[ 15.601215] 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: [ 21.755958] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.192444] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 23.025030] random: sshd: uninitialized urandom read (32 bytes read, 82 bits of entropy available) [ 34.546591] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. [ 39.946859] random: sshd: uninitialized urandom read (32 bytes read, 99 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 [ 40.045581] sg_write: data in/out 36090/1 bytes for SCSI command 0xe2-- guessing data in; [ 40.045581] program syzkaller141216 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.792099] random: nonblocking pool is initialized [ 43.793493] kasan: CONFIG_KASAN_INLINE enabled [ 43.793500] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.793503] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.793507] Dumping ftrace buffer: [ 43.793510] (ftrace buffer empty) [ 43.793512] Modules linked in: [ 43.793518] CPU: 1 PID: 4086 Comm: syzkaller141216 Not tainted 4.4.110-gdac1439 #13 [ 43.793521] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.793524] task: ffff8801ce995f00 task.stack: ffff8800b2610000 [ 43.793535] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 43.793538] RSP: 0018:ffff8800b2617970 EFLAGS: 00010a07 [ 43.793540] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b [ 43.793543] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 43.793545] RBP: ffff8800b2617980 R08: 0000000048000000 R09: 0000000000001e30 [ 43.793547] R10: 0000000000002100 R11: 1ffff100164c2f0c R12: 0000000000000004 [ 43.793549] R13: 0000000000000020 R14: ffff8800b2660000 R15: dffffc0000000000 [ 43.793552] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000096e9900 [ 43.793555] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 43.793557] CR2: 00000000203aafa0 CR3: 00000000b2592000 CR4: 0000000000160670 [ 43.793562] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.793564] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.793565] Stack: [ 43.793570] 0000000000000246 ffff8800b2660158 ffff8800b26179e0 ffffffff825b9c81 [ 43.793574] ffff8800b2660170 ffffed00164cc02b ffffed00164cc02e ffff8800b2660168 [ 43.793578] dead4ead00000000 ffff8800b2660140 0000000000000000 0000000000000000 [ 43.793579] Call Trace: [ 43.793588] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 43.793591] [] sg_finish_rem_req+0x2b5/0x340 [ 43.793595] [] sg_new_read.isra.18+0x17d/0x3c0 [ 43.793599] [] sg_read+0x8c2/0x1490 [ 43.793606] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.793611] [] ? fsnotify+0xee0/0xee0 [ 43.793618] [] ? avc_policy_seqno+0x9/0x20 [ 43.793626] [] do_loop_readv_writev+0x141/0x1e0 [ 43.793630] [] ? security_file_permission+0x89/0x1e0 [ 43.793634] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.793637] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.793642] [] compat_do_readv_writev+0x5df/0x6e0 [ 43.793645] [] ? vfs_writev+0xb0/0xb0 [ 43.793651] [] ? _raw_spin_unlock+0x2c/0x50 [ 43.793657] [] ? handle_mm_fault+0x3f2/0x3190 [ 43.793660] [] ? rw_verify_area+0x100/0x2f0 [ 43.793664] [] compat_readv+0xd9/0x140 [ 43.793668] [] compat_SyS_readv+0xd8/0x1b0 [ 43.793671] [] ? SyS_pwritev+0x230/0x230 [ 43.793677] [] ? do_fast_syscall_32+0xd7/0x890 [ 43.793680] [] ? SyS_pwritev+0x230/0x230 [ 43.793683] [] do_fast_syscall_32+0x314/0x890 [ 43.793687] [] sysenter_flags_fixed+0xd/0x17 [ 43.793735] Code: 96 a4 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 [ 43.793739] RIP [] __free_pages+0x21/0x90 [ 43.793740] RSP [ 43.797531] ---[ end trace 9d77c7962491938e ]--- [ 43.797536] Kernel panic - not syncing: Fatal exception [ 44.138886] Dumping ftrace buffer: [ 44.142476] (ftrace buffer empty) [ 44.146184] Kernel Offset: disabled [ 44.149777] Rebooting in 86400 seconds..