[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.748603] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 17.379470] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 17.589168] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.443829] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 18.627752] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) Warning: Permanently added '10.128.15.217' (ECDSA) to the list of known hosts. [ 24.040642] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) executing program executing program executing program executing program executing program executing program [ 24.202504] kasan: CONFIG_KASAN_INLINE enabled [ 24.206940] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.219750] Dumping ftrace buffer: [ 24.223257] (ftrace buffer empty) [ 24.226932] Modules linked in: [ 24.230204] CPU: 1 PID: 3318 Comm: syzkaller148613 Not tainted 4.4.111-g3301b55 #24 [ 24.237961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.247282] task: ffff8801d1e9af80 task.stack: ffff8801d0ce0000 [ 24.253304] RIP: 0010:[] [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 24.262580] RSP: 0018:ffff8801d0ce7b20 EFLAGS: 00010202 [ 24.267994] RAX: 1ffff1001678286d RBX: ffff8800b3c14358 RCX: 0000000000000002 [ 24.275231] RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8800b433001c [ 24.282468] RBP: ffff8801d0ce7b70 R08: 0000000000000000 R09: 0000000000000001 [ 24.289705] R10: 0000000000000000 R11: 1ffff1003a19cf3e R12: 0000000000000002 [ 24.296943] R13: 0000000000000010 R14: 0000000000000000 R15: dffffc0000000000 [ 24.304180] FS: 00007faad31e3700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.312372] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.318219] CR2: 0000000020b18000 CR3: 00000001d0dde000 CR4: 0000000000160670 [ 24.325979] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.333219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.340453] Stack: [ 24.342567] ffff8800b3c14370 ffffed001678286b ffffed001678286e ffff8800b3c14368 [ 24.350520] ffff8800b4330000 ffff8800b3c14340 0000000000000000 0000000000000000 [ 24.358478] 0000000000000000 ffff8800b3c14438 ffff8801d0ce7bb0 ffffffff825ba2a5 [ 24.366430] Call Trace: [ 24.368995] [] sg_finish_rem_req+0x2b5/0x340 [ 24.375022] [] sg_read+0xa21/0x1490 [ 24.380269] [] ? do_futex+0x3e3/0x1670 [ 24.385772] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 24.392403] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 24.399383] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 24.406362] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 24.412996] [] __vfs_read+0x103/0x440 [ 24.418413] [] ? vfs_iter_write+0x2d0/0x2d0 [ 24.424352] [] ? fsnotify+0x5ad/0xee0 [ 24.429767] [] ? fsnotify+0xee0/0xee0 [ 24.435187] [] ? avc_policy_seqno+0x9/0x20 [ 24.441037] [] ? selinux_file_permission+0x348/0x460 [ 24.447756] [] ? security_file_permission+0x89/0x1e0 [ 24.454473] [] ? rw_verify_area+0x100/0x2f0 [ 24.460409] [] vfs_read+0x123/0x3a0 [ 24.465662] [] SyS_read+0xd9/0x1b0 [ 24.470824] [] ? do_sendfile+0xd30/0xd30 [ 24.476502] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 24.482965] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 24.489506] Code: 45 b8 eb 3e e8 07 60 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 [ 24.515949] RIP [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 24.522871] RSP [ 24.526587] ---[ end trace 63e3609cf69f5940 ]--- [ 24.531335] Kernel panic - not syncing: Fatal exception [ 24.537345] Dumping ftrace buffer: [ 24.540859] (ftrace buffer empty) [ 24.544534] Kernel Offset: disabled [ 24.548126] Rebooting in 86400 seconds..