INFO: task syz.2.16:479 blocked for more than 122 seconds.
      Not tainted 6.12.38-syzkaller-08792-g47365056686e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.16        state:D stack:0     pid:479   tgid:477   ppid:467    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
 rwsem_down_read_slowpath+0x6d1/0x1460 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x8f/0xe0 kernel/locking/rwsem.c:1607
 inode_lock_shared include/linux/fs.h:825 [inline]
 lookup_slow+0x4a/0x80 fs/namei.c:1748
 walk_component+0x302/0x440 fs/namei.c:2053
 lookup_last fs/namei.c:2556 [inline]
 path_lookupat+0x180/0x4a0 fs/namei.c:2580
 filename_lookup+0x1f5/0x520 fs/namei.c:2609
 user_path_at+0x42/0x60 fs/namei.c:3016
 do_mount fs/namespace.c:3863 [inline]
 __do_sys_mount fs/namespace.c:4076 [inline]
 __se_sys_mount+0x288/0x480 fs/namespace.c:4053
 __x64_sys_mount+0xc3/0xf0 fs/namespace.c:4053
 x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff7f9b8e929
RSP: 002b:00007ff7faaa8038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff7f9db6080 RCX: 00007ff7f9b8e929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007ff7f9c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff7f9db6080 R15: 00007fff312c6ed8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-08792-g47365056686e #0 6d93cc409e0a6db4f480e1600d4c4bf70d3d28d5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.38-syzkaller-08792-g47365056686e #0 6d93cc409e0a6db4f480e1600d4c4bf70d3d28d5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:asm_sysvec_call_function_single+0x4/0x30 arch/x86/include/asm/idtentry.h:709
Code: e8 e1 04 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 e8 61 69 e6 ff e9 0c 06 00 00 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <0f> 01 ca fc 6a ff e8 b1 04 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7
RSP: 0018:ffffc900001a7dd8 EFLAGS: 000000c6
RAX: ffff8881f6f00000 RBX: ffff88810366b900 RCX: ffffffff8586909e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000003de74
RBP: ffffc900001a7e00 R08: ffff8881f6f39733 R09: 1ffff1103ede72e6
R10: dffffc0000000000 R11: ffffed103ede72e7 R12: 1ffff110206cd720
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff87ca8b28
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555655cd4a8 CR3: 000000010b3fc000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x1a0/0x470 kernel/sched/idle.c:326
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>