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* [syzbot] [io-uring?] kernel BUG in __io_remove_buffers
@ 2024-04-02 17:54 syzbot
  2024-04-02 18:53 ` Pavel Begunkov
  0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2024-04-02 17:54 UTC (permalink / raw)
  To: asml.silence, axboe, io-uring, linux-kernel, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    c0b832517f62 Add linux-next specific files for 20240402
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=12d5def9180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=afcaf46d374cec8c
dashboard link: https://syzkaller.appspot.com/bug?extid=beb5226eef6218124e9d
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1155ccc5180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14b06795180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0d36ec76edc7/disk-c0b83251.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6f9bb4e37dd0/vmlinux-c0b83251.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2349287b14b7/bzImage-c0b83251.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1135!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound io_ring_exit_work
RIP: 0010:put_page_testzero include/linux/mm.h:1135 [inline]
RIP: 0010:folio_put_testzero include/linux/mm.h:1141 [inline]
RIP: 0010:folio_put include/linux/mm.h:1508 [inline]
RIP: 0010:put_page include/linux/mm.h:1581 [inline]
RIP: 0010:__io_remove_buffers+0x8ee/0x8f0 io_uring/kbuf.c:196
Code: ff fb ff ff 48 c7 c7 3c 68 a9 8f e8 fc b6 56 fd e9 ee fb ff ff e8 12 dc f1 fc 48 89 ef 48 c7 c6 60 ff 1e 8c e8 13 20 3b fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
RSP: 0018:ffffc90000117830 EFLAGS: 00010246
RAX: 12798bbc5474ca00 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcad5c0 RDI: 0000000000000001
RBP: ffffea0000880c40 R08: ffffffff92f3a5ef R09: 1ffffffff25e74bd
R10: dffffc0000000000 R11: fffffbfff25e74be R12: 0000000000000008
R13: 0000000000000002 R14: ffff88802d20d280 R15: ffffea0000880c74
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200020c4 CR3: 000000007d97a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 io_put_bl io_uring/kbuf.c:229 [inline]
 io_destroy_buffers+0x14e/0x490 io_uring/kbuf.c:243
 io_ring_ctx_free+0x818/0xe70 io_uring/io_uring.c:2710
 io_ring_exit_work+0x7c7/0x850 io_uring/io_uring.c:2941
 process_one_work kernel/workqueue.c:3218 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3380
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:put_page_testzero include/linux/mm.h:1135 [inline]
RIP: 0010:folio_put_testzero include/linux/mm.h:1141 [inline]
RIP: 0010:folio_put include/linux/mm.h:1508 [inline]
RIP: 0010:put_page include/linux/mm.h:1581 [inline]
RIP: 0010:__io_remove_buffers+0x8ee/0x8f0 io_uring/kbuf.c:196
Code: ff fb ff ff 48 c7 c7 3c 68 a9 8f e8 fc b6 56 fd e9 ee fb ff ff e8 12 dc f1 fc 48 89 ef 48 c7 c6 60 ff 1e 8c e8 13 20 3b fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
RSP: 0018:ffffc90000117830 EFLAGS: 00010246
RAX: 12798bbc5474ca00 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcad5c0 RDI: 0000000000000001
RBP: ffffea0000880c40 R08: ffffffff92f3a5ef R09: 1ffffffff25e74bd
R10: dffffc0000000000 R11: fffffbfff25e74be R12: 0000000000000008
R13: 0000000000000002 R14: ffff88802d20d280 R15: ffffea0000880c74
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f31a71870f0 CR3: 000000007930c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [syzbot] [io-uring?] kernel BUG in __io_remove_buffers
  2024-04-02 17:54 [syzbot] [io-uring?] kernel BUG in __io_remove_buffers syzbot
@ 2024-04-02 18:53 ` Pavel Begunkov
  2024-04-02 19:37   ` Jens Axboe
  0 siblings, 1 reply; 5+ messages in thread
From: Pavel Begunkov @ 2024-04-02 18:53 UTC (permalink / raw)
  To: syzbot, axboe, io-uring, linux-kernel, syzkaller-bugs

On 4/2/24 18:54, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:

Got into spam again as with the last one, replying
just for folks to see.

