Re: [PATCH 6.6 000/396] 6.6.24-rc1 review

Naresh Kamboju
2024-04-01T19:01:41Z

On Mon, 1 Apr 2024 at 22:06, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.6.24 release.
> There are 396 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 03 Apr 2024 15:24:46 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.24-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Following kernel warnings have been noticed on qemu-x86_64 while running LTP
cve ioctl_sg01 tests the kernel with stable-rc 6.6.24-rc1, 6.7.12-rc1 and
6.8.3-rc1.

We have started bi-secting this issue.
Always reproduced.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

ioctl_sg01.c:81: TINFO: Found SCSI device /dev/sg0
------------[ cut here ]------------
[ 36.606841] WARNING: CPU: 0 PID: 8 at drivers/scsi/sg.c:2237
sg_remove_sfp_usercontext+0x145/0x150
[ 36.609445] Modules linked in:
[ 36.610793] CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.6.24-rc1 #1
[ 36.611568] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
[ 36.612872] Workqueue: events sg_remove_sfp_usercontext
[ 36.613691] RIP: 0010:sg_remove_sfp_usercontext+0x145/0x150

<trim>

[ 36.621539] Call Trace:
[ 36.621953] <TASK>
[ 36.622444] ? show_regs+0x69/0x80
[ 36.622819] ? __warn+0x8d/0x150
[ 36.623078] ? sg_remove_sfp_usercontext+0x145/0x150
[ 36.623558] ? report_bug+0x171/0x1a0
[ 36.623881] ? handle_bug+0x42/0x80
[ 36.624070] ? exc_invalid_op+0x1c/0x70
[ 36.624491] ? asm_exc_invalid_op+0x1f/0x30
[ 36.624897] ? sg_remove_sfp_usercontext+0x145/0x150
[ 36.625408] process_one_work+0x141/0x300
[ 36.625769] worker_thread+0x2f6/0x430
[ 36.626073] ? __pfx_worker_thread+0x10/0x10
[ 36.626529] kthread+0x105/0x140
[ 36.626778] ? __pfx_kthread+0x10/0x10
[ 36.627059] ret_from_fork+0x41/0x60
[ 36.627441] ? __pfx_kthread+0x10/0x10
[ 36.627735] ret_from_fork_asm+0x1b/0x30
[ 36.628293] </TASK>
[ 36.628604] ---[ end trace 0000000000000000 ]---
ioctl_sg01.c:122: TPASS: Output buffer is empty, no data leaked

Suspecting commit:
-----
scsi: sg: Avoid sg device teardown race
commit 27f58c04a8f438078583041468ec60597841284d upstream.

+ WARN_ON_ONCE(kref_read(&sdp->d_ref) != 1);

Steps to reproduce:
- https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eVWFlAeOUepfeFVkrOXFYNNAqI/reproducer

Links:
- https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.23-397-g75a2533b74d0/testrun/23255318/suite/log-parser-test/tests/
- https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eVTitwVMagaiWhs5T2iKH390D5

--
Linaro LKFT