INFO: trying to register non-static key in calculate_sigpending (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    da690031 Merge branch 'i2c/for-current' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10924af0500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=de7f697da23057c7
dashboard link: https://syzkaller.appspot.com/bug?extid=8197be5a9c103a92a095
compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8197be5a9c103a92a095@xxxxxxxxxxxxxxxxxxxxxxxxx

INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 28294 Comm: systemd-udevd Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 register_lock_class+0xf06/0x1520 kernel/locking/lockdep.c:893
 __lock_acquire+0xfd/0x2ae0 kernel/locking/lockdep.c:4320
 lock_acquire+0x148/0x720 kernel/locking/lockdep.c:5029
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
 _raw_spin_lock_irq+0xa6/0xc0 kernel/locking/spinlock.c:167
 spin_lock_irq include/linux/spinlock.h:379 [inline]
 calculate_sigpending+0x4b/0x80 kernel/signal.c:196
 ret_from_fork+0x8/0x30 arch/x86/entry/entry_64.S:279
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 28294 Comm: systemd-udevd Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid+0x27/0xc0 lib/list_debug.c:23
Code: cc cc cc 41 57 41 56 41 55 41 54 53 49 89 d6 49 89 f4 49 89 ff 49 bd 00 00 00 00 00 fc ff df 48 8d 5a 08 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 da 45 f2 fd 48 8b 13 4c 39 e2 75
RSP: 0018:ffffc90002637c60 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888000135508 RDI: ffff888093d37030
RBP: ffff8880001354c8 R08: dffffc0000000000 R09: fffff520004c6f86
R10: fffff520004c6f86 R11: 0000000000000000 R12: ffff888000135508
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888093d37030
FS:  00007fd162f298c0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd161da9f60 CR3: 00000000a0a66000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:67 [inline]
 list_add include/linux/list.h:86 [inline]
 __add_wait_queue include/linux/wait.h:171 [inline]
 add_wait_queue+0x77/0x130 kernel/sched/wait.c:24
 ep_ptable_queue_proc+0x1a0/0x380 fs/eventpoll.c:1322
 poll_wait include/linux/poll.h:51 [inline]
 signalfd_poll+0xb5/0x190 fs/signalfd.c:66
 vfs_poll include/linux/poll.h:90 [inline]
 ep_item_poll fs/eventpoll.c:885 [inline]
 ep_insert fs/eventpoll.c:1551 [inline]
 do_epoll_ctl+0x1a2f/0x3680 fs/eventpoll.c:2228
 __do_sys_epoll_ctl fs/eventpoll.c:2281 [inline]
 __se_sys_epoll_ctl fs/eventpoll.c:2272 [inline]
 __x64_sys_epoll_ctl+0xfe/0x130 fs/eventpoll.c:2272
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fd161daa2aa
Code: 48 8b 0d f1 fb 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 e9 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d be fb 2a 00 f7 d8 64 89 01 48
RSP: 002b:00007fff5f0a8608 EFLAGS: 00000202 ORIG_RAX: 00000000000000e9
RAX: ffffffffffffffda RBX: 00007fff5f0a8700 RCX: 00007fd161daa2aa
RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 000055723c6ff028 R08: 0000000000000020 R09: 0000000000000018
R10: 00007fff5f0a86a8 R11: 0000000000000202 R12: 000055723c6ff010
R13: 000055723c713b00 R14: 0000000000000003 R15: 000000000000000e
Modules linked in:
---[ end trace 292889b8b04a67ad ]---
RIP: 0010:__list_add_valid+0x27/0xc0 lib/list_debug.c:23
Code: cc cc cc 41 57 41 56 41 55 41 54 53 49 89 d6 49 89 f4 49 89 ff 49 bd 00 00 00 00 00 fc ff df 48 8d 5a 08 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 da 45 f2 fd 48 8b 13 4c 39 e2 75
RSP: 0018:ffffc90002637c60 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888000135508 RDI: ffff888093d37030
RBP: ffff8880001354c8 R08: dffffc0000000000 R09: fffff520004c6f86
R10: fffff520004c6f86 R11: 0000000000000000 R12: ffff888000135508
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888093d37030
FS:  00007fd162f298c0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd161da9f60 CR3: 00000000a0a66000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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