INFO: task syz.1.2:312 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:312   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dcd20e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc625fa0 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc626038 R14: 00007f9dcc625fa0 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:319 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:319   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dcd1ed028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626090 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc626128 R14: 00007f9dcc626090 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:328 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:328   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dcd1cc028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626180 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc626218 R14: 00007f9dcc626180 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:330 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:330   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dcd1ab028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626270 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc626308 R14: 00007f9dcc626270 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:331 blocked for more than 124 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:331   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dcd18a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626360 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc6263f8 R14: 00007f9dcc626360 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:333 blocked for more than 124 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:333   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dca1f1028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626450 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc6264e8 R14: 00007f9dcc626450 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:336 blocked for more than 124 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:336   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dc9dce028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626540 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc6265d8 R14: 00007f9dcc626540 R15: 00007ffc5aba28b8
 </TASK>
INFO: task syz.1.2:339 blocked for more than 125 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2         state:D stack:0     pid:339   tgid:311   ppid:293    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6124 [inline]
 __schedule+0x16e0/0x2380 kernel/sched/core.c:7971
 __schedule_loop kernel/sched/core.c:8046 [inline]
 schedule+0xc1/0x170 kernel/sched/core.c:8061
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:8118
 rwsem_down_read_slowpath+0x88c/0x14c0 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 __super_lock fs/super.c:61 [inline]
 super_lock+0x25e/0x330 fs/super.c:123
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x86/0x570 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:939 [inline]
 __se_sys_quotactl+0x351/0x7e0 fs/quota/quota.c:918
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:918
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9dcc39fb19
RSP: 002b:00007f9dc99ab028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9dcc626630 RCX: 00007f9dcc39fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f9dcc437b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dcc6266c8 R14: 00007f9dcc626630 R15: 00007ffc5aba28b8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 fb4d83c2a69de87362621e77e54386714fae73a9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:114
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:63
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 cpumask_backtrace+0x1f/0x30 lib/nmi_backtrace.c:127
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1536 Comm: syz-executor Not tainted syzkaller #0 fb4d83c2a69de87362621e77e54386714fae73a9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:sb_is_blkdev_sb include/linux/fs.h:2833 [inline]
RIP: 0010:inode_to_bdi+0x51/0x100 mm/backing-dev.c:1209
Code: 28 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 e2 d2 15 00 4d 8b 36 48 c7 c0 60 48 23 87 48 c1 e8 03 42 80 3c 38 00 <74> 0c 48 c7 c7 60 48 23 87 e8 c1 d2 15 00 4c 3b 35 6a f4 55 05 74
RSP: 0018:ffffc90016337170 EFLAGS: 00000246
RAX: 1ffffffff0e4690c RBX: ffff8881192fb838 RCX: ffff8881209d13c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881192fb838
RBP: ffffc90016337188 R08: ffffea0004944dc7 R09: 1ffffd40009289b8
R10: dffffc0000000000 R11: fffff940009289b9 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881461cb000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe7148bffc CR3: 000000010d744000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 mapping_can_writeback include/linux/backing-dev.h:148 [inline]
 __folio_cancel_dirty+0x4d/0x250 mm/page-writeback.c:2961
 folio_cancel_dirty include/linux/pagemap.h:1271 [inline]
 truncate_cleanup_folio+0x2e0/0x3a0 mm/truncate.c:172
 truncate_inode_folio+0x59/0x80 mm/truncate.c:181
 shmem_undo_range+0x3e9/0x1400 mm/shmem.c:1075
 shmem_truncate_range mm/shmem.c:1208 [inline]
 shmem_evict_inode+0x286/0xaa0 mm/shmem.c:1336
 evict+0x519/0xaf0 fs/inode.c:731
 iput_final fs/inode.c:1890 [inline]
 iput+0x651/0x910 fs/inode.c:1916
 dentry_unlink_inode+0x379/0x430 fs/dcache.c:412
 __dentry_kill+0x1ad/0x5f0 fs/dcache.c:615
 shrink_kill fs/dcache.c:1060 [inline]
 shrink_dentry_list+0x2f4/0x500 fs/dcache.c:1087
 shrink_dcache_parent+0xb2/0x280 fs/dcache.c:-1
 do_one_tree fs/dcache.c:1550 [inline]
 shrink_dcache_for_umount+0x95/0x1a0 fs/dcache.c:1567
 generic_shutdown_super+0x6a/0x410 fs/super.c:625
 kill_anon_super+0x4b/0x1d0 fs/super.c:1243
 kill_litter_super+0x5a/0x70 fs/super.c:1253
 deactivate_locked_super+0xd5/0x270 fs/super.c:478
 deactivate_super+0xb8/0xe0 fs/super.c:511
 cleanup_mnt+0x438/0x4d0 fs/namespace.c:1380
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1387
 task_work_run+0x1e8/0x260 kernel/task_work.c:246
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa46/0x2850 kernel/exit.c:961
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1104
 __do_sys_exit_group kernel/exit.c:1115 [inline]
 __se_sys_exit_group kernel/exit.c:1113 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1113
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f050159fb19
Code: Unable to access opcode bytes at 0x7f050159faef.
RSP: 002b:00007ffc9cedbd48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f0501638ab0 RCX: 00007f050159fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f0501638ac2 R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000d
R13: 00000000000927c0 R14: 000000000002914a R15: 00007ffc9cedbef0
 </TASK>