ell server: sshd[?25l[?1c7[ ok [39;[ 35.483771] audit: type=1800 audit(1561402008.608:34): pid=7037 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 49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.519668] random: sshd: uninitialized urandom read (32 bytes read) [ 38.846616] audit: type=1400 audit(1561402011.958:35): avc: denied { map } for pid=7209 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 [ 38.898724] random: sshd: uninitialized urandom read (32 bytes read) [ 39.529139] random: sshd: uninitialized urandom read (32 bytes read) [ 39.725854] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts. [ 45.355854] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.473610] audit: type=1400 audit(1561402018.588:36): avc: denied { map } for pid=7221 comm="syz-executor303" path="/root/syz-executor303235086" 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 [ 45.476991] kasan: CONFIG_KASAN_INLINE enabled [ 45.504815] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.512231] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.518475] Modules linked in: [ 45.521653] CPU: 1 PID: 7221 Comm: syz-executor303 Not tainted 4.14.129 #23 [ 45.528732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.538066] task: ffff88807506a100 task.stack: ffff888073550000 [ 45.544111] RIP: 0010:rb_erase+0x29/0x1c10 [ 45.548323] RSP: 0018:ffff8880735579d0 EFLAGS: 00010282 [ 45.553663] RAX: dffffc0000000000 RBX: ffff888074e233b0 RCX: 1ffff1100e6aaf12 [ 45.560929] RDX: 0000000000000001 RSI: ffffffff89246940 RDI: 0000000000000008 [ 45.568176] RBP: ffff888073557a18 R08: ffffffff88d10c3c R09: 0000000000001b1e [ 45.575425] R10: ffff8880735577d0 R11: ffff88807506a100 R12: 0000000000000000 [ 45.582673] R13: ffff888074e1c430 R14: 0000000000000000 R15: ffffffff867a2f80 [ 45.589940] FS: 0000000000e09880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 45.598149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.604008] CR2: 0000000020000044 CR3: 000000007592c000 CR4: 00000000001406e0 [ 45.611256] Call Trace: [ 45.613827] integrity_inode_free+0x126/0x320 [ 45.618405] security_inode_free+0x19/0x90 [ 45.622621] __destroy_inode+0x1ef/0x4e0 [ 45.626660] destroy_inode+0x50/0x120 [ 45.630440] evict+0x3e6/0x630 [ 45.633608] iput+0x471/0x900 [ 45.636695] ? ext4_nfs_commit_metadata+0x2f0/0x2f0 [ 45.641697] ext4_ioctl+0x16bb/0x39b0 [ 45.645477] ? avc_ss_reset+0x110/0x110 [ 45.650280] ? kasan_slab_free+0x75/0xc0 [ 45.654331] ? ext4_ioctl_setflags+0x5d0/0x5d0 [ 45.658892] ? find_held_lock+0x35/0x130 [ 45.662937] ? debug_check_no_obj_freed+0x2aa/0x7b7 [ 45.667937] ? __might_sleep+0x93/0xb0 [ 45.671807] ? ext4_ioctl_setflags+0x5d0/0x5d0 [ 45.676368] do_vfs_ioctl+0x7ae/0x1060 [ 45.680246] ? selinux_file_mprotect+0x5d0/0x5d0 [ 45.684982] ? ioctl_preallocate+0x1c0/0x1c0 [ 45.689369] ? putname+0xe0/0x120 [ 45.692801] ? do_sys_open+0x221/0x430 [ 45.696671] ? security_file_ioctl+0x7d/0xb0 [ 45.701057] ? security_file_ioctl+0x89/0xb0 [ 45.705442] SyS_ioctl+0x8f/0xc0 [ 45.708790] ? do_vfs_ioctl+0x1060/0x1060 [ 45.712918] do_syscall_64+0x1e8/0x640 [ 45.716781] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.721604] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 45.726774] RIP: 0033:0x440169 [ 45.729940] RSP: 002b:00007ffc63e0e248 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.737630] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 [ 45.744883] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 [ 45.752134] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 45.759388] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019f0 [ 45.766640] R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 [ 45.773891] 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 [ 45.792994] RIP: rb_erase+0x29/0x1c10 RSP: ffff8880735579d0 [ 45.798730] ---[ end trace f586bb1395340f07 ]--- [ 45.803490] Kernel panic - not syncing: Fatal exception [ 45.809918] Kernel Offset: disabled [ 45.813536] Rebooting in 86400 seconds..