syzbot


BUG: corrupted list in p9_conn_cancel (3)

Status: auto-obsoleted due to no activity on 2023/11/14 18:11
Subsystems: v9fs
[Documentation on labels]
Reported-by: syzbot+89072f8981ab66c1cc76@syzkaller.appspotmail.com
First crash: 276d, last: 276d
Discussions (1)
Title Replies (including bot) Last reply
Re: [syzbot] general protection fault in rose_transmit_link (3) 1 (1) 2023/12/13 13:55
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: corrupted list in p9_conn_cancel (2) v9fs 1 465d 461d 0/26 auto-obsoleted due to no activity on 2023/05/08 23:23
linux-4.14 BUG: corrupted list in p9_conn_cancel syz error 5 1441d 1691d 0/1 upstream: reported syz repro on 2019/10/01 03:22
upstream BUG: corrupted list in p9_conn_cancel v9fs C done 18 2039d 2140d 13/26 fixed on 2019/11/11 16:48

Sample crash report:
list_del corruption. next->prev should be ffff888025992a50, but was ffffc9000498fba0. (next=ffffc9000498fba0)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:62!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5078 Comm: kworker/0:3 Not tainted 6.5.0-rc6-syzkaller-00036-g4853c74bd7ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events p9_read_work
RIP: 0010:__list_del_entry_valid+0x133/0x1b0 lib/list_debug.c:62
Code: e8 f2 00 46 fd 0f 0b 48 89 c2 48 c7 c7 60 16 c8 8a e8 e1 00 46 fd 0f 0b 48 89 d1 48 c7 c7 e0 16 c8 8a 48 89 c2 e8 cd 00 46 fd <0f> 0b 48 89 34 24 e8 62 ab b6 fd 48 8b 34 24 e9 e3 fe ff ff 48 89
RSP: 0018:ffffc9000498fb30 EFLAGS: 00010282
RAX: 000000000000006d RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816a0060 RDI: 0000000000000005
RBP: ffff888025992990 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff888015eb57c0
R13: ffff888015eb5810 R14: ffffc9000498fae0 R15: ffff888025992a50
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 0000000035514000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 p9_conn_cancel+0x6b2/0x910 net/9p/trans_fd.c:215
 p9_read_work+0x4d8/0xfb0 net/9p/trans_fd.c:407
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0x133/0x1b0 lib/list_debug.c:62
Code: e8 f2 00 46 fd 0f 0b 48 89 c2 48 c7 c7 60 16 c8 8a e8 e1 00 46 fd 0f 0b 48 89 d1 48 c7 c7 e0 16 c8 8a 48 89 c2 e8 cd 00 46 fd <0f> 0b 48 89 34 24 e8 62 ab b6 fd 48 8b 34 24 e9 e3 fe ff ff 48 89
RSP: 0018:ffffc9000498fb30 EFLAGS: 00010282
RAX: 000000000000006d RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816a0060 RDI: 0000000000000005
RBP: ffff888025992990 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff888015eb57c0
R13: ffff888015eb5810 R14: ffffc9000498fae0 R15: ffff888025992a50
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f064ff665e8 CR3: 0000000042368000 CR4: 0000000000350ef0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/16 18:11 upstream 4853c74bd7ab 7773e940 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root BUG: corrupted list in p9_conn_cancel
* Struck through repros no longer work on HEAD.