[ 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 '10.128.15.202' (ECDSA) to the list of known hosts. 2020/09/21 08:07:28 fuzzer started 2020/09/21 08:07:28 connecting to host at 10.128.0.105:46599 2020/09/21 08:07:28 checking machine... 2020/09/21 08:07:28 checking revisions... 2020/09/21 08:07:28 testing simple program... syzkaller login: [ 34.765020] audit: type=1400 audit(1600675648.473:8): avc: denied { execmem } for pid=6389 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 34.814621] IPVS: ftp: loaded support on port[0] = 21 2020/09/21 08:07:28 building call list... [ 35.373289] ================================================================================ [ 35.381994] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 35.388760] member access within null pointer of type 'struct crypto_shash' [ 35.395863] CPU: 1 PID: 149 Comm: kworker/u4:3 Not tainted 4.14.198-syzkaller #0 [ 35.403385] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.412734] Workqueue: netns cleanup_net [ 35.416779] Call Trace: [ 35.419359] dump_stack+0x21b/0x32e [ 35.422978] ? dma_virt_alloc+0x82/0x82 [ 35.426940] ? ubsan_prologue+0x29/0x50 [ 35.430911] ubsan_epilogue+0xe/0x3a [ 35.434618] handle_null_ptr_deref+0x78/0x80 [ 35.439035] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 35.444305] sctp_destruct_sock+0x70/0x80 [ 35.448440] ? sctp_accept+0x730/0x730 [ 35.452381] __sk_destruct+0x93/0x8e0 [ 35.456174] ? proto_unregister+0x5e0/0x5e0 [ 35.460505] ? mark_held_locks+0xc4/0x120 [ 35.464639] __sk_free+0xf4/0x370 [ 35.468083] sk_free+0x30/0x50 [ 35.471264] sctp_close+0x667/0x940 [ 35.474889] ? sctp_init_sock+0x1430/0x1430 [ 35.479198] ? do_raw_spin_unlock+0x1e0/0x310 [ 35.483695] ? ip_mc_drop_socket+0x16/0x270 [ 35.488009] inet_release+0xfe/0x230 [ 35.491718] inet6_release+0x51/0x80 [ 35.495422] __sock_release+0x236/0x330 [ 35.499390] sctp_ctrlsock_exit+0x67/0x90 [ 35.503529] ops_exit_list+0x9a/0x190 [ 35.507321] cleanup_net+0x4a3/0xd30 [ 35.511030] ? net_drop_ns+0x90/0x90 [ 35.514741] process_one_work+0x7ac/0x1890 [ 35.518972] ? pwq_dec_nr_in_flight+0x360/0x360 [ 35.523619] ? lock_acquire+0x197/0x510 [ 35.527571] ? rwlock_bug.part.0+0xe0/0xe0 [ 35.531799] ? worker_thread+0x1e0/0x1330 [ 35.535928] worker_thread+0x6c1/0x1330 [ 35.539900] ? process_one_work+0x1890/0x1890 [ 35.544374] ? process_one_work+0x1890/0x1890 [ 35.548847] kthread+0x35e/0x530 [ 35.552193] ? kthread_create_on_node+0xd0/0xd0 [ 35.556842] ret_from_fork+0x24/0x30 [ 35.560548] ================================================================================ [ 35.880634] can: request_module (can-proto-0) failed. [ 35.892244] can: request_module (can-proto-0) failed. [ 35.903642] can: request_module (can-proto-0) failed. [ 35.947752] audit: type=1400 audit(1600675649.653:9): avc: denied { create } for pid=6374 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1