Re: upstream kernel crashes

[Guenter Roeck <linux@roeck-us.net>]

On Sun, Aug 14, 2022 at 03:47:44PM -0700, Linus Torvalds wrote:
> On Sun, Aug 14, 2022 at 3:37 PM Andres Freund <andres@anarazel.de> wrote:
> >
> > That range had different symptoms, I think (networking not working, but not
> > oopsing). I hit similar issues when tried to reproduce the issue
> > interactively, to produce more details, and unwisely did git pull instead of
> > checking out the precise revision, ending up with aea23e7c464b. That's when
> > symptoms look similar to the above.  So it'd be 69dac8e431af..aea23e7c464b
> > that I'd be more suspicious off in the context of this thread.
> 
> Ok.
> 
> > Which would make me look at the following first:
> > e140f731f980 Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
> > abe7a481aac9 Merge tag 'block-6.0-2022-08-12' of git://git.kernel.dk/linux-block
> > 1da8cf961bb1 Merge tag 'io_uring-6.0-2022-08-13' of git://git.kernel.dk/linux-block
> 
> All right, that maks sense.The reported oopses seem to be about block
> requests. Some of them were scsi in particular.
> 
> Let's bring in Jens and the SCSI people. Maybe that host reference
> counting? There's quite a lot of "move freeing around" in that late
> scsi pull, even if it was touted as "mostly small bug fixes and
> trivial updates".
> 

I may be wrong, but I don't think it is SCSI. The crashes are all over the
place. Here is another one that just came in. I can dig up more tomorrow.

Guenter

---
list_add corruption. next->prev should be prev (ffff8881401c0a00), but was ffff000000000000. (next=ffff88801fb50308).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:27
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 24 Comm: kdevtmpfs Not tainted 5.19.0-syzkaller-14374-g5d6a0f4da927 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__list_add_valid.cold+0xf/0x58 lib/list_debug.c:27
Code: 48 c7 c6 00 ec 48 8a 48 89 ef 49 c7 c7 ea ff ff ff e8 5b 63 05 00 e9 c2 7d b6 fa 4c 89 e1 48 c7 c7 a0 f2 48 8a e8 95 f2 f0 ff <0f> 0b 48 c7 c7 40 f2 48 8a e8 87 f2 f0 ff 0f 0b 48 c7 c7 a0 f1 48
RSP: 0018:ffffc900001efc10 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881401c0000 RCX: 0000000000000000
RDX: ffff888012620000 RSI: ffffffff8161f148 RDI: fffff5200003df74
RBP: ffff88801db8b588 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffff88801fb50308
R13: ffff88801fb50308 R14: ffff8881401c0000 R15: ffff88801db8b588
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 0000000000350ef0
Call Trace:
<TASK>
__list_add include/linux/list.h:69 [inline]
list_add include/linux/list.h:88 [inline]
inode_sb_list_add fs/inode.c:495 [inline]
new_inode+0x114/0x270 fs/inode.c:1049
shmem_get_inode+0x19b/0xe00 mm/shmem.c:2306
shmem_mknod+0x5a/0x1f0 mm/shmem.c:2873
vfs_mknod+0x4d2/0x7e0 fs/namei.c:3892
handle_create+0x340/0x4b3 drivers/base/devtmpfs.c:226
handle drivers/base/devtmpfs.c:391 [inline]
devtmpfs_work_loop drivers/base/devtmpfs.c:406 [inline]
devtmpfsd+0x1a4/0x2a3 drivers/base/devtmpfs.c:448
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid.cold+0xf/0x58 lib/list_debug.c:27
Code: 48 c7 c6 00 ec 48 8a 48 89 ef 49 c7 c7 ea ff ff ff e8 5b 63 05 00 e9 c2 7d b6 fa 4c 89 e1 48 c7 c7 a0 f2 48 8a e8 95 f2 f0 ff <0f> 0b 48 c7 c7 40 f2 48 8a e8 87 f2 f0 ff 0f 0b 48 c7 c7 a0 f1 48
RSP: 0018:ffffc900001efc10 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881401c0000 RCX: 0000000000000000
RDX: ffff888012620000 RSI: ffffffff8161f148 RDI: fffff5200003df74
RBP: ffff88801db8b588 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffff88801fb50308
R13: ffff88801fb50308 R14: ffff8881401c0000 R15: ffff88801db8b588
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 0000000000350ef0