[ 16.594743] 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: [ 20.754924] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.082953] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.913218] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available) [ 33.863757] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.0.47' (ECDSA) to the list of known hosts. [ 39.534612] random: sshd: uninitialized urandom read (32 bytes read, 118 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 [ 39.633010] sg_write: data in/out 822404280/64 bytes for SCSI command 0x12-- guessing data in; [ 39.633010] program syzkaller754366 not setting count and/or reply_len properly [ 39.638340] sg_write: data in/out 822404280/64 bytes for SCSI command 0x12-- guessing data in; [ 39.638340] program syzkaller754366 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 39.677885] kasan: CONFIG_KASAN_INLINE enabled executing program [ 39.702068] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.749798] Dumping ftrace buffer: [ 39.753303] (ftrace buffer empty) [ 39.756989] Modules linked in: [ 39.760264] CPU: 1 PID: 3356 Comm: syzkaller754366 Not tainted 4.4.107-g610c835 #4 [ 39.767952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.777283] task: ffff8801d197af80 task.stack: ffff8801cccb0000 [ 39.783308] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 39.791530] RSP: 0018:ffff8801cccb79c0 EFLAGS: 00010a07 [ 39.796941] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 39.804179] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 39.811414] RBP: ffff8801cccb79d0 R08: ffffed0016a1d1b4 R09: ffff8800b50e8d80 [ 39.818660] R10: 0000000000000005 R11: ffffed0016a1d1b4 R12: 0000000000000004 [ 39.825897] R13: 0000000000000020 R14: ffff8801d2b5a100 R15: dffffc0000000000 [ 39.833141] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76e2b40 [ 39.841338] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 39.847187] CR2: 0000000020005000 CR3: 00000001d19d8000 CR4: 00000000001406e0 [ 39.854428] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.861663] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.868903] Stack: [ 39.871020] 0000000000000000 ffff8801d2b5a258 ffff8801cccb7a30 ffffffff825b8cf1 [ 39.878965] ffff8801d2b5a270 ffffed003a56b44b ffffed003a56b44e ffff8801d2b5a268 [ 39.886908] dead4ead00000000 ffff8801d2b5a240 0000000000000000 0000000000000000 [ 39.894850] Call Trace: [ 39.897406] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 39.903870] [] sg_finish_rem_req+0x2b5/0x340 [ 39.909893] [] sg_read+0xa21/0x1490 [ 39.915137] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 39.921769] [] ? fsnotify+0xee0/0xee0 [ 39.927190] [] ? avc_policy_seqno+0x9/0x20 [ 39.933041] [] do_loop_readv_writev+0x141/0x1e0 [ 39.939324] [] ? security_file_permission+0x89/0x1e0 [ 39.946043] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 39.952676] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 39.959311] [] compat_do_readv_writev+0x5df/0x6e0 [ 39.965781] [] ? vfs_writev+0xb0/0xb0 [ 39.971196] [] ? __fget+0x232/0x3b0 [ 39.976437] [] ? __fget+0x47/0x3b0 [ 39.981592] [] compat_readv+0xd9/0x140 [ 39.987093] [] compat_SyS_readv+0xd8/0x1b0 [ 39.992940] [] ? SyS_pwritev+0x230/0x230 [ 39.998615] [] ? do_fast_syscall_32+0xd7/0x890 [ 40.004809] [] ? SyS_pwritev+0x230/0x230 [ 40.010484] [] do_fast_syscall_32+0x314/0x890 [ 40.016598] [] sysenter_flags_fixed+0xd/0x17 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 40.022620] Code: 76 ae 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 40.048919] RIP [] __free_pages+0x21/0x90 [ 40.054794] RSP executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 40.233177] ---[ end trace b5a8521ee232bf1e ]--- [ 40.237959] Kernel panic - not syncing: Fatal exception [ 40.243327] Dumping ftrace buffer: [ 40.246836] (ftrace buffer empty) [ 40.250515] Kernel Offset: disabled [ 40.254118] Rebooting in 86400 seconds..