[ 16.149412] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?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: [ 21.041673] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.264830] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.036151] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 30.059725] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 35.434896] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) executing program [ 35.546440] sg_write: data in/out 486575354/302 bytes for SCSI command 0x67-- guessing data in; [ 35.546440] program syzkaller118848 not setting count and/or reply_len properly [ 35.565941] kasan: CONFIG_KASAN_INLINE enabled [ 35.570369] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.583262] Dumping ftrace buffer: [ 35.586780] (ftrace buffer empty) [ 35.590468] Modules linked in: [ 35.593760] CPU: 1 PID: 3325 Comm: syzkaller118848 Not tainted 4.4.110-gdac1439 #13 [ 35.601522] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.610862] task: ffff8801d1845f00 task.stack: ffff8800b4058000 [ 35.616889] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 35.624951] RSP: 0018:ffff8800b405fa80 EFLAGS: 00010246 [ 35.630366] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bc124 [ 35.637609] RDX: 0000000000000000 RSI: 0000000020701fe6 RDI: ffff8800b4e2c370 [ 35.644847] RBP: ffff8800b405fb88 R08: 0000000000000000 R09: 0000000000000001 [ 35.652090] R10: 0000000000000000 R11: 1ffff1001680bf16 R12: 000000000000001a [ 35.659332] R13: 0000000000000000 R14: ffff8801d05c8120 R15: ffff8800b4e2c340 [ 35.666573] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000099c4840 [ 35.674768] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 35.680618] CR2: 0000000020701fc2 CR3: 00000000b63a4000 CR4: 0000000000160670 [ 35.687877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.695131] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.702369] Stack: [ 35.704498] 0000000000000002 0000000000000002 ffff8800b405fc40 ffff8800b4e2c358 [ 35.712453] bcd25e170143cc1d ffff8800b4e2c368 000000000000003e 000000001199c3fa [ 35.720417] ffff8801d5740f00 0000000000001000 1ffff1001680bf5c 0000000020701fe6 [ 35.728388] Call Trace: [ 35.730951] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 35.737588] [] ? fsnotify+0xee0/0xee0 [ 35.743007] [] ? avc_policy_seqno+0x9/0x20 [ 35.748866] [] do_loop_readv_writev+0x141/0x1e0 [ 35.755154] [] ? security_file_permission+0x89/0x1e0 [ 35.761875] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 35.768524] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 35.775161] [] compat_do_readv_writev+0x5df/0x6e0 [ 35.781627] [] ? vfs_writev+0xb0/0xb0 [ 35.787054] [] ? _raw_spin_unlock+0x2c/0x50 [ 35.792996] [] ? handle_mm_fault+0x3f2/0x3190 [ 35.799113] [] ? security_file_permission+0x89/0x1e0 [ 35.806752] [] ? rw_verify_area+0x100/0x2f0 [ 35.812694] [] compat_readv+0xd9/0x140 [ 35.818211] [] compat_SyS_readv+0xd8/0x1b0 [ 35.824063] [] ? SyS_pwritev+0x230/0x230 [ 35.829743] [] ? do_fast_syscall_32+0xd7/0x890 [ 35.835941] [] ? SyS_pwritev+0x230/0x230 [ 35.841621] [] do_fast_syscall_32+0x314/0x890 [ 35.847747] [] sysenter_flags_fixed+0xd/0x17 [ 35.853793] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 35.880229] RIP [] sg_read+0xd1d/0x1490 [ 35.885944] RSP [ 35.889781] ---[ end trace c3b01ee7b9b6b40e ]--- [ 35.894554] Kernel panic - not syncing: Fatal exception [ 35.900312] Dumping ftrace buffer: [ 35.903831] (ftrace buffer empty) [ 35.907514] Kernel Offset: disabled [ 35.911126] Rebooting in 86400 seconds..