[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. 2020/09/26 23:16:18 fuzzer started 2020/09/26 23:16:18 connecting to host at 10.128.0.105:44717 2020/09/26 23:16:18 checking machine... 2020/09/26 23:16:18 checking revisions... 2020/09/26 23:16:18 testing simple program... syzkaller login: [ 38.100502] audit: type=1400 audit(1601162178.425:8): avc: denied { execmem } for pid=6380 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.157569] IPVS: ftp: loaded support on port[0] = 21 2020/09/26 23:16:18 building call list... [ 38.793717] ================================================================================ [ 38.802498] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 38.809250] member access within null pointer of type 'struct crypto_shash' [ 38.816351] CPU: 1 PID: 4220 Comm: kworker/u4:5 Not tainted 4.14.199-syzkaller #0 [ 38.823967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.833333] Workqueue: netns cleanup_net [ 38.837393] Call Trace: [ 38.840000] dump_stack+0x21b/0x32e [ 38.843627] ? dma_virt_alloc+0x82/0x82 [ 38.847597] ? ubsan_prologue+0x29/0x50 [ 38.851577] ubsan_epilogue+0xe/0x3a [ 38.855292] handle_null_ptr_deref+0x78/0x80 [ 38.859705] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 38.864987] sctp_destruct_sock+0x70/0x80 [ 38.869134] ? sctp_accept+0x730/0x730 [ 38.873019] __sk_destruct+0x93/0x8e0 [ 38.876831] ? proto_unregister+0x5e0/0x5e0 [ 38.881149] ? mark_held_locks+0xc4/0x120 [ 38.885312] __sk_free+0xf4/0x370 [ 38.888774] sk_free+0x30/0x50 [ 38.891964] sctp_close+0x667/0x940 [ 38.895593] ? sctp_init_sock+0x1430/0x1430 [ 38.899925] ? do_raw_spin_unlock+0x1e0/0x310 [ 38.904432] ? ip_mc_drop_socket+0x16/0x270 [ 38.908759] inet_release+0xfe/0x230 [ 38.912474] inet6_release+0x51/0x80 [ 38.916185] __sock_release+0x236/0x330 [ 38.920183] sctp_ctrlsock_exit+0x67/0x90 [ 38.924332] ops_exit_list+0x9a/0x190 [ 38.928134] cleanup_net+0x4a3/0xd30 [ 38.931864] ? net_drop_ns+0x90/0x90 [ 38.935592] process_one_work+0x7ac/0x1890 [ 38.939846] ? pwq_dec_nr_in_flight+0x360/0x360 [ 38.944539] ? lock_acquire+0x197/0x510 [ 38.948507] ? rwlock_bug.part.0+0xe0/0xe0 [ 38.952756] ? worker_thread+0x1e0/0x1330 [ 38.956923] worker_thread+0x6c1/0x1330 [ 38.960903] ? process_one_work+0x1890/0x1890 [ 38.965530] ? process_one_work+0x1890/0x1890 [ 38.970027] kthread+0x35e/0x530 [ 38.973436] ? kthread_create_on_node+0xd0/0xd0 [ 38.978122] ret_from_fork+0x24/0x30 [ 38.981840] ================================================================================ [ 39.345827] can: request_module (can-proto-0) failed. [ 39.367948] can: request_module (can-proto-0) failed. [ 39.379998] can: request_module (can-proto-0) failed. [ 39.433629] audit: type=1400 audit(1601162179.766:9): avc: denied { create } for pid=6364 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1