[....] Starting file context mai[ 16.124198] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) ntaining 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: [ 20.261492] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.518591] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.361994] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 27.799633] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 33.196465] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.315637] sg_write: data in/out 2083837667/98 bytes for SCSI command 0x8d-- guessing data in; [ 33.315637] program syzkaller863491 not setting count and/or reply_len properly [ 33.322102] sg_write: data in/out 2083837667/98 bytes for SCSI command 0x8d-- guessing data in; [ 33.322102] program syzkaller863491 not setting count and/or reply_len properly [ 33.361184] kasan: CONFIG_KASAN_INLINE enabled executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.365849] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.431736] Dumping ftrace buffer: [ 33.435256] (ftrace buffer empty) [ 33.438951] Modules linked in: [ 33.442228] CPU: 1 PID: 3343 Comm: syzkaller863491 Not tainted 4.4.107-g610c835 #4 [ 33.449898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.459220] task: ffff8801d08b8000 task.stack: ffff8801d0838000 [ 33.465276] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 33.473505] RSP: 0018:ffff8801d083fa90 EFLAGS: 00010a07 [ 33.478919] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 33.486156] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 33.493392] RBP: ffff8801d083faa0 R08: ffffed003a101b78 R09: 0000000000000000 [ 33.500629] R10: fffbe8da00000000 R11: ffffed003a101b78 R12: 0000000000000004 [ 33.507865] R13: 0000000000000020 R14: ffff8800b40c4200 R15: dffffc0000000000 [ 33.515104] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76dfb40 [ 33.523297] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.529145] CR2: 000000002002b000 CR3: 00000000b9ffe000 CR4: 00000000001406e0 [ 33.536386] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.543623] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.550859] Stack: [ 33.552972] 0000000000000000 ffff8800b40c4358 ffff8801d083fb00 ffffffff825b8cf1 [ 33.560921] ffff8800b40c4370 ffffed001681886b ffffed001681886e ffff8800b40c4368 [ 33.568878] dead4ead00000000 ffff8800b40c4340 0000000000000000 0000000000000000 [ 33.576836] Call Trace: [ 33.579392] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 33.585852] [] sg_finish_rem_req+0x2b5/0x340 [ 33.591875] [] sg_read+0xa21/0x1490 [ 33.597121] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 33.603756] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.610735] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 33.617367] [] __vfs_read+0x103/0x440 [ 33.622786] [] ? vfs_iter_write+0x2d0/0x2d0 [ 33.628724] [] ? fsnotify+0x5ad/0xee0 [ 33.634139] [] ? fsnotify+0xee0/0xee0 [ 33.639559] [] ? avc_policy_seqno+0x9/0x20 [ 33.645419] [] ? selinux_file_permission+0x348/0x460 [ 33.652139] [] ? security_file_permission+0x89/0x1e0 [ 33.658860] [] ? rw_verify_area+0x100/0x2f0 [ 33.664798] [] vfs_read+0x123/0x3a0 [ 33.670043] [] SyS_read+0xd9/0x1b0 [ 33.675199] [] ? do_sendfile+0xd30/0xd30 [ 33.680875] [] ? do_fast_syscall_32+0xd7/0x890 [ 33.687074] [] ? do_sendfile+0xd30/0xd30 [ 33.692751] [] do_fast_syscall_32+0x314/0x890 [ 33.698866] [] 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 [ 33.704887] 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 [ 33.731297] RIP [] __free_pages+0x21/0x90 [ 33.737177] 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 [ 34.041200] ---[ end trace 62064dcb591665d7 ]--- executing program executing program executing program executing program executing program executing program executing program [ 34.087620] Kernel panic - not syncing: Fatal exception [ 34.093454] Dumping ftrace buffer: [ 34.096971] (ftrace buffer empty) [ 34.100648] Kernel Offset: disabled [ 34.104238] Rebooting in 86400 seconds..