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:00007f98312a6f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000001a4 RCX: 00007f98325355fa RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f98312a6fe0 RBP: 00007f98312a7020 R08: 00007f98312a7020 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000202 R12: 0000000020000040 R13: 0000000020000080 R14: 00007f98312a6fe0 R15: 0000000020000000 ---[ end trace 81bf264380b5db32 ]--- list_add corruption. prev is NULL. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:24! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3965 Comm: syz-executor.2 Tainted: G W 5.15.78-syzkaller-00911-gc73b4619ad86 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__list_add_valid+0xbc/0x100 lib/list_debug.c:23 Code: c0 74 ed 48 c7 c7 60 a3 87 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 0f 95 5b 02 0f 0b 48 c7 c7 60 a1 87 85 31 c0 e8 ff 94 5b 02 <0f> 0b 48 c7 c7 00 a2 87 85 31 c0 e8 ef 94 5b 02 0f 0b 48 c7 c7 60 RSP: 0018:ffffc90000def8e0 EFLAGS: 00010046 RAX: 0000000000000022 RBX: 1ffff920001bdf3d RCX: d00ee4b9e37d9400 RDX: ffffc90004f8a000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90000def908 R08: ffffffff81584ba9 R09: ffffed103ee04e93 R10: ffffed103ee04e93 R11: 1ffff1103ee04e92 R12: ffffc90000def9e8 R13: 1ffff1102344592c R14: ffffc90000def9e0 R15: ffff88811a22c960 FS: 00007f98312a7700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efcd9c23c18 CR3: 0000000126e3e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] __prepare_to_swait+0xad/0x140 kernel/sched/swait.c:89 do_wait_for_common kernel/sched/completion.c:82 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common+0x257/0x430 kernel/sched/completion.c:117 wait_for_completion+0x18/0x20 kernel/sched/completion.c:138 erofs_unregister_sysfs+0x5e/0x70 fs/erofs/sysfs.c:209 erofs_put_super+0x46/0xa0 fs/erofs/super.c:815 generic_shutdown_super+0x157/0x2e0 fs/super.c:466 kill_block_super+0x80/0xe0 fs/super.c:1396 erofs_kill_sb+0x66/0x130 fs/erofs/super.c:796 deactivate_locked_super+0xb0/0x100 fs/super.c:335 get_tree_bdev+0x45d/0x680 fs/super.c:1296 erofs_fc_get_tree+0x1c/0x20 fs/erofs/super.c:708 vfs_get_tree+0x88/0x290 fs/super.c:1499 do_new_mount+0x289/0xad0 fs/namespace.c:2994 path_mount+0x60b/0x1050 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2d2/0x3c0 fs/namespace.c:3522 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f98325355fa 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:00007f98312a6f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000001a4 RCX: 00007f98325355fa RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f98312a6fe0 RBP: 00007f98312a7020 R08: 00007f98312a7020 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000202 R12: 0000000020000040 R13: 0000000020000080 R14: 00007f98312a6fe0 R15: 0000000020000000 Modules linked in: ---[ end trace 81bf264380b5db33 ]--- RIP: 0010:__list_add_valid+0xbc/0x100 lib/list_debug.c:23 Code: c0 74 ed 48 c7 c7 60 a3 87 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 0f 95 5b 02 0f 0b 48 c7 c7 60 a1 87 85 31 c0 e8 ff 94 5b 02 <0f> 0b 48 c7 c7 00 a2 87 85 31 c0 e8 ef 94 5b 02 0f 0b 48 c7 c7 60 RSP: 0018:ffffc90000def8e0 EFLAGS: 00010046 RAX: 0000000000000022 RBX: 1ffff920001bdf3d RCX: d00ee4b9e37d9400 RDX: ffffc90004f8a000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90000def908 R08: ffffffff81584ba9 R09: ffffed103ee04e93 R10: ffffed103ee04e93 R11: 1ffff1103ee04e92 R12: ffffc90000def9e8 R13: 1ffff1102344592c R14: ffffc90000def9e0 R15: ffff88811a22c960 FS: 00007f98312a7700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efcd9c23c18 CR3: 0000000126e3e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c7 c2 b8 ff ff ff mov $0xffffffffffffffb8,%rdx 7: f7 d8 neg %eax 9: 64 89 02 mov %eax,%fs:(%rdx) c: b8 ff ff ff ff mov $0xffffffff,%eax 11: eb d2 jmp 0xffffffe5 13: e8 b8 04 00 00 callq 0x4d0 18: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 1f: 00 20: 49 89 ca mov %rcx,%r10 23: b8 a5 00 00 00 mov $0xa5,%eax 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 b8 ff ff ff mov $0xffffffffffffffb8,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W