[ 36.567992] audit: type=1800 audit(1584865083.315:33): pid=7344 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 [ 36.595186] audit: type=1800 audit(1584865083.325:34): pid=7344 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: [ 41.214011] random: sshd: uninitialized urandom read (32 bytes read) [ 41.659385] audit: type=1400 audit(1584865088.405:35): avc: denied { map } for pid=7518 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 [ 41.709995] random: sshd: uninitialized urandom read (32 bytes read) [ 42.454658] random: sshd: uninitialized urandom read (32 bytes read) [ 42.641722] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.182' (ECDSA) to the list of known hosts. [ 49.872701] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 50.000953] audit: type=1400 audit(1584865096.755:36): avc: denied { map } for pid=7531 comm="syz-executor500" path="/root/syz-executor500700603" 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 [ 50.004687] kasan: CONFIG_KASAN_INLINE enabled [ 50.032455] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.039835] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.046044] Modules linked in: [ 50.049214] CPU: 0 PID: 7531 Comm: syz-executor500 Not tainted 4.14.174-syzkaller #0 [ 50.057087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.066420] task: ffff8880733f64c0 task.stack: ffff88808b698000 [ 50.072475] RIP: 0010:rb_erase+0x29/0x19b0 [ 50.076691] RSP: 0018:ffff88808b69fa68 EFLAGS: 00010292 [ 50.082028] RAX: dffffc0000000000 RBX: ffff888091a028b0 RCX: 1ffff110116d3f26 [ 50.089273] RDX: 0000000000000001 RSI: ffffffff8a659de0 RDI: 0000000000000008 [ 50.096518] RBP: 0000000000000000 R08: ffffffff8a0f5c0c R09: 0000000000001bea [ 50.103761] R10: ffff88808b69f870 R11: ffff8880733f64c0 R12: ffff888091a073b0 [ 50.111016] R13: 0000000000000000 R14: ffff888091a07438 R15: ffffffff8a659de0 [ 50.118264] FS: 00000000020f6880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 50.126465] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.132323] CR2: 000055bdf5b80190 CR3: 000000009212c000 CR4: 00000000001406f0 [ 50.139587] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.146846] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.154098] Call Trace: [ 50.156674] integrity_inode_free+0x119/0x300 [ 50.161190] security_inode_free+0x14/0x80 [ 50.165406] __destroy_inode+0x1e8/0x4c0 [ 50.169454] destroy_inode+0x49/0x110 [ 50.173231] iput+0x457/0x8d0 [ 50.176314] ? ext4_nfs_commit_metadata+0x2d0/0x2d0 [ 50.181310] ext4_ioctl+0x145f/0x39f0 [ 50.185103] ? avc_ss_reset+0x100/0x100 [ 50.189068] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 50.194237] ? do_sys_open+0x1f9/0x3f0 [ 50.198102] ? do_syscall_64+0x1d5/0x640 [ 50.202139] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 50.207480] ? find_held_lock+0x2d/0x110 [ 50.211516] ? debug_check_no_obj_freed+0x28e/0x6e4 [ 50.216508] ? lock_acquire+0x170/0x3f0 [ 50.220459] ? lock_downgrade+0x6e0/0x6e0 [ 50.224585] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 50.229750] do_vfs_ioctl+0x75a/0xfe0 [ 50.233528] ? selinux_file_mprotect+0x5c0/0x5c0 [ 50.238259] ? ioctl_preallocate+0x1a0/0x1a0 [ 50.242645] ? rcu_read_lock_sched_held+0x10a/0x130 [ 50.247634] ? kmem_cache_free+0x23a/0x2b0 [ 50.251843] ? putname+0xcd/0x110 [ 50.255272] ? security_file_ioctl+0x76/0xb0 [ 50.259654] ? security_file_ioctl+0x83/0xb0 [ 50.264037] SyS_ioctl+0x7f/0xb0 [ 50.267400] ? do_vfs_ioctl+0xfe0/0xfe0 [ 50.271353] do_syscall_64+0x1d5/0x640 [ 50.275215] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 50.280381] RIP: 0033:0x440149 [ 50.283545] RSP: 002b:00007ffc5d75c808 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 50.291227] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440149 [ 50.300393] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 50.307737] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 50.314993] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019d0 [ 50.322285] R13: 0000000000401a60 R14: 0000000000000000 R15: 0000000000000000 [ 50.329538] Code: 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 49 89 fd 48 83 c7 08 48 89 fa 41 54 48 c1 ea 03 55 53 48 83 ec 18 <80> 3c 02 00 0f 85 f5 10 00 00 49 8d 7d 10 4d 8b 75 08 48 b8 00 [ 50.348787] RIP: rb_erase+0x29/0x19b0 RSP: ffff88808b69fa68 [ 50.354546] ---[ end trace c469c2501ebd8213 ]--- [ 50.359290] Kernel panic - not syncing: Fatal exception [ 50.366033] Kernel Offset: disabled [ 50.369664] Rebooting in 86400 seconds..