list_del corruption, ffff888073ea87b0->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:55! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 14652 Comm: syz-executor.4 Not tainted 6.1.58-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53 Code: 4c 89 fe e8 36 dc 49 06 0f 0b 48 c7 c7 c0 f0 3c 8b 4c 89 fe e8 25 dc 49 06 0f 0b 48 c7 c7 20 f1 3c 8b 4c 89 fe e8 14 dc 49 06 <0f> 0b 48 c7 c7 80 f1 3c 8b 4c 89 fe e8 03 dc 49 06 0f 0b 48 c7 c7 RSP: 0018:ffffc90015547830 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: 59d57a3004414500 RDX: ffffc9000cd60000 RSI: 000000000000a2c4 RDI: 000000000000a2c5 RBP: ffff888073ea8700 R08: ffffffff816e032c R09: fffff52002aa8ea5 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff88803c944800 R14: dead000000000100 R15: ffff888073ea87b0 FS: 00007f924f42d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc768ec66e4 CR3: 00000000780e1000 CR4: 00000000003506f0 Call Trace: <TASK> __list_del_entry include/linux/list.h:134 [inline] list_del include/linux/list.h:148 [inline] p9_fd_cancelled+0x95/0x220 net/9p/trans_fd.c:734 p9_client_flush+0x3b6/0x530 net/9p/client.c:610 p9_client_rpc+0x82b/0x9e0 net/9p/client.c:730 p9_client_stat+0x10a/0x270 net/9p/client.c:1677 v9fs_mount+0x77d/0xc30 fs/9p/vfs_super.c:172 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x28b/0xae0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f924e67cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f924f42d0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f924e79c120 RCX: 00007f924e67cae9 RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00007f924e6c847a R08: 00000000200001c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f924e79c120 R15: 00007ffccfed6de8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53 Code: 4c 89 fe e8 36 dc 49 06 0f 0b 48 c7 c7 c0 f0 3c 8b 4c 89 fe e8 25 dc 49 06 0f 0b 48 c7 c7 20 f1 3c 8b 4c 89 fe e8 14 dc 49 06 <0f> 0b 48 c7 c7 80 f1 3c 8b 4c 89 fe e8 03 dc 49 06 0f 0b 48 c7 c7 RSP: 0018:ffffc90015547830 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: 59d57a3004414500 RDX: ffffc9000cd60000 RSI: 000000000000a2c4 RDI: 000000000000a2c5 RBP: ffff888073ea8700 R08: ffffffff816e032c R09: fffff52002aa8ea5 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff88803c944800 R14: dead000000000100 R15: ffff888073ea87b0 FS: 00007f924f42d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc768ec66e4 CR3: 00000000780e1000 CR4: 00000000003506f0