bisecting fixing commit since 5076190daded2197f62fe92cf69674488be44175
building syzkaller on 0a96a13cb96316b8374bb7d8dd0793bcaff166a0
testing commit 5076190daded2197f62fe92cf69674488be44175 with gcc (GCC) 8.1.0
kernel signature: 6012e4f52de7b20de29e46f318bd7e4ec16fdf6f378d61a176f53b23772b647c
all runs: crashed: INFO: trying to register non-static key in prepare_to_wait_event
testing current HEAD 152036d1379ffd6985262743dcf6b0f9c75f83a4
testing commit 152036d1379ffd6985262743dcf6b0f9c75f83a4 with gcc (GCC) 8.1.0
kernel signature: e62e1eb06ebadcb248e0d2167790957c1b6b8575fc05746129e4e62ef374481c
all runs: crashed: INFO: trying to register non-static key in prepare_to_wait_event
revisions tested: 2, total time: 20m57.215103814s (build: 12m49.341509813s, test: 6m35.931340448s)
the crash still happens on HEAD
commit msg: Merge tag 'nfsd-5.7-rc-2' of git://git.linux-nfs.org/projects/cel/cel-2.6
crash: INFO: trying to register non-static key in prepare_to_wait_event
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 8442 Comm: syz-executor.3 Not tainted 5.7.0-rc5-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+0x128/0x182 lib/dump_stack.c:118
 assign_lock_key kernel/locking/lockdep.c:913 [inline]
 register_lock_class+0x1852/0x1860 kernel/locking/lockdep.c:1225
 __lock_acquire+0x100/0x3690 kernel/locking/lockdep.c:4234
 lock_acquire+0x1e3/0x970 kernel/locking/lockdep.c:4934
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x95/0xc0 kernel/locking/spinlock.c:159
 prepare_to_wait_event+0x65/0x650 kernel/sched/wait.c:280
 uhid_char_read+0x24c/0x5d1 drivers/hid/uhid.c:669
 do_loop_readv_writev fs/read_write.c:715 [inline]
 do_iter_read+0x36b/0x580 fs/read_write.c:936
 vfs_readv+0xc7/0x130 fs/read_write.c:1054
 do_readv+0x214/0x280 fs/read_write.c:1091
 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4c796c7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f4c796c86d4 RCX: 000000000045c849
RDX: 0000000000000002 RSI: 0000000020001680 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000886 R14: 00000000004cb18c R15: 000000000076bf0c
list_del corruption. prev->next should be ffffc90004bb7bb0, but was 0000000000000000
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8442 Comm: syz-executor.3 Not tainted 5.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4d lib/list_debug.c:51
Code: 73 ce 87 e8 cb bd 07 fe 0f 0b 48 89 de 48 c7 c7 e0 74 ce 87 e8 ba bd 07 fe 0f 0b 48 89 de 48 c7 c7 80 74 ce 87 e8 a9 bd 07 fe <0f> 0b cc cc cc 41 57 41 56 41 55 41 54 55 48 bd 00 00 00 00 00 fc
RSP: 0018:ffffc90004bb7a48 EFLAGS: 00010086
RAX: 0000000000000054 RBX: ffffc90004bb7bb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffffffff8b8cf0e0
RBP: ffff888075d11210 R08: ffffed1015d245f1 R09: ffffed1015d245f1
R10: ffff8880ae922f83 R11: ffffed1015d245f0 R12: ffff888075d11210
R13: ffff888075d111d0 R14: ffffc90004bb7bb0 R15: 0000000000000001
FS:  00007f4c796c8700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005634d3449030 CR3: 000000009f383000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:132 [inline]
 list_del_init include/linux/list.h:204 [inline]
 prepare_to_wait_event+0x1d4/0x650 kernel/sched/wait.c:294
 uhid_char_read+0x24c/0x5d1 drivers/hid/uhid.c:669
 do_loop_readv_writev fs/read_write.c:715 [inline]
 do_iter_read+0x36b/0x580 fs/read_write.c:936
 vfs_readv+0xc7/0x130 fs/read_write.c:1054
 do_readv+0x214/0x280 fs/read_write.c:1091
 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4c796c7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f4c796c86d4 RCX: 000000000045c849
RDX: 0000000000000002 RSI: 0000000020001680 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000886 R14: 00000000004cb18c R15: 000000000076bf0c
Modules linked in:
---[ end trace ca6aabf346a01fa6 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4d lib/list_debug.c:51
Code: 73 ce 87 e8 cb bd 07 fe 0f 0b 48 89 de 48 c7 c7 e0 74 ce 87 e8 ba bd 07 fe 0f 0b 48 89 de 48 c7 c7 80 74 ce 87 e8 a9 bd 07 fe <0f> 0b cc cc cc 41 57 41 56 41 55 41 54 55 48 bd 00 00 00 00 00 fc
RSP: 0018:ffffc90004bb7a48 EFLAGS: 00010086
RAX: 0000000000000054 RBX: ffffc90004bb7bb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffffffff8b8cf0e0
RBP: ffff888075d11210 R08: ffffed1015d245f1 R09: ffffed1015d245f1
R10: ffff8880ae922f83 R11: ffffed1015d245f0 R12: ffff888075d11210
R13: ffff888075d111d0 R14: ffffc90004bb7bb0 R15: 0000000000000001
FS:  00007f4c796c8700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005634d3449030 CR3: 000000009f383000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400