syzbot


general protection fault in wait_consider_task

Status: auto-closed as invalid on 2020/09/02 23:50
Reported-by: syzbot+8d86d142f63b8950336a@syzkaller.appspotmail.com
First crash: 810d, last: 784d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in wait_consider_task 3 638d 798d 0/22 auto-closed as invalid on 2021/01/27 15:56
linux-4.19 general protection fault in wait_consider_task C done 5 1004d 1010d 1/1 fixed on 2019/12/10 03:52
linux-4.19 general protection fault in wait_consider_task (2) C error 1 602d 662d 0/1 upstream: reported C repro on 2020/09/04 22:53
linux-4.14 general protection fault in wait_consider_task (2) 1 569d 569d 0/1 auto-closed as invalid on 2021/04/06 02:34

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6343 Comm: syz-executor.5 Not tainted 4.14.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805e4c0080 task.stack: ffff88805e4c8000
RIP: 0010:wait_consider_task+0x80/0x3030 kernel/exit.c:1329
RSP: 0018:ffff88805e4cfb30 EFLAGS: 00010206
RAX: 00ee0eeee0ee0edd RBX: 0000000000000000 RCX: 07707777077076eb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88805e4cfd08
RBP: dffffc0000000000 R08: 0000000000000ec1 R09: ffffffff8a066e48
R10: ffff88805e4c0908 R11: ffff88805e4c0080 R12: ffff88805e4cfd08
R13: 077077770770726f R14: 077077770770726f R15: ffff88805e4cfd08
FS:  0000000001b21940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000514ae0 CR3: 000000005e490000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1438 [inline]
 do_wait+0x3e9/0x930 kernel/exit.c:1509
 kernel_wait4+0x103/0x1e0 kernel/exit.c:1652
 SYSC_wait4+0x106/0x110 kernel/exit.c:1664
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4166ca
RSP: 002b:00007ffdc7bf1e78 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000001f37ca RCX: 00000000004166ca
RDX: 0000000040000001 RSI: 00007ffdc7bf1eb0 RDI: ffffffffffffffff
RBP: 0000000000002242 R08: 0000000000000001 R09: 0000000001b21940
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000f
R13: 00007ffdc7bf1eb0 R14: 00000000001f3493 R15: 00007ffdc7bf1ec0
Code: 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 00 f3 f3 f3 e8 b3 b0 23 00 49 8d 8e 7c 04 00 00 48 89 c8 48 89 4c 24 08 48 c1 e8 03 <0f> b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RIP: wait_consider_task+0x80/0x3030 kernel/exit.c:1329 RSP: ffff88805e4cfb30
---[ end trace 0e5af0d61b468e2d ]---

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/05/05 23:50 linux-4.14.y d71f695ce745 4b76dd25 .config log report
ci2-linux-4-14 2020/04/10 00:58 linux-4.14.y 4520f06b03ae a8c6a3f8 .config log report