[ 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 '10.128.1.47' (ECDSA) to the list of known hosts. 2020/09/28 08:01:38 fuzzer started 2020/09/28 08:01:38 connecting to host at 10.128.0.105:41937 2020/09/28 08:01:38 checking machine... 2020/09/28 08:01:38 checking revisions... 2020/09/28 08:01:38 testing simple program... syzkaller login: [ 37.568100] audit: type=1400 audit(1601280098.382:8): avc: denied { execmem } for pid=6387 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 37.627211] IPVS: ftp: loaded support on port[0] = 21 2020/09/28 08:01:38 building call list... [ 38.242038] ================================================================================ [ 38.250787] UBSAN: Undefined behaviour in ./include/crypto/hash.h:686:9 [ 38.257534] member access within null pointer of type 'struct crypto_shash' [ 38.264628] CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.199-syzkaller #0 [ 38.272068] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.281426] Workqueue: netns cleanup_net [ 38.285489] Call Trace: [ 38.288072] dump_stack+0x21b/0x32e [ 38.291696] ? dma_virt_alloc+0x82/0x82 [ 38.295664] ? ubsan_prologue+0x29/0x50 [ 38.299640] ubsan_epilogue+0xe/0x3a [ 38.303346] handle_null_ptr_deref+0x78/0x80 [ 38.307763] __ubsan_handle_type_mismatch_v1+0x81/0xb0 [ 38.313038] sctp_destruct_sock+0x70/0x80 [ 38.317179] ? sctp_accept+0x730/0x730 [ 38.321060] __sk_destruct+0x93/0x8e0 [ 38.324854] ? proto_unregister+0x5e0/0x5e0 [ 38.329170] ? mark_held_locks+0xc4/0x120 [ 38.333313] __sk_free+0xf4/0x370 [ 38.336759] sk_free+0x30/0x50 [ 38.339962] sctp_close+0x667/0x940 [ 38.343586] ? sctp_init_sock+0x1430/0x1430 [ 38.347898] ? do_raw_spin_unlock+0x1e0/0x310 [ 38.352392] ? ip_mc_drop_socket+0x16/0x270 [ 38.356708] inet_release+0xfe/0x230 [ 38.360419] inet6_release+0x51/0x80 [ 38.364133] __sock_release+0x236/0x330 [ 38.368102] sctp_ctrlsock_exit+0x67/0x90 [ 38.372242] ops_exit_list+0x9a/0x190 [ 38.376039] cleanup_net+0x4a3/0xd30 [ 38.379755] ? net_drop_ns+0x90/0x90 [ 38.383494] process_one_work+0x7ac/0x1890 [ 38.387738] ? pwq_dec_nr_in_flight+0x360/0x360 [ 38.392412] ? lock_acquire+0x197/0x510 [ 38.396395] ? rwlock_bug.part.0+0xe0/0xe0 [ 38.400635] ? worker_thread+0x1e0/0x1330 [ 38.404783] worker_thread+0x6c1/0x1330 [ 38.408757] ? process_one_work+0x1890/0x1890 [ 38.413242] ? process_one_work+0x1890/0x1890 [ 38.417730] kthread+0x35e/0x530 [ 38.421085] ? kthread_create_on_node+0xd0/0xd0 [ 38.425750] ret_from_fork+0x24/0x30 [ 38.429903] ================================================================================ [ 38.749648] can: request_module (can-proto-0) failed. [ 38.762154] can: request_module (can-proto-0) failed. [ 38.774759] can: request_module (can-proto-0) failed. [ 38.826286] audit: type=1400 audit(1601280099.643:9): avc: denied { create } for pid=6371 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1