> 
> HEAD commit:    c0b832517f62 Add linux-next specific files for 20240402
> git tree:       linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=12d5def9180000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=afcaf46d374cec8c
> dashboard link: https://syzkaller.appspot.com/bug?extid=beb5226eef6218124e9d
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1155ccc5180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14b06795180000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/0d36ec76edc7/disk-c0b83251.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6f9bb4e37dd0/vmlinux-c0b83251.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/2349287b14b7/bzImage-c0b83251.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
> 
>   ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
>   ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
> ------------[ cut here ]------------
> kernel BUG at include/linux/mm.h:1135!
> Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
> CPU: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> Workqueue: events_unbound io_ring_exit_work
> RIP: 0010:put_page_testzero include/linux/mm.h:1135 [inline]
> RIP: 0010:folio_put_testzero include/linux/mm.h:1141 [inline]
> RIP: 0010:folio_put include/linux/mm.h:1508 [inline]
> RIP: 0010:put_page include/linux/mm.h:1581 [inline]
> RIP: 0010:__io_remove_buffers+0x8ee/0x8f0 io_uring/kbuf.c:196
> Code: ff fb ff ff 48 c7 c7 3c 68 a9 8f e8 fc b6 56 fd e9 ee fb ff ff e8 12 dc f1 fc 48 89 ef 48 c7 c6 60 ff 1e 8c e8 13 20 3b fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
> RSP: 0018:ffffc90000117830 EFLAGS: 00010246
> RAX: 12798bbc5474ca00 RBX: 0000000000000000 RCX: 0000000000000001
> RDX: dffffc0000000000 RSI: ffffffff8bcad5c0 RDI: 0000000000000001
> RBP: ffffea0000880c40 R08: ffffffff92f3a5ef R09: 1ffffffff25e74bd
> R10: dffffc0000000000 R11: fffffbfff25e74be R12: 0000000000000008
> R13: 0000000000000002 R14: ffff88802d20d280 R15: ffffea0000880c74
> FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000200020c4 CR3: 000000007d97a000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>   <TASK>
>   io_put_bl io_uring/kbuf.c:229 [inline]
>   io_destroy_buffers+0x14e/0x490 io_uring/kbuf.c:243
>   io_ring_ctx_free+0x818/0xe70 io_uring/io_uring.c:2710
>   io_ring_exit_work+0x7c7/0x850 io_uring/io_uring.c:2941
>   process_one_work kernel/workqueue.c:3218 [inline]
>   process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299
>   worker_thread+0x86d/0xd70 kernel/workqueue.c:3380
>   kthread+0x2f0/0x390 kernel/kthread.c:388
>   ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
>   ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
>   </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:put_page_testzero include/linux/mm.h:1135 [inline]
> RIP: 0010:folio_put_testzero include/linux/mm.h:1141 [inline]
> RIP: 0010:folio_put include/linux/mm.h:1508 [inline]
> RIP: 0010:put_page include/linux/mm.h:1581 [inline]
> RIP: 0010:__io_remove_buffers+0x8ee/0x8f0 io_uring/kbuf.c:196
> Code: ff fb ff ff 48 c7 c7 3c 68 a9 8f e8 fc b6 56 fd e9 ee fb ff ff e8 12 dc f1 fc 48 89 ef 48 c7 c6 60 ff 1e 8c e8 13 20 3b fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
> RSP: 0018:ffffc90000117830 EFLAGS: 00010246
> RAX: 12798bbc5474ca00 RBX: 0000000000000000 RCX: 0000000000000001
> RDX: dffffc0000000000 RSI: ffffffff8bcad5c0 RDI: 0000000000000001
> RBP: ffffea0000880c40 R08: ffffffff92f3a5ef R09: 1ffffffff25e74bd
> R10: dffffc0000000000 R11: fffffbfff25e74be R12: 0000000000000008
> R13: 0000000000000002 R14: ffff88802d20d280 R15: ffffea0000880c74
> FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f31a71870f0 CR3: 000000007930c000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> 
> 
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at [email protected].
> 
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> 
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
> 
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
> 
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
> 
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
> 
> If you want to undo deduplication, reply with:
> #syz undup

-- 
Pavel Begunkov

^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [syzbot] [io-uring?] kernel BUG in __io_remove_buffers
  2024-04-02 18:53 ` Pavel Begunkov
@ 2024-04-02 19:37   ` Jens Axboe
  2024-04-03 23:03     ` syzbot
  0 siblings, 1 reply; 5+ messages in thread
From: Jens Axboe @ 2024-04-02 19:37 UTC (permalink / raw)
  To: Pavel Begunkov, syzbot, io-uring, linux-kernel, syzkaller-bugs

#syz test: git://git.kernel.dk/linux.git for-6.10/io_uring

-- 
Jens Axboe


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [syzbot] [io-uring?] kernel BUG in __io_remove_buffers
  2024-04-02 19:37   ` Jens Axboe
@ 2024-04-03 23:03     ` syzbot
  2024-04-06  2:08       ` Jens Axboe
  0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2024-04-03 23:03 UTC (permalink / raw)
  To: asml.silence, axboe, io-uring, linux-kernel, syzkaller-bugs

