ff3cd upstream. If using a kernel with CONFIG_XFS_RT=y and we set the RHINHERIT flag on a directory in a filesystem that does not have a realtime device and create a new file in that directory, it gets marked as a real time file. When data is written and a fsync is issued, the filesystem attempts to flush a non-existent rt device during the fsync process. This results in a crash dereferencing a null buftarg pointer in xfs_blkdev_issue_flush(): BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: xfs_blkdev_issue_flush+0xd/0x20 ..... Call Trace: xfs_file_fsync+0x188/0x1c0 vfs_fsync_range+0x3b/0xa0 do_fsync+0x3d/0x70 SyS_fsync+0x10/0x20 do_syscall_64+0x4d/0xb0 entry_SYSCALL64_slow_path+0x25/0x25 Setting RT inode flags does not require special privileges so any unprivileged user can cause this oops to occur. To reproduce, confirm kernel is compiled with CONFIG_XFS_RT=y and run: # mkfs.xfs -f /dev/pmem0 # mount /dev/pmem0 /mnt/test # mkdir /mnt/test/foo # xfs_io -c 'chattr +t' /mnt/test/foo # xfs_io -f -c 'pwrite 0 5m' -c fsync /mnt/test/foo/bar Or just run xfstests with MKFS_OPTIONS="-d rtinherit=1" and wait. Kernels built with CONFIG_XFS_RT=n are not exposed to this bug. Fixes: f538d4da ("[XFS] write barrier support") Signed-off-by:
Richard Wareing <rwareing@fb.com> Signed-off-by:
Dave Chinner <david@fromorbit.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Trond Myklebust authored
commit 196639eb upstream. The writeback code wants to send a commit after processing the pages, which is why we want to delay releasing the struct path until after that's done. Also, the layout code expects that we do not free the inode before we've put the layout segments in pnfs_writehdr_free() and pnfs_readhdr_free() Fixes: 919e3bd9 ("NFS: Ensure we commit after writeback is complete") Fixes: 4714fb51 ("nfs: remove pgio_header refcount, related cleanup") Signed-off-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Mark Rutland authored
commit 746a272e upstream. When there's a fatal signal pending, arm's do_page_fault() implementation returns 0. The intent is that we'll return to the faulting userspace instruction, delivering the signal on the way. However, if we take a fatal signal during fixing up a uaccess, this results in a return to the faulting kernel instruction, which will be instantly retried, resulting in the same fault being taken forever. As the task never reaches userspace, the signal is not delivered, and the task is left unkillable. While the task is stuck in this state, it can inhibit the forward progress of the system. To avoid this, we must ensure that when a fatal signal is pending, we apply any necessary fixup for a faulting kernel instruction. Thus we will return to an error path, and it is up to that code to make forward progress towards delivering the fatal signal. Signed-off-by:
Mark Rutland <mark.rutland@arm.com> Reviewed-by:
Steve Capper <steve.capper@arm.com> Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Ben Seri authored
commit e860d2c9 upstream. Validate the output buffer length for L2CAP config requests and responses to avoid overflowing the stack buffer used for building the option blocks. Signed-off-by:
Ben Seri <ben@armis.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
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Takashi Iwai authored
commit 20e2b791 upstream. The ISA msnd drivers have loops fetching the ring-buffer head, tail and size values inside the loops. Such codes are inefficient and fragile. This patch optimizes it, and also adds the sanity check to avoid the endless loops. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196131 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196133Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
grygorii tertychnyi <gtertych@cisco.com> Signed-off-by:
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Yang Shi authored
commit f4dbba59 upstream. When running locktorture module with the below commands with kmemleak enabled: $ modprobe locktorture torture_type=rw_lock_irq $ rmmod locktorture The below kmemleak got caught: root@10:~# echo scan > /sys/kernel/debug/kmemleak [ 323.197029] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) root@10:~# cat /sys/kernel/debug/kmemleak unreferenced object 0xffffffc07592d500 (size 128): comm "modprobe", pid 368, jiffies 4294924118 (age 205.824s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 c3 7b 02 00 00 00 00 00 .........{...... 00 00 00 00 00 00 00 00 d7 9b 02 00 00 00 00 00 ................ backtrace: [<ffffff80081e5a88>] create_object+0x110/0x288 [<ffffff80086c6078>] kmemleak_alloc+0x58/0xa0 [<ffffff80081d5acc>] __kmalloc+0x234/0x318 [<ffffff80006fa130>] 0xffffff80006fa130 [<ffffff8008083ae4>] do_one_initcall+0x44/0x138 [<ffffff800817e28c>] do_init_module+0x68/0x1cc [<ffffff800811c848>] load_module+0x1a68/0x22e0 [<ffffff800811d340>] SyS_finit_module+0xe0/0xf0 [<ffffff80080836f0>] el0_svc_naked+0x24/0x28 [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffffffc07592d480 (size 128): comm "modprobe", pid 368, jiffies 4294924118 (age 205.824s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 3b 6f 01 00 00 00 00 00 ........;o...... 00 00 00 00 00 00 00 00 23 6a 01 00 00 00 00 00 ........#j...... backtrace: [<ffffff80081e5a88>] create_object+0x110/0x288 [<ffffff80086c6078>] kmemleak_alloc+0x58/0xa0 [<ffffff80081d5acc>] __kmalloc+0x234/0x318 [<ffffff80006fa22c>] 0xffffff80006fa22c [<ffffff8008083ae4>] do_one_initcall+0x44/0x138 [<ffffff800817e28c>] do_init_module+0x68/0x1cc [<ffffff800811c848>] load_module+0x1a68/0x22e0 [<ffffff800811d340>] SyS_finit_module+0xe0/0xf0 [<ffffff80080836f0>] el0_svc_naked+0x24/0x28 [<ffffffffffffffff>] 0xffffffffffffffff It is because cxt.lwsa and cxt.lrsa don't get freed in module_exit, so free them in lock_torture_cleanup() and free writer_tasks if reader_tasks is failed at memory allocation. Signed-off-by:
Yang Shi <yang.shi@linaro.org> Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by:
Josh Triplett <josh@joshtriplett.org> Cc: 石洋 <yang.s@alibaba-inc.com> Signed-off-by:
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Aleksa Sarai authored
commit 6c6b5a39 upstream. Several distributions mount the "proper root" as ro during initrd and then remount it as rw before pivot_root(2). Thus, if a rescan had been aborted by a previous shutdown, the rescan would never be resumed. This issue would manifest itself as several btrfs ioctl(2)s causing the entire machine to hang when btrfs_qgroup_wait_for_completion was hit (due to the fs_info->qgroup_rescan_running flag being set but the rescan itself not being resumed). Notably, Docker's btrfs storage driver makes regular use of BTRFS_QUOTA_CTL_DISABLE and BTRFS_IOC_QUOTA_RESCAN_WAIT (causing this problem to be manifested on boot for some machines). Cc: Jeff Mahoney <jeffm@suse.com> Fixes: b382a324 ("Btrfs: fix qgroup rescan resume on mount") Signed-off-by:
Aleksa Sarai <asarai@suse.de> Reviewed-by:
Nikolay Borisov <nborisov@suse.com> Tested-by:
David Sterba <dsterba@suse.com> Signed-off-by:
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John Stultz authored
commit 3587c856 upstream. I've found that by just turning the chip on and off via the POWER_DOWN register, I end up getting i2c_transfer errors on HiKey. Investigating further, it turns out that some of the register state in hardware is getting lost, as the device registers are reset when the chip is powered down. Thus this patch simply re-writes the i2c address to the ADV7511_REG_EDID_I2C_ADDR register to ensure its properly set before we try to read the EDID data. Cc: David Airlie <airlied@linux.ie> Cc: Archit Taneja <architt@codeaurora.org> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by:
John Stultz <john.stultz@linaro.org> Signed-off-by:
Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-7-git-send-email-john.stultz@linaro.orgSigned-off-by:
Thong Ho <thong.ho.px@rvc.renesas.com> Signed-off-by:
Nhan Nguyen <nhan.nguyen.yb@renesas.com> Signed-off-by:
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John Stultz authored
commit 6d5104c5 upstream. In chasing down a previous issue with EDID probing from calling drm_helper_hpd_irq_event() from irq context, Laurent noticed that the DRM documentation suggests that drm_kms_helper_hotplug_event() should be used instead. Thus this patch replaces drm_helper_hpd_irq_event() with drm_kms_helper_hotplug_event(), which requires we update the connector.status entry and only call _hotplug_event() when the status changes. Cc: David Airlie <airlied@linux.ie> Cc: Archit Taneja <architt@codeaurora.org> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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John Stultz authored
commit 518cb705 upstream. I was recently seeing issues with EDID probing, where the logic to wait for the EDID read bit to be set by the IRQ wasn't happening and the code would time out and fail. Digging deeper, I found this was due to the fact that IRQs were disabled as we were running in IRQ context from the HPD signal. Thus this patch changes the logic to handle the HPD signal via a work_struct so we can be out of irq context. With this patch, the EDID probing on hotplug does not time out. Cc: David Airlie <airlied@linux.ie> Cc: Archit Taneja <architt@codeaurora.org> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by:
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Archit Taneja authored
