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
CPU: 1 PID: 6694 Comm: syz-executor.2 Not tainted 4.19.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0xa9/0xef lib/list_debug.c:54
Code: ea 03 80 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 97 00 00 00 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 22 49 8b 55 08 48 39 ea 0f 85 a8 00 00 00 5d b8 01
RSP: 0018:ffff88808f907a08 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff813d9af6
RDX: 0000000000000001 RSI: ffffffff81401242 RDI: 0000000000000008
RBP: ffff8880001009a0 R08: ffff88809ad66500 R09: ffffed1015ce4733
R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffff8880a41451f0
R13: 0000000000000000 R14: ffffed1014828a3e R15: ffff8880001009a8
FS:  0000000001bdb940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7ce16198 CR3: 0000000090625000 CR4: 00000000001426e0
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_init include/linux/list.h:159 [inline]
 flush_sigqueue+0x8c/0x220 kernel/signal.c:461
 __exit_signal kernel/exit.c:170 [inline]
 release_task+0xc08/0x1570 kernel/exit.c:201
 wait_task_zombie kernel/exit.c:1168 [inline]
 wait_consider_task+0x2a9e/0x35a0 kernel/exit.c:1395
 do_wait_thread kernel/exit.c:1458 [inline]
 do_wait+0x429/0x9c0 kernel/exit.c:1529
 kernel_wait4+0x14c/0x260 kernel/exit.c:1672
 __do_sys_wait4+0x147/0x160 kernel/exit.c:1684
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4168ca
Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 ce 30 89 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007fff7ce16198 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 0000000000113757 RCX: 00000000004168ca
RDX: 0000000040000001 RSI: 00007fff7ce161d0 RDI: ffffffffffffffff
RBP: 0000000000000804 R08: 0000000000000001 R09: 0000000001bdb940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff7ce161d0 R14: 0000000000113757 R15: 00007fff7ce161e0
Modules linked in:
---[ end trace 8730ee31cd9d7de1 ]---
RIP: 0010:__list_del_entry_valid+0xa9/0xef lib/list_debug.c:54
Code: ea 03 80 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 97 00 00 00 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 22 49 8b 55 08 48 39 ea 0f 85 a8 00 00 00 5d b8 01
RSP: 0018:ffff88808f907a08 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff813d9af6
RDX: 0000000000000001 RSI: ffffffff81401242 RDI: 0000000000000008
RBP: ffff8880001009a0 R08: ffff88809ad66500 R09: ffffed1015ce4733
R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffff8880a41451f0
R13: 0000000000000000 R14: ffffed1014828a3e R15: ffff8880001009a8
FS:  0000000001bdb940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7ce16198 CR3: 0000000090625000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400