[ 14.143789] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.945900] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 28.502147] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 29.011692] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) [ 29.154185] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-1,10.128.15.199' (ECDSA) to the list of known hosts. [ 34.522013] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) executing program [ 34.625834] kasan: CONFIG_KASAN_INLINE enabled [ 34.631186] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.644613] Dumping ftrace buffer: [ 34.648116] (ftrace buffer empty) [ 34.651793] Modules linked in: [ 34.655074] CPU: 1 PID: 3326 Comm: syzkaller952277 Not tainted 4.4.104-ged884eb #2 [ 34.662745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.672067] task: ffff8801d55aaf80 task.stack: ffff8801d7968000 [ 34.678086] RIP: 0010:[] [] sg_read+0x93e/0x1260 [ 34.686135] RSP: 0018:ffff8801d796fb20 EFLAGS: 00010246 [ 34.691548] RAX: dffffc0000000000 RBX: ffff8801d601f420 RCX: 000000000000000c [ 34.698782] RDX: 0000000000000000 RSI: ffff8801d601f444 RDI: ffff8801d5468170 [ 34.706017] RBP: ffff8801d796fc18 R08: 0000000000000000 R09: 0000000000000001 [ 34.713248] R10: 0000000000000000 R11: 1ffff1003af2df2a R12: 0000000000000000 [ 34.720482] R13: ffff8801d5468140 R14: 0000000000000000 R15: 00000000000000bb [ 34.727726] FS: 00007f3043921700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 34.735913] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.741756] CR2: 000000002001aff7 CR3: 00000001d94bc000 CR4: 00000000001406e0 [ 34.748995] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.756239] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.763473] Stack: [ 34.765585] ffff8801d796fd80 ffff8801d5468158 ffff8801d796fb78 ffff8801d5468168 [ 34.773528] 00000000000000df ffff8801d796fb78 0000000020fc4000 0000000000001000 [ 34.781472] 1ffff1003af2df6e 0000000020acef45 0000000041b58ab3 ffffffff83fa5dde [ 34.789412] Call Trace: [ 34.791963] [] ? sg_proc_seq_show_debug+0xca0/0xca0 [ 34.798593] [] ? fsnotify+0xe40/0xe40 [ 34.804008] [] do_loop_readv_writev+0x11c/0x1e0 [ 34.810289] [] ? security_file_permission+0x13d/0x190 [ 34.817106] [] ? sg_proc_seq_show_debug+0xca0/0xca0 [ 34.823732] [] ? sg_proc_seq_show_debug+0xca0/0xca0 [ 34.830359] [] do_readv_writev+0x552/0x660 [ 34.836203] [] ? vfs_write+0x520/0x520 [ 34.841703] [] ? handle_mm_fault+0xb02/0x39b0 [ 34.847810] [] ? __lock_is_held+0xa1/0xf0 [ 34.853572] [] ? __fget+0x1c2/0x320 [ 34.858809] [] ? __fget+0x1df/0x320 [ 34.864047] [] ? __fget+0x42/0x320 [ 34.869201] [] vfs_readv+0x5a/0xa0 [ 34.874365] [] ? __fdget_pos+0x13/0xb0 [ 34.879867] [] SyS_readv+0xd3/0x260 [ 34.885116] [] ? rw_copy_check_uvector+0x380/0x380 [ 34.891669] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 34.898215] [] entry_SYSCALL_64_fastpath+0x16/0x76 executing program [ 34.904757] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a9 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 65 28 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 08 00 00 49 8b 04 24 48 85 c0 0f 84 ee 04 [ 34.931147] RIP [] sg_read+0x93e/0x1260 [ 34.936853] RSP [ 34.940712] ---[ end trace 9aefe84434e645e2 ]--- [ 34.945476] Kernel panic - not syncing: Fatal exception [ 34.951198] Dumping ftrace buffer: [ 34.954713] (ftrace buffer empty) [ 34.958393] Kernel Offset: disabled [ 34.961986] Rebooting in 86400 seconds..