[ 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 '10.128.1.19' (ECDSA) to the list of known hosts. 2020/09/18 19:36:57 fuzzer started 2020/09/18 19:36:57 connecting to host at 10.128.0.105:35383 2020/09/18 19:36:57 checking machine... 2020/09/18 19:36:57 checking revisions... 2020/09/18 19:36:57 testing simple program... syzkaller login: [ 36.240324] audit: type=1400 audit(1600457817.696:8): 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 [ 36.292935] IPVS: ftp: loaded support on port[0] = 21 2020/09/18 19:36:57 building call list... [ 36.895751] ================================================================================ [ 36.904476] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 36.911214] member access within null pointer of type 'struct crypto_shash' [ 36.918308] CPU: 0 PID: 6110 Comm: kworker/u4:5 Not tainted 4.14.198-syzkaller #0 [ 36.925935] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.935287] Workqueue: netns cleanup_net [ 36.939336] Call Trace: [ 36.941924] dump_stack+0x21b/0x32e [ 36.945547] ? dma_virt_alloc+0x82/0x82 [ 36.949512] ? ubsan_prologue+0x29/0x50 [ 36.953483] ubsan_epilogue+0xe/0x3a [ 36.957186] handle_null_ptr_deref+0x78/0x80 [ 36.961585] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 36.966857] sctp_destruct_sock+0x70/0x80 [ 36.971012] ? sctp_accept+0x730/0x730 [ 36.974890] __sk_destruct+0x93/0x8e0 [ 36.978683] ? proto_unregister+0x5e0/0x5e0 [ 36.982996] ? mark_held_locks+0xc4/0x120 [ 36.987153] __sk_free+0xf4/0x370 [ 36.990597] sk_free+0x30/0x50 [ 36.993779] sctp_close+0x667/0x940 [ 36.997417] ? sctp_init_sock+0x1430/0x1430 [ 37.001739] ? do_raw_spin_unlock+0x1e0/0x310 [ 37.006233] ? ip_mc_drop_socket+0x16/0x270 [ 37.010565] inet_release+0xfe/0x230 [ 37.014279] inet6_release+0x51/0x80 [ 37.017989] __sock_release+0x236/0x330 [ 37.021960] sctp_ctrlsock_exit+0x67/0x90 [ 37.026102] ops_exit_list+0x9a/0x190 [ 37.029906] cleanup_net+0x4a3/0xd30 [ 37.033634] ? net_drop_ns+0x90/0x90 [ 37.037354] process_one_work+0x7ac/0x1890 [ 37.041589] ? pwq_dec_nr_in_flight+0x360/0x360 [ 37.046251] ? lock_acquire+0x197/0x510 [ 37.050216] ? rwlock_bug.part.0+0xe0/0xe0 [ 37.054443] ? worker_thread+0x1e0/0x1330 [ 37.058590] worker_thread+0x6c1/0x1330 [ 37.062569] ? process_one_work+0x1890/0x1890 [ 37.067083] ? process_one_work+0x1890/0x1890 [ 37.071589] kthread+0x35e/0x530 [ 37.074960] ? kthread_create_on_node+0xd0/0xd0 [ 37.079628] ret_from_fork+0x24/0x30 [ 37.083336] ================================================================================ [ 37.259188] can: request_module (can-proto-0) failed. [ 37.278885] can: request_module (can-proto-0) failed. [ 37.298867] can: request_module (can-proto-0) failed. [ 37.346048] audit: type=1400 audit(1600457818.808:9): avc: denied { create } for pid=6361 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1