INFO: task syz-executor:11763 blocked for more than 143 seconds. Not tainted 6.10.0-rc7-next-20240710-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20592 pid:11763 tgid:11763 ppid:1 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5239 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6603 __schedule_loop kernel/sched/core.c:6680 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6695 netfs_wait_for_outstanding_io include/linux/netfs.h:535 [inline] v9fs_evict_inode+0x171/0x360 fs/9p/vfs_inode.c:352 evict+0x2a8/0x630 fs/inode.c:669 __dentry_kill+0x20d/0x630 fs/dcache.c:607 dput+0x19f/0x2b0 fs/dcache.c:849 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1559 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620 kill_anon_super+0x3b/0x70 fs/super.c:1226 v9fs_kill_super+0x4c/0x90 fs/9p/vfs_super.c:193 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1372 task_work_run+0x24f/0x310 kernel/task_work.c:204 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd8e5f76f07 RSP: 002b:00007ffcbd83c088 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd8e5f76f07 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcbd83c140 RBP: 00007ffcbd83c140 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcbd83d200 R13: 00007fd8e5fe3515 R14: 000000000003a49d R15: 000000000003a05f </TASK> INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-next-20240710-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 15955 Comm: syz.3.3409 Not tainted 6.10.0-rc7-next-20240710-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__do_kmalloc_node mm/slub.c:4169 [inline] RIP: 0010:__kmalloc_noprof+0x99/0x400 mm/slub.c:4184 Code: 0f b6 83 30 06 df 8d eb 0a b8 ff ff ff ff 0f bd c1 ff c0 89 c3 83 f8 0e 0f 83 82 02 00 00 49 6b c6 70 4c 8b ac d8 70 04 df 8d <8b> 1d 21 2a c0 0d 44 21 e3 89 df e8 37 c9 fd ff 89 df e8 80 ca fd RSP: 0018:ffffc90008aff908 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000000001c RDX: ffffc9000d1ae000 RSI: 0000000000000d40 RDI: 000000000000001d RBP: 000000000000001d R08: ffffffff8467dfee R09: 1ffffffff1f5f87d R10: dffffc0000000000 R11: fffffbfff1f5f87e R12: 0000000000000d40 R13: ffff888015041780 R14: 0000000000000000 R15: ffffffff8467e07f FS: 00007f8aa280c6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f18ff0d1178 CR3: 000000005bab0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <TASK> kmalloc_noprof include/linux/slab.h:685 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723 tomoyo_path_mkdir+0xe7/0x130 security/tomoyo/tomoyo.c:179 security_path_mkdir+0xe8/0x140 security/security.c:1824 do_mkdirat+0x1c4/0x3a0 fs/namei.c:4187 __do_sys_mkdirat fs/namei.c:4205 [inline] __se_sys_mkdirat fs/namei.c:4203 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4203 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: 0033:0x7f8aa1974517 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f8aa280be78 EFLAGS: 00000206 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f8aa280bf00 RCX: 00007f8aa1974517 RDX: 00000000000001ff RSI: 0000000020000180 RDI: 00000000ffffff9c RBP: 0000000020000000 R08: 0000000000000000 R09: 000000000000616c R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000180 R13: 00007f8aa280bec0 R14: 0000000000006172 R15: 0000000020000040 </TASK>