....] Starting O[ 32.573096] audit: type=1800 audit(1580018116.703:34): pid=7116 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 penBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.708946] random: sshd: uninitialized urandom read (32 bytes read) [ 36.217023] audit: type=1400 audit(1580018120.373:35): avc: denied { map } for pid=7290 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 [ 36.275473] random: sshd: uninitialized urandom read (32 bytes read) [ 36.981820] random: sshd: uninitialized urandom read (32 bytes read) [ 37.179960] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.34' (ECDSA) to the list of known hosts. [ 42.701234] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 42.833123] audit: type=1400 audit(1580018126.993:36): avc: denied { map } for pid=7302 comm="syz-executor490" path="/root/syz-executor490405931" 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 [ 42.836535] kasan: CONFIG_KASAN_INLINE enabled [ 42.864765] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.882630] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.888912] Modules linked in: [ 42.892115] CPU: 0 PID: 7302 Comm: syz-executor490 Not tainted 4.14.167-syzkaller #0 [ 42.900108] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.909571] task: ffff8880a4006680 task.stack: ffff88808dd10000 [ 42.915678] RIP: 0010:rb_erase+0x29/0x1c10 [ 42.920143] RSP: 0018:ffff88808dd179d0 EFLAGS: 00010282 [ 42.925508] RAX: dffffc0000000000 RBX: ffff888099a11570 RCX: 1ffff11011ba2f12 [ 42.933635] RDX: 0000000000000001 RSI: ffffffff89b66f60 RDI: 0000000000000008 [ 42.941339] RBP: ffff88808dd17a18 R08: ffffffff89602d4c R09: 0000000000001bc2 [ 42.948642] R10: ffff88808dd177d0 R11: ffff8880a4006680 R12: 0000000000000000 [ 42.956027] R13: ffff888095b3f3b0 R14: 0000000000000000 R15: ffffffff86d96720 [ 42.963575] FS: 0000000000d6d880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 42.971791] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.977677] CR2: 0000000020000040 CR3: 000000008cddb000 CR4: 00000000001406f0 [ 42.984943] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.992645] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.000048] Call Trace: [ 43.002644] integrity_inode_free+0x126/0x320 [ 43.007127] security_inode_free+0x19/0x90 [ 43.011358] __destroy_inode+0x1ef/0x4e0 [ 43.015521] destroy_inode+0x50/0x120 [ 43.019353] evict+0x3e6/0x630 [ 43.022533] ? do_raw_spin_unlock+0x174/0x260 [ 43.027341] iput+0x471/0x900 [ 43.030457] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 43.036889] ext4_ioctl+0x16a7/0x3920 [ 43.040682] ? avc_ss_reset+0x110/0x110 [ 43.044701] ? kmem_cache_free+0x83/0x2b0 [ 43.048834] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 43.054065] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 43.059113] ? __might_sleep+0x93/0xb0 [ 43.063099] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 43.068463] do_vfs_ioctl+0x7ae/0x1060 [ 43.072577] ? selinux_file_mprotect+0x5d0/0x5d0 [ 43.077329] ? kmem_cache_free+0x244/0x2b0 [ 43.081623] ? ioctl_preallocate+0x1c0/0x1c0 [ 43.086193] ? putname+0xe0/0x120 [ 43.089630] ? do_sys_open+0x221/0x430 [ 43.093515] ? security_file_ioctl+0x7d/0xb0 [ 43.100442] ? security_file_ioctl+0x89/0xb0 [ 43.104833] SyS_ioctl+0x8f/0xc0 [ 43.108228] ? do_vfs_ioctl+0x1060/0x1060 [ 43.112366] do_syscall_64+0x1e8/0x640 [ 43.116295] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.121139] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.126380] RIP: 0033:0x440159 [ 43.129550] RSP: 002b:00007ffd378850b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 43.137252] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 43.144516] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 43.151817] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 43.159264] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019e0 [ 43.166670] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 43.174045] 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 [ 43.193317] RIP: rb_erase+0x29/0x1c10 RSP: ffff88808dd179d0 [ 43.199118] ---[ end trace 70abb45cea78e3c2 ]--- [ 43.203904] Kernel panic - not syncing: Fatal exception [ 43.210765] Kernel Offset: disabled [ 43.214390] Rebooting in 86400 seconds..