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

perboard
[    7.926982][    T1] usbcore: registered new interface driver dln2
[    7.928671][    T1] usbcore: registered new interface driver pn533_usb
[    7.935981][    T1] nfcsim 0.2 initialized
[    7.937582][    T1] usbcore: registered new interface driver port100
[    7.939440][    T1] usbcore: registered new interface driver nfcmrvl
[    7.947210][    T1] Loading iSCSI transport class v2.0-870.
[    7.968081][    T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[    7.978141][    T1] ------------[ cut here ]------------
[    7.979719][    T1] refcount_t: decrement hit 0; leaking memory.
[    7.981758][    T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[    7.984304][    T1] Modules linked in:
[    7.985206][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc2-syzkaller-00062-g25d658afbb9f #0
[    7.987566][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[    7.989580][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    7.991289][    T1] Code: b2 00 00 00 e8 67 f3 e9 fc 5b 5d c3 cc cc cc cc e8 5b f3 e9 fc c6 05 73 24 e8 0a 01 90 48 c7 c7 40 34 1f 8c e8 67 8e ac fc 90 <0f> 0b 90 90 eb d9 e8 3b f3 e9 fc c6 05 50 24 e8 0a 01 90 48 c7 c7
[    7.995319][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[    7.996425][    T1] RAX: 4d5c6abb0d962900 RBX: ffff8880215f782c RCX: ffff8880166d0000
[    7.998305][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[    7.999479][    T1] RBP: 0000000000000004 R08: ffffffff8157ffc2 R09: fffffbfff1c39af8
[    8.001772][    T1] R10: dffffc0000000000 R11: fffffbfff1c39af8 R12: ffffea000502cdc0
[    8.004141][    T1] R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
[    8.006063][    T1] FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[    8.007727][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.009976][    T1] CR2: ffff88823ffff000 CR3: 000000000e134000 CR4: 00000000003506f0
[    8.011700][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    8.013384][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    8.015782][    T1] Call Trace:
[    8.016883][    T1]  <TASK>
[    8.017827][    T1]  ? __warn+0x163/0x4e0
[    8.019345][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    8.021058][    T1]  ? report_bug+0x2b3/0x500
[    8.022280][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    8.024027][    T1]  ? handle_bug+0x3e/0x70
[    8.025284][    T1]  ? exc_invalid_op+0x1a/0x50
[    8.026551][    T1]  ? asm_exc_invalid_op+0x1a/0x20
[    8.027878][    T1]  ? __warn_printk+0x292/0x360
[    8.029272][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    8.030730][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
[    8.032217][    T1]  __free_pages_ok+0xc60/0xd90
[    8.033265][    T1]  make_alloc_exact+0xa3/0xf0
[    8.034312][    T1]  vring_alloc_queue_split+0x20a/0x600
[    8.035607][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    8.036997][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    8.038142][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    8.039207][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    8.040304][    T1]  ? really_probe+0x2b8/0xad0
[    8.041140][    T1]  ? driver_probe_device+0x50/0x430
[    8.042068][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    8.042973][    T1]  ? ret_from_fork+0x4b/0x80
[    8.044035][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    8.045362][    T1]  vring_create_virtqueue+0xca/0x110
[    8.046384][    T1]  ? __pfx_vp_notify+0x10/0x10
[    8.047405][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.048436][    T1]  setup_vq+0xe9/0x2d0
[    8.049363][    T1]  ? __pfx_vp_notify+0x10/0x10
[    8.050238][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.051200][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.053099][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.054362][    T1]  vp_setup_vq+0xbf/0x330
[    8.055098][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    8.056155][    T1]  ? ioread16+0x2f/0x90
[    8.057127][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.057929][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    8.058857][    T1]  vp_find_vqs+0x4c/0x4e0
[    8.059767][    T1]  virtscsi_init+0x8db/0xd00
