list_del corruption, ffff88810fb6bb68->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:55! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8069 Comm: syz-executor.1 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53 Code: 4c 89 f6 e8 d7 91 53 02 0f 0b 48 c7 c7 60 f3 5f 85 4c 89 f6 e8 c6 91 53 02 0f 0b 48 c7 c7 c0 f3 5f 85 4c 89 f6 e8 b5 91 53 02 <0f> 0b 48 c7 c7 20 f4 5f 85 4c 89 f6 e8 a4 91 53 02 0f 0b 48 c7 c7 RSP: 0000:ffffc900074f7468 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: caf2e9482a958100 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc900074f7488 R08: ffffffff8151fdf8 R09: ffffed103ee2a600 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff88810fb6bb68 R15: dead000000000122 FS: 00007f11f51c0700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556a71728 CR3: 0000000116934000 CR4: 00000000003506a0 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 include/linux/list.h:146 [inline] p9_fd_cancelled+0x74/0x1d0 net/9p/trans_fd.c:725 p9_client_flush+0x392/0x570 net/9p/client.c:677 p9_client_rpc+0xae6/0x1380 net/9p/client.c:784 p9_client_create+0x9be/0x1130 net/9p/client.c:1052 v9fs_session_init+0x1fa/0x19b0 fs/9p/v9fs.c:406 v9fs_mount+0x75/0x7b0 fs/9p/vfs_super.c:126 legacy_get_tree+0xf1/0x190 fs/fs_context.c:592 vfs_get_tree+0x88/0x290 fs/super.c:1550 do_new_mount+0x28b/0xac0 fs/namespace.c:2899 path_mount+0x56f/0xcb0 fs/namespace.c:3229 do_mount fs/namespace.c:3242 [inline] __do_sys_mount fs/namespace.c:3450 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3427 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f11f648f169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f11f51c0168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f11f65af120 RCX: 00007f11f648f169 RDX: 0000000020000b80 RSI: 0000000020000140 RDI: 0000000000000000 RBP: 00007f11f64eaca1 R08: 0000000020000600 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda62b978f R14: 00007f11f51c0300 R15: 0000000000022000 Modules linked in: ---[ end trace e64f6b13b30369e5 ]--- RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53 Code: 4c 89 f6 e8 d7 91 53 02 0f 0b 48 c7 c7 60 f3 5f 85 4c 89 f6 e8 c6 91 53 02 0f 0b 48 c7 c7 c0 f3 5f 85 4c 89 f6 e8 b5 91 53 02 <0f> 0b 48 c7 c7 20 f4 5f 85 4c 89 f6 e8 a4 91 53 02 0f 0b 48 c7 c7 RSP: 0000:ffffc900074f7468 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: caf2e9482a958100 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc900074f7488 R08: ffffffff8151fdf8 R09: ffffed103ee2a600 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff88810fb6bb68 R15: dead000000000122 FS: 00007f11f51c0700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556a71728 CR3: 0000000116934000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400