[ 31.419893] audit: type=1800 audit(1568508851.708:33): pid=6781 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 [ 31.446863] audit: type=1800 audit(1568508851.728:34): pid=6781 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: [ 38.617927] random: sshd: uninitialized urandom read (32 bytes read) [ 39.077290] audit: type=1400 audit(1568508859.368:35): avc: denied { map } for pid=6953 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 [ 39.123094] random: sshd: uninitialized urandom read (32 bytes read) [ 39.719088] random: sshd: uninitialized urandom read (32 bytes read) [ 39.902193] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. [ 45.395826] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.511206] audit: type=1400 audit(1568508865.808:36): avc: denied { map } for pid=6965 comm="syz-executor246" path="/root/syz-executor246212436" 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 [ 45.514475] kasan: CONFIG_KASAN_INLINE enabled [ 45.542717] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.550135] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.556375] Modules linked in: [ 45.559555] CPU: 0 PID: 6965 Comm: syz-executor246 Not tainted 4.14.143 #0 [ 45.566550] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.575888] task: ffff88809487e180 task.stack: ffff888097ac8000 [ 45.581933] RIP: 0010:rb_erase+0x29/0x1c10 [ 45.586157] RSP: 0018:ffff888097acf9d0 EFLAGS: 00010282 [ 45.591499] RAX: dffffc0000000000 RBX: ffff88809a3753f0 RCX: 1ffff11012f59f12 [ 45.598925] RDX: 0000000000000001 RSI: ffffffff8924d940 RDI: 0000000000000008 [ 45.606186] RBP: ffff888097acfa18 R08: ffffffff88d17b2c R09: 0000000000001b6a [ 45.613609] R10: ffff888097acf7d0 R11: ffff88809487e180 R12: 0000000000000000 [ 45.621137] R13: ffff88809a35e430 R14: 0000000000000000 R15: ffffffff867a3540 [ 45.628426] FS: 0000000000e58880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 45.636717] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.642595] CR2: 0000000020000104 CR3: 0000000092f48000 CR4: 00000000001406f0 [ 45.649859] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.657111] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.664378] Call Trace: [ 45.666964] integrity_inode_free+0x126/0x320 [ 45.671457] security_inode_free+0x19/0x90 [ 45.675669] __destroy_inode+0x1ef/0x4e0 [ 45.679731] destroy_inode+0x50/0x120 [ 45.683521] evict+0x3e6/0x630 [ 45.686704] iput+0x471/0x900 [ 45.689790] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 45.694798] ext4_ioctl+0x16b0/0x3920 [ 45.698578] ? avc_ss_reset+0x110/0x110 [ 45.702531] ? kasan_slab_free+0x75/0xc0 [ 45.706589] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 45.711773] ? find_held_lock+0x35/0x130 [ 45.715900] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 45.720920] ? __might_sleep+0x93/0xb0 [ 45.724874] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 45.730047] do_vfs_ioctl+0x7ae/0x1060 [ 45.733943] ? selinux_file_mprotect+0x5d0/0x5d0 [ 45.738678] ? ioctl_preallocate+0x1c0/0x1c0 [ 45.743079] ? putname+0xe0/0x120 [ 45.746539] ? do_sys_open+0x221/0x430 [ 45.750421] ? security_file_ioctl+0x7d/0xb0 [ 45.754827] ? security_file_ioctl+0x89/0xb0 [ 45.759232] SyS_ioctl+0x8f/0xc0 [ 45.762578] ? do_vfs_ioctl+0x1060/0x1060 [ 45.766721] do_syscall_64+0x1e8/0x640 [ 45.770587] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.775410] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 45.780578] RIP: 0033:0x440169 [ 45.783767] RSP: 002b:00007ffc45dff828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.791478] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 45.798726] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 [ 45.805987] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 45.813248] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 45.820496] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 45.827933] Code: 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 57 41 56 49 89 fe 48 83 c7 08 48 89 fa 41 55 48 c1 ea 03 41 54 53 48 83 ec 20 <80> 3c 02 00 0f 85 0c 11 00 00 49 8d 7e 10 4d 8b 7e 08 48 b8 00 [ 45.847028] RIP: rb_erase+0x29/0x1c10 RSP: ffff888097acf9d0 [ 45.852784] ---[ end trace 3fc4ae8ea007294d ]--- [ 45.857668] Kernel panic - not syncing: Fatal exception [ 45.864692] Kernel Offset: disabled [ 45.868450] Rebooting in 86400 seconds..