syzbot


BUG: corrupted list in p9_fd_cancelled (3)

Status: moderation: reported on 2024/06/22 02:35
Subsystems: v9fs
[Documentation on labels]
Reported-by: syzbot+ae38637037fe9021935a@syzkaller.appspotmail.com
First crash: 31d, last: 31d
Similar bugs (18)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: corrupted list in p9_fd_cancelled 1 956d 956d 0/2 closed as invalid on 2022/03/01 11:24
upstream BUG: corrupted list in p9_fd_cancelled (2) v9fs syz error error 273 130d 1786d 0/27 auto-obsoleted due to no activity on 2024/06/03 04:59
linux-5.15 BUG: corrupted list in p9_fd_cancelled (2) 4 232d 317d 0/3 auto-obsoleted due to no activity on 2024/03/09 04:25
linux-4.14 BUG: corrupted list in p9_fd_cancelled syz done 2 1690d 1736d 1/1 fixed on 2020/01/03 09:37
android-6-1 BUG: corrupted list in p9_fd_cancelled 27 57d 429d 0/2 premoderation: reported on 2023/05/16 17:03
android-5-10 BUG: corrupted list in p9_fd_cancelled (2) 3 829d 865d 0/2 auto-closed as invalid on 2022/07/10 10:51
android-54 BUG: corrupted list in p9_fd_cancelled 3 1117d 1326d 0/2 auto-closed as invalid on 2021/10/25 12:29
linux-4.19 BUG: corrupted list in p9_fd_cancelled syz done 2 1710d 1772d 1/1 fixed on 2019/12/18 17:42
linux-6.1 BUG: corrupted list in p9_fd_cancelled 56 111d 495d 0/3 auto-obsoleted due to no activity on 2024/07/04 11:58
android-5-15 BUG: corrupted list in p9_fd_cancelled origin:upstream missing-backport syz done 29 5d00h 537d 0/2 premoderation: reported syz repro on 2023/01/29 05:13
upstream BUG: corrupted list in p9_fd_cancelled v9fs 16 2094d 2194d 0/27 auto-closed as invalid on 2019/04/23 06:51
linux-4.19 BUG: corrupted list in p9_fd_cancelled (3) 1 925d 925d 0/1 auto-closed as invalid on 2022/05/05 22:32
linux-5.15 BUG: corrupted list in p9_fd_cancelled 1 482d 482d 0/3 auto-obsoleted due to no activity on 2023/07/23 04:06
android-54 BUG: corrupted list in p9_fd_cancelled (2) syz 25 104d 968d 0/2 auto-obsoleted due to no activity on 2024/07/14 15:48
android-5-10 BUG: corrupted list in p9_fd_cancelled (4) 2 21d 42d 0/2 premoderation: reported on 2024/06/07 05:15
linux-4.19 BUG: corrupted list in p9_fd_cancelled (4) 1 539d 539d 0/1 upstream: reported on 2023/01/27 06:50
linux-4.19 BUG: corrupted list in p9_fd_cancelled (2) 1 1239d 1239d 0/1 auto-closed as invalid on 2021/06/25 15:45
android-5-10 BUG: corrupted list in p9_fd_cancelled (3) C done unreliable 38 172d 257d 0/2 auto-obsoleted due to no activity on 2024/05/07 18:52

Sample crash report:
list_del corruption, ffff88802be3c830->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:56!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 3 PID: 6698 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__list_del_entry_valid_or_report+0x108/0x1c0 lib/list_debug.c:56
Code: c7 c7 80 c9 8f 8b e8 47 2f e9 fc 90 0f 0b 48 c7 c7 e0 c9 8f 8b e8 38 2f e9 fc 90 0f 0b 48 c7 c7 40 ca 8f 8b e8 29 2f e9 fc 90 <0f> 0b 48 89 ca 48 c7 c7 a0 ca 8f 8b e8 17 2f e9 fc 90 0f 0b 48 89
RSP: 0018:ffffc90002e676c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88802be3c770 RCX: ffffffff816f41b9
RDX: 0000000000000000 RSI: ffffffff816fcdb6 RDI: 0000000000000005
RBP: ffff8880258be800 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804bd9b830
R13: 0000000000000005 R14: ffff88802be3c830 R15: ffff88802be3c838
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea2b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c00123e01c CR3: 000000004badc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 p9_fd_cancelled+0xa2/0x2a0 net/9p/trans_fd.c:736
 p9_client_flush.isra.0+0x34b/0x420 net/9p/client.c:618
 p9_client_rpc+0xaef/0xc10 net/9p/client.c:741
 p9_client_version net/9p/client.c:930 [inline]
 p9_client_create+0xc03/0x11b0 net/9p/client.c:1034
 v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
 v9fs_mount+0xc6/0xaa0 fs/9p/vfs_super.c:122
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1780
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x6e1/0x1f10 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72f2579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ea25ac EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000000
RDX: 0000000020000200 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x108/0x1c0 lib/list_debug.c:56
Code: c7 c7 80 c9 8f 8b e8 47 2f e9 fc 90 0f 0b 48 c7 c7 e0 c9 8f 8b e8 38 2f e9 fc 90 0f 0b 48 c7 c7 40 ca 8f 8b e8 29 2f e9 fc 90 <0f> 0b 48 89 ca 48 c7 c7 a0 ca 8f 8b e8 17 2f e9 fc 90 0f 0b 48 89
RSP: 0018:ffffc90002e676c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88802be3c770 RCX: ffffffff816f41b9
RDX: 0000000000000000 RSI: ffffffff816fcdb6 RDI: 0000000000000005
RBP: ffff8880258be800 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804bd9b830
R13: 0000000000000005 R14: ffff88802be3c830 R15: ffff88802be3c838
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea2b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c00123e01c CR3: 000000004badc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/18 02:30 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: corrupted list in p9_fd_cancelled
* Struck through repros no longer work on HEAD.