list_del corruption, ffff888032cd30c0->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 6231 Comm: syz.3.83 Not tainted 6.12.0-next-20241122-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56 Code: e8 91 42 40 fc 90 0f 0b 48 c7 c7 20 8c 5e 8c 4c 89 fe e8 7f 42 40 fc 90 0f 0b 48 c7 c7 80 8c 5e 8c 4c 89 fe e8 6d 42 40 fc 90 <0f> 0b 48 c7 c7 e0 8c 5e 8c 4c 89 fe e8 5b 42 40 fc 90 0f 0b 48 c7 RSP: 0018:ffffc90005047710 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: 382bcb530d7ced00 RDX: ffffc9000ece7000 RSI: 000000000000c793 RDI: 000000000000c794 RBP: ffff888032cd3000 R08: ffffffff817f05ec R09: 1ffff92000a08e7c R10: dffffc0000000000 R11: fffff52000a08e7d R12: dffffc0000000000 R13: ffff888022f04800 R14: dead000000000100 R15: ffff888032cd30c0 FS: 00007f1fb2a9b6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558485b45ca3 CR3: 00000000316ce000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] p9_fd_cancelled+0x99/0x220 net/9p/trans_fd.c:736 p9_client_flush+0x3c2/0x540 net/9p/client.c:618 p9_client_rpc+0x8d4/0xac0 net/9p/client.c:741 p9_client_stat+0x10e/0x280 net/9p/client.c:1741 v9fs_inode_from_fid+0x82/0x550 fs/9p/vfs_inode.c:456 v9fs_get_new_inode_from_fid fs/9p/v9fs.h:253 [inline] v9fs_mount+0x6fe/0xa90 fs/9p/vfs_super.c:142 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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: 0033:0x7f1fb1d7e819 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1fb2a9b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1fb1f36160 RCX: 00007f1fb1d7e819 RDX: 0000000020000b80 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f1fb1df175e R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1fb1f36160 R15: 00007ffda349c008 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56 Code: e8 91 42 40 fc 90 0f 0b 48 c7 c7 20 8c 5e 8c 4c 89 fe e8 7f 42 40 fc 90 0f 0b 48 c7 c7 80 8c 5e 8c 4c 89 fe e8 6d 42 40 fc 90 <0f> 0b 48 c7 c7 e0 8c 5e 8c 4c 89 fe e8 5b 42 40 fc 90 0f 0b 48 c7 RSP: 0018:ffffc90005047710 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: 382bcb530d7ced00 RDX: ffffc9000ece7000 RSI: 000000000000c793 RDI: 000000000000c794 RBP: ffff888032cd3000 R08: ffffffff817f05ec R09: 1ffff92000a08e7c R10: dffffc0000000000 R11: fffff52000a08e7d R12: dffffc0000000000 R13: ffff888022f04800 R14: dead000000000100 R15: ffff888032cd30c0 FS: 00007f1fb2a9b6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558485b45ca3 CR3: 00000000316ce000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400