commit f0bfcc22 upstream. When the adv7511 i2c client doesn't have an interrupt line, we observe a deadlock on caused by trying to lock drm device's mode_config.mutex twice in the same context. Here is the sequence that causes it: ioctl DRM_IOCTL_MODE_GETCONNECTOR from userspace drm_mode_getconnector (acquires mode_config mutex) connector->fill_modes() drm_helper_probe_single_connector_modes connector_funcs->get_modes adv7511_encoder_get_modes adv7511_get_edid_block adv7511_irq_process drm_helper_hpd_irq_event (acquires mode_config mutex again) In adv7511_irq_process, don't call drm_helper_hpd_irq_event when not called from the interrupt handler. It doesn't serve any purpose there anyway. Signed-off-by:
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Wolfram Sang authored
commit d0be8584 upstream. The interrupts for EDID_READY or DDC_ERROR were never enabled in this driver, so reading EDID always timed out when chip was powered down and interrupts were used. Fix this and also remove clearing the interrupt flags, they are cleared in POWER_DOWN mode anyhow (unlike the interrupt enable flags) according to docs and my tests. Signed-off-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by:
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Todd Poynor authored
commit 8d26f491 upstream. Commit 1bc0eb04 ("scsi: sg: protect accesses to 'reserved' page array") adds needed concurrency protection for the "reserve" buffer. Some checks that are initially made outside the lock are replicated once the lock is taken to ensure the checks and resulting decisions are made using consistent state. The check that a request with flag SG_FLAG_MMAP_IO set fits in the reserve buffer also needs to be performed again under the lock to ensure the reserve buffer length compared against matches the value in effect when the request is linked to the reserve buffer. An -ENOMEM should be returned in this case, instead of switching over to an indirect buffer as for non-MMAP_IO requests. Signed-off-by:
Todd Poynor <toddpoynor@google.com> Acked-by:
Douglas Gilbert <dgilbert@interlog.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Todd Poynor authored
commit 6a8dadcc upstream. Take f_mutex around mmap() processing to protect against races with the SG_SET_RESERVED_SIZE ioctl. Ensure the reserve buffer length remains consistent during the mapping operation, and set the "mmap called" flag to prevent further changes to the reserved buffer size as an atomic operation with the mapping. [mkp: fixed whitespace] Signed-off-by:
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Andrey Korolyov authored
commit 591b6bb6 upstream. Several legacy devices such as Geode-based Cisco ASA appliances and DB800 development board do possess CS5536 IDE controller with different PCI id than existing one. Using pata_generic is not always feasible as at least DB800 requires MSR quirk from pata_cs5536 to be used with vendor firmware. Signed-off-by:
Andrey Korolyov <andrey@xdel.ru> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Ben Hutchings authored
commit fbf1c41f upstream. Commit 0a94efb5 ("workqueue: implicit ordered attribute should be overridable") introduced a __WQ_ORDERED_EXPLICIT flag but gave it the same value as __WQ_LEGACY. I don't believe these were intended to mean the same thing, so renumber __WQ_ORDERED_EXPLICIT. Fixes: 0a94efb5 ("workqueue: implicit ordered attribute should be ...") Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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Ilia Mirkin authored
commit bc60c90f upstream. It appears that MSI does not work on either G5 PPC nor on a E5500-based platform, where other hardware is reported to work fine with MSI. Both tests were conducted with NV4x hardware, so perhaps other (or even this) hardware can be made to work. It's still possible to force-enable with config=NvMSI=1 on load. Signed-off-by:
Ilia Mirkin <imirkin@alum.mit.edu> Signed-off-by:
Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
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Brian Norris authored
commit 4b5dde2d upstream. mwifiex records information about various channels as it receives scan information. It does this by appending to a buffer that was sized to the max number of supported channels on any band, but there are numerous problems: (a) scans can return info from more than one band (e.g., both 2.4 and 5 GHz), so the determined "max" is not large enough (b) some firmware appears to return multiple results for a given channel, so the max *really* isn't large enough (c) there is no bounds checking when stashing these stats, so problems (a) and (b) can easily lead to buffer overflows Let's patch this by setting a slightly-more-correct max (that accounts for a combination of both 2.4G and 5G bands) and adding a bounds check when writing to our statistics buffer. Due to problem (b), we still might not properly report all known survey information (e.g., with "iw <dev> survey dump"), since duplicate results (or otherwise "larger than expected" results) will cause some truncation. But that's a problem for a future bugfix. (And because of this known deficiency, only log the excess at the WARN level, since that isn't visible by default in this driver and would otherwise be a bit too noisy.) Fixes: bf354433 ("mwifiex: channel statistics support for mwifiex") Cc: Avinash Patil <patila@marvell.com> Cc: Xinming Hu <huxm@marvell.com> Signed-off-by:
