INFO: task syz-executor.5:29817 blocked for more than 140 seconds.
      Not tainted 4.14.172-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28688 29817   7665 0x80000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:66 [inline]
 down_read+0x45/0xa0 kernel/locking/rwsem.c:26
 exit_mm kernel/exit.c:511 [inline]
 do_exit+0x57e/0x2b00 kernel/exit.c:845
 do_group_exit+0x100/0x310 kernel/exit.c:955
 get_signal+0x385/0x1ca0 kernel/signal.c:2418
 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814