[ 32.833417] audit: type=1800 audit(1579998707.092:33): pid=7077 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 32.860487] audit: type=1800 audit(1579998707.092:34): pid=7077 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.709326] random: sshd: uninitialized urandom read (32 bytes read) [ 36.940349] audit: type=1400 audit(1579998711.192:35): avc: denied { map } for pid=7252 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 36.998907] random: sshd: uninitialized urandom read (32 bytes read) [ 37.677837] random: sshd: uninitialized urandom read (32 bytes read) [ 37.858881] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.120' (ECDSA) to the list of known hosts. [ 43.581040] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 43.703836] audit: type=1400 audit(1579998717.962:36): avc: denied { map } for pid=7264 comm="syz-executor736" path="/root/syz-executor736174281" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 43.932558] kasan: CONFIG_KASAN_INLINE enabled [ 43.932573] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.932583] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.932586] Modules linked in: [ 43.932596] CPU: 0 PID: 2391 Comm: kworker/u4:4 Not tainted 4.14.167-syzkaller #0 [ 43.932599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.932612] Workqueue: events_unbound flush_to_ldisc [ 43.932618] task: ffff8880a168e340 task.stack: ffff8880a16a0000 [ 43.932626] RIP: 0010:do_con_write.part.0+0x7d6/0x1b50 [ 43.932629] RSP: 0018:ffff8880a16a7858 EFLAGS: 00010203 [ 43.932634] RAX: 0000000020000001 RBX: 000000010000000e RCX: 0000000000000002 [ 43.932637] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88808761073d [ 43.932641] RBP: ffff8880a16a79a8 R08: ffff8880a168e340 R09: 0000000000000000 [ 43.932644] R10: 0000000000000000 R11: ffff8880a168e340 R12: dffffc0000000000 [ 43.932647] R13: 000000000000075e R14: ffff88808761074c R15: ffff8880876103c0 [ 43.932651] FS: 0000000000000000(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 43.932654] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.932657] CR2: 00007f294e350000 CR3: 0000000091d8f000 CR4: 00000000001406f0 [ 43.932667] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.932669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.932671] Call Trace: [ 43.932687] ? lock_acquire+0x1ae/0x430 [ 43.932693] ? do_con_trol+0x5b40/0x5b40 [ 43.932700] ? n_tty_receive_buf_common+0x8ad/0x2570 [ 43.932707] ? do_con_write.part.0+0x1b50/0x1b50 [ 43.932713] con_put_char+0xb8/0xc0 [ 43.932719] ? do_con_write.part.0+0x1b50/0x1b50 [ 43.932728] tty_put_char+0xac/0x130 [ 43.932735] ? dev_match_devt+0x90/0x90 [ 43.932743] ? con_write_room+0x4c/0x60 [ 43.932749] ? vt_console_device+0xb0/0xb0 [ 43.932756] __process_echoes+0x495/0x8a0 [ 43.932764] n_tty_receive_buf_common+0x8ed/0x2570 [ 43.932776] n_tty_receive_buf2+0x34/0x40 [ 43.932783] ? n_tty_receive_buf_common+0x2570/0x2570 [ 43.932790] tty_ldisc_receive_buf+0xa5/0x1a0 [ 43.932797] tty_port_default_receive_buf+0x73/0xa0 [ 43.932803] flush_to_ldisc+0x1ec/0x400 [ 43.932814] process_one_work+0x863/0x1600 [ 43.932831] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 43.932841] worker_thread+0x5d9/0x1050 [ 43.932852] kthread+0x319/0x430 [ 43.932859] ? process_one_work+0x1600/0x1600 [ 43.932865] ? kthread_create_on_node+0xd0/0xd0 [ 43.932873] ret_from_fork+0x24/0x30 [ 43.932880] Code: 66 44 03 ad 30 ff ff ff e8 38 3c 0b fe 48 8b 85 f0 fe ff ff 80 38 00 0f 85 97 11 00 00 49 8b 9f a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f [ 43.932983] RIP: do_con_write.part.0+0x7d6/0x1b50 RSP: ffff8880a16a7858 [ 43.933023] ---[ end trace 249c94aef35fcab9 ]--- [ 43.933027] Kernel panic - not syncing: Fatal exception [ 43.934777] Kernel Offset: disabled