Brian Norris <briannorris@chromium.org> Reviewed-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by:
Ganapathi Bhat <gbhat@marvell.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Edwin Török authored
commit 55acdd92 upstream. Can be reproduced when running dlm_controld (tested on 4.4.x, 4.12.4): # seq 1 100 | xargs -P0 -n1 dlm_tool join # seq 1 100 | xargs -P0 -n1 dlm_tool leave misc_register fails due to duplicate sysfs entry, which causes dlm_device_register to free ls->ls_device.name. In dlm_device_deregister the name was freed again, causing memory corruption. According to the comment in dlm_device_deregister the name should've been set to NULL when registration fails, so this patch does that. sysfs: cannot create duplicate filename '/dev/char/10:1' ------------[ cut here ]------------ warning: cpu: 1 pid: 4450 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x56/0x70 modules linked in: msr rfcomm dlm ccm bnep dm_crypt uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev btusb media btrtl btbcm btintel bluetooth ecdh_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel thinkpad_acpi pcbc nvram snd_seq_midi snd_seq_midi_event aesni_intel snd_hda_codec_realtek snd_hda_codec_generic snd_rawmidi aes_x86_64 crypto_simd glue_helper snd_hda_intel snd_hda_codec cryptd intel_cstate arc4 snd_hda_core snd_seq snd_seq_device snd_hwdep iwldvm intel_rapl_perf mac80211 joydev input_leds iwlwifi serio_raw cfg80211 snd_pcm shpchp snd_timer snd mac_hid mei_me lpc_ich mei soundcore sunrpc parport_pc ppdev lp parport autofs4 i915 psmouse e1000e ahci libahci i2c_algo_bit sdhci_pci ptp drm_kms_helper sdhci pps_core syscopyarea sysfillrect sysimgblt fb_sys_fops drm wmi video cpu: 1 pid: 4450 comm: dlm_test.exe not tainted 4.12.4-041204-generic hardware name: lenovo 232425u/232425u, bios g2et82ww (2.02 ) 09/11/2012 task: ffff96b0cbabe140 task.stack: ffffb199027d0000 rip: 0010:sysfs_warn_dup+0x56/0x70 rsp: 0018:ffffb199027d3c58 eflags: 00010282 rax: 0000000000000038 rbx: ffff96b0e2c49158 rcx: 0000000000000006 rdx: 0000000000000000 rsi: 0000000000000086 rdi: ffff96b15e24dcc0 rbp: ffffb199027d3c70 r08: 0000000000000001 r09: 0000000000000721 r10: ffffb199027d3c00 r11: 0000000000000721 r12: ffffb199027d3cd1 r13: ffff96b1592088f0 r14: 0000000000000001 r15: ffffffffffffffef fs: 00007f78069c0700(0000) gs:ffff96b15e240000(0000) knlgs:0000000000000000 cs: 0010 ds: 0000 es: 0000 cr0: 0000000080050033 cr2: 000000178625ed28 cr3: 0000000091d3e000 cr4: 00000000001406e0 call trace: sysfs_do_create_link_sd.isra.2+0x9e/0xb0 sysfs_create_link+0x25/0x40 device_add+0x5a9/0x640 device_create_groups_vargs+0xe0/0xf0 device_create_with_groups+0x3f/0x60 ? snprintf+0x45/0x70 misc_register+0x140/0x180 device_write+0x6a8/0x790 [dlm] __vfs_write+0x37/0x160 ? apparmor_file_permission+0x1a/0x20 ? security_file_permission+0x3b/0xc0 vfs_write+0xb5/0x1a0 sys_write+0x55/0xc0 ? sys_fcntl+0x5d/0xb0 entry_syscall_64_fastpath+0x1e/0xa9 rip: 0033:0x7f78083454bd rsp: 002b:00007f78069bbd30 eflags: 00000293 orig_rax: 0000000000000001 rax: ffffffffffffffda rbx: 0000000000000006 rcx: 00007f78083454bd rdx: 000000000000009c rsi: 00007f78069bee00 rdi: 0000000000000005 rbp: 00007f77f8000a20 r08: 000000000000fcf0 r09: 0000000000000032 r10: 0000000000000024 r11: 0000000000000293 r12: 00007f78069bde00 r13: 00007f78069bee00 r14: 000000000000000a r15: 00007f78069bbd70 code: 85 c0 48 89 c3 74 12 b9 00 10 00 00 48 89 c2 31 f6 4c 89 ef e8 2c c8 ff ff 4c 89 e2 48 89 de 48 c7 c7 b0 8e 0c a8 e8 41 e8 ed ff <0f> ff 48 89 df e8 00 d5 f4 ff 5b 41 5c 41 5d 5d c3 66 0f 1f 84 ---[ end trace 40412246357cc9e0 ]--- dlm: 59f24629-ae39-44e2-9030-397ebc2eda26: leaving the lockspace group... bug: unable to handle kernel null pointer dereference at 0000000000000001 ip: [<ffffffff811a3b4a>] kmem_cache_alloc+0x7a/0x140 pgd 0 oops: 0000 [#1] smp modules linked in: dlm 8021q garp mrp stp llc openvswitch nf_defrag_ipv6 nf_conntrack libcrc32c iptable_filter dm_multipath crc32_pclmul dm_mod aesni_intel psmouse aes_x86_64 sg ablk_helper cryptd lrw gf128mul glue_helper i2c_piix4 nls_utf8 tpm_tis tpm isofs nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc xen_wdt ip_tables x_tables autofs4 hid_generic usbhid hid sr_mod cdrom sd_mod ata_generic pata_acpi 8139too serio_raw ata_piix 8139cp mii uhci_hcd ehci_pci ehci_hcd libata scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_mod