bisecting fixing commit since e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b
building syzkaller on be5c2c81971442d623dd1b265dabf4644ceeb35b
testing commit e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b with gcc (GCC) 8.1.0
kernel signature: b7144a6da7191f7a80868672f8ff08e87ec6ecdf78625bdb7d16a6c52a87aa03
all runs: crashed: BUG: corrupted list in p9_read_work
testing current HEAD c6db52a88798e5a0dfef80041ad4d33cc8cf04eb
testing commit c6db52a88798e5a0dfef80041ad4d33cc8cf04eb with gcc (GCC) 8.1.0
kernel signature: ac5dfe304f6f4708d1463f92102bf5301f92dfa767fa51c9f5c9f269f65d5c19
all runs: crashed: BUG: corrupted list in p9_read_work
revisions tested: 2, total time: 26m34.299192781s (build: 17m18.117488207s, test: 8m43.667472471s)
the crash still happens on HEAD
commit msg: Linux 4.14.183
crash: BUG: corrupted list in p9_read_work
list_del corruption, ffff888078cbb628->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.183-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_read_work
task: ffff8880a9eca640 task.stack: ffff8880a9ed8000
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
RSP: 0018:ffff8880a9edfc68 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff888078cbb628 RCX: 0000000000000000
RDX: 000000000000004e RSI: ffffffff86cc2b40 RDI: ffffed10153dbf84
RBP: ffff8880a9edfc80 R08: ffff8880a9ecaf38 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff888078cbb600 R15: ffff88808e35acf8
FS:  0000000000000000(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000091944000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0x7b2/0x10a0 net/9p/trans_fd.c:386
 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2116
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250
 kthread+0x338/0x400 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 10 44 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 40 cf 03 87 e8 63 10 44 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 e0 ce 03 87 e8 4f 10 44 fe <0f> 0b 48 89 de 48 c7 c7 00 d0 03 87 e8 3e 10 44 fe 0f 0b 48 89 
RIP: __list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 RSP: ffff8880a9edfc68
---[ end trace 1aa77afc3f3f7dbe ]---