[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[   11.275833] random: crng init done
Starting mcstransd: 
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.149' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   18.751301] 
[   18.752114] ===============================
[   18.753577] [ INFO: suspicious RCU usage. ]
[   18.754517] 4.9.202+ #0 Not tainted
[   18.755405] -------------------------------
[   18.756289] include/linux/radix-tree.h:199 suspicious rcu_dereference_check() usage!
[   18.758260] 
[   18.758260] other info that might help us debug this:
[   18.758260] 
[   18.760686] 
[   18.760686] rcu_scheduler_active = 2, debug_locks = 0
[   18.762412] 2 locks held by syz-executor184/2062:
[   18.763446]  #0:  (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [<00000000e5465ac4>] shmem_add_seals+0x166/0x1020
[   18.766222]  #1:  (&(&mapping->tree_lock)->rlock){..-...}, at: [<000000008749736d>] shmem_add_seals+0x342/0x1020
[   18.768340] 
[   18.768340] stack backtrace:
[   18.768966] CPU: 1 PID: 2062 Comm: syz-executor184 Not tainted 4.9.202+ #0
[   18.770579]  ffff8801cf257ca0 ffffffff81b55d2b ffff8801c977ec28 0000000000000000
[   18.776737]  0000000000000002 00000000000000c7 ffff8801d209df00 ffff8801cf257cd0
[   18.784761]  ffffffff81406867 ffffea00074d45c0 dffffc0000000000 ffff8801cf257d78
[   18.792778] Call Trace:
[   18.795347]  [<000000000d8f2bba>] dump_stack+0xcb/0x130
[   18.800693]  [<00000000ff27527b>] lockdep_rcu_suspicious.cold+0x10a/0x149
[   18.807618]  [<0000000019b3d172>] shmem_add_seals+0xa44/0x1020
[   18.813581]  [<0000000055e6b381>] ? __vfs_read+0x550/0x550
[   18.819217]  [<00000000fc2f3431>] ? shmem_file_llseek+0x250/0x250
[   18.825543]  [<00000000ea15e919>] ? vfs_write+0x366/0x520
[   18.831084]  [<00000000e7764f5d>] ? debug_lockdep_rcu_enabled+0x71/0xa0
[   18.837827]  [<00000000d39e028a>] ? selinux_file_fcntl+0x6c/0x120
[   18.844047]  [<000000003a7a5a43>] shmem_fcntl+0xf7/0x130
[   18.849566]  [<0000000