[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.182413] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.659407] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 26.131543] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 26.986629] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 27.161319] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. [ 32.880182] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) executing program [ 32.995696] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.021305] IPVS: Creating netns size=2552 id=2 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.081699] IPVS: Creating netns size=2552 id=3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.128718] IPVS: Creating netns size=2552 id=4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.184921] IPVS: Creating netns size=2552 id=5 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.276550] IPVS: Creating netns size=2552 id=6 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.351679] IPVS: Creating netns size=2552 id=7 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.410224] kasan: CONFIG_KASAN_INLINE enabled [ 33.415005] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.430087] Dumping ftrace buffer: [ 33.433607] (ftrace buffer empty) [ 33.437302] Modules linked in: [ 33.440606] CPU: 0 PID: 3822 Comm: syzkaller336921 Not tainted 4.4.120-gd63fdf6 #28 [ 33.448380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program [ 33.457711] task: ffff8801c4503000 task.stack: ffff8801c4668000 [ 33.463733] RIP: 0010:[] [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 33.473003] RSP: 0018:ffff8801c466fb20 EFLAGS: 00010202 [ 33.478421] RAX: 1ffff1001527702d RBX: ffff8800a93b8158 RCX: 0000000000000001 [ 33.485658] RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffff8800a939c21c [ 33.492896] RBP: ffff8801c466fb70 R08: 0000000000000000 R09: 0000000000000001 [ 33.500139] R10: 0000000000000000 R11: 1ffff100388cdf3e R12: 0000000000000001 executing program executing program [ 33.507376] R13: 0000000000000008 R14: 0000000000000000 R15: dffffc0000000000 [ 33.514619] FS: 00007f6e7709f700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 33.522815] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.528665] CR2: 00007f6e7707ddb8 CR3: 00000000afd26000 CR4: 0000000000160670 [ 33.535906] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.543145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.550385] Stack: [ 33.552518] ffff8800a93b8170 ffffed001527702b ffffed001527702e ffff8800a93b8168 executing program executing program [ 33.560493] ffff8800a939c200 ffff8800a93b8140 0000000000000000 0000000000000000 [ 33.568461] 0000000000000000 ffff8800a93b8238 ffff8801c466fbb0 ffffffff825b89d5 [ 33.576423] Call Trace: [ 33.578982] [] sg_finish_rem_req+0x2b5/0x340 [ 33.585005] [] sg_read+0xa1b/0x1490 [ 33.590260] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.597240] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.603878] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 executing program executing program [ 33.610860] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 33.617670] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 33.624310] [] __vfs_read+0x103/0x440 [ 33.629736] [] ? vfs_iter_write+0x2d0/0x2d0 [ 33.635673] [] ? fsnotify+0x5ad/0xee0 [ 33.641100] [] ? fsnotify+0xee0/0xee0 [ 33.646526] [] ? avc_policy_seqno+0x9/0x20 [ 33.652382] [] ? selinux_file_permission+0x348/0x460 executing program executing program [ 33.659106] [] ? security_file_permission+0x89/0x1e0 [ 33.665828] [] ? rw_verify_area+0x100/0x2f0 [ 33.671769] [] vfs_read+0x123/0x3a0 [ 33.677027] [] SyS_read+0xd9/0x1b0 [ 33.682190] [] ? do_sendfile+0xd30/0xd30 [ 33.687869] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 33.694330] [] entry_SYSCALL_64_fastpath+0x1c/0x98 executing program executing program executing program executing program executing program executing program [ 33.700874] Code: 45 b8 eb 3e e8 a7 87 da fe 48 8b 45 c8 48 c1 e8 03 42 80 3c 38 00 0f 85 3a 01 00 00 4c 8b 73 10 4b 8d 14 2e 48 89 d1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 0b 01 00 00 48 8b 12 49 83 c5 08 48 85 d2 [ 33.727406] RIP [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 33.734341] RSP [ 33.738585] ---[ end trace 4d0cd7a1a2787dcb ]--- [ 33.743371] Kernel panic - not syncing: Fatal exception [ 33.749115] Dumping ftrace buffer: [ 33.752627] (ftrace buffer empty) [ 33.756304] Kernel Offset: disabled [ 33.759900] Rebooting in 86400 seconds..