INFO: task syz.5.13762:26997 blocked for more than 511 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.13762     state:D stack:0     pid:26997 tgid:26996 ppid:23310  task_flags:0x400140 flags:0x00000001
dump_backtrace(regs = 0000000000000000 tsk = 000000002a7bc146)
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x135c/0x2b00 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7376
 cgroup_lock_and_drain_offline+0x490/0x604 kernel/cgroup/cgroup.c:3350
 cgroup1_get_tree+0xa0/0x7d8 kernel/cgroup/cgroup-v1.c:1265
 vfs_get_tree+0x90/0x28c fs/super.c:1932
 fc_mount+0x24/0xac fs/namespace.c:1278
 do_new_mount_fc fs/namespace.c:3885 [inline]
 do_new_mount+0x2a4/0x538 fs/namespace.c:3961
 path_mount+0x5f0/0xa88 fs/namespace.c:4312
 do_mount+0xe8/0x148 fs/namespace.c:4325
 __do_sys_mount fs/namespace.c:4543 [inline]
 __se_sys_mount fs/namespace.c:4520 [inline]
 __arm64_sys_mount+0x33c/0x388 fs/namespace.c:4520
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
INFO: task syz.5.13762:27010 blocked for more than 511 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.13762     state:D stack:0     pid:27010 tgid:26996 ppid:23310  task_flags:0x400140 flags:0x00800001
dump_backtrace(regs = 0000000000000000 tsk = 00000000b6936100)
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x135c/0x2b00 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7376
 cgroup_lock_and_drain_offline+0x490/0x604 kernel/cgroup/cgroup.c:3350
 cgroup1_get_tree+0xa0/0x7d8 kernel/cgroup/cgroup-v1.c:1265
 vfs_get_tree+0x90/0x28c fs/super.c:1932
 fc_mount+0x24/0xac fs/namespace.c:1278
 do_new_mount_fc fs/namespace.c:3885 [inline]
 do_new_mount+0x2a4/0x538 fs/namespace.c:3961
 path_mount+0x5f0/0xa88 fs/namespace.c:4312
 do_mount+0xe8/0x148 fs/namespace.c:4325
 __do_sys_mount fs/namespace.c:4543 [inline]
 __se_sys_mount fs/namespace.c:4520 [inline]
 __arm64_sys_mount+0x33c/0x388 fs/namespace.c:4520
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
INFO: lockdep is turned off.