list_del corruption, ffff8881e15f3be0->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: 3277 Comm: syz-executor.2 Not tainted 5.4.219-syzkaller-00097-ga76dfbc99260 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__list_del_entry_valid+0xef/0x130 lib/list_debug.c:53 Code: ae 30 18 02 0f 0b 48 c7 c7 80 42 fe 84 4c 89 f6 31 c0 e8 9b 30 18 02 0f 0b 48 c7 c7 e0 42 fe 84 4c 89 f6 31 c0 e8 88 30 18 02 <0f> 0b 48 c7 c7 40 43 fe 84 4c 89 f6 31 c0 e8 75 30 18 02 0f 0b 48 RSP: 0018:ffff8881e4b4f438 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: c85fa7b3ff0a2f00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000005 R08: ffffffff814e3a77 R09: ffffed103edcaa08 R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: dffffc0000000000 R13: ffff8881e15f3b60 R14: ffff8881e15f3be0 R15: dead000000000122 FS: 00007f6ed1ca7700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e7207f CR3: 00000001eb9f6000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:131 [inline] list_del include/linux/list.h:139 [inline] p9_fd_cancelled+0x71/0x1b0 net/9p/trans_fd.c:722 p9_client_flush+0x37b/0x570 net/9p/client.c:677 p9_client_rpc+0x83e/0xae0 net/9p/client.c:784 p9_client_version+0x179/0x710 net/9p/client.c:942 p9_client_create+0x8a1/0xb60 net/9p/client.c:1052 v9fs_session_init+0x1f0/0x17d0 fs/9p/v9fs.c:406 v9fs_mount+0x72/0x770 fs/9p/vfs_super.c:124 legacy_get_tree+0xde/0x170 fs/fs_context.c:647 vfs_get_tree+0x85/0x260 fs/super.c:1547 do_new_mount+0x299/0x580 fs/namespace.c:2843 do_mount+0x6ac/0xe10 fs/namespace.c:3163 ksys_mount+0xc2/0xf0 fs/namespace.c:3372 __do_sys_mount fs/namespace.c:3386 [inline] __se_sys_mount fs/namespace.c:3383 [inline] __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Modules linked in: ---[ end trace 0510fdc060feacb9 ]--- RIP: 0010:__list_del_entry_valid+0xef/0x130 lib/list_debug.c:53 Code: ae 30 18 02 0f 0b 48 c7 c7 80 42 fe 84 4c 89 f6 31 c0 e8 9b 30 18 02 0f 0b 48 c7 c7 e0 42 fe 84 4c 89 f6 31 c0 e8 88 30 18 02 <0f> 0b 48 c7 c7 40 43 fe 84 4c 89 f6 31 c0 e8 75 30 18 02 0f 0b 48 RSP: 0018:ffff8881e4b4f438 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000100 RCX: c85fa7b3ff0a2f00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000005 R08: ffffffff814e3a77 R09: ffffed103edcaa08 R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: dffffc0000000000 R13: ffff8881e15f3b60 R14: ffff8881e15f3be0 R15: dead000000000122 FS: 00007f6ed1ca7700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e7207f CR3: 00000001eb9f6000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400