Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.476642] audit: type=1400 audit(1594905362.617:8): avc: denied { execmem } for pid=6457 comm="syz-executor187" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.479799] ------------[ cut here ]------------ [ 40.502126] WARNING: CPU: 0 PID: 6457 at sound/core/info.c:637 snd_info_get_line.cold+0x11/0x20 [ 40.510962] Kernel panic - not syncing: panic_on_warn set ... [ 40.510962] [ 40.518309] CPU: 0 PID: 6457 Comm: syz-executor187 Not tainted 4.19.133-syzkaller #0 [ 40.526217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.535547] Call Trace: [ 40.538117] dump_stack+0x1fc/0x2fe [ 40.541730] panic+0x26a/0x50e [ 40.544903] ? __warn_printk+0xf3/0xf3 [ 40.548774] ? snd_info_get_line.cold+0x11/0x20 [ 40.553422] ? __probe_kernel_read+0x16c/0x1b0 [ 40.557980] ? __warn.cold+0x5/0x61 [ 40.561643] ? __warn+0xe4/0x200 [ 40.564992] ? snd_info_get_line.cold+0x11/0x20 [ 40.569637] __warn.cold+0x20/0x61 [ 40.573158] ? io_schedule_timeout+0x140/0x140 [ 40.577717] ? snd_info_get_line.cold+0x11/0x20 [ 40.582365] report_bug+0x262/0x2b0 [ 40.585971] do_error_trap+0x1d7/0x310 [ 40.589835] ? math_error+0x310/0x310 [ 40.593615] ? __irq_work_queue_local+0x101/0x160 [ 40.598484] ? irq_work_queue+0x29/0x80 [ 40.602440] ? wake_up_klogd+0x8c/0xc0 [ 40.606312] ? trace_hardirqs_off_caller+0x69/0x210 [ 40.611307] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.616129] invalid_op+0x14/0x20 [ 40.619562] RIP: 0010:snd_info_get_line.cold+0x11/0x20 [ 40.624817] Code: 31 c0 5b 5d c3 48 89 ef e8 9e df 15 fc eb be 48 89 ef e8 64 e2 15 fc eb d7 e8 9d c2 df fb 48 c7 c7 60 0e 22 88 e8 40 d5 ca fb <0f> 0b c7 44 24 0c 01 00 00 00 e9 9f cf ff ff e8 7d c2 df fb 48 c7 [ 40.643696] RSP: 0018:ffff8880a4c17978 EFLAGS: 00010282 [ 40.649035] RAX: 0000000000000024 RBX: ffff8880a910e200 RCX: 0000000000000000 [ 40.656396] RDX: 0000000000000000 RSI: ffffffff8154cd91 RDI: ffffed1014982f21 [ 40.663819] RBP: 0000000000000080 R08: 0000000000000024 R09: 0000000000000000 [ 40.671067] R10: 0000000000000005 R11: 0000000000000000 R12: ffff888094784540 [ 40.678313] R13: dffffc0000000000 R14: ffff8880a8641108 R15: ffff8880a910e200 [ 40.685571] ? vprintk_func+0x81/0x17e [ 40.689443] ? snd_info_get_line.cold+0x11/0x20 [ 40.694154] snd_mixer_oss_proc_write+0xe2/0x530 [ 40.698909] ? snd_mixer_oss_notify_handler+0x940/0x940 [ 40.704249] ? kernel_text_address+0xbd/0xf0 [ 40.708636] ? mark_held_locks+0xf0/0xf0 [ 40.712788] ? unwind_get_return_address+0x51/0x90 [ 40.717694] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.723036] ? __save_stack_trace+0xaf/0x190 [ 40.727429] ? close_pdeo.part.0+0x4c/0x2f0 [ 40.731746] ? lock_downgrade+0x720/0x720 [ 40.735875] snd_info_text_entry_release+0xfa/0x260 [ 40.740868] ? snd_mixer_oss_notify_handler+0x940/0x940 [ 40.746209] ? snd_info_register_recursive+0x120/0x120 [ 40.751476] close_pdeo.part.0+0xda/0x2f0 [ 40.755602] proc_reg_release+0x21e/0x270 [ 40.759729] ? close_pdeo+0x170/0x170 [ 40.763514] ? locks_remove_file+0x2cd/0x450 [ 40.767900] ? fsnotify_first_mark+0x200/0x200 [ 40.772461] ? fcntl_setlk+0xee0/0xee0 [ 40.776330] ? integrity_iint_find+0x123/0x150 [ 40.780890] ? ima_file_free+0xdd/0x460 [ 40.784842] ? close_pdeo+0x170/0x170 [ 40.788619] __fput+0x2ce/0x890 [ 40.791878] task_work_run+0x148/0x1c0 [ 40.795747] do_exit+0xbb2/0x2b70 [ 40.799179] ? check_preemption_disabled+0x41/0x280 [ 40.804188] ? mm_update_next_owner+0x650/0x650 [ 40.808833] ? vfs_write+0x393/0x540 [ 40.812526] ? ksys_write+0x1c8/0x2a0 [ 40.816303] do_group_exit+0x125/0x310 [ 40.820169] __x64_sys_exit_group+0x3a/0x50 [ 40.824474] do_syscall_64+0xf9/0x620 [ 40.828253] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.833425] RIP: 0033:0x43eeb8 [ 40.836601] Code: Bad RIP value. [ 40.839939] RSP: 002b:00007ffed49c2ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 40.847621] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eeb8 [ 40.854869] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 40.862116] RBP: 00000000004be6c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 40.869367] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 40.876634] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 40.885311] Kernel Offset: disabled [ 40.889066] Rebooting in 86400 seconds..