syzbot


BUG: unable to handle kernel paging request in swake_up_locked

Status: upstream: reported C repro on 2024/05/05 23:32
Reported-by: syzbot+72bba07d68718e0acd0c@syzkaller.appspotmail.com
First crash: 46d, last: 15d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 BUG: unable to handle kernel paging request in swake_up_locked origin:lts syz 1 12d 12d 0/2 premoderation: reported syz repro on 2024/06/09 02:26
upstream KMSAN: uninit-value in swake_up_locked kernel 2 1033d 1043d 0/27 auto-closed as invalid on 2021/11/21 11:48
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/05/19 23:32 2m retest repro android13-5.10-lts error OK
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/06/06 03:51 2h24m bisect fix android13-5.10-lts job log (0) log

Sample crash report:
BUG: unable to handle page fault for address: fffffffffffffff8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 6612067 P4D 6612067 PUD 6614067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 310 Comm: syz-executor938 Not tainted 5.10.210-syzkaller-00394-g70b6ab09a34b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:swake_up_locked+0x57/0x120 kernel/sched/swait.c:30
Code: 89 df e8 bc 57 59 00 4c 8b 3b 49 39 df 0f 84 ca 00 00 00 49 8d 7f f8 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 99 57 59 00 <49> 8b 7f f8 e8 10 e1 f9 ff 4c 89 ff e8 b8 96 07 01 84 c0 74 6a 49
RSP: 0018:ffffc900022a7d30 EFLAGS: 00010046
RAX: 1fffffffffffffff RBX: ffffc90001fe7aa0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: fffffffffffffff8
RBP: ffffc900022a7d58 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff52000454f98 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90001fe7a90 R14: 0000000000000246 R15: 0000000000000000
FS:  00005555562213c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 0000000116159000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 complete+0x5c/0xb0 kernel/sched/completion.c:36
 uinput_flush_requests drivers/input/misc/uinput.c:213 [inline]
 uinput_destroy_device+0x164/0x950 drivers/input/misc/uinput.c:298
 uinput_release+0x3e/0x50 drivers/input/misc/uinput.c:744
 __fput+0x309/0x760 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0xc5/0x1d0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fb6af562a8a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 53 81 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 b3 81 02 00 8b 44 24
RSP: 002b:00007ffe50aa0df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fb6af562a8a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000000dde3b R08: 0000000000000000 R09: 00007ffe50aa0ed0
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000003e8
R13: 00007fb6af5ea1bc R14: 00000000000dde6d R15: 00007fb6af5ea1a0
Modules linked in:
CR2: fffffffffffffff8
---[ end trace 7f3ef19fc4eed330 ]---
RIP: 0010:swake_up_locked+0x57/0x120 kernel/sched/swait.c:30
Code: 89 df e8 bc 57 59 00 4c 8b 3b 49 39 df 0f 84 ca 00 00 00 49 8d 7f f8 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 99 57 59 00 <49> 8b 7f f8 e8 10 e1 f9 ff 4c 89 ff e8 b8 96 07 01 84 c0 74 6a 49
RSP: 0018:ffffc900022a7d30 EFLAGS: 00010046
RAX: 1fffffffffffffff RBX: ffffc90001fe7aa0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: fffffffffffffff8
RBP: ffffc900022a7d58 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff52000454f98 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90001fe7a90 R14: 0000000000000246 R15: 0000000000000000
FS:  00005555562213c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 0000000116159000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 df                	mov    %ebx,%edi
   2:	e8 bc 57 59 00       	call   0x5957c3
   7:	4c 8b 3b             	mov    (%rbx),%r15
   a:	49 39 df             	cmp    %rbx,%r15
   d:	0f 84 ca 00 00 00    	je     0xdd
  13:	49 8d 7f f8          	lea    -0x8(%r15),%rdi
  17:	48 89 f8             	mov    %rdi,%rax
  1a:	48 c1 e8 03          	shr    $0x3,%rax
  1e:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  23:	74 05                	je     0x2a
  25:	e8 99 57 59 00       	call   0x5957c3
* 2a:	49 8b 7f f8          	mov    -0x8(%r15),%rdi <-- trapping instruction
  2e:	e8 10 e1 f9 ff       	call   0xfff9e143
  33:	4c 89 ff             	mov    %r15,%rdi
  36:	e8 b8 96 07 01       	call   0x10796f3
  3b:	84 c0                	test   %al,%al
  3d:	74 6a                	je     0xa9
  3f:	49                   	rex.WB

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/05 23:31 android13-5.10-lts 70b6ab09a34b 610f2a54 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: unable to handle kernel paging request in swake_up_locked
* Struck through repros no longer work on HEAD.