syzbot


general protection fault in wait_consider_task (2)

Status: auto-closed as invalid on 2021/04/06 02:34
Reported-by: syzbot+8870fccbed426825a300@syzkaller.appspotmail.com
First crash: 569d, last: 569d
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-4.14 general protection fault in wait_consider_task 2 784d 810d 0/1 auto-closed as invalid on 2020/09/02 23:50
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

Sample crash report:
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
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: 0 PID: 8007 Comm: syz-executor.0 Not tainted 4.14.210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888098e0a080 task.stack: ffff8880ab618000
RIP: 0010:same_thread_group include/linux/sched/signal.h:573 [inline]
RIP: 0010:ptrace_reparented include/linux/ptrace.h:92 [inline]
RIP: 0010:wait_consider_task+0x191e/0x3350 kernel/exit.c:1371
RSP: 0018:ffff8880ab61fb40 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880001a2380 RCX: 0000070707070700
RDX: 000000e0e0e0e1c0 RSI: 0000000000000000 RDI: 0000070707070e00
RBP: ffff8880ab61fd1c R08: ffffffff8b994e50 R09: 000000000006008a
R10: ffff888098e0a908 R11: ffff888098e0a080 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880ab61fd18 R15: ffff8880001a27fc
FS:  00000000031ec940(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005598c872f9c8 CR3: 00000000b525d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1448 [inline]
 do_wait+0x3e9/0x930 kernel/exit.c:1519
 kernel_wait4+0x107/0x1e0 kernel/exit.c:1661
 SYSC_wait4 kernel/exit.c:1673 [inline]
 SyS_wait4+0xfe/0x110 kernel/exit.c:1669
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417ceb
RSP: 002b:00007fff9b5c2080 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000417ceb
RDX: 0000000040000001 RSI: 00007fff9b5c20e0 RDI: ffffffffffffffff
RBP: 00007fff9b5c20e0 R08: 0000000000000000 R09: 00000000031ec940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040000001
R13: 00007fff9b5c20e0 R14: 00007fff9b5c20f0 R15: 000000000007569f
Code: ea 03 80 3c 02 00 0f 85 b5 15 00 00 48 8b 8b e8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d b9 00 07 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 78 15 00 00 48 8b 81 00 07 00 00 49 8d bd 00 
RIP: same_thread_group include/linux/sched/signal.h:573 [inline] RSP: ffff8880ab61fb40
RIP: ptrace_reparented include/linux/ptrace.h:92 [inline] RSP: ffff8880ab61fb40
RIP: wait_consider_task+0x191e/0x3350 kernel/exit.c:1371 RSP: ffff8880ab61fb40
---[ end trace b1607b382123a4fe ]---

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/12/07 02:33 linux-4.14.y c196b3a9c83a c521566d .config log report info