[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.222' (ECDSA) to the list of known hosts. 2020/09/18 07:34:13 fuzzer started 2020/09/18 07:34:13 connecting to host at 10.128.0.105:44943 2020/09/18 07:34:13 checking machine... 2020/09/18 07:34:13 checking revisions... 2020/09/18 07:34:13 testing simple program... syzkaller login: [ 36.299124] audit: type=1400 audit(1600414453.622:8): avc: denied { execmem } for pid=6373 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 36.354675] IPVS: ftp: loaded support on port[0] = 21 2020/09/18 07:34:13 building call list... [ 36.990266] ================================================================================ [ 36.999017] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 37.005922] member access within null pointer of type 'struct crypto_shash' [ 37.013101] CPU: 1 PID: 29 Comm: kworker/u4:2 Not tainted 4.14.198-syzkaller #0 [ 37.020534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.029907] Workqueue: netns cleanup_net [ 37.033958] Call Trace: [ 37.036540] dump_stack+0x21b/0x32e [ 37.040163] ? dma_virt_alloc+0x82/0x82 [ 37.044133] ? ubsan_prologue+0x29/0x50 [ 37.048103] ubsan_epilogue+0xe/0x3a [ 37.051811] handle_null_ptr_deref+0x78/0x80 [ 37.056210] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 37.061483] sctp_destruct_sock+0x70/0x80 [ 37.065623] ? sctp_accept+0x730/0x730 [ 37.069500] __sk_destruct+0x93/0x8e0 [ 37.073342] ? proto_unregister+0x5e0/0x5e0 [ 37.077655] ? mark_held_locks+0xc4/0x120 [ 37.082749] __sk_free+0xf4/0x370 [ 37.086194] sk_free+0x30/0x50 [ 37.089382] sctp_close+0x667/0x940 [ 37.093022] ? sctp_init_sock+0x1430/0x1430 [ 37.097351] ? do_raw_spin_unlock+0x1e0/0x310 [ 37.101884] ? ip_mc_drop_socket+0x16/0x270 [ 37.106211] inet_release+0xfe/0x230 [ 37.109926] inet6_release+0x51/0x80 [ 37.113631] __sock_release+0x236/0x330 [ 37.117592] sctp_ctrlsock_exit+0x67/0x90 [ 37.121734] ops_exit_list+0x9a/0x190 [ 37.125527] cleanup_net+0x4a3/0xd30 [ 37.129246] ? net_drop_ns+0x90/0x90 [ 37.132962] process_one_work+0x7ac/0x1890 [ 37.137247] ? pwq_dec_nr_in_flight+0x360/0x360 [ 37.141913] ? lock_acquire+0x197/0x510 [ 37.145883] ? rwlock_bug.part.0+0xe0/0xe0 [ 37.150111] ? worker_thread+0x1e0/0x1330 [ 37.154256] worker_thread+0x6c1/0x1330 [ 37.158237] ? process_one_work+0x1890/0x1890 [ 37.162742] ? process_one_work+0x1890/0x1890 [ 37.167229] kthread+0x35e/0x530 [ 37.170589] ? kthread_create_on_node+0xd0/0xd0 [ 37.175255] ret_from_fork+0x24/0x30 [ 37.178967] ================================================================================ [ 37.378484] can: request_module (can-proto-0) failed. [ 37.390533] can: request_module (can-proto-0) failed. [ 37.403904] can: request_module (can-proto-0) failed. [ 37.454358] audit: type=1400 audit(1600414454.773:9): avc: denied { create } for pid=6357 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1