[ 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 '10.128.10.17' (ECDSA) to the list of known hosts. 2020/09/17 01:42:56 fuzzer started 2020/09/17 01:42:56 connecting to host at 10.128.0.105:39573 2020/09/17 01:42:56 checking machine... 2020/09/17 01:42:56 checking revisions... 2020/09/17 01:42:56 testing simple program... syzkaller login: [ 37.125185] audit: type=1400 audit(1600306976.905:8): avc: denied { execmem } for pid=6376 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 37.181276] IPVS: ftp: loaded support on port[0] = 21 2020/09/17 01:42:57 building call list... [ 37.757095] ================================================================================ [ 37.765816] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 37.772556] member access within null pointer of type 'struct crypto_shash' [ 37.779648] CPU: 1 PID: 29 Comm: kworker/u4:2 Not tainted 4.14.198-syzkaller #0 [ 37.787085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.796439] Workqueue: netns cleanup_net [ 37.800488] Call Trace: [ 37.803070] dump_stack+0x21b/0x32e [ 37.806690] ? dma_virt_alloc+0x82/0x82 [ 37.810683] ? ubsan_prologue+0x29/0x50 [ 37.814658] ubsan_epilogue+0xe/0x3a [ 37.818359] handle_null_ptr_deref+0x78/0x80 [ 37.822757] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 37.828028] sctp_destruct_sock+0x70/0x80 [ 37.832168] ? sctp_accept+0x730/0x730 [ 37.836047] __sk_destruct+0x93/0x8e0 [ 37.839841] ? proto_unregister+0x5e0/0x5e0 [ 37.844155] ? mark_held_locks+0xc4/0x120 [ 37.848294] __sk_free+0xf4/0x370 [ 37.851742] sk_free+0x30/0x50 [ 37.854923] sctp_close+0x667/0x940 [ 37.858546] ? sctp_init_sock+0x1430/0x1430 [ 37.862858] ? do_raw_spin_unlock+0x1e0/0x310 [ 37.867346] ? ip_mc_drop_socket+0x16/0x270 [ 37.871661] inet_release+0xfe/0x230 [ 37.875367] inet6_release+0x51/0x80 [ 37.879073] __sock_release+0x236/0x330 [ 37.883039] sctp_ctrlsock_exit+0x67/0x90 [ 37.887183] ops_exit_list+0x9a/0x190 [ 37.890976] cleanup_net+0x4a3/0xd30 [ 37.894684] ? net_drop_ns+0x90/0x90 [ 37.898412] process_one_work+0x7ac/0x1890 [ 37.902714] ? pwq_dec_nr_in_flight+0x360/0x360 [ 37.907376] ? lock_acquire+0x197/0x510 [ 37.911340] ? rwlock_bug.part.0+0xe0/0xe0 [ 37.915568] ? worker_thread+0x1e0/0x1330 [ 37.919722] worker_thread+0x6c1/0x1330 [ 37.923700] ? process_one_work+0x1890/0x1890 [ 37.928201] ? process_one_work+0x1890/0x1890 [ 37.932675] kthread+0x35e/0x530 [ 37.936033] ? kthread_create_on_node+0xd0/0xd0 [ 37.940682] ret_from_fork+0x24/0x30 [ 37.944385] ================================================================================ [ 38.222951] can: request_module (can-proto-0) failed. [ 38.236881] can: request_module (can-proto-0) failed. [ 38.249117] can: request_module (can-proto-0) failed. [ 38.297847] audit: type=1400 audit(1600306978.075:9): avc: denied { create } for pid=6359 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1