syzbot

 sign-in | mailing list | source | docs
🐞 Open [712]
🐞 Fixed [297]
🐞 Invalid [838]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

BUG: corrupted list in p9_fd_cancelled (4)

Status: upstream: reported on 2023/01/27 06:50
Reported-by: syzbot+8c3250776dd0ec1b64bc@syzkaller.appspotmail.com
First crash: 937d, last: 937d
▶ ▼ Similar bugs (22)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: corrupted list in p9_fd_cancelled 8 1 1355d 1355d 0/2 closed as invalid on 2022/03/01 11:24
upstream BUG: corrupted list in p9_fd_cancelled (2) v9fs 8 syz error error 273 528d 2184d 0/29 auto-obsoleted due to no activity on 2024/06/03 04:59
linux-5.15 BUG: corrupted list in p9_fd_cancelled (2) 8 4 630d 715d 0/3 auto-obsoleted due to no activity on 2024/03/09 04:25
linux-4.14 BUG: corrupted list in p9_fd_cancelled 8 syz done 2 2088d 2134d 1/1 fixed on 2020/01/03 09:37
android-6-1 BUG: corrupted list in p9_fd_cancelled 8 27 455d 827d 0/2 auto-obsoleted due to no activity on 2024/08/20 17:39
android-5-10 BUG: corrupted list in p9_fd_cancelled (2) 8 3 1228d 1263d 0/2 auto-closed as invalid on 2022/07/10 10:51
android-6-1 BUG: corrupted list in p9_fd_cancelled (2) 8 syz error 13 58d 355d 0/2 premoderation: reported syz repro on 2024/08/31 06:31
android-54 BUG: corrupted list in p9_fd_cancelled 8 3 1516d 1724d 0/2 auto-closed as invalid on 2021/10/25 12:29
linux-5.15 BUG: corrupted list in p9_fd_cancelled (3) origin:lts-only 8 syz 2 284d 343d 0/3 auto-obsoleted due to no activity on 2025/02/17 18:13
linux-4.19 BUG: corrupted list in p9_fd_cancelled 8 syz done 2 2108d 2171d 1/1 fixed on 2019/12/18 17:42
linux-6.1 BUG: corrupted list in p9_fd_cancelled 8 56 509d 893d 0/3 auto-obsoleted due to no activity on 2024/07/04 11:58
linux-6.1 BUG: corrupted list in p9_fd_cancelled (2) 8 1 340d 340d 0/3 auto-obsoleted due to no activity on 2024/12/24 10:47
android-5-15 BUG: corrupted list in p9_fd_cancelled origin:upstream missing-backport 8 syz done error 30 209d 935d 0/2 auto-obsoleted due to no activity on 2025/04/23 20:43
upstream BUG: corrupted list in p9_fd_cancelled v9fs 8 16 2492d 2592d 0/29 auto-closed as invalid on 2019/04/23 06:51
android-5-15 BUG: corrupted list in p9_fd_cancelled (2) 8 1 85d 85d 0/2 premoderation: reported on 2025/05/27 13:45
linux-4.19 BUG: corrupted list in p9_fd_cancelled (3) 8 1 1323d 1323d 0/1 auto-closed as invalid on 2022/05/05 22:32
linux-5.15 BUG: corrupted list in p9_fd_cancelled 8 1 880d 880d 0/3 auto-obsoleted due to no activity on 2023/07/23 04:06
android-54 BUG: corrupted list in p9_fd_cancelled (2) 8 syz 25 502d 1366d 0/2 auto-obsoleted due to no activity on 2024/07/14 15:48
upstream BUG: corrupted list in p9_fd_cancelled (3) v9fs 8 16 20d 341d 0/29 upstream: reported on 2024/09/14 04:00
android-5-10 BUG: corrupted list in p9_fd_cancelled (4) 8 4 330d 440d 0/2 auto-obsoleted due to no activity on 2024/12/24 01:20
linux-4.19 BUG: corrupted list in p9_fd_cancelled (2) 8 1 1637d 1637d 0/1 auto-closed as invalid on 2021/06/25 15:45
android-5-10 BUG: corrupted list in p9_fd_cancelled (3) 8 C done unreliable 38 570d 655d 0/2 auto-obsoleted due to no activity on 2024/05/07 18:52

Sample crash report:
overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off.
overlayfs: upper fs does not support tmpfile.
list_del corruption, ffff88808d0e4fb0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 24022 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a lib/list_debug.c:45
Code: e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 e0 e3 b3 88 e8 d8 42 f7 ff 0f 0b
RSP: 0018:ffff8880a21876b0 EFLAGS: 00010286
RAX: 000000000000004e RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1014430ec8
RBP: ffff88808d0e4fb0 R08: 000000000000004e R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff88808d0e4fb8 R15: ffffffff87c31bd0
FS:  00007fd7f128c700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd7f1208718 CR3: 000000004524a000 CR4: 00000000003406f0
DR0: 0080ffff00000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_fd_cancelled+0x71/0x230 net/9p/trans_fd.c:737
 p9_client_flush+0x397/0x490 net/9p/client.c:690
 p9_client_rpc+0x1203/0x1440 net/9p/client.c:797
 p9_client_version net/9p/client.c:968 [inline]
 p9_client_create+0xa88/0x12e0 net/9p/client.c:1068
 v9fs_session_init+0x1dd/0x1770 fs/9p/v9fs.c:421
 v9fs_mount+0x73/0x910 fs/9p/vfs_super.c:135
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fd7f2d9e0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd7f128c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd7f2ebe2c0 RCX: 00007fd7f2d9e0c9
RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00007fd7f2df9ae9 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6e10a2df R14: 00007fd7f128c300 R15: 0000000000022000
Modules linked in:
---[ end trace cd27a6468ed388ea ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a lib/list_debug.c:45
Code: e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 e0 e3 b3 88 e8 d8 42 f7 ff 0f 0b
RSP: 0018:ffff8880a21876b0 EFLAGS: 00010286
RAX: 000000000000004e RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1014430ec8
RBP: ffff88808d0e4fb0 R08: 000000000000004e R09: 0000000000000000
overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off.
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff88808d0e4fb8 R15: ffffffff87c31bd0
FS:  00007fd7f128c700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd7f1208718 CR3: 000000004524a000 CR4: 00000000003406f0
DR0: 0080ffff00000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/27 06:50 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: corrupted list in p9_fd_cancelled
* Struck through repros no longer work on HEAD.