[    8.060631][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    8.061568][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    8.062509][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    8.063697][    T1]  ? vp_get+0xfd/0x140
[    8.064484][    T1]  virtscsi_probe+0x3ea/0xf60
[    8.065484][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    8.066504][    T1]  ? kernfs_add_one+0x156/0x8b0
[    8.067579][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    8.069445][    T1]  ? virtio_features_ok+0x10c/0x270
[    8.070687][    T1]  virtio_dev_probe+0x991/0xaf0
[    8.071903][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    8.073120][    T1]  really_probe+0x2b8/0xad0
[    8.074086][    T1]  __driver_probe_device+0x1a2/0x390
[    8.075198][    T1]  driver_probe_device+0x50/0x430
[    8.076215][    T1]  __driver_attach+0x45f/0x710
[    8.077779][    T1]  ? __pfx___driver_attach+0x10/0x10
[    8.078838][    T1]  bus_for_each_dev+0x239/0x2b0
[    8.080219][    T1]  ? __pfx___driver_attach+0x10/0x10
[    8.081427][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    8.082648][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
[    8.084332][    T1]  bus_add_driver+0x347/0x620
[    8.085542][    T1]  driver_register+0x23a/0x320
[    8.086355][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.087517][    T1]  virtio_scsi_init+0x65/0xe0
[    8.088253][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.089537][    T1]  do_one_initcall+0x248/0x880
[    8.090403][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.091597][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    8.093212][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    8.094289][    T1]  ? __pfx_parse_args+0x10/0x10
[    8.095147][    T1]  ? do_initcalls+0x1c/0x80
[    8.096320][    T1]  ? rcu_is_watching+0x15/0xb0
[    8.097696][    T1]  do_initcall_level+0x157/0x210
[    8.098851][    T1]  do_initcalls+0x3f/0x80
[    8.099669][    T1]  kernel_init_freeable+0x435/0x5d0
[    8.100419][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    8.101767][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    8.103417][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.104551][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.105480][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.106672][    T1]  kernel_init+0x1d/0x2b0
[    8.107961][    T1]  ret_from_fork+0x4b/0x80
[    8.108943][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.109758][    T1]  ret_from_fork_asm+0x1a/0x30
[    8.111216][    T1]  </TASK>
[    8.111818][    T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    8.113547][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc2-syzkaller-00062-g25d658afbb9f #0
[    8.114525][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[    8.114525][    T1] Call Trace:
[    8.114525][    T1]  <TASK>
[    8.114525][    T1]  dump_stack_lvl+0x241/0x360
[    8.114525][    T1]  ? __pfx_dump_stack_lvl+0x10/0x10
[    8.114525][    T1]  ? __pfx__printk+0x10/0x10
[    8.114525][    T1]  ? _printk+0xd5/0x120
[    8.114525][    T1]  ? vscnprintf+0x5d/0x90
[    8.114525][    T1]  panic+0x349/0x860
[    8.124011][    T1]  ? __warn+0x172/0x4e0
[    8.124011][    T1]  ? __pfx_panic+0x10/0x10
[    8.124011][    T1]  ? show_trace_log_lvl+0x4e6/0x520
[    8.124011][    T1]  ? ret_from_fork_asm+0x1a/0x30
[    8.124011][    T1]  __warn+0x346/0x4e0
[    8.124011][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    8.124011][    T1]  report_bug+0x2b3/0x500
[    8.124011][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
[    8.124011][    T1]  handle_bug+0x3e/0x70
[    8.133902][    T1]  exc_invalid_op+0x1a/0x50
[    8.133902][    T1]  asm_exc_invalid_op+0x1a/0x20
[    8.133902][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[    8.133902][    T1] Code: b2 00 00 00 e8 67 f3 e9 fc 5b 5d c3 cc cc cc cc e8 5b f3 e9 fc c6 05 73 24 e8 0a 01 90 48 c7 c7 40 34 1f 8c e8 67 8e ac fc 90 <0f> 0b 90 90 eb d9 e8 3b f3 e9 fc c6 05 50 24 e8 0a 01 90 48 c7 c7
[    8.133902][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
[    8.133902][    T1] RAX: 4d5c6abb0d962900 RBX: ffff8880215f782c RCX: ffff8880166d0000
[    8.143997][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[    8.143997][    T1] RBP: 0000000000000004 R08: ffffffff8157ffc2 R09: fffffbfff1c39af8
