[ 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 '10.128.0.63' (ECDSA) to the list of known hosts. 2020/09/21 20:10:51 fuzzer started 2020/09/21 20:10:51 connecting to host at 10.128.0.105:45447 2020/09/21 20:10:51 checking machine... 2020/09/21 20:10:51 checking revisions... 2020/09/21 20:10:51 testing simple program... syzkaller login: [ 36.379620] audit: type=1400 audit(1600719051.995:8): avc: denied { execmem } for pid=6372 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 36.432748] IPVS: ftp: loaded support on port[0] = 21 2020/09/21 20:10:52 building call list... [ 37.026638] ================================================================================ [ 37.035464] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 37.042213] member access within null pointer of type 'struct crypto_shash' [ 37.049304] CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.198-syzkaller #0 [ 37.056738] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.066089] Workqueue: netns cleanup_net [ 37.070158] Call Trace: [ 37.073347] dump_stack+0x21b/0x32e [ 37.076966] ? dma_virt_alloc+0x82/0x82 [ 37.080931] ? ubsan_prologue+0x29/0x50 [ 37.084907] ubsan_epilogue+0xe/0x3a [ 37.088614] handle_null_ptr_deref+0x78/0x80 [ 37.093012] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 37.098286] sctp_destruct_sock+0x70/0x80 [ 37.102431] ? sctp_accept+0x730/0x730 [ 37.106309] __sk_destruct+0x93/0x8e0 [ 37.110102] ? proto_unregister+0x5e0/0x5e0 [ 37.114414] ? mark_held_locks+0xc4/0x120 [ 37.118552] __sk_free+0xf4/0x370 [ 37.121993] sk_free+0x30/0x50 [ 37.125176] sctp_close+0x667/0x940 [ 37.128798] ? sctp_init_sock+0x1430/0x1430 [ 37.133109] ? do_raw_spin_unlock+0x1e0/0x310 [ 37.137599] ? ip_mc_drop_socket+0x16/0x270 [ 37.141913] inet_release+0xfe/0x230 [ 37.145621] inet6_release+0x51/0x80 [ 37.149327] __sock_release+0x236/0x330 [ 37.153292] sctp_ctrlsock_exit+0x67/0x90 [ 37.157430] ops_exit_list+0x9a/0x190 [ 37.161224] cleanup_net+0x4a3/0xd30 [ 37.165096] ? net_drop_ns+0x90/0x90 [ 37.168797] process_one_work+0x7ac/0x1890 [ 37.173013] ? pwq_dec_nr_in_flight+0x360/0x360 [ 37.177660] ? lock_acquire+0x197/0x510 [ 37.181613] ? rwlock_bug.part.0+0xe0/0xe0 [ 37.185828] ? worker_thread+0x1e0/0x1330 [ 37.189957] worker_thread+0x6c1/0x1330 [ 37.193941] ? process_one_work+0x1890/0x1890 [ 37.198415] ? process_one_work+0x1890/0x1890 [ 37.202887] kthread+0x35e/0x530 [ 37.206232] ? kthread_create_on_node+0xd0/0xd0 [ 37.210880] ret_from_fork+0x24/0x30 [ 37.214574] ================================================================================ [ 37.606376] can: request_module (can-proto-0) failed. [ 37.619818] can: request_module (can-proto-0) failed. [ 37.630980] can: request_module (can-proto-0) failed. [ 37.679622] audit: type=1400 audit(1600719053.296:9): avc: denied { create } for pid=6355 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1