INFO: task syz.3.7417:22796 blocked for more than 122 seconds.
      Not tainted 6.12.38-syzkaller-ge9bbc29c066a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.7417      state:D stack:0     pid:22796 tgid:22795 ppid:22137  flags:0x00004004
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_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 rcu_barrier+0x415/0x530 kernel/rcu/tree.c:4657
 flush_rcu_work+0x71/0x90 kernel/workqueue.c:4292
 kvfree_rcu_barrier+0x23c/0x2f0 kernel/rcu/tree.c:3955
 kmem_cache_destroy+0x32/0x170 mm/slab_common.c:490
 p9_client_destroy+0x42b/0x480 net/9p/client.c:1088
 v9fs_session_close+0x52/0x1d0 fs/9p/v9fs.c:506
 v9fs_kill_super+0x60/0x90 fs/9p/vfs_super.c:196
 deactivate_locked_super+0xd8/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1370
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1377
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 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+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f1f7438e9a9
RSP: 002b:00007f1f75270038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: fffffffffffffffe RBX: 00007f1f745b5fa0 RCX: 00007f1f7438e9a9
RDX: 0000200000004500 RSI: 0000200000000200 RDI: 0000000000000000
RBP: 00007f1f74410d69 R08: 0000200000000140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1f745b5fa0 R15: 00007ffcf9bfc238
 </TASK>
INFO: task syz.0.7426:22826 blocked for more than 130 seconds.
      Not tainted 6.12.38-syzkaller-ge9bbc29c066a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.7426      state:D stack:0     pid:22826 tgid:22825 ppid:18131  flags:0x00004004
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
 __mutex_lock_common kernel/locking/mutex.c:707 [inline]
 __mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
 __mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
 mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
 rcu_barrier+0x4d/0x530 kernel/rcu/tree.c:4589
 flush_rcu_work+0x71/0x90 kernel/workqueue.c:4292
 kvfree_rcu_barrier+0x23c/0x2f0 kernel/rcu/tree.c:3955
 kmem_cache_destroy+0x32/0x170 mm/slab_common.c:490
 p9_client_destroy+0x42b/0x480 net/9p/client.c:1088
 v9fs_session_init+0x13b7/0x1820 fs/9p/v9fs.c:490
 v9fs_mount+0xd7/0xa00 fs/9p/vfs_super.c:122
 legacy_get_tree+0x106/0x1b0 fs/fs_context.c:662
 vfs_get_tree+0x9e/0x290 fs/super.c:1817
 do_new_mount+0x251/0xb40 fs/namespace.c:3526
 path_mount+0x688/0x1050 fs/namespace.c:3853
 do_mount fs/namespace.c:3866 [inline]
 __do_sys_mount fs/namespace.c:4076 [inline]
 __se_sys_mount+0x2bd/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: 0033:0x7f5db158e9a9
RSP: 002b:00007f5db2406038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5db17b5fa0 RCX: 00007f5db158e9a9
RDX: 0000200000000180 RSI: 00002000000001c0 RDI: 0000000000000000
RBP: 00007f5db1610d69 R08: 0000200000000080 R09: 0000000000000000