[    8.143997][    T1] R10: dffffc0000000000 R11: fffffbfff1c39af8 R12: ffffea000502cdc0
[    8.143997][    T1] R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
[    8.143997][    T1]  ? __warn_printk+0x292/0x360
[    8.143997][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
[    8.143997][    T1]  __free_pages_ok+0xc60/0xd90
[    8.143997][    T1]  make_alloc_exact+0xa3/0xf0
[    8.153906][    T1]  vring_alloc_queue_split+0x20a/0x600
[    8.153906][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
[    8.153906][    T1]  ? vp_find_vqs+0x4c/0x4e0
[    8.153906][    T1]  ? virtscsi_probe+0x3ea/0xf60
[    8.153906][    T1]  ? virtio_dev_probe+0x991/0xaf0
[    8.153906][    T1]  ? really_probe+0x2b8/0xad0
[    8.153906][    T1]  ? driver_probe_device+0x50/0x430
[    8.153906][    T1]  vring_create_virtqueue_split+0xc6/0x310
[    8.153906][    T1]  ? ret_from_fork+0x4b/0x80
[    8.153906][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
[    8.163970][    T1]  vring_create_virtqueue+0xca/0x110
[    8.163970][    T1]  ? __pfx_vp_notify+0x10/0x10
[    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.163970][    T1]  setup_vq+0xe9/0x2d0
[    8.163970][    T1]  ? __pfx_vp_notify+0x10/0x10
[    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.173902][    T1]  vp_setup_vq+0xbf/0x330
[    8.173902][    T1]  ? __pfx_vp_config_changed+0x10/0x10
[    8.173902][    T1]  ? ioread16+0x2f/0x90
[    8.173902][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
[    8.173902][    T1]  vp_find_vqs_msix+0x8b2/0xc80
[    8.173902][    T1]  vp_find_vqs+0x4c/0x4e0
[    8.173902][    T1]  virtscsi_init+0x8db/0xd00
[    8.173902][    T1]  ? __pfx_virtscsi_init+0x10/0x10
[    8.173902][    T1]  ? __pfx_default_calc_sets+0x10/0x10
[    8.183960][    T1]  ? scsi_host_alloc+0xa57/0xea0
[    8.183960][    T1]  ? vp_get+0xfd/0x140
[    8.183960][    T1]  virtscsi_probe+0x3ea/0xf60
[    8.183960][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
[    8.183960][    T1]  ? kernfs_add_one+0x156/0x8b0
[    8.183960][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
[    8.183960][    T1]  ? virtio_features_ok+0x10c/0x270
[    8.193962][    T1]  virtio_dev_probe+0x991/0xaf0
[    8.193962][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
[    8.193962][    T1]  really_probe+0x2b8/0xad0
[    8.193962][    T1]  __driver_probe_device+0x1a2/0x390
[    8.193962][    T1]  driver_probe_device+0x50/0x430
[    8.193962][    T1]  __driver_attach+0x45f/0x710
[    8.193962][    T1]  ? __pfx___driver_attach+0x10/0x10
[    8.193962][    T1]  bus_for_each_dev+0x239/0x2b0
[    8.204004][    T1]  ? __pfx___driver_attach+0x10/0x10
[    8.204004][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
[    8.204004][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
[    8.204004][    T1]  bus_add_driver+0x347/0x620
[    8.204004][    T1]  driver_register+0x23a/0x320
[    8.204004][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.204004][    T1]  virtio_scsi_init+0x65/0xe0
[    8.204004][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.213923][    T1]  do_one_initcall+0x248/0x880
[    8.213923][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
[    8.213923][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    8.213923][    T1]  ? __pfx_do_one_initcall+0x10/0x10
[    8.213923][    T1]  ? __pfx_parse_args+0x10/0x10
[    8.213923][    T1]  ? do_initcalls+0x1c/0x80
[    8.213923][    T1]  ? rcu_is_watching+0x15/0xb0
[    8.223993][    T1]  do_initcall_level+0x157/0x210
[    8.223993][    T1]  do_initcalls+0x3f/0x80
[    8.223993][    T1]  kernel_init_freeable+0x435/0x5d0
[    8.223993][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
[    8.223993][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[    8.223993][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.223993][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.233955][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.233955][    T1]  kernel_init+0x1d/0x2b0
[    8.233955][    T1]  ret_from_fork+0x4b/0x80
[    8.233955][    T1]  ? __pfx_kernel_init+0x10/0x10
[    8.233955][    T1]  ret_from_fork_asm+0x1a/0x30
[    8.233955][    T1]  </TASK>
[    8.233955][    T1] Kernel Offset: disabled
[    8.233955][    T1] Rebooting in 86400 seconds..


syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1588439291=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 6baf50694
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6baf506947ba27ed9ce775cf9351cb0886166083 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240329-215124'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6baf506947ba27ed9ce775cf9351cb0886166083 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240329-215124'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6baf506947ba27ed9ce775cf9351cb0886166083 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240329-215124'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"6baf506947ba27ed9ce775cf9351cb0886166083\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=102c48de180000


Tested on:

commit:         25d658af io_uring/kbuf: remove dead define
git tree:       git://git.kernel.dk/linux.git for-6.10/io_uring
kernel config:  https://syzkaller.appspot.com/x/.config?x=51cdcd4a8f332569
dashboard link: https://syzkaller.appspot.com/bug?extid=beb5226eef6218124e9d
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.

^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [syzbot] [io-uring?] kernel BUG in __io_remove_buffers
  2024-04-03 23:03     ` syzbot
@ 2024-04-06  2:08       ` Jens Axboe
  0 siblings, 0 replies; 5+ messages in thread
From: Jens Axboe @ 2024-04-06  2:08 UTC (permalink / raw)
  To: syzbot, asml.silence, io-uring, linux-kernel, syzkaller-bugs

On 4/3/24 5:03 PM, syzbot wrote:
> Hello,
> 
> syzbot tried to test the proposed patch but the build/boot failed:
> 
> perboard
> [    7.926982][    T1] usbcore: registered new interface driver dln2
> [    7.928671][    T1] usbcore: registered new interface driver pn533_usb
> [    7.935981][    T1] nfcsim 0.2 initialized
> [    7.937582][    T1] usbcore: registered new interface driver port100
> [    7.939440][    T1] usbcore: registered new interface driver nfcmrvl
> [    7.947210][    T1] Loading iSCSI transport class v2.0-870.
> [    7.968081][    T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
> [    7.978141][    T1] ------------[ cut here ]------------
> [    7.979719][    T1] refcount_t: decrement hit 0; leaking memory.
> [    7.981758][    T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
> [    7.984304][    T1] Modules linked in:
> [    7.985206][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc2-syzkaller-00062-g25d658afbb9f #0
> [    7.987566][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> [    7.989580][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
> [    7.991289][    T1] Code: b2 00 00 00 e8 67 f3 e9 fc 5b 5d c3 cc cc cc cc e8 5b f3 e9 fc c6 05 73 24 e8 0a 01 90 48 c7 c7 40 34 1f 8c e8 67 8e ac fc 90 <0f> 0b 90 90 eb d9 e8 3b f3 e9 fc c6 05 50 24 e8 0a 01 90 48 c7 c7
> [    7.995319][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> [    7.996425][    T1] RAX: 4d5c6abb0d962900 RBX: ffff8880215f782c RCX: ffff8880166d0000
> [    7.998305][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [    7.999479][    T1] RBP: 0000000000000004 R08: ffffffff8157ffc2 R09: fffffbfff1c39af8
> [    8.001772][    T1] R10: dffffc0000000000 R11: fffffbfff1c39af8 R12: ffffea000502cdc0
> [    8.004141][    T1] R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> [    8.006063][    T1] FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> [    8.007727][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    8.009976][    T1] CR2: ffff88823ffff000 CR3: 000000000e134000 CR4: 00000000003506f0
> [    8.011700][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    8.013384][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [    8.015782][    T1] Call Trace:
> [    8.016883][    T1]  <TASK>
> [    8.017827][    T1]  ? __warn+0x163/0x4e0
> [    8.019345][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
> [    8.021058][    T1]  ? report_bug+0x2b3/0x500
> [    8.022280][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
> [    8.024027][    T1]  ? handle_bug+0x3e/0x70
> [    8.025284][    T1]  ? exc_invalid_op+0x1a/0x50
> [    8.026551][    T1]  ? asm_exc_invalid_op+0x1a/0x20
> [    8.027878][    T1]  ? __warn_printk+0x292/0x360
> [    8.029272][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
> [    8.030730][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
> [    8.032217][    T1]  __free_pages_ok+0xc60/0xd90
> [    8.033265][    T1]  make_alloc_exact+0xa3/0xf0
> [    8.034312][    T1]  vring_alloc_queue_split+0x20a/0x600
> [    8.035607][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
> [    8.036997][    T1]  ? vp_find_vqs+0x4c/0x4e0
> [    8.038142][    T1]  ? virtscsi_probe+0x3ea/0xf60
> [    8.039207][    T1]  ? virtio_dev_probe+0x991/0xaf0
> [    8.040304][    T1]  ? really_probe+0x2b8/0xad0
> [    8.041140][    T1]  ? driver_probe_device+0x50/0x430
> [    8.042068][    T1]  vring_create_virtqueue_split+0xc6/0x310
> [    8.042973][    T1]  ? ret_from_fork+0x4b/0x80
> [    8.044035][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
> [    8.045362][    T1]  vring_create_virtqueue+0xca/0x110