ipv6 cpu: 0 pid: 394 comm: systemd-udevd tainted: g w 4.4.0+0 #1 hardware name: xen hvm domu, bios 4.7.2-2.2 05/11/2017 task: ffff880002410000 ti: ffff88000243c000 task.ti: ffff88000243c000 rip: e030:[<ffffffff811a3b4a>] [<ffffffff811a3b4a>] kmem_cache_alloc+0x7a/0x140 rsp: e02b:ffff88000243fd90 eflags: 00010202 rax: 0000000000000000 rbx: ffff8800029864d0 rcx: 000000000007b36c rdx: 000000000007b36b rsi: 00000000024000c0 rdi: ffff880036801c00 rbp: ffff88000243fdc0 r08: 0000000000018880 r09: 0000000000000054 r10: 000000000000004a r11: ffff880034ace6c0 r12: 00000000024000c0 r13: ffff880036801c00 r14: 0000000000000001 r15: ffffffff8118dcc2 fs: 00007f0ab77548c0(0000) gs:ffff880036e00000(0000) knlgs:0000000000000000 cs: e033 ds: 0000 es: 0000 cr0: 0000000080050033 cr2: 0000000000000001 cr3: 000000000332d000 cr4: 0000000000040660 stack: ffffffff8118dc90 ffff8800029864d0 0000000000000000 ffff88003430b0b0 ffff880034b78320 ffff88003430b0b0 ffff88000243fdf8 ffffffff8118dcc2 ffff8800349c6700 ffff8800029864d0 000000000000000b 00007f0ab7754b90 call trace: [<ffffffff8118dc90>] ? anon_vma_fork+0x60/0x140 [<ffffffff8118dcc2>] anon_vma_fork+0x92/0x140 [<ffffffff8107033e>] copy_process+0xcae/0x1a80 [<ffffffff8107128b>] _do_fork+0x8b/0x2d0 [<ffffffff81071579>] sys_clone+0x19/0x20 [<ffffffff815a30ae>] entry_syscall_64_fastpath+0x12/0x71 ] code: f6 75 1c 4c 89 fa 44 89 e6 4c 89 ef e8 a7 e4 00 00 41 f7 c4 00 80 00 00 49 89 c6 74 47 eb 32 49 63 45 20 48 8d 4a 01 4d 8b 45 00 <49> 8b 1c 06 4c 89 f0 65 49 0f c7 08 0f 94 c0 84 c0 74 ac 49 63 rip [<ffffffff811a3b4a>] kmem_cache_alloc+0x7a/0x140 rsp <ffff88000243fd90> cr2: 0000000000000001 --[ end trace 70cb9fd1b164a0e8 ]-- Signed-off-by:
Edwin Török <edvin.torok@citrix.com> Signed-off-by:
David Teigland <teigland@redhat.com> Signed-off-by:
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Dmitry Tunin authored
commit a81d72d2 upstream. T: Bus=02 Lev=01 Prnt=01 Port=03 Cnt=03 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=13d3 ProdID=3494 Rev= 2.00 S: Manufacturer=Realtek S: Product=Bluetooth Radio S: SerialNumber=00e04c000001 C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms Signed-off-by:
Dmitry Tunin <hanipouspilot@gmail.com> Signed-off-by:
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Malcolm Priestley authored
commit fc81bab5 upstream. _rtl_pci_find_adapter fail path will jump to label fail3 for unsupported adapter types. However, on course for fail3 there will be call rtl_deinit_core before rtl_init_core. For the inclusion of checking pci_iounmap this fail can be moved to fail2. Fixes [ 4.492963] BUG: unable to handle kernel NULL pointer dereference at (null) [ 4.493067] IP: rtl_deinit_core+0x31/0x90 [rtlwifi] Signed-off-by:
Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by:
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Oscar Campos authored
commit 293b915f upstream. Trackpoint buttons detection fails on ThinkPad 570 and 470 series, this makes the middle button of the trackpoint to not being recogized. As I don't believe there is any trackpoint with less than 3 buttons this patch just assumes three buttons when the extended button information read fails. Signed-off-by:
Oscar Campos <oscar.campos@member.fsf.org> Acked-by:
Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by:
Aaron Ma <aaron.ma@canonical.com> Signed-off-by:
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Rakesh Pillai authored
commit f35a7f91 upstream. The rx ring buffers are added to a hash table if firmware support full rx reorder. If the full rx reorder support flag is not set before allocating the rx ring buffers, none of the buffers are added to the hash table. There is a race condition between rx ring refill and rx buffer replenish from napi poll. The interrupts are enabled in hif start, before the rx ring is refilled during init. We replenish buffers from napi poll due to the interrupts which get enabled after hif start. Hence before the entire rx ring is refilled during the init, the napi poll replenishes a few buffers in steps of 100 buffers per attempt. During this rx ring replenish from napi poll, the rx reorder flag has not been set due to which the replenished buffers are not added to the hash table Set the rx full reorder support flag before we allocate the rx ring buffer to avoid the memory leak. Signed-off-by:
Rakesh Pillai <pillair@qti.qualcomm.com> Signed-off-by:
Kalle Valo <kvalo@qca.qualcomm.com> Cc: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by:
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Alexander Shishkin authored
commit efb3669e upstream. This adds Intel(R) Trace Hub PCI ID for Cannon Lake PCH-LP. Signed-off-by:
Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:
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Alexander Shishkin authored
