[ 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 '10.128.0.169' (ECDSA) to the list of known hosts. 2020/09/22 08:34:34 fuzzer started 2020/09/22 08:34:34 connecting to host at 10.128.0.105:41087 2020/09/22 08:34:34 checking machine... 2020/09/22 08:34:34 checking revisions... 2020/09/22 08:34:34 testing simple program... syzkaller login: [ 38.426560] audit: type=1400 audit(1600763674.720:8): 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 [ 38.495486] IPVS: ftp: loaded support on port[0] = 21 2020/09/22 08:34:34 building call list... [ 39.133130] ================================================================================ [ 39.141836] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 39.148579] member access within null pointer of type 'struct crypto_shash' [ 39.155670] CPU: 0 PID: 3016 Comm: kworker/u4:4 Not tainted 4.14.198-syzkaller #0 [ 39.163365] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.172729] Workqueue: netns cleanup_net [ 39.176783] Call Trace: [ 39.179369] dump_stack+0x21b/0x32e [ 39.182993] ? dma_virt_alloc+0x82/0x82 [ 39.186960] ? ubsan_prologue+0x29/0x50 [ 39.190932] ubsan_epilogue+0xe/0x3a [ 39.194652] handle_null_ptr_deref+0x78/0x80 [ 39.199054] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 39.204418] sctp_destruct_sock+0x70/0x80 [ 39.208580] ? sctp_accept+0x730/0x730 [ 39.212459] __sk_destruct+0x93/0x8e0 [ 39.216256] ? proto_unregister+0x5e0/0x5e0 [ 39.220584] ? mark_held_locks+0xc4/0x120 [ 39.224729] __sk_free+0xf4/0x370 [ 39.228174] sk_free+0x30/0x50 [ 39.231361] sctp_close+0x667/0x940 [ 39.235004] ? sctp_init_sock+0x1430/0x1430 [ 39.239320] ? do_raw_spin_unlock+0x1e0/0x310 [ 39.243813] ? ip_mc_drop_socket+0x16/0x270 [ 39.248143] inet_release+0xfe/0x230 [ 39.251873] inet6_release+0x51/0x80 [ 39.255589] __sock_release+0x236/0x330 [ 39.259572] sctp_ctrlsock_exit+0x67/0x90 [ 39.263737] ops_exit_list+0x9a/0x190 [ 39.267547] cleanup_net+0x4a3/0xd30 [ 39.271263] ? net_drop_ns+0x90/0x90 [ 39.274982] process_one_work+0x7ac/0x1890 [ 39.279214] ? pwq_dec_nr_in_flight+0x360/0x360 [ 39.283874] ? lock_acquire+0x197/0x510 [ 39.287853] ? rwlock_bug.part.0+0xe0/0xe0 [ 39.292082] ? worker_thread+0x1e0/0x1330 [ 39.296226] worker_thread+0x6c1/0x1330 [ 39.300204] ? process_one_work+0x1890/0x1890 [ 39.304699] ? process_one_work+0x1890/0x1890 [ 39.309183] kthread+0x35e/0x530 [ 39.312541] ? kthread_create_on_node+0xd0/0xd0 [ 39.317203] ret_from_fork+0x24/0x30 [ 39.320929] ================================================================================ [ 39.642762] can: request_module (can-proto-0) failed. [ 39.667027] can: request_module (can-proto-0) failed. [ 39.686772] can: request_module (can-proto-0) failed. [ 39.768029] audit: type=1400 audit(1600763676.061:9): 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