Warning: Permanently added '10.128.0.226' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   18.725890] 
[   18.726437] ===============================
[   18.727255] [ INFO: suspicious RCU usage. ]
[   18.728088] 4.9.202+ #0 Not tainted
[   18.728837] -------------------------------
[   18.730143] include/linux/radix-tree.h:199 suspicious rcu_dereference_check() usage!
[   18.732536] 
[   18.732536] other info that might help us debug this:
[   18.732536] 
[   18.734223] 
[   18.734223] rcu_scheduler_active = 2, debug_locks = 0
[   18.735769] 2 locks held by syz-executor234/2038:
[   18.736764]  #0:  (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [<000000003e6b3d62>] shmem_add_seals+0x166/0x1020
[   18.739185]  #1:  (&(&mapping->tree_lock)->rlock){..-...}, at: [<00000000b68af91c>] shmem_add_seals+0x342/0x1020
[   18.741839] 
[   18.741839] stack backtrace:
[   18.743043] CPU: 1 PID: 2038 Comm: syz-executor234 Not tainted 4.9.202+ #0
[   18.744966]  ffff8801cf06fca0 ffffffff81b55d2b ffff8801cf0c42c8 0000000000000000
[   18.749604]  0000000000000002 00000000000000c7 ffff8801d1d9c740 ffff8801cf06fcd0
[   18.757651]  ffffffff81406867 ffffea000748b3c0 dffffc0000000000 ffff8801cf06fd78
[   18.765674] Call Trace:
[   18.768262]  [<00000000f81e9fb9>] dump_stack+0xcb/0x130
[   18.773641]  [<00000000f827df8c>] lockdep_rcu_suspicious.cold+0x10a/0x149
[   18.780546]  [<0000000093ce2d28>] shmem_add_seals+0xa44/0x1020
[   18.786495]  [<000000009b3c793d>] ? __vfs_read+0x550/0x550
[   18.792095]  [<00000000828dea01>] ? shmem_file_llseek+0x250/0x250
[   18.798305]  [<00000000742207ff>] ? vfs_write+0x366/0x520
[   18.803827]  [<00000000f0b92427>] ? debug_lockdep_rcu_enabled+0x71/0xa0
[   18.810563]  [<00000000fc267308>] ? selinux_file_fcntl+0x6c/0x120
[   18.816787]  [<00000000ac2fef53>] shmem_fcntl+0xf7/0x130
[   18.822227]  [<00000000cc3389a1>] SyS_fcntl+0