commit 84331e13 upstream. This adds Intel(R) Trace Hub PCI ID for Cannon Lake PCH-H. Signed-off-by:
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Christophe JAILLET authored
commit 0f9b011d upstream. The .release function of driver_ktype is 'driver_release()'. This function frees the container_of this kobject. So, this memory must not be freed explicitly in the error handling path of 'bus_add_driver()'. Otherwise a double free will occur. Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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Colin Ian King authored
commit 34ff1bf4 upstream. The mask of sns_key_info1 suggests the upper nybble is being extracted however the following shift of 8 bits is too large and always results in 0. Fix this by shifting only by 4 bits to correctly get the upper nybble. Detected by CoverityScan, CID#142891 ("Operands don't affect result") Fixes: fa590c22 ("staging: rts5208: add support for rts5208 and rts5288") Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Douglas Anderson authored
commit ed62ca2f upstream. While running reboot tests w/ a specific set of USB devices (and slub_debug enabled), I found that once every few hours my device would be crashed with a stack that looked like this: [ 14.012445] BUG: spinlock bad magic on CPU#0, modprobe/2091 [ 14.012460] lock: 0xffffffc0cb055978, .magic: ffffffc0, .owner: cryption contexts: %lu/%lu [ 14.012460] /1025536097, .owner_cpu: 0 [ 14.012466] CPU: 0 PID: 2091 Comm: modprobe Not tainted 4.4.79 #352 [ 14.012468] Hardware name: Google Kevin (DT) [ 14.012471] Call trace: [ 14.012483] [<....>] dump_backtrace+0x0/0x160 [ 14.012487] [<....>] show_stack+0x20/0x28 [ 14.012494] [<....>] dump_stack+0xb4/0xf0 [ 14.012500] [<....>] spin_dump+0x8c/0x98 [ 14.012504] [<....>] spin_bug+0x30/0x3c [ 14.012508] [<....>] do_raw_spin_lock+0x40/0x164 [ 14.012515] [<....>] _raw_spin_lock_irqsave+0x64/0x74 [ 14.012521] [<....>] __wake_up+0x2c/0x60 [ 14.012528] [<....>] async_completed+0x2d0/0x300 [ 14.012534] [<....>] __usb_hcd_giveback_urb+0xc4/0x138 [ 14.012538] [<....>] usb_hcd_giveback_urb+0x54/0xf0 [ 14.012544] [<....>] xhci_irq+0x1314/0x1348 [ 14.012548] [<....>] usb_hcd_irq+0x40/0x50 [ 14.012553] [<....>] handle_irq_event_percpu+0x1b4/0x3f0 [ 14.012556] [<....>] handle_irq_event+0x4c/0x7c [ 14.012561] [<....>] handle_fasteoi_irq+0x158/0x1c8 [ 14.012564] [<....>] generic_handle_irq+0x30/0x44 [ 14.012568] [<....>] __handle_domain_irq+0x90/0xbc [ 14.012572] [<....>] gic_handle_irq+0xcc/0x18c Investigation using kgdb() found that the wait queue that was passed into wake_up() had been freed (it was filled with slub_debug poison). I analyzed and instrumented the code and reproduced. My current belief is that this is happening: 1. async_completed() is called (from IRQ). Moves "as" onto the completed list. 2. On another CPU, proc_reapurbnonblock_compat() calls async_getcompleted(). Blocks on spinlock. 3. async_completed() releases the lock; keeps running; gets blocked midway through wake_up(). 4. proc_reapurbnonblock_compat() => async_getcompleted() gets the lock; removes "as" from completed list and frees it. 5. usbdev_release() is called. Frees "ps". 6. async_completed() finally continues running wake_up(). ...but wake_up() has a pointer to the freed "ps". The instrumentation that led me to believe this was based on adding some trace_printk() calls in a select few functions and then using kdb's "ftdump" at crash time. The trace follows (NOTE: in the trace below I cheated a little bit and added a udelay(1000) in async_completed() after releasing the spinlock because I wanted it to trigger quicker): <...>-2104 0d.h2 13759034us!: async_completed at start: as=ffffffc0cc638200 mtpd-2055 3.... 13759356us : async_getcompleted before spin_lock_irqsave mtpd-2055 3d..1 13759362us : async_getcompleted after list_del_init: as=ffffffc0cc638200 mtpd-2055 3.... 13759371us+: proc_reapurbnonblock_compat: free_async(ffffffc0cc638200) mtpd-2055 3.... 13759422us+: async_getcompleted before spin_lock_irqsave mtpd-2055 3.... 13759479us : usbdev_release at start: ps=ffffffc0cc042080 mtpd-2055 3.... 13759487us : async_getcompleted before spin_lock_irqsave mtpd-2055 3.... 13759497us!: usbdev_release after kfree(ps): ps=ffffffc0cc042080 <...>-2104 0d.h2 13760294us : async_completed before wake_up(): as=ffffffc0cc638200 To fix this problem we can just move the wake_up() under the ps->lock. There should be no issues there that I'm aware of. Signed-off-by:
Douglas Anderson <dianders@chromium.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Sandeep Singh authored
commit e6b422b8 upstream. The following commit cause a regression on ATI chipsets. 'commit e788787e ("usb:xhci:Add quirk for Certain failing HP keyboard on reset after resume")' This causes pinfo->smbus_dev to be wrongly set to NULL on systems with the ATI chipset that this function checks for first. Added conditional check for AMD chipsets to avoid the overwriting pinfo->smbus_dev. Reported-by:
