[ 31.232212] audit: type=1800 audit(1561883177.399:34): pid=6709 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 ....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 32.158627] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.496973] audit: type=1400 audit(1561883178.659:35): avc: denied { map } for pid=6881 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 [ 32.546509] random: sshd: uninitialized urandom read (32 bytes read) [ 33.119862] random: sshd: uninitialized urandom read (32 bytes read) [ 33.309210] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts. [ 38.869790] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 38.998341] audit: type=1400 audit(1561883185.159:36): avc: denied { map } for pid=6894 comm="syz-executor968" path="/root/syz-executor968124765" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 39.001587] kasan: CONFIG_KASAN_INLINE enabled [ 39.029561] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.037040] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.043396] Modules linked in: [ 39.047078] CPU: 0 PID: 6894 Comm: syz-executor968 Not tainted 4.14.131 #25 [ 39.054277] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.063674] task: ffff88809beae000 task.stack: ffff8880850f0000 [ 39.069764] RIP: 0010:rb_erase+0x29/0x1c10 [ 39.073977] RSP: 0018:ffff8880850f79d0 EFLAGS: 00010282 [ 39.079403] RAX: dffffc0000000000 RBX: ffff888095cd9330 RCX: 1ffff11010a1ef12 [ 39.086744] RDX: 0000000000000001 RSI: ffffffff89246940 RDI: 0000000000000008 [ 39.093994] RBP: ffff8880850f7a18 R08: ffffffff88d1099c R09: 0000000000001af0 [ 39.101337] R10: ffff8880850f77d0 R11: ffff88809beae000 R12: 0000000000000000 [ 39.108675] R13: ffff888095cd3370 R14: 0000000000000000 R15: ffffffff867a2f80 [ 39.115944] FS: 0000000001ee9880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 39.124248] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.130128] CR2: 000055640b4481a0 CR3: 000000008e1f5000 CR4: 00000000001406f0 [ 39.137393] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.144756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.152019] Call Trace: [ 39.154644] integrity_inode_free+0x126/0x320 [ 39.159126] security_inode_free+0x19/0x90 [ 39.163441] __destroy_inode+0x1ef/0x4e0 [ 39.167501] destroy_inode+0x50/0x120 [ 39.171302] evict+0x3e6/0x630 [ 39.174480] iput+0x471/0x900 [ 39.177564] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 39.182559] ext4_ioctl+0x16bb/0x39b0 [ 39.186346] ? avc_ss_reset+0x110/0x110 [ 39.190313] ? kasan_slab_free+0x75/0xc0 [ 39.195803] ? ext4_ioctl_setflags+0x5d0/0x5d0 [ 39.200366] ? find_held_lock+0x35/0x130 [ 39.204411] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 39.209479] ? __might_sleep+0x93/0xb0 [ 39.213351] ? ext4_ioctl_setflags+0x5d0/0x5d0 [ 39.217914] do_vfs_ioctl+0x7ae/0x1060 [ 39.221786] ? selinux_file_mprotect+0x5d0/0x5d0 [ 39.226522] ? ioctl_preallocate+0x1c0/0x1c0 [ 39.230908] ? putname+0xe0/0x120 [ 39.234455] ? do_sys_open+0x221/0x430 [ 39.238322] ? security_file_ioctl+0x7d/0xb0 [ 39.242726] ? security_file_ioctl+0x89/0xb0 [ 39.247115] SyS_ioctl+0x8f/0xc0 [ 39.250458] ? do_vfs_ioctl+0x1060/0x1060 [ 39.254582] do_syscall_64+0x1e8/0x640 [ 39.258448] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.263270] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 39.268435] RIP: 0033:0x440169 [ 39.271603] RSP: 002b:00007ffdc84415f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 39.279289] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 39.286554] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 [ 39.293809] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 39.301248] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 39.308504] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 39.315756] 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 [ 39.334849] RIP: rb_erase+0x29/0x1c10 RSP: ffff8880850f79d0 [ 39.340806] ---[ end trace cf6a0b70fdf1ea05 ]--- [ 39.345622] Kernel panic - not syncing: Fatal exception [ 39.352814] Kernel Offset: disabled [ 39.356435] Rebooting in 86400 seconds..