Warning: Permanently added '10.128.0.215' (ECDSA) to the list of known hosts. syzkaller login: [ 32.896595] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.003215] kauditd_printk_skb: 8 callbacks suppressed [ 33.003223] audit: type=1400 audit(1566406102.931:36): avc: denied { map } for pid=6654 comm="syz-executor414" path="/root/syz-executor414614201" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 33.006029] kasan: CONFIG_KASAN_INLINE enabled [ 33.039543] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.047003] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.053216] Modules linked in: [ 33.056379] CPU: 1 PID: 6654 Comm: syz-executor414 Not tainted 4.14.139 #35 [ 33.063445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.072765] task: ffff8880a18e82c0 task.stack: ffff888082dc8000 [ 33.078814] RIP: 0010:rb_erase+0x29/0x1c10 [ 33.083012] RSP: 0018:ffff888082dcf9d0 EFLAGS: 00010282 [ 33.088343] RAX: dffffc0000000000 RBX: ffff88807d504330 RCX: 1ffff110105b9f12 [ 33.095581] RDX: 0000000000000001 RSI: ffffffff8924d880 RDI: 0000000000000008 [ 33.102821] RBP: ffff888082dcfa18 R08: ffffffff88d17aec R09: 0000000000001b26 [ 33.110060] R10: ffff888082dcf7d0 R11: ffff8880a18e82c0 R12: 0000000000000000 [ 33.117312] R13: ffff88807d4cc3b0 R14: 0000000000000000 R15: ffffffff867a3300 [ 33.124551] FS: 0000000001ff0880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 33.132744] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.138605] CR2: 0000000020000704 CR3: 0000000097a05000 CR4: 00000000001406e0 [ 33.145844] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.153092] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.160730] Call Trace: [ 33.163290] integrity_inode_free+0x126/0x320 [ 33.167771] security_inode_free+0x19/0x90 [ 33.171990] __destroy_inode+0x1ef/0x4e0 [ 33.176019] destroy_inode+0x50/0x120 [ 33.179788] evict+0x3e6/0x630 [ 33.182950] iput+0x471/0x900 [ 33.186028] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 33.191018] ext4_ioctl+0x16b0/0x3920 [ 33.194788] ? avc_ss_reset+0x110/0x110 [ 33.198828] ? kasan_slab_free+0x75/0xc0 [ 33.202885] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 33.208133] ? find_held_lock+0x35/0x130 [ 33.212163] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 33.217148] ? __might_sleep+0x93/0xb0 [ 33.221006] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 33.226165] do_vfs_ioctl+0x7ae/0x1060 [ 33.230041] ? selinux_file_mprotect+0x5d0/0x5d0 [ 33.234777] ? ioctl_preallocate+0x1c0/0x1c0 [ 33.239149] ? putname+0xe0/0x120 [ 33.242572] ? do_sys_open+0x221/0x430 [ 33.246427] ? security_file_ioctl+0x7d/0xb0 [ 33.250801] ? security_file_ioctl+0x89/0xb0 [ 33.255176] SyS_ioctl+0x8f/0xc0 [ 33.258515] ? do_vfs_ioctl+0x1060/0x1060 [ 33.262633] do_syscall_64+0x1e8/0x640 [ 33.266489] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.271481] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 33.276637] RIP: 0033:0x440169 [ 33.279794] RSP: 002b:00007ffcd928bff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.287555] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 33.294898] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 33.302137] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 33.309376] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 33.316615] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 33.323856] 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 [ 33.343196] RIP: rb_erase+0x29/0x1c10 RSP: ffff888082dcf9d0 [ 33.348923] ---[ end trace 3e3b5ed6bb278432 ]--- [ 33.353662] Kernel panic - not syncing: Fatal exception [ 33.360192] Kernel Offset: disabled [ 33.363801] Rebooting in 86400 seconds..