general protection fault in lock_sock

general protection fault in lock_sock_nested
Status: auto-closed as invalid on 2021/09/04 19:35
Reported-by: syzbot+e50791b307d00c5cf534@syzkaller.appspotmail.com
First crash: 390d, last: 172d

similar bugs (9):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-49	general protection fault in lock_sock_nested				1	1354d	1354d	0/3	auto-closed as invalid on 2019/02/22 12:39
upstream	BUG: unable to handle kernel paging request in lock_sock_nested				43	7d09h	447d	0/22	upstream: reported on 2020/08/05 16:09
linux-4.19	KASAN: wild-memory-access Write in lock_sock_nested				2	271d	340d	0/1	auto-closed as invalid on 2021/05/28 14:35
linux-4.19	KASAN: use-after-free Read in lock_sock_nested	C			336	1d20h	823d	0/1	upstream: reported C repro on 2019/07/26 21:27
linux-4.14	KASAN: use-after-free Read in lock_sock_nested	C		inconclusive	320	16d	917d	0/1	upstream: reported C repro on 2019/04/24 06:28
upstream	KASAN: use-after-free Read in lock_sock_nested	C	inconclusive	done	1813	1d04h	1028d	0/22	upstream: reported C repro on 2019/01/02 10:41
linux-4.14	BUG: unable to handle kernel paging request in lock_sock_nested				4	165d	285d	0/1	auto-closed as invalid on 2021/09/11 11:51
upstream	KASAN: slab-out-of-bounds Read in lock_sock_nested	syz	unreliable		23	1d20h	441d	0/22	upstream: reported syz repro on 2020/08/11 16:59
linux-4.19	KASAN: slab-out-of-bounds Read in lock_sock_nested				8	64d	348d	0/1	upstream: reported on 2020/11/12 16:53

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: 0 PID: 3622 Comm: kworker/0:2 Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
task: ffff8880a8e342c0 task.stack: ffff8880a8e48000
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:__lock_acquire+0x21e/0x3f20 kernel/locking/lockdep.c:3382
RSP: 0018:ffff8880a8e4f9a8 EFLAGS: 00010086
RAX: dead4ead00000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff110096f4295 RSI: 0000000000000000 RDI: ffff88804b7a14a8
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8880a8e342c0 R12: ffff88804b7a14a0
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8bebbd40
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c67eb122c8 CR3: 0000000052483000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:176
 spin_lock_bh include/linux/spinlock.h:322 [inline]
 lock_sock_nested+0x39/0x100 net/core/sock.c:2788
 l2cap_sock_teardown_cb+0x93/0x650 net/bluetooth/l2cap_sock.c:1341
 l2cap_chan_del+0xaf/0x950 net/bluetooth/l2cap_core.c:599
 l2cap_chan_close+0x103/0x870 net/bluetooth/l2cap_core.c:757
 l2cap_chan_timeout+0x143/0x2a0 net/bluetooth/l2cap_core.c:430
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 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 arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff8880a8e4f9a8
RIP: __lock_acquire+0x21e/0x3f20 kernel/locking/lockdep.c:3382 RSP: ffff8880a8e4f9a8
---[ end trace b6e24dfe011af0ef ]---

Crashes (4):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-linux-4-14	2021/05/07 19:35	linux-4.14.y	7d7d1c0ab3eb	f6da8120	.config	log	report	info	general protection fault in lock_sock_nested
ci2-linux-4-14	2021/01/30 09:49	linux-4.14.y	2d2791fce891	fc9fd31e	.config	log	report	info	general protection fault in lock_sock_nested
ci2-linux-4-14	2021/01/03 03:43	linux-4.14.y	1752938529c6	79264ae3	.config	log	report	info
ci2-linux-4-14	2020/10/01 19:04	linux-4.14.y	cbfa1702aaf6	4103fce0	.config	log	report	info