Sandeep Singh <Sandeep.Singh@amd.com> Signed-off-by:
Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Signed-off-by:
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Dmitry Fleytman authored
commit a1279ef7 upstream. Commit e0429362 ("usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e") introduced quirk to workaround an issue with some Logitech webcams. Apparently model C920-C has the same issue so applying the same quirk as well. See aforementioned commit message for detailed explanation of the problem. Signed-off-by:
Dmitry Fleytman <dmitry@daynix.com> Signed-off-by:
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Maciej S. Szmigiero authored
commit 169e8654 upstream. This commit adds support (an ID, really) for D-Link DWM-157 hardware version C1 USB modem to option driver. According to manufacturer-provided Windows INF file the device has four serial ports: "D-Link HSPA+DataCard Diagnostics Interface" (interface 2; modem port), "D-Link HSPA+DataCard NMEA Device" (interface 3), "D-Link HSPA+DataCard Speech Port" (interface 4), "D-Link HSPA+DataCard Debug Port" (interface 5). usb-devices output: T: Bus=05 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#= 3 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=2001 ProdID=7d0e Rev=03.00 S: Manufacturer=D-Link,Inc S: Product=D-Link DWM-157 C: #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=01 Driver=option I: If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I: If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I: If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option I: If#= 6 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage Signed-off-by:
Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Kai-Heng Feng authored
commit de3af5bf upstream. Corsair Strafe RGB keyboard has trouble to initialize: [ 1.679455] usb 3-6: new full-speed USB device number 4 using xhci_hcd [ 6.871136] usb 3-6: unable to read config index 0 descriptor/all [ 6.871138] usb 3-6: can't read configurations, error -110 [ 6.991019] usb 3-6: new full-speed USB device number 5 using xhci_hcd [ 12.246642] usb 3-6: unable to read config index 0 descriptor/all [ 12.246644] usb 3-6: can't read configurations, error -110 [ 12.366555] usb 3-6: new full-speed USB device number 6 using xhci_hcd [ 17.622145] usb 3-6: unable to read config index 0 descriptor/all [ 17.622147] usb 3-6: can't read configurations, error -110 [ 17.742093] usb 3-6: new full-speed USB device number 7 using xhci_hcd [ 22.997715] usb 3-6: unable to read config index 0 descriptor/all [ 22.997716] usb 3-6: can't read configurations, error -110 Although it may work after several times unpluging/pluging: [ 68.195240] usb 3-6: new full-speed USB device number 11 using xhci_hcd [ 68.337459] usb 3-6: New USB device found, idVendor=1b1c, idProduct=1b20 [ 68.337463] usb 3-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 68.337466] usb 3-6: Product: Corsair STRAFE RGB Gaming Keyboard [ 68.337468] usb 3-6: Manufacturer: Corsair [ 68.337470] usb 3-6: SerialNumber: 0F013021AEB8046755A93ED3F5001941 Tried three quirks: USB_QUIRK_DELAY_INIT, USB_QUIRK_NO_LPM and USB_QUIRK_DEVICE_QUALIFIER, user confirmed that USB_QUIRK_DELAY_INIT alone can workaround this issue. Hence add the quirk for Corsair Strafe RGB. BugLink: https://bugs.launchpad.net/bugs/1678477Signed-off-by:
Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by:
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- 07 Sep, 2017 7 commits
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Greg Kroah-Hartman authored
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Stephan Mueller authored
commit 445a5827 upstream. For asynchronous operation, SGs are allocated without a page mapped to them or with a page that is not used (ref-counted). If the SGL is freed, the code must only call put_page for an SG if there was a page assigned and ref-counted in the first place. This fixes a kernel crash when using io_submit with more than one iocb using the sendmsg and sendpage (vmsplice/splice) interface. Signed-off-by:
Stephan Mueller <smueller@chronox.de> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Oleg Nesterov authored
