[ 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 '10.128.0.182' (ECDSA) to the list of known hosts. 2020/09/23 19:04:12 fuzzer started 2020/09/23 19:04:12 connecting to host at 10.128.0.105:44307 2020/09/23 19:04:12 checking machine... 2020/09/23 19:04:12 checking revisions... 2020/09/23 19:04:12 testing simple program... syzkaller login: [ 38.146307] audit: type=1400 audit(1600887852.968:8): avc: denied { execmem } for pid=6393 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.201799] IPVS: ftp: loaded support on port[0] = 21 2020/09/23 19:04:13 building call list... [ 38.793676] ================================================================================ [ 38.802413] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 38.809154] member access within null pointer of type 'struct crypto_shash' [ 38.816243] CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.199-syzkaller #0 [ 38.823589] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.832940] Workqueue: netns cleanup_net [ 38.836988] Call Trace: [ 38.839569] dump_stack+0x21b/0x32e [ 38.843188] ? dma_virt_alloc+0x82/0x82 [ 38.847152] ? ubsan_prologue+0x29/0x50 [ 38.851124] ubsan_epilogue+0xe/0x3a [ 38.854838] handle_null_ptr_deref+0x78/0x80 [ 38.859236] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 38.864535] sctp_destruct_sock+0x70/0x80 [ 38.868693] ? sctp_accept+0x730/0x730 [ 38.872573] __sk_destruct+0x93/0x8e0 [ 38.876368] ? proto_unregister+0x5e0/0x5e0 [ 38.880684] ? mark_held_locks+0xc4/0x120 [ 38.884827] __sk_free+0xf4/0x370 [ 38.888275] sk_free+0x30/0x50 [ 38.891459] sctp_close+0x667/0x940 [ 38.895095] ? sctp_init_sock+0x1430/0x1430 [ 38.899406] ? do_raw_spin_unlock+0x1e0/0x310 [ 38.903899] ? ip_mc_drop_socket+0x16/0x270 [ 38.908237] inet_release+0xfe/0x230 [ 38.911948] inet6_release+0x51/0x80 [ 38.915654] __sock_release+0x236/0x330 [ 38.919642] sctp_ctrlsock_exit+0x67/0x90 [ 38.923774] ops_exit_list+0x9a/0x190 [ 38.927556] cleanup_net+0x4a3/0xd30 [ 38.932637] ? net_drop_ns+0x90/0x90 [ 38.936339] process_one_work+0x7ac/0x1890 [ 38.940576] ? pwq_dec_nr_in_flight+0x360/0x360 [ 38.945224] ? lock_acquire+0x197/0x510 [ 38.949179] ? rwlock_bug.part.0+0xe0/0xe0 [ 38.953393] ? worker_thread+0x1e0/0x1330 [ 38.957523] worker_thread+0x6c1/0x1330 [ 38.961485] ? process_one_work+0x1890/0x1890 [ 38.965963] ? process_one_work+0x1890/0x1890 [ 38.970435] kthread+0x35e/0x530 [ 38.973781] ? kthread_create_on_node+0xd0/0xd0 [ 38.978434] ret_from_fork+0x24/0x30 [ 38.982132] ================================================================================ [ 39.315823] can: request_module (can-proto-0) failed. [ 39.329481] can: request_module (can-proto-0) failed. [ 39.341034] can: request_module (can-proto-0) failed. [ 39.391788] audit: type=1400 audit(1600887854.219:9): avc: denied { create } for pid=6377 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1