RDX: 00000000200013c0 RSI: 0000000020001380 RDI: 0000000000020400
RBP: 00007f344960b08d R08: 0000000020001440 R09: 0000000020001440
R10: 0000000020001400 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffd3fba7fef R14: 00007f3447ec3300 R15: 0000000000022000
INFO: task syz-executor.3:5691 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28576  5691   8142 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
 rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:72
 namespace_lock fs/namespace.c:1370 [inline]
 copy_mnt_ns+0x15d/0xad0 fs/namespace.c:2915
 create_new_namespaces+0xd6/0x7b0 kernel/nsproxy.c:75
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219