commit 138e4ad6 upstream. The race was introduced by me in commit 971316f0 ("epoll: ep_unregister_pollwait() can use the freed pwq->whead"). I did not realize that nothing can protect eventpoll after ep_poll_callback() sets ->whead = NULL, only whead->lock can save us from the race with ep_free() or ep_remove(). Move ->whead = NULL to the end of ep_poll_callback() and add the necessary barriers. TODO: cleanup the ewake/EPOLLEXCLUSIVE logic, it was confusing even before this patch. Hopefully this explains use-after-free reported by syzcaller: BUG: KASAN: use-after-free in debug_spin_lock_before ... _raw_spin_lock_irqsave+0x4a/0x60 kernel/locking/spinlock.c:159 ep_poll_callback+0x29f/0xff0 fs/eventpoll.c:1148 this is spin_lock(eventpoll->lock), ... Freed by task 17774: ... kfree+0xe8/0x2c0 mm/slub.c:3883 ep_free+0x22c/0x2a0 fs/eventpoll.c:865 Fixes: 971316f0 ("epoll: ep_unregister_pollwait() can use the freed pwq->whead") Reported-by:
范龙飞 <long7573@126.com> Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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Suzuki K Poulose authored
commit 2952a607 upstream. Make sure we don't use a cached value of the KVM stage2 PGD while resetting the PGD. Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by:
Christoffer Dall <cdall@linaro.org> Signed-off-by:
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Suzuki K Poulose authored
commit 6c0d706b upstream. In kvm_free_stage2_pgd() we check the stage2 PGD before holding the lock and proceed to take the lock if it is valid. And we unmap the page tables, followed by releasing the lock. We reset the PGD only after dropping this lock, which could cause a race condition where another thread waiting on or even holding the lock, could potentially see that the PGD is still valid and proceed to perform a stage2 operation and later encounter a NULL PGD. [223090.242280] Unable to handle kernel NULL pointer dereference at virtual address 00000040 [223090.262330] PC is at unmap_stage2_range+0x8c/0x428 [223090.262332] LR is at kvm_unmap_hva_handler+0x2c/0x3c [223090.262531] Call trace: [223090.262533] [<ffff0000080adb78>] unmap_stage2_range+0x8c/0x428 [223090.262535] [<ffff0000080adf40>] kvm_unmap_hva_handler+0x2c/0x3c [223090.262537] [<ffff0000080ace2c>] handle_hva_to_gpa+0xb0/0x104 [223090.262539] [<ffff0000080af988>] kvm_unmap_hva+0x5c/0xbc [223090.262543] [<ffff0000080a2478>] kvm_mmu_notifier_invalidate_page+0x50/0x8c [223090.262547] [<ffff0000082274f8>] __mmu_notifier_invalidate_page+0x5c/0x84 [223090.262551] [<ffff00000820b700>] try_to_unmap_one+0x1d0/0x4a0 [223090.262553] [<ffff00000820c5c8>] rmap_walk+0x1cc/0x2e0 [223090.262555] [<ffff00000820c90c>] try_to_unmap+0x74/0xa4 [223090.262557] [<ffff000008230ce4>] migrate_pages+0x31c/0x5ac [223090.262561] [<ffff0000081f869c>] compact_zone+0x3fc/0x7ac [223090.262563] [<ffff0000081f8ae0>] compact_zone_order+0x94/0xb0 [223090.262564] [<ffff0000081f91c0>] try_to_compact_pages+0x108/0x290 [223090.262569] [<ffff0000081d5108>] __alloc_pages_direct_compact+0x70/0x1ac [223090.262571] [<ffff0000081d64a0>] __alloc_pages_nodemask+0x434/0x9f4 [223090.262572] [<ffff0000082256f0>] alloc_pages_vma+0x230/0x254 [223090.262574] [<ffff000008235e5c>] do_huge_pmd_anonymous_page+0x114/0x538 [223090.262576] [<ffff000008201bec>] handle_mm_fault+0xd40/0x17a4 [223090.262577] [<ffff0000081fb324>] __get_user_pages+0x12c/0x36c [223090.262578] [<ffff0000081fb804>] get_user_pages_unlocked+0xa4/0x1b8 [223090.262579] [<ffff0000080a3ce8>] __gfn_to_pfn_memslot+0x280/0x31c [223090.262580] [<ffff0000080a3dd0>] gfn_to_pfn_prot+0x4c/0x5c [223090.262582] [<ffff0000080af3f8>] kvm_handle_guest_abort+0x240/0x774 [223090.262584] [<ffff0000080b2bac>] handle_exit+0x11c/0x1ac [223090.262586] [<ffff0000080ab99c>] kvm_arch_vcpu_ioctl_run+0x31c/0x648 [223090.262587] [<ffff0000080a1d78>] kvm_vcpu_ioctl+0x378/0x768 [223090.262590] [<ffff00000825df5c>] do_vfs_ioctl+0x324/0x5a4 [223090.262591] [<ffff00000825e26c>] SyS_ioctl+0x90/0xa4 [223090.262595] [<ffff000008085d84>] el0_svc_naked+0x38/0x3c This patch moves the stage2 PGD manipulation under the lock. Reported-by:
Alexander Graf <agraf@suse.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Reviewed-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Xiangliang.Yu authored
commit 9afae271 upstream. When fail to get needed page for pool, need to put allocated pages into pool. But current code has a miscalculation of allocated pages, correct it. Signed-off-by:
Xiangliang.Yu <Xiangliang.Yu@amd.com> Reviewed-by:
Christian König <christian.koenig@amd.com> Reviewed-by:
Monk Liu <monk.liu@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Vladis Dronov authored
commit 7bab0963 upstream. The 'dir' parameter in xfrm_migrate() is a user-controlled byte which is used as an array index. This can lead to an out-of-bound access, kernel lockup and DoS. Add a check for the 'dir' value. This fixes CVE-2017-11600. References: https://bugzilla.redhat.com/show_bug.cgi?id=1474928 Fixes: 80c9abaa ("[XFRM]: Extension for dynamic update of endpoint address(es)") Reported-by:
"bo Zhang" <zhangbo5891001@gmail.com> Signed-off-by:
Vladis Dronov <vdronov@redhat.com> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
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