restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.083847] random: sshd: uninitialized urandom read (32 bytes read) [ 32.346581] kauditd_printk_skb: 5 callbacks suppressed [ 32.346588] audit: type=1400 audit(1566413709.540:35): avc: denied { map } for pid=6675 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 [ 32.388567] random: sshd: uninitialized urandom read (32 bytes read) [ 32.845067] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.123' (ECDSA) to the list of known hosts. [ 38.559042] urandom_read: 1 callbacks suppressed [ 38.559045] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 38.676247] audit: type=1400 audit(1566413715.870:36): avc: denied { map } for pid=6688 comm="syz-executor071" path="/root/syz-executor071993305" 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 [ 38.679517] kasan: CONFIG_KASAN_INLINE enabled [ 38.707238] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.714702] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.720917] Modules linked in: [ 38.724080] CPU: 1 PID: 6688 Comm: syz-executor071 Not tainted 4.14.139 #35 [ 38.731288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.740616] task: ffff888070dee680 task.stack: ffff8880a9988000 [ 38.746801] RIP: 0010:rb_erase+0x29/0x1c10 [ 38.751067] RSP: 0018:ffff8880a998f9d0 EFLAGS: 00010282 [ 38.756528] RAX: dffffc0000000000 RBX: ffff8880942934b0 RCX: 1ffff11015331f12 [ 38.763945] RDX: 0000000000000001 RSI: ffffffff8924d880 RDI: 0000000000000008 [ 38.771190] RBP: ffff8880a998fa18 R08: ffffffff88d1841c R09: 0000000000001b2c [ 38.778434] R10: ffff8880a998f7d0 R11: ffff888070dee680 R12: 0000000000000000 [ 38.785678] R13: ffff8880943563f0 R14: 0000000000000000 R15: ffffffff867a3300 [ 38.792923] FS: 0000000000bd9880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 38.801115] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.807282] CR2: 0000563ad10f5190 CR3: 000000007b245000 CR4: 00000000001406e0 [ 38.814526] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.821766] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.829004] Call Trace: [ 38.831572] integrity_inode_free+0x126/0x320 [ 38.836047] security_inode_free+0x19/0x90 [ 38.840254] __destroy_inode+0x1ef/0x4e0 [ 38.844282] destroy_inode+0x50/0x120 [ 38.848050] evict+0x3e6/0x630 [ 38.851210] iput+0x471/0x900 [ 38.854289] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 38.859277] ext4_ioctl+0x16b0/0x3920 [ 38.863172] ? avc_ss_reset+0x110/0x110 [ 38.867127] ? kasan_slab_free+0x75/0xc0 [ 38.871159] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 38.876317] ? find_held_lock+0x35/0x130 [ 38.880409] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 38.885403] ? __might_sleep+0x93/0xb0 [ 38.889522] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 38.894687] do_vfs_ioctl+0x7ae/0x1060 [ 38.898670] ? selinux_file_mprotect+0x5d0/0x5d0 [ 38.903395] ? ioctl_preallocate+0x1c0/0x1c0 [ 38.907772] ? putname+0xe0/0x120 [ 38.911193] ? do_sys_open+0x221/0x430 [ 38.915048] ? security_file_ioctl+0x7d/0xb0 [ 38.919425] ? security_file_ioctl+0x89/0xb0 [ 38.923820] SyS_ioctl+0x8f/0xc0 [ 38.927162] ? do_vfs_ioctl+0x1060/0x1060 [ 38.931443] do_syscall_64+0x1e8/0x640 [ 38.935405] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.940231] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.945395] RIP: 0033:0x440169 [ 38.948552] RSP: 002b:00007ffc2c616b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 38.956230] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 38.963597] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 [ 38.970908] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 38.978152] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 38.985542] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 38.992873] 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 [ 39.012174] RIP: rb_erase+0x29/0x1c10 RSP: ffff8880a998f9d0 [ 39.018208] ---[ end trace 85bdddca6cd25cfe ]--- [ 39.022966] Kernel panic - not syncing: Fatal exception [ 39.029496] Kernel Offset: disabled [ 39.033108] Rebooting in 86400 seconds..