> [    8.046384][    T1]  ? __pfx_vp_notify+0x10/0x10
> [    8.047405][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.048436][    T1]  setup_vq+0xe9/0x2d0
> [    8.049363][    T1]  ? __pfx_vp_notify+0x10/0x10
> [    8.050238][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.051200][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.053099][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.054362][    T1]  vp_setup_vq+0xbf/0x330
> [    8.055098][    T1]  ? __pfx_vp_config_changed+0x10/0x10
> [    8.056155][    T1]  ? ioread16+0x2f/0x90
> [    8.057127][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.057929][    T1]  vp_find_vqs_msix+0x8b2/0xc80
> [    8.058857][    T1]  vp_find_vqs+0x4c/0x4e0
> [    8.059767][    T1]  virtscsi_init+0x8db/0xd00
> [    8.060631][    T1]  ? __pfx_virtscsi_init+0x10/0x10
> [    8.061568][    T1]  ? __pfx_default_calc_sets+0x10/0x10
> [    8.062509][    T1]  ? scsi_host_alloc+0xa57/0xea0
> [    8.063697][    T1]  ? vp_get+0xfd/0x140
> [    8.064484][    T1]  virtscsi_probe+0x3ea/0xf60
> [    8.065484][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
> [    8.066504][    T1]  ? kernfs_add_one+0x156/0x8b0
> [    8.067579][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
> [    8.069445][    T1]  ? virtio_features_ok+0x10c/0x270
> [    8.070687][    T1]  virtio_dev_probe+0x991/0xaf0
> [    8.071903][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
> [    8.073120][    T1]  really_probe+0x2b8/0xad0
> [    8.074086][    T1]  __driver_probe_device+0x1a2/0x390
> [    8.075198][    T1]  driver_probe_device+0x50/0x430
> [    8.076215][    T1]  __driver_attach+0x45f/0x710
> [    8.077779][    T1]  ? __pfx___driver_attach+0x10/0x10
> [    8.078838][    T1]  bus_for_each_dev+0x239/0x2b0
> [    8.080219][    T1]  ? __pfx___driver_attach+0x10/0x10
> [    8.081427][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
> [    8.082648][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
> [    8.084332][    T1]  bus_add_driver+0x347/0x620
> [    8.085542][    T1]  driver_register+0x23a/0x320
> [    8.086355][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.087517][    T1]  virtio_scsi_init+0x65/0xe0
> [    8.088253][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.089537][    T1]  do_one_initcall+0x248/0x880
> [    8.090403][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.091597][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [    8.093212][    T1]  ? __pfx_do_one_initcall+0x10/0x10
> [    8.094289][    T1]  ? __pfx_parse_args+0x10/0x10
> [    8.095147][    T1]  ? do_initcalls+0x1c/0x80
> [    8.096320][    T1]  ? rcu_is_watching+0x15/0xb0
> [    8.097696][    T1]  do_initcall_level+0x157/0x210
> [    8.098851][    T1]  do_initcalls+0x3f/0x80
> [    8.099669][    T1]  kernel_init_freeable+0x435/0x5d0
> [    8.100419][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
> [    8.101767][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [    8.103417][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.104551][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.105480][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.106672][    T1]  kernel_init+0x1d/0x2b0
> [    8.107961][    T1]  ret_from_fork+0x4b/0x80
> [    8.108943][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.109758][    T1]  ret_from_fork_asm+0x1a/0x30
> [    8.111216][    T1]  </TASK>
> [    8.111818][    T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
> [    8.113547][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc2-syzkaller-00062-g25d658afbb9f #0
> [    8.114525][    T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
> [    8.114525][    T1] Call Trace:
> [    8.114525][    T1]  <TASK>
> [    8.114525][    T1]  dump_stack_lvl+0x241/0x360
> [    8.114525][    T1]  ? __pfx_dump_stack_lvl+0x10/0x10
> [    8.114525][    T1]  ? __pfx__printk+0x10/0x10
> [    8.114525][    T1]  ? _printk+0xd5/0x120
> [    8.114525][    T1]  ? vscnprintf+0x5d/0x90
> [    8.114525][    T1]  panic+0x349/0x860
> [    8.124011][    T1]  ? __warn+0x172/0x4e0
> [    8.124011][    T1]  ? __pfx_panic+0x10/0x10
> [    8.124011][    T1]  ? show_trace_log_lvl+0x4e6/0x520
> [    8.124011][    T1]  ? ret_from_fork_asm+0x1a/0x30
> [    8.124011][    T1]  __warn+0x346/0x4e0
> [    8.124011][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
> [    8.124011][    T1]  report_bug+0x2b3/0x500
> [    8.124011][    T1]  ? refcount_warn_saturate+0xfa/0x1d0
> [    8.124011][    T1]  handle_bug+0x3e/0x70
> [    8.133902][    T1]  exc_invalid_op+0x1a/0x50
> [    8.133902][    T1]  asm_exc_invalid_op+0x1a/0x20
> [    8.133902][    T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
> [    8.133902][    T1] Code: b2 00 00 00 e8 67 f3 e9 fc 5b 5d c3 cc cc cc cc e8 5b f3 e9 fc c6 05 73 24 e8 0a 01 90 48 c7 c7 40 34 1f 8c e8 67 8e ac fc 90 <0f> 0b 90 90 eb d9 e8 3b f3 e9 fc c6 05 50 24 e8 0a 01 90 48 c7 c7
> [    8.133902][    T1] RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> [    8.133902][    T1] RAX: 4d5c6abb0d962900 RBX: ffff8880215f782c RCX: ffff8880166d0000
