[ 15.560274] 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: [ 21.235144] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.519631] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.261770] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available) [ 37.623178] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) Warning: Permanently added '10.128.15.213' (ECDSA) to the list of known hosts. [ 42.999713] random: sshd: uninitialized urandom read (32 bytes read, 109 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 [ 43.104562] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program [ 43.149422] IPVS: Creating netns size=2552 id=2 [ 43.152618] kasan: CONFIG_KASAN_INLINE enabled [ 43.152625] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.152627] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.152631] Dumping ftrace buffer: [ 43.152633] (ftrace buffer empty) [ 43.152636] Modules linked in: [ 43.152640] CPU: 0 PID: 3334 Comm: syzkaller907278 Not tainted 4.4.107-g610c835 #4 [ 43.152643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.152645] task: ffff8801d0d95f00 task.stack: ffff8801cd578000 [ 43.152656] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 43.152658] RSP: 0018:ffff8801cd57f970 EFLAGS: 00010a07 [ 43.152661] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 43.152663] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 43.152665] RBP: ffff8801cd57f980 R08: 0000000000000001 R09: 0000000000000001 [ 43.152667] R10: 0000000000000000 R11: 1ffff10039aaff0c R12: 0000000000000004 [ 43.152669] R13: 0000000000000020 R14: ffff8800b150c200 R15: dffffc0000000000 [ 43.152672] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009b2f840 [ 43.152675] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 43.152677] CR2: 0000000020568000 CR3: 00000001d200f000 CR4: 00000000001406f0 [ 43.152681] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.152684] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.152684] Stack: [ 43.152689] 0000000000000246 ffff8800b150c358 ffff8801cd57f9e0 ffffffff825b8cf1 [ 43.152693] ffff8800b150c370 ffffed00162a186b ffffed00162a186e ffff8800b150c368 [ 43.152697] dead4ead00000000 ffff8800b150c340 0000000000000000 0000000000000000 [ 43.152698] Call Trace: [ 43.152705] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 43.152709] [] sg_finish_rem_req+0x2b5/0x340 [ 43.152713] [] sg_new_read.isra.18+0x336/0x3c0 [ 43.152717] [] sg_read+0x8c2/0x1490 [ 43.152721] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.152725] [] ? fsnotify+0xee0/0xee0 [ 43.152732] [] ? avc_policy_seqno+0x9/0x20 [ 43.152738] [] do_loop_readv_writev+0x141/0x1e0 [ 43.152743] [] ? security_file_permission+0x89/0x1e0 [ 43.152746] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.152750] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.152754] [] compat_do_readv_writev+0x5df/0x6e0 [ 43.152758] [] ? vfs_writev+0xb0/0xb0 [ 43.152762] [] ? _raw_spin_unlock+0x2c/0x50 [ 43.152768] [] ? handle_mm_fault+0x3f2/0x3190 [ 43.152772] [] ? rw_verify_area+0x100/0x2f0 [ 43.152776] [] compat_readv+0xd9/0x140 [ 43.152779] [] compat_SyS_readv+0xd8/0x1b0 [ 43.152782] [] ? SyS_pwritev+0x230/0x230 [ 43.152788] [] ? do_fast_syscall_32+0xd7/0x890 [ 43.152791] [] ? SyS_pwritev+0x230/0x230 [ 43.152794] [] do_fast_syscall_32+0x314/0x890 [ 43.152799] [] sysenter_flags_fixed+0xd/0x17 [ 43.152853] 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 [ 43.152857] RIP [] __free_pages+0x21/0x90 [ 43.152858] RSP [ 43.152862] ---[ end trace f44778f3e8de7298 ]--- [ 43.152865] Kernel panic - not syncing: Fatal exception [ 43.154511] Dumping ftrace buffer: [ 43.154513] (ftrace buffer empty) [ 43.154514] Kernel Offset: disabled [ 43.506898] Rebooting in 86400 seconds..