Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.662568] audit: type=1400 audit(1602584096.642:8): avc: denied { execmem } for pid=6373 comm="syz-executor803" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.699007] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 33.711224] ================================================================== [ 33.718692] BUG: KASAN: use-after-free in padata_parallel_worker+0x2b0/0x2e0 [ 33.725860] Write of size 8 at addr ffff8880a94e2a98 by task kworker/0:1/24 [ 33.732935] [ 33.734562] CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.198-syzkaller #0 [ 33.741919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.751277] Workqueue: pencrypt padata_parallel_worker [ 33.756532] Call Trace: [ 33.759099] dump_stack+0x1b2/0x283 [ 33.762708] print_address_description.cold+0x54/0x1d3 [ 33.767978] kasan_report_error.cold+0x8a/0x194 [ 33.772642] ? padata_parallel_worker+0x2b0/0x2e0 [ 33.777462] __asan_report_store8_noabort+0x68/0x70 [ 33.782479] ? padata_parallel_worker+0x2b0/0x2e0 [ 33.787302] padata_parallel_worker+0x2b0/0x2e0 [ 33.791965] ? lock_acquire+0x170/0x3f0 [ 33.796011] ? invoke_padata_reorder+0x40/0x40 [ 33.800574] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 33.806007] process_one_work+0x793/0x14a0 [ 33.810226] ? work_busy+0x320/0x320 [ 33.813944] ? worker_thread+0x158/0xff0 [ 33.817998] ? _raw_spin_unlock_irq+0x24/0x80 [ 33.822480] worker_thread+0x5cc/0xff0 [ 33.826357] ? rescuer_thread+0xc80/0xc80 [ 33.830508] kthread+0x30d/0x420 [ 33.833853] ? kthread_create_on_node+0xd0/0xd0 [ 33.838854] ret_from_fork+0x24/0x30 [ 33.842551] [ 33.844156] Allocated by task 6373: [ 33.847765] kasan_kmalloc+0xeb/0x160 [ 33.851547] __kmalloc+0x15a/0x400 [ 33.855081] tls_push_record+0xfa/0x1270 [ 33.859131] tls_sw_sendmsg+0xbb0/0xfd0 [ 33.863083] inet_sendmsg+0x11a/0x4e0 [ 33.866863] sock_sendmsg+0xb5/0x100 [ 33.870553] SyS_sendto+0x1c7/0x2c0 [ 33.874172] do_syscall_64+0x1d5/0x640 [ 33.878037] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.883204] [ 33.884808] Freed by task 6373: [ 33.888065] kasan_slab_free+0xc3/0x1a0 [ 33.892016] kfree+0xc9/0x250 [ 33.895118] tls_push_record+0xc3b/0x1270 [ 33.899257] tls_sw_sendmsg+0xbb0/0xfd0 [ 33.903209] inet_sendmsg+0x11a/0x4e0 [ 33.907004] sock_sendmsg+0xb5/0x100 [ 33.910717] SyS_sendto+0x1c7/0x