general protection fault, probably for non-canonical address 0xdffffc0000000023: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] CPU: 0 PID: 4546 Comm: syz-executor.4 Not tainted 5.18.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:workqueue_sysfs_unregister kernel/workqueue.c:5774 [inline] RIP: 0010:destroy_workqueue+0x29/0x720 kernel/workqueue.c:4408 Code: 90 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 49 89 fc 48 81 c7 18 01 00 00 48 89 fa 55 48 c1 ea 03 53 48 83 ec 08 <80> 3c 02 00 0f 85 68 06 00 00 49 8b 84 24 18 01 00 00 48 85 c0 74 RSP: 0018:ffffc90005dcf848 EFLAGS: 00010296 RAX: dffffc0000000000 RBX: ffff888078158000 RCX: 1ffffffff1e3861e RDX: 0000000000000023 RSI: ffffffff88eba320 RDI: 0000000000000118 RBP: ffff888078158000 R08: 0000000000000000 R09: ffffffff8f149a47 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888078158fc8 R14: 0000000000001000 R15: 00000000fffffff4 FS: 00007f9cc4e16700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc078b9c028 CR3: 00000000681b3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_stop_all_workers+0x146/0x2ea fs/btrfs/disk-io.c:2286 open_ctree+0x3e68/0x3f1f fs/btrfs/disk-io.c:3959 btrfs_fill_super fs/btrfs/super.c:1430 [inline] btrfs_mount_root.cold+0xe/0x118 fs/btrfs/super.c:1796 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 fc_mount fs/namespace.c:1043 [inline] vfs_kern_mount.part.0+0x70/0x100 fs/namespace.c:1073 btrfs_mount+0x1aa/0x860 fs/btrfs/super.c:1856 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9cc3c8a61a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9cc4e15f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f9cc3c8a61a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f9cc4e15fe0 RBP: 00007f9cc4e16020 R08: 00007f9cc4e16020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f9cc4e15fe0 R15: 000000002001ee00 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:workqueue_sysfs_unregister kernel/workqueue.c:5774 [inline] RIP: 0010:destroy_workqueue+0x29/0x720 kernel/workqueue.c:4408 Code: 90 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 49 89 fc 48 81 c7 18 01 00 00 48 89 fa 55 48 c1 ea 03 53 48 83 ec 08 <80> 3c 02 00 0f 85 68 06 00 00 49 8b 84 24 18 01 00 00 48 85 c0 74 RSP: 0018:ffffc90005dcf848 EFLAGS: 00010296 RAX: dffffc0000000000 RBX: ffff888078158000 RCX: 1ffffffff1e3861e RDX: 0000000000000023 RSI: ffffffff88eba320 RDI: 0000000000000118 RBP: ffff888078158000 R08: 0000000000000000 R09: ffffffff8f149a47 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888078158fc8 R14: 0000000000001000 R15: 00000000fffffff4 FS: 00007f9cc4e16700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5b5c59a378 CR3: 00000000681b3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 8: fc ff df b: 41 57 push %r15 d: 41 56 push %r14 f: 41 55 push %r13 11: 41 54 push %r12 13: 49 89 fc mov %rdi,%r12 16: 48 81 c7 18 01 00 00 add $0x118,%rdi 1d: 48 89 fa mov %rdi,%rdx 20: 55 push %rbp 21: 48 c1 ea 03 shr $0x3,%rdx 25: 53 push %rbx 26: 48 83 ec 08 sub $0x8,%rsp * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 68 06 00 00 jne 0x69c 34: 49 8b 84 24 18 01 00 mov 0x118(%r12),%rax 3b: 00 3c: 48 85 c0 test %rax,%rax 3f: 74 .byte 0x74