> [    8.143997][    T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [    8.143997][    T1] RBP: 0000000000000004 R08: ffffffff8157ffc2 R09: fffffbfff1c39af8
> [    8.143997][    T1] R10: dffffc0000000000 R11: fffffbfff1c39af8 R12: ffffea000502cdc0
> [    8.143997][    T1] R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> [    8.143997][    T1]  ? __warn_printk+0x292/0x360
> [    8.143997][    T1]  ? refcount_warn_saturate+0xf9/0x1d0
> [    8.143997][    T1]  __free_pages_ok+0xc60/0xd90
> [    8.143997][    T1]  make_alloc_exact+0xa3/0xf0
> [    8.153906][    T1]  vring_alloc_queue_split+0x20a/0x600
> [    8.153906][    T1]  ? __pfx_vring_alloc_queue_split+0x10/0x10
> [    8.153906][    T1]  ? vp_find_vqs+0x4c/0x4e0
> [    8.153906][    T1]  ? virtscsi_probe+0x3ea/0xf60
> [    8.153906][    T1]  ? virtio_dev_probe+0x991/0xaf0
> [    8.153906][    T1]  ? really_probe+0x2b8/0xad0
> [    8.153906][    T1]  ? driver_probe_device+0x50/0x430
> [    8.153906][    T1]  vring_create_virtqueue_split+0xc6/0x310
> [    8.153906][    T1]  ? ret_from_fork+0x4b/0x80
> [    8.153906][    T1]  ? __pfx_vring_create_virtqueue_split+0x10/0x10
> [    8.163970][    T1]  vring_create_virtqueue+0xca/0x110
> [    8.163970][    T1]  ? __pfx_vp_notify+0x10/0x10
> [    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.163970][    T1]  setup_vq+0xe9/0x2d0
> [    8.163970][    T1]  ? __pfx_vp_notify+0x10/0x10
> [    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.163970][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.173902][    T1]  vp_setup_vq+0xbf/0x330
> [    8.173902][    T1]  ? __pfx_vp_config_changed+0x10/0x10
> [    8.173902][    T1]  ? ioread16+0x2f/0x90
> [    8.173902][    T1]  ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [    8.173902][    T1]  vp_find_vqs_msix+0x8b2/0xc80
> [    8.173902][    T1]  vp_find_vqs+0x4c/0x4e0
> [    8.173902][    T1]  virtscsi_init+0x8db/0xd00
> [    8.173902][    T1]  ? __pfx_virtscsi_init+0x10/0x10
> [    8.173902][    T1]  ? __pfx_default_calc_sets+0x10/0x10
> [    8.183960][    T1]  ? scsi_host_alloc+0xa57/0xea0
> [    8.183960][    T1]  ? vp_get+0xfd/0x140
> [    8.183960][    T1]  virtscsi_probe+0x3ea/0xf60
> [    8.183960][    T1]  ? __pfx_virtscsi_probe+0x10/0x10
> [    8.183960][    T1]  ? kernfs_add_one+0x156/0x8b0
> [    8.183960][    T1]  ? virtio_no_restricted_mem_acc+0x9/0x10
> [    8.183960][    T1]  ? virtio_features_ok+0x10c/0x270
> [    8.193962][    T1]  virtio_dev_probe+0x991/0xaf0
> [    8.193962][    T1]  ? __pfx_virtio_dev_probe+0x10/0x10
> [    8.193962][    T1]  really_probe+0x2b8/0xad0
> [    8.193962][    T1]  __driver_probe_device+0x1a2/0x390
> [    8.193962][    T1]  driver_probe_device+0x50/0x430
> [    8.193962][    T1]  __driver_attach+0x45f/0x710
> [    8.193962][    T1]  ? __pfx___driver_attach+0x10/0x10
> [    8.193962][    T1]  bus_for_each_dev+0x239/0x2b0
> [    8.204004][    T1]  ? __pfx___driver_attach+0x10/0x10
> [    8.204004][    T1]  ? __pfx_bus_for_each_dev+0x10/0x10
> [    8.204004][    T1]  ? do_raw_spin_unlock+0x13c/0x8b0
> [    8.204004][    T1]  bus_add_driver+0x347/0x620
> [    8.204004][    T1]  driver_register+0x23a/0x320
> [    8.204004][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.204004][    T1]  virtio_scsi_init+0x65/0xe0
> [    8.204004][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.213923][    T1]  do_one_initcall+0x248/0x880
> [    8.213923][    T1]  ? __pfx_virtio_scsi_init+0x10/0x10
> [    8.213923][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [    8.213923][    T1]  ? __pfx_do_one_initcall+0x10/0x10
> [    8.213923][    T1]  ? __pfx_parse_args+0x10/0x10
> [    8.213923][    T1]  ? do_initcalls+0x1c/0x80
> [    8.213923][    T1]  ? rcu_is_watching+0x15/0xb0
> [    8.223993][    T1]  do_initcall_level+0x157/0x210
> [    8.223993][    T1]  do_initcalls+0x3f/0x80
> [    8.223993][    T1]  kernel_init_freeable+0x435/0x5d0
> [    8.223993][    T1]  ? __pfx_kernel_init_freeable+0x10/0x10
> [    8.223993][    T1]  ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [    8.223993][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.223993][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.233955][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.233955][    T1]  kernel_init+0x1d/0x2b0
> [    8.233955][    T1]  ret_from_fork+0x4b/0x80
> [    8.233955][    T1]  ? __pfx_kernel_init+0x10/0x10
> [    8.233955][    T1]  ret_from_fork_asm+0x1a/0x30
> [    8.233955][    T1]  </TASK>
> [    8.233955][    T1] Kernel Offset: disabled
> [    8.233955][    T1] Rebooting in 86400 seconds..

This doesn't look related at all.

-- 
Jens Axboe


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2024-04-06  2:08 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-04-02 17:54 [syzbot] [io-uring?] kernel BUG in __io_remove_buffers syzbot
2024-04-02 18:53 ` Pavel Begunkov
2024-04-02 19:37   ` Jens Axboe
2024-04-03 23:03     ` syzbot
2024-04-06  2:08       ` Jens Axboe

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