non-paged memory list_del corruption, ffff888077eb8830->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:56! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 9344 Comm: syz.3.886 Not tainted 6.15.0-rc6-syzkaller-00080-g1a80a098c606 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__list_del_entry_valid_or_report+0x121/0x200 lib/list_debug.c:56 Code: 48 c7 c7 60 8c f4 8b e8 bd 3e c4 fc 90 0f 0b 4c 89 e7 e8 02 06 28 fd 4c 89 e2 48 89 de 48 c7 c7 c0 8c f4 8b e8 a0 3e c4 fc 90 <0f> 0b 48 89 ef e8 e5 05 28 fd 48 89 ea 48 89 de 48 c7 c7 20 8d f4 RSP: 0018:ffffc900032d76b8 EFLAGS: 00010282 RAX: 000000000000004e RBX: ffff888077eb8830 RCX: ffffc9000e411000 RDX: 0000000000000000 RSI: ffffffff819b24b6 RDI: 0000000000000005 RBP: dead000000000122 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000001 R12: dead000000000100 R13: 0000000000000005 R14: ffff888077eb8830 R15: ffff888077eb8838 FS: 00007f7f1b6496c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555592b625c8 CR3: 0000000032c08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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+0xa2/0x2a0 net/9p/trans_fd.c:740 p9_client_flush.isra.0+0x349/0x420 net/9p/client.c:618 p9_client_rpc+0xaab/0xc50 net/9p/client.c:741 p9_client_version net/9p/client.c:930 [inline] p9_client_create+0xc2d/0x11c0 net/9p/client.c:1036 v9fs_session_init+0x1f7/0x1a80 fs/9p/v9fs.c:410 v9fs_mount+0xc5/0xa30 fs/9p/vfs_super.c:122 legacy_get_tree+0x10c/0x220 fs/fs_context.c:662 vfs_get_tree+0x8e/0x340 fs/super.c:1759 do_new_mount fs/namespace.c:3881 [inline] path_mount+0x14d4/0x1f20 fs/namespace.c:4208 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount fs/namespace.c:4409 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7f1a78e969 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:00007f7f1b649038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7f1a9b6160 RCX: 00007f7f1a78e969 RDX: 0000200000000080 RSI: 0000200000000180 RDI: 0000000000000000 RBP: 00007f7f1a810ab1 R08: 0000200000000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7f1a9b6160 R15: 00007ffd286cc3c8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x121/0x200 lib/list_debug.c:56 Code: 48 c7 c7 60 8c f4 8b e8 bd 3e c4 fc 90 0f 0b 4c 89 e7 e8 02 06 28 fd 4c 89 e2 48 89 de 48 c7 c7 c0 8c f4 8b e8 a0 3e c4 fc 90 <0f> 0b 48 89 ef e8 e5 05 28 fd 48 89 ea 48 89 de 48 c7 c7 20 8d f4 RSP: 0018:ffffc900032d76b8 EFLAGS: 00010282 RAX: 000000000000004e RBX: ffff888077eb8830 RCX: ffffc9000e411000 RDX: 0000000000000000 RSI: ffffffff819b24b6 RDI: 0000000000000005 RBP: dead000000000122 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000001 R12: dead000000000100 R13: 0000000000000005 R14: ffff888077eb8830 R15: ffff888077eb8838 FS: 00007f7f1b6496c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555592b625c8 CR3: 0000000032c08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400