[ 33.387220] audit: type=1800 audit(1584742516.479:33): pid=7166 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 [ 33.419164] audit: type=1800 audit(1584742516.479:34): pid=7166 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: [ 37.833668] random: sshd: uninitialized urandom read (32 bytes read) [ 38.012733] audit: type=1400 audit(1584742521.109:35): avc: denied { map } for pid=7339 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 [ 38.062753] random: sshd: uninitialized urandom read (32 bytes read) [ 38.769481] random: sshd: uninitialized urandom read (32 bytes read) [ 38.958283] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts. [ 44.543922] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 44.662717] audit: type=1400 audit(1584742527.759:36): avc: denied { map } for pid=7351 comm="syz-executor456" path="/root/syz-executor456887479" 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 [ 44.665781] kasan: CONFIG_KASAN_INLINE enabled [ 44.693893] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.701297] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.707514] Modules linked in: [ 44.710690] CPU: 0 PID: 7351 Comm: syz-executor456 Not tainted 4.14.174-syzkaller #0 [ 44.718545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.727911] task: ffff888099898040 task.stack: ffff8880a46e8000 [ 44.733951] RIP: 0010:rb_erase+0x29/0x19b0 [ 44.738302] RSP: 0018:ffff8880a46efa68 EFLAGS: 00010292 [ 44.743650] RAX: dffffc0000000000 RBX: ffff888095e273b0 RCX: 1ffff110148ddf26 [ 44.750898] RDX: 0000000000000001 RSI: ffffffff8a659de0 RDI: 0000000000000008 [ 44.758195] RBP: 0000000000000000 R08: ffffffff8a0f5c0c R09: 0000000000001bfc [ 44.765442] R10: ffff8880a46ef870 R11: ffff888099898040 R12: ffff888095e1d3f0 [ 44.772801] R13: 0000000000000000 R14: ffff888095e1d478 R15: ffffffff8a659de0 [ 44.780053] FS: 0000000002497880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 44.788252] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.794108] CR2: 00000000200001c4 CR3: 000000009660a000 CR4: 00000000001406f0 [ 44.801355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.808626] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.815888] Call Trace: [ 44.818474] integrity_inode_free+0x119/0x300 [ 44.822952] security_inode_free+0x14/0x80 [ 44.827256] __destroy_inode+0x1e8/0x4c0 [ 44.831295] destroy_inode+0x49/0x110 [ 44.835076] iput+0x457/0x8d0 [ 44.838195] ? ext4_nfs_commit_metadata+0x2d0/0x2d0 [ 44.843191] ext4_ioctl+0x145f/0x39f0 [ 44.846968] ? avc_ss_reset+0x100/0x100 [ 44.850921] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 44.856086] ? do_sys_open+0x1f9/0x3f0 [ 44.860027] ? do_syscall_64+0x1d5/0x640 [ 44.864099] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 44.869447] ? find_held_lock+0x2d/0x110 [ 44.873485] ? debug_check_no_obj_freed+0x28e/0x6e4 [ 44.878477] ? lock_acquire+0x170/0x3f0 [ 44.882426] ? lock_downgrade+0x6e0/0x6e0 [ 44.886596] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 44.891763] do_vfs_ioctl+0x75a/0xfe0 [ 44.895541] ? selinux_file_mprotect+0x5c0/0x5c0 [ 44.900273] ? ioctl_preallocate+0x1a0/0x1a0 [ 44.904667] ? rcu_read_lock_sched_held+0x10a/0x130 [ 44.909690] ? kmem_cache_free+0x23a/0x2b0 [ 44.913902] ? putname+0xcd/0x110 [ 44.917336] ? security_file_ioctl+0x76/0xb0 [ 44.921718] ? security_file_ioctl+0x83/0xb0 [ 44.926101] SyS_ioctl+0x7f/0xb0 [ 44.929477] ? do_vfs_ioctl+0xfe0/0xfe0 [ 44.933426] do_syscall_64+0x1d5/0x640 [ 44.937290] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 44.942454] RIP: 0033:0x440169 [ 44.945618] RSP: 002b:00007ffd4029bdf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 44.953301] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 44.960547] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 44.967795] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.975040] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 44.982286] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 44.989533] 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 [ 45.008622] RIP: rb_erase+0x29/0x19b0 RSP: ffff8880a46efa68 [ 45.014387] ---[ end trace a901569cc0f0e743 ]--- [ 45.019140] Kernel panic - not syncing: Fatal exception [ 45.025790] Kernel Offset: disabled [ 45.029409] Rebooting in 86400 seconds..