syzbot


general protection fault in lock_timer_base (3)

Status: auto-closed as invalid on 2021/06/30 20:28
Reported-by: syzbot+9d57c88859e2fd6b9eba@syzkaller.appspotmail.com
First crash: 508d, last: 491d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in lock_timer_base (2) 8 668d 834d 0/1 auto-closed as invalid on 2021/01/05 13:46
linux-4.14 general protection fault in lock_timer_base (4) 2 62d 69d 0/1 upstream: reported on 2022/04/29 15:08
linux-4.14 general protection fault in lock_timer_base 2 1156d 1177d 0/1 auto-closed as invalid on 2019/10/25 08:49
upstream BUG: unable to handle kernel paging request in lock_timer_base 1 1660d 1658d 0/22 closed as invalid on 2018/02/13 20:06

Sample crash report:
warning: process `syz-executor.3' used the obsolete bdflush system call
Fix your initscripts?
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: 9260 Comm: kworker/u4:6 Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tipc_send tipc_send_work
task: ffff8880a9418140 task.stack: ffff888051de8000
RIP: 0010:atomic_inc syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:__lock_acquire+0x21e/0x3f20 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:3382
RSP: 0018:ffff888051def8a0 EFLAGS: 00010002
RAX: 7020382036352032 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffffffff116cbdd RSI: 0000000000000000 RDI: ffffffff88b65eeb
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: ffff8880a9418140 R12: ffffffff88b65ee3
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8beb4d40
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002ba0708 CR3: 00000000b4a73000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3f0 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:3998
 __raw_spin_lock_irqsave syzkaller/managers/linux-4-14/kernel/./include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xc0 syzkaller/managers/linux-4-14/kernel/kernel/locking/spinlock.c:160
 lock_timer_base+0x58/0x190 syzkaller/managers/linux-4-14/kernel/kernel/time/timer.c:922
 del_timer syzkaller/managers/linux-4-14/kernel/kernel/time/timer.c:1154 [inline]
 del_timer+0x8b/0xe0 syzkaller/managers/linux-4-14/kernel/kernel/time/timer.c:1145
 tipc_subscrb_subscrp_delete+0x13a/0x330 syzkaller/managers/linux-4-14/kernel/net/tipc/subscr.c:207
 tipc_subscrb_delete syzkaller/managers/linux-4-14/kernel/net/tipc/subscr.c:238 [inline]
 tipc_subscrb_release_cb+0x13/0x20 syzkaller/managers/linux-4-14/kernel/net/tipc/subscr.c:316
 tipc_close_conn+0x16a/0x200 syzkaller/managers/linux-4-14/kernel/net/tipc/server.c:203
 tipc_send_to_sock syzkaller/managers/linux-4-14/kernel/net/tipc/server.c:538 [inline]
 tipc_send_work+0x41e/0x520 syzkaller/managers/linux-4-14/kernel/net/tipc/server.c:564
 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250
 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232
 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404
Code: 00 fc ff df 41 89 f6 4b 8d 7c f4 08 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 2a 00 00 4b 8b 44 f4 08 48 85 c0 0f 84 31 ff ff ff <f0> ff 80 38 01 00 00 49 8d b3 80 08 00 00 48 ba 00 00 00 00 00 
RIP: atomic_inc syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff888051def8a0
RIP: __lock_acquire+0x21e/0x3f20 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:3382 RSP: ffff888051def8a0
---[ end trace 5f912da9d4afcc99 ]---

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2021/02/14 06:15 linux-4.14.y 2c8a3fceddf0 98682e5e .config log report info general protection fault in lock_timer_base
ci2-linux-4-14 2021/03/02 20:27 linux-4.14.y 3242aa3a635c e5b64d68 .config log report info BUG: unable to handle kernel paging request in lock_timer_base