[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. 2020/09/23 10:52:28 fuzzer started 2020/09/23 10:52:28 connecting to host at 10.128.0.105:38757 2020/09/23 10:52:28 checking machine... 2020/09/23 10:52:28 checking revisions... 2020/09/23 10:52:28 testing simple program... syzkaller login: [ 38.754363] audit: type=1400 audit(1600858348.273:8): avc: denied { execmem } for pid=6377 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.809673] IPVS: ftp: loaded support on port[0] = 21 2020/09/23 10:52:28 building call list... [ 39.402174] ================================================================================ [ 39.410901] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 39.417736] member access within null pointer of type 'struct crypto_shash' [ 39.424919] CPU: 1 PID: 2336 Comm: kworker/u4:3 Not tainted 4.14.199-syzkaller #0 [ 39.432702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.442055] Workqueue: netns cleanup_net [ 39.446110] Call Trace: [ 39.448696] dump_stack+0x21b/0x32e [ 39.452325] ? dma_virt_alloc+0x82/0x82 [ 39.456296] ? ubsan_prologue+0x29/0x50 [ 39.460293] ubsan_epilogue+0xe/0x3a [ 39.464119] handle_null_ptr_deref+0x78/0x80 [ 39.468529] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 39.474336] sctp_destruct_sock+0x70/0x80 [ 39.478481] ? sctp_accept+0x730/0x730 [ 39.482365] __sk_destruct+0x93/0x8e0 [ 39.486163] ? proto_unregister+0x5e0/0x5e0 [ 39.490483] ? mark_held_locks+0xc4/0x120 [ 39.494732] __sk_free+0xf4/0x370 [ 39.498180] sk_free+0x30/0x50 [ 39.501552] sctp_close+0x667/0x940 [ 39.505355] ? sctp_init_sock+0x1430/0x1430 [ 39.509684] ? do_raw_spin_unlock+0x1e0/0x310 [ 39.514180] ? ip_mc_drop_socket+0x16/0x270 [ 39.518507] inet_release+0xfe/0x230 [ 39.524483] inet6_release+0x51/0x80 [ 39.528383] __sock_release+0x236/0x330 [ 39.532367] sctp_ctrlsock_exit+0x67/0x90 [ 39.536514] ops_exit_list+0x9a/0x190 [ 39.540578] cleanup_net+0x4a3/0xd30 [ 39.544291] ? net_drop_ns+0x90/0x90 [ 39.548032] process_one_work+0x7ac/0x1890 [ 39.552290] ? pwq_dec_nr_in_flight+0x360/0x360 [ 39.556958] ? lock_acquire+0x197/0x510 [ 39.560938] ? rwlock_bug.part.0+0xe0/0xe0 [ 39.565873] ? worker_thread+0x1e0/0x1330 [ 39.570118] worker_thread+0x6c1/0x1330 [ 39.574106] ? process_one_work+0x1890/0x1890 [ 39.578600] ? process_one_work+0x1890/0x1890 [ 39.583094] kthread+0x35e/0x530 [ 39.586469] ? kthread_create_on_node+0xd0/0xd0 [ 39.591483] ret_from_fork+0x24/0x30 [ 39.595200] ================================================================================ [ 39.882670] can: request_module (can-proto-0) failed. [ 39.896707] can: request_module (can-proto-0) failed. [ 39.908212] can: request_module (can-proto-0) failed. [ 39.958835] audit: type=1400 audit(1600858349.474:9): avc: denied { create } for pid=6360 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1