Hello, syzbot found the following issue on: HEAD commit: 6537cfb395f3 Merge tag 'sound-6.14-rc4' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15c1a498580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b7bde34acd8f53b1 dashboard link: https://syzkaller.appspot.com/bug?extid=099785fe1f1da3e8a1cb compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1080fbf8580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-6537cfb3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1f0fee59b531/vmlinux-6537cfb3.xz kernel image: https://storage.googleapis.com/syzbot-assets/ebf361d1fa57/bzImage-6537cfb3.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/79ce9b36e5f4/mount_2.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+099785fe1f1da3e8a1cb@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 UID: 0 PID: 4732 Comm: udevd Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 assign_lock_key+0x241/0x280 kernel/locking/lockdep.c:983 register_lock_class+0x1cf/0x980 kernel/locking/lockdep.c:1297 __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5103 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] lockref_get+0x15/0x60 lib/lockref.c:50 __d_find_any_alias fs/dcache.c:970 [inline] d_splice_alias+0xdf/0x330 fs/dcache.c:3020 __lookup_slow+0x296/0x400 fs/namei.c:1793 lookup_slow+0x53/0x70 fs/namei.c:1810 walk_component fs/namei.c:2114 [inline] link_path_walk+0x99b/0xea0 fs/namei.c:2479 path_openat+0x266/0x3590 fs/namei.c:3985 do_filp_open+0x27f/0x4e0 fs/namei.c:4016 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f5f3169a4 Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffe3a832a00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f3f5f3169a4 RDX: 0000000000080000 RSI: 00007ffe3a832b38 RDI: 00000000ffffff9c RBP: 00007ffe3a832b38 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 000055a830a2db42 R14: 0000000000000001 R15: 0000000000000000 </TASK> Oops: general protection fault, probably for non-canonical address 0xdffffc0020000017: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000001000000b8-0x00000001000000bf] CPU: 0 UID: 0 PID: 4732 Comm: udevd Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] RIP: 0010:do_raw_spin_lock+0x7f/0x370 kernel/locking/spinlock_debug.c:115 Code: 48 8d 74 24 40 48 c1 ee 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 48 89 d8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 f6 01 00 00 8b 03 3d ad 4e ad de 0f 85 62 RSP: 0018:ffffc900026df5e0 EFLAGS: 00010206 RAX: 0000000020000017 RBX: 00000001000000bb RCX: 1ffff920004dbec4 RDX: dffffc0000000000 RSI: 1ffff920004dbec4 RDI: 00000001000000b7 RBP: ffffc900026df6a8 R08: ffffffff903ce777 R09: 1ffffffff2079cee R10: dffffc0000000000 R11: fffffbfff2079cef R12: 00000001000000b7 R13: ffff888031f23028 R14: ffff888031fa4758 R15: dffffc0000000000 FS: 00007f3f5f78f280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7bf01e4270 CR3: 000000001f28c000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> spin_lock include/linux/spinlock.h:351 [inline] lockref_get+0x15/0x60 lib/lockref.c:50 dget include/linux/dcache.h:352 [inline] d_splice_alias+0x1bb/0x330 fs/dcache.c:3036 __lookup_slow+0x296/0x400 fs/namei.c:1793 lookup_slow+0x53/0x70 fs/namei.c:1810 walk_component fs/namei.c:2114 [inline] link_path_walk+0x99b/0xea0 fs/namei.c:2479 path_openat+0x266/0x3590 fs/namei.c:3985 do_filp_open+0x27f/0x4e0 fs/namei.c:4016 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f5f3169a4 Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffe3a832a00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f3f5f3169a4 RDX: 0000000000080000 RSI: 00007ffe3a832b38 RDI: 00000000ffffff9c RBP: 00007ffe3a832b38 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 000055a830a2db42 R14: 0000000000000001 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] RIP: 0010:do_raw_spin_lock+0x7f/0x370 kernel/locking/spinlock_debug.c:115 Code: 48 8d 74 24 40 48 c1 ee 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 48 89 d8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 f6 01 00 00 8b 03 3d ad 4e ad de 0f 85 62 RSP: 0018:ffffc900026df5e0 EFLAGS: 00010206 RAX: 0000000020000017 RBX: 00000001000000bb RCX: 1ffff920004dbec4 RDX: dffffc0000000000 RSI: 1ffff920004dbec4 RDI: 00000001000000b7 RBP: ffffc900026df6a8 R08: ffffffff903ce777 R09: 1ffffffff2079cee R10: dffffc0000000000 R11: fffffbfff2079cef R12: 00000001000000b7 R13: ffff888031f23028 R14: ffff888031fa4758 R15: dffffc0000000000 FS: 00007f3f5f78f280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7bf01e4270 CR3: 000000001f28c000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 8d 74 24 40 lea 0x40(%rsp),%rsi 5: 48 c1 ee 03 shr $0x3,%rsi 9: 48 b8 f1 f1 f1 f1 04 movabs $0xf3f3f304f1f1f1f1,%rax 10: f3 f3 f3 13: 48 89 f1 mov %rsi,%rcx 16: 48 89 74 24 38 mov %rsi,0x38(%rsp) 1b: 48 89 04 16 mov %rax,(%rsi,%rdx,1) 1f: 48 8d 5f 04 lea 0x4(%rdi),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 f6 01 00 00 jne 0x22c 36: 8b 03 mov (%rbx),%eax 38: 3d ad 4e ad de cmp $0xdead4ead,%eax 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: 62 .byte 0x62 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
