[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.260692] random: sshd: uninitialized urandom read (32 bytes read) [ 35.606845] kauditd_printk_skb: 10 callbacks suppressed [ 35.606854] audit: type=1400 audit(1577928555.806:35): avc: denied { map } for pid=7002 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 35.715243] random: sshd: uninitialized urandom read (32 bytes read) [ 36.321082] random: sshd: uninitialized urandom read (32 bytes read) [ 36.965935] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.32' (ECDSA) to the list of known hosts. [ 42.539149] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.652483] audit: type=1400 audit(1577928562.856:36): avc: denied { map } for pid=7014 comm="syz-executor679" path="/root/syz-executor679939913" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.843703] [ 42.845463] ===================================== [ 42.850374] WARNING: bad unlock balance detected! [ 42.855235] 4.14.161-syzkaller #0 Not tainted [ 42.859718] ------------------------------------- [ 42.864555] kworker/u4:2/64 is trying to release lock (&file->mut) at: [ 42.871219] [] ucma_event_handler+0x6be/0xe20 [ 42.877336] but there are no more locks to release! [ 42.882539] [ 42.882539] other info that might help us debug this: [ 42.889188] 4 locks held by kworker/u4:2/64: [ 42.893572] #0: ("ib_addr"){+.+.}, at: [] process_one_work+0x76e/0x1600 [ 42.902181] #1: ((&(&req->work)->work)){+.+.}, at: [] process_one_work+0x7ab/0x1600 [ 42.911991] #2: (&id_priv->handler_mutex){+.+.}, at: [] addr_handler+0xa6/0x2b0 [ 42.921300] #3: (&file->mut){+.+.}, at: [] ucma_event_handler+0xbd/0xe20 [ 42.929979] [ 42.929979] stack backtrace: [ 42.934462] CPU: 0 PID: 64 Comm: kworker/u4:2 Not tainted 4.14.161-syzkaller #0 [ 42.941885] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.951230] Workqueue: ib_addr process_one_req [ 42.955800] Call Trace: [ 42.958479] dump_stack+0x142/0x197 [ 42.963261] ? ucma_event_handler+0x6be/0xe20 [ 42.967887] print_unlock_imbalance_bug.cold+0x114/0x123 [ 42.973340] ? ucma_event_handler+0x6be/0xe20 [ 42.977819] lock_release+0x616/0x940 [ 42.981624] ? lock_downgrade+0x740/0x740 [ 42.985775] __mutex_unlock_slowpath+0x71/0x800 [ 42.990451] ? rdma_ah_conv_opa_to_ib+0x4c0/0x4c0 [ 42.995297] ? rcu_read_lock_sched_held+0x110/0x130 [ 43.000295] ? wait_for_completion+0x420/0x420 [ 43.004862] mutex_unlock+0xd/0x10 [ 43.014300] ucma_event_handler+0x6be/0xe20 [ 43.018613] addr_handler+0x1db/0x2b0 [ 43.022395] ? cma_work_handler+0x1d0/0x1d0 [ 43.026712] process_one_req+0x239/0x590 [ 43.030865] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 43.036300] process_one_work+0x863/0x1600 executing program executing program executing program executing program executing program [ 43.040701] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 43.045365] worker_thread+0x5d9/0x1050 [ 43.049320] kthread+0x319/0x430 [ 43.052667] ? process_one_work+0x1600/0x1600 [ 43.057141] ? kthread_create_on_node+0xd0/0xd0 [ 43.061791] ret_from_fork+0x24/0x30 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program