[....] Starting file context maintaining daemon: restorecond[?2[ 16.615777] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) 5l[?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: [ 19.757138] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.101220] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.799847] random: sshd: uninitialized urandom read (32 bytes read, 78 bits of entropy available) [ 20.969687] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. [ 26.409616] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.178687] kasan: CONFIG_KASAN_INLINE enabled [ 28.185591] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.217166] Dumping ftrace buffer: [ 28.220678] (ftrace buffer empty) [ 28.224356] Modules linked in: [ 28.227638] CPU: 1 PID: 3343 Comm: syzkaller356607 Not tainted 4.4.107-g610c835 #12 [ 28.235398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.244722] task: ffff8800b04717c0 task.stack: ffff8801d1418000 [ 28.250746] RIP: 0010:[] [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 28.260025] RSP: 0018:ffff8801d141fb20 EFLAGS: 00010202 [ 28.265452] RAX: 1ffff1003972544d RBX: ffff8801cb92a258 RCX: 0000000000000001 [ 28.272690] RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffff8801cb93801c [ 28.279927] RBP: ffff8801d141fb70 R08: ffffed003af5efe4 R09: ffff8801d7af7f00 [ 28.287176] R10: 0000000000000005 R11: ffffed003af5efe4 R12: 0000000000000001 [ 28.294418] R13: 0000000000000008 R14: 0000000000000000 R15: dffffc0000000000 [ 28.301655] FS: 00007f07424c7700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.309850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.315701] CR2: 000000002048f000 CR3: 00000001d1630000 CR4: 00000000001406e0 [ 28.322940] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.330179] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.337418] Stack: [ 28.339534] ffff8801cb92a270 ffffed003972544b ffffed003972544e ffff8801cb92a268 [ 28.347493] ffff8801cb938000 ffff8801cb92a240 0000000000000000 0000000000000000 [ 28.355463] 0000000000000000 ffff8801cb92a338 ffff8801d141fbb0 ffffffff825b90b5 [ 28.363422] Call Trace: [ 28.365980] [] sg_finish_rem_req+0x2b5/0x340 [ 28.372008] [] sg_read+0xa21/0x1490 [ 28.377256] [] ? do_futex+0x3e3/0x1670 [ 28.382763] [] ? SyS_openat+0x30/0x40 [ 28.388193] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.394829] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 28.401810] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 28.408792] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.415425] [] __vfs_read+0x103/0x440 [ 28.420843] [] ? vfs_iter_write+0x2d0/0x2d0 [ 28.426782] [] ? fsnotify+0x5ad/0xee0 [ 28.432199] [] ? fsnotify+0xee0/0xee0 [ 28.437619] [] ? avc_policy_seqno+0x9/0x20 [ 28.443472] [] ? selinux_file_permission+0x348/0x460 [ 28.450191] [] ? security_file_permission+0x89/0x1e0 [ 28.456912] [] ? rw_verify_area+0x100/0x2f0 [ 28.462849] [] vfs_read+0x123/0x3a0 [ 28.468093] [] SyS_read+0xd9/0x1b0 [ 28.473261] [] ? do_sendfile+0xd30/0xd30 executing program executing program executing program executing program executing program executing program [ 28.478941] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 28.485403] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 28.491945] Code: 45 b8 eb 3e e8 a7 4e 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 [ 28.518425] RIP [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 28.525358] RSP executing program executing program executing program executing program [ 28.564474] ---[ end trace 1e6227877d41434b ]--- [ 28.583265] Kernel panic - not syncing: Fatal exception [ 28.588711] Dumping ftrace buffer: [ 28.592222] (ftrace buffer empty) [ 28.595900] Kernel Offset: disabled [ 28.599492] Rebooting in 86400 seconds..