[....] Starting file context maintaining daemon:[ 16.635492] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.617839] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.000998] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.827218] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available) [ 23.005692] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. [ 28.388330] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) executing program [ 28.496132] kasan: CONFIG_KASAN_INLINE enabled [ 28.501330] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.514150] Dumping ftrace buffer: [ 28.517656] (ftrace buffer empty) [ 28.521331] Modules linked in: [ 28.524613] CPU: 0 PID: 3328 Comm: syzkaller134216 Not tainted 4.4.107-g610c835 #4 [ 28.532281] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.541610] task: ffff8801d1b38000 task.stack: ffff8800b3c78000 [ 28.547631] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 28.555858] RSP: 0018:ffff8800b3c7fa40 EFLAGS: 00010a07 [ 28.561273] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 28.568506] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 28.575742] RBP: ffff8800b3c7fa50 R08: 0000000000000001 R09: 0000000000000000 [ 28.582981] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 28.590225] R13: 0000000000000020 R14: ffff8800b4cec200 R15: dffffc0000000000 [ 28.597464] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000956e840 [ 28.605652] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.611500] CR2: 0000000020001000 CR3: 00000000b4443000 CR4: 00000000001406f0 [ 28.618736] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.625975] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.633208] Stack: [ 28.635321] 0000000000000000 ffff8800b4cec358 ffff8800b3c7fab0 ffffffff825b8cf1 [ 28.643273] ffff8800b4cec370 ffffed001699d86b ffffed001699d86e ffff8800b4cec368 [ 28.651225] dead4ead00000000 ffff8800b4cec340 0000000000000000 0000000000000000 [ 28.659176] Call Trace: [ 28.661734] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 28.668193] [] sg_finish_rem_req+0x2b5/0x340 [ 28.674215] [] sg_new_read.isra.18+0x39/0x3c0 [ 28.680323] [] ? sg_get_rq_mark+0x142/0x190 [ 28.686264] [] sg_read+0x8c2/0x1490 [ 28.691517] [] ? save_stack_trace+0x26/0x50 [ 28.697451] [] ? save_stack+0x43/0xd0 [ 28.702876] [] ? kasan_slab_free+0x72/0xc0 [ 28.708725] [] ? kmem_cache_free+0xc7/0x320 [ 28.714664] [] ? putname+0xee/0x130 [ 28.719904] [] ? compat_SyS_open+0x2a/0x40 [ 28.725752] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.732381] [] ? debug_check_no_obj_freed+0x166/0x9b0 [ 28.739194] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 28.746084] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.752715] [] __vfs_read+0x103/0x440 [ 28.758127] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 28.765018] [] ? vfs_iter_write+0x2d0/0x2d0 [ 28.770954] [] ? fsnotify+0x5ad/0xee0 [ 28.776366] [] ? fsnotify+0xee0/0xee0 [ 28.781791] [] ? avc_policy_seqno+0x9/0x20 [ 28.787642] [] ? selinux_file_permission+0x348/0x460 [ 28.794358] [] ? security_file_permission+0x89/0x1e0 [ 28.801076] [] ? rw_verify_area+0x100/0x2f0 [ 28.807028] [] vfs_read+0x123/0x3a0 [ 28.812402] [] SyS_read+0xd9/0x1b0 [ 28.817569] [] ? do_sendfile+0xd30/0xd30 [ 28.823247] [] ? vmacache_update+0xfe/0x130 [ 28.829184] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.835380] [] ? do_sendfile+0xd30/0xd30 [ 28.841055] [] do_fast_syscall_32+0x314/0x890 [ 28.847165] [] sysenter_flags_fixed+0xd/0x17 [ 28.853186] 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 [ 28.879464] RIP [] __free_pages+0x21/0x90 [ 28.885344] RSP [ 28.889167] ---[ end trace b4618059004a5c5a ]--- [ 28.893922] Kernel panic - not syncing: Fatal exception [ 28.899721] Dumping ftrace buffer: [ 28.903235] (ftrace buffer empty) [ 28.906912] Kernel Offset: disabled [ 28.910506] Rebooting in 86400 seconds..