[ 16.358459] 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: [ 20.902821] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.287814] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.142842] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 22.301493] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. [ 27.678814] random: sshd: uninitialized urandom read (32 bytes read, 111 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.627142] random: nonblocking pool is initialized executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.065584] kasan: CONFIG_KASAN_INLINE enabled[ 30.066764] kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.066783] Dumping ftrace buffer: [ 30.066786] (ftrace buffer empty) [ 30.066788] Modules linked in: [ 30.066797] CPU: 0 PID: 3320 Comm: syzkaller215524 Not tainted 4.4.111-g1849cd3 #19 [ 30.066800] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.066804] task: ffff8801d1bec740 task.stack: ffff8800b4258000 [ 30.066807] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.066821] RSP: 0018:ffff8800b425f970 EFLAGS: 00010a07 [ 30.066825] RAX: dffffc0000000000 RBX: dead4eac00000000 RCX: ffffffff825b9ebb [ 30.066828] RDX: 1bd5a9d580000003 RSI: 0000000000000001 RDI: dead4eac0000001c [ 30.066831] RBP: ffff8800b425f980 R08: 0000000000000001 R09: 0000000000000001 [ 30.066835] R10: 0000000000000000 R11: 1ffff1001684bf0c R12: 0000000000000004 [ 30.066838] R13: 0000000000000020 R14: ffff8801ca292100 R15: dffffc0000000000 [ 30.066843] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009e52840 [ 30.066847] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.066850] CR2: 0000000020dc8000 CR3: 00000000b4d38000 CR4: 0000000000160670 [ 30.066857] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.066860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.066861] Stack: [ 30.066867] ffffffff837764a9 ffff8801ca292258 ffff8800b425f9e0 ffffffff825b9ee1 [ 30.066876] ffff8801ca292270 ffffed003945244b ffffed003945244e ffff8801ca292268 [ 30.066883] dead4eac00000000 ffff8801ca292240 0000000000000000 0000000000000000 [ 30.066890] Call Trace: [ 30.066899] [] ? retint_kernel+0x2d/0x2d [ 30.066908] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.066915] [] sg_finish_rem_req+0x2b5/0x340 [ 30.066921] [] sg_new_read.isra.18+0x336/0x3c0 [ 30.066928] [] sg_read+0x8c2/0x1490 [ 30.066935] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.066941] [] ? fsnotify+0xee0/0xee0 [ 30.066949] [] ? avc_policy_seqno+0x9/0x20 [ 30.066959] [] do_loop_readv_writev+0x141/0x1e0 [ 30.066966] [] ? security_file_permission+0x89/0x1e0 [ 30.066972] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.066979] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.066986] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.066992] [] ? vfs_writev+0xb0/0xb0 [ 30.066998] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.067005] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.067012] [] ? rw_verify_area+0x100/0x2f0 [ 30.067019] [] compat_readv+0xd9/0x140 [ 30.067024] [] compat_SyS_readv+0xd8/0x1b0 [ 30.067030] [] ? SyS_pwritev+0x230/0x230 [ 30.067036] [] ? do_fast_syscall_32+0xd7/0x890 [ 30.067041] [] ? SyS_pwritev+0x230/0x230 [ 30.067047] [] do_fast_syscall_32+0x314/0x890 [ 30.067054] [] sysenter_flags_fixed+0xd/0x17 [ 30.067055] 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 [ 30.067156] RIP [] __free_pages+0x21/0x90 [ 30.067163] RSP [ 30.069747] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#2] PREEMPT SMP KASAN [ 30.069763] Dumping ftrace buffer: [ 30.069765] (ftrace buffer empty) [ 30.069767] Modules linked in: [ 30.069775] CPU: 0 PID: 3322 Comm: syzkaller215524 Tainted: G D 4.4.111-g1849cd3 #19 [ 30.069778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.069782] task: ffff8801d1be97c0 task.stack: ffff8800b42a8000 [ 30.069785] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.069796] RSP: 0018:ffff8800b42af970 EFLAGS: 00010a07 [ 30.069800] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 30.069803] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 30.069807] RBP: ffff8800b42af980 R08: 0000000000000000 R09: 0000000000000000 [ 30.069810] R10: 0000000000000000 R11: 1ffff10016855f0c R12: 0000000000000004 [ 30.069813] R13: 0000000000000020 R14: ffff8801ca294200 R15: dffffc0000000000 [ 30.069818] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009e52840 [ 30.069822] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.069825] CR2: 0000000020dc8000 CR3: 00000000b42ba000 CR4: 0000000000160670 [ 30.069831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.069834] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.069835] Stack: [ 30.069837] ffffffff837764a9 ffff8801ca294358 ffff8800b42af9e0 ffffffff825b9ee1 [ 30.069845] ffff8801ca294370 ffffed003945286b ffffed003945286e ffff8801ca294368 [ 30.069853] dead4ead00000000 ffff8801ca294340 0000000000000000 0000000000000000 [ 30.069860] Call Trace: [ 30.069867] [] ? retint_kernel+0x2d/0x2d [ 30.069875] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.069882] [] sg_finish_rem_req+0x2b5/0x340 [ 30.069888] [] sg_new_read.isra.18+0x336/0x3c0 [ 30.069894] [] sg_read+0x8c2/0x1490 [ 30.069901] [] ? sg_ioctl+0x2c20/0x2c20 [ 30.069908] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.069913] [] ? fsnotify+0xee0/0xee0 [ 30.069921] [] ? avc_policy_seqno+0x9/0x20 [ 30.069929] [] do_loop_readv_writev+0x141/0x1e0 [ 30.069935] [] ? security_file_permission+0x89/0x1e0 [ 30.069942] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.069948] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.069955] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.069961] [] ? vfs_writev+0xb0/0xb0 [ 30.069968] [] ? __lru_cache_add+0x164/0x240 [ 30.069975] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.069982] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.069989] [] ? rw_verify_area+0x100/0x2f0 [ 30.069995] [] compat_readv+0xd9/0x140 [ 30.070001] [] compat_SyS_readv+0xd8/0x1b0 [ 30.070006] [] ? SyS_pwritev+0x230/0x230 [ 30.070012] [] ? SyS_pwritev+0x230/0x230 [ 30.070019] [] do_fast_syscall_32+0x314/0x890 [ 30.070025] [] sysenter_flags_fixed+0xd/0x17 [ 30.070026] 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 [ 30.070127] RIP [] __free_pages+0x21/0x90 [ 30.070134] RSP [ 30.070138] ---[ end trace bfd53ec0f8309b13 ]--- [ 30.070142] Kernel panic - not syncing: Fatal exception [ 30.074893] Dumping ftrace buffer: [ 30.074895] (ftrace buffer empty) [ 30.074897] Kernel Offset: disabled [ 30.786200] Rebooting in 86400 seconds..