syzbot
WARNING in v9fs_begin_writeback
Status:
upstream: reported C repro on 2024/08/06 09:45
Subsystems:
v9fs
[Documentation on labels]
Reported-by: syzbot+0b74d367d6e80661d6df@syzkaller.appspotmail.com
First crash: 723d, last: 9d07h
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✨ AI Jobs (7)
| ID |
Workflow |
Result |
Correct |
Bug |
Created |
Started |
Finished |
Revision |
Error |
| 2cff3fa1 |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/07/05 05:27 |
2026/07/05 05:27 |
2026/07/05 05:57 |
93f57954 |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| f4178bfb |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/06/18 04:54 |
2026/06/18 04:54 |
2026/06/18 05:19 |
b62b3ded |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| 6c4e1807 |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/06/10 00:49 |
2026/06/10 00:49 |
2026/06/10 01:13 |
c36c07f6 |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| 7b4d226d |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/06/04 03:04 |
2026/06/04 03:04 |
2026/06/04 03:22 |
62fe1528 |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| 29455480 |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/06/01 17:52 |
2026/06/01 17:52 |
2026/06/01 18:20 |
386cc6da |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| 75a89fc8 |
assessment-security |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/05/17 07:51 |
2026/05/17 07:51 |
2026/05/17 08:22 |
de5aae85 |
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/32a8d5205daf7ef7ff...
truncated to first 200 bytes; open job for full error
|
| 2814e454 |
patching |
|
💥 |
WARNING in v9fs_begin_writeback |
2026/05/10 09:19 |
2026/05/10 13:05 |
2026/05/10 13:29 |
29233ece |
reproducer did not crash
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Last patch testing requests (46)
Sample crash report:
------------[ cut here ]------------
folio expected an open fid inode->i_ino=23005ff
WARNING: CPU: 2 PID: 1155 at fs/9p/vfs_addr.c:39 v9fs_begin_writeback fs/9p/vfs_addr.c:39 [inline]
WARNING: CPU: 2 PID: 1155 at fs/9p/vfs_addr.c:39 v9fs_begin_writeback+0x210/0x280 fs/9p/vfs_addr.c:33
Modules linked in:
CPU: 2 UID: 0 PID: 1155 Comm: kworker/u32:9 Not tainted 6.11.0-rc1-syzkaller-00154-gc0ecd6388360 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: writeback wb_workfn (flush-9p-55)
RIP: 0010:v9fs_begin_writeback fs/9p/vfs_addr.c:39 [inline]
RIP: 0010:v9fs_begin_writeback+0x210/0x280 fs/9p/vfs_addr.c:33
Code: 00 fc ff df 48 8b 5b 48 48 8d 7b 40 48 89 fa 48 c1 ea 03 80 3c 02 00 75 66 48 8b 73 40 48 c7 c7 20 9a 8e 8b e8 51 4a 0d fe 90 <0f> 0b 90 90 e9 62 ff ff ff e8 32 2b a8 fe e9 51 ff ff ff e8 98 2a
RSP: 0018:ffffc9000610f480 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880327a0670 RCX: ffffffff814cc379
RDX: ffff88802329a440 RSI: ffffffff814cc386 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888012c4a408
R13: dffffc0000000000 R14: ffffc9000610f840 R15: ffff888012c4a658
FS: 0000000000000000(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 0000000011d46000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
netfs_writepages+0x656/0xde0 fs/netfs/write_issue.c:534
do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683
__writeback_single_inode+0x163/0xf90 fs/fs-writeback.c:1651
writeback_sb_inodes+0x611/0x1150 fs/fs-writeback.c:1947
wb_writeback+0x199/0xb50 fs/fs-writeback.c:2127
wb_do_writeback fs/fs-writeback.c:2274 [inline]
wb_workfn+0x28d/0xf40 fs/fs-writeback.c:2314
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Struck through repros no longer work on HEAD.