[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.222568] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.635087] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.903268] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.815990] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) [ 21.985598] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) Warning: Permanently added '10.128.15.213' (ECDSA) to the list of known hosts. [ 27.360833] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available) executing program [ 27.462131] ================================================================== [ 27.469517] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x270e/0x3490 [ 27.476078] Read of size 6144 at addr ffff8801d5546018 by task syzkaller528407/3319 [ 27.483846] [ 27.485447] CPU: 1 PID: 3319 Comm: syzkaller528407 Not tainted 4.4.110-gdac1439 #13 [ 27.493209] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.502533] 0000000000000000 563e92c7228dd3f5 ffff8801d01e76f8 ffffffff81d04e3d [ 27.510488] ffffea0007555180 ffff8801d5546018 0000000000000000 ffff8801d5546200 [ 27.518436] ffff8801d01e7938 ffff8801d01e7730 ffffffff814fd1f3 ffff8801d5546018 [ 27.526383] Call Trace: [ 27.528946] [] dump_stack+0xc1/0x124 [ 27.534281] [] print_address_description+0x73/0x260 [ 27.540909] [] kasan_report+0x285/0x370 [ 27.546499] [] ? pfkey_add+0x270e/0x3490 [ 27.552735] [] check_memory_region+0x137/0x190 [ 27.558940] [] memcpy+0x23/0x50 [ 27.563837] [] pfkey_add+0x270e/0x3490 [ 27.569343] [] ? pfkey_delete+0x370/0x370 [ 27.575109] [] ? pfkey_add+0x3490/0x3490 [ 27.580785] [] ? __skb_clone+0x24a/0x7d0 [ 27.586547] [] ? pfkey_delete+0x370/0x370 [ 27.592310] [] pfkey_process+0x61e/0x730 [ 27.597985] [] ? pfkey_send_new_mapping+0x11b0/0x11b0 [ 27.604791] [] pfkey_sendmsg+0x3a9/0x760 [ 27.610465] [] ? pfkey_spdget+0x820/0x820 [ 27.616228] [] sock_sendmsg+0xca/0x110 [ 27.621729] [] ___sys_sendmsg+0x6c1/0x7c0 [ 27.627494] [] ? copy_msghdr_from_user+0x550/0x550 [ 27.634042] [] ? __schedule+0xa9d/0x1c70 [ 27.639722] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 27.646266] [] ? __lock_is_held+0xa1/0xf0 [ 27.652031] [] ? check_preemption_disabled+0x3b/0x200 [ 27.658835] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 27.665814] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 27.672533] [] ? __fget_light+0xa1/0x1e0 [ 27.678204] [] ? __fdget+0x18/0x20 [ 27.683359] [] ? sockfd_lookup_light+0x118/0x160 [ 27.689745] [] __sys_sendmsg+0xd3/0x190 [ 27.695340] [] ? SyS_shutdown+0x1b0/0x1b0 [ 27.701103] [] ? __do_page_fault+0x380/0xa00 [ 27.707127] [] compat_SyS_sendmsg+0x2a/0x40 [ 27.713060] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 27.719613] [] do_fast_syscall_32+0x314/0x890 [ 27.725725] [] sysenter_flags_fixed+0xd/0x17 [ 27.731745] [ 27.733344] Allocated by task 3319: [ 27.736948] [] save_stack_trace+0x26/0x50 [ 27.742829] [] save_stack+0x43/0xd0 [ 27.748182] [] kasan_kmalloc+0xad/0xe0 [ 27.753794] [] kasan_krealloc+0x64/0x80 [ 27.759490] [] ksize+0x92/0xf0 [ 27.764408] [] __alloc_skb+0x132/0x600 [ 27.770028] [] pfkey_sendmsg+0x135/0x760 [ 27.775834] [] sock_sendmsg+0xca/0x110 [ 27.781451] [] ___sys_sendmsg+0x6c1/0x7c0 [ 27.787325] [] __sys_sendmsg+0xd3/0x190 [ 27.793024] [] compat_SyS_sendmsg+0x2a/0x40 [ 27.799083] [] do_fast_syscall_32+0x314/0x890 [ 27.805310] [] sysenter_flags_fixed+0xd/0x17 [ 27.811457] [ 27.813051] Freed by task 0: [ 27.816039] (stack is not available) [ 27.819715] [ 27.821308] The buggy address belongs to the object at ffff8801d5546000 [ 27.821308] which belongs to the cache kmalloc-512 of size 512 [ 27.833932] The buggy address is located 24 bytes inside of [ 27.833932] 512-byte region [ffff8801d5546000, ffff8801d5546200) [ 27.845680] The buggy address belongs to the page: [ 29.262550] PANIC: double fault, error_code: 0x0 [ 29.267323] CPU: 1 PID: 3319 Comm: syzkaller528407 Not tainted 4.4.110-gdac1439 #13 [ 29.275080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.284400] task: ffff8800b54ddf00 task.stack: ffff8801d01e0000 [ 29.290424] RIP: 0010:[] [] dump_page_badflags+0xd/0x250 [ 29.299170] RSP: 0018:ffff880100000000 EFLAGS: 00010046 [ 29.304584] RAX: ffff8800b54ddf00 RBX: ffffea0007555180 RCX: ffffffff8148f740 [ 29.311818] RDX: 0000000000000000 RSI: ffffffff838a8320 RDI: ffffea0007555180 [ 29.319053] RBP: ffff880100000018 R08: 0000000000000001 R09: 0000000000000000 [ 29.326288] R10: 0000000000000002 R11: fffffbfff0ad781e R12: 0000000000000000 [ 29.333522] R13: ffffffff838a8320 R14: 0000000000000000 R15: 0000000000000000 [ 29.341625] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008cbf840 [ 29.349815] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.355667] CR2: ffff8800fffffff8 CR3: 00000001d22e0000 CR4: 0000000000160670 [ 29.362911] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.370149] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.377382] Stack: [ 29.379493] [ 29.381082] Call Trace: [ 29.383630] [ 29.385657] Code: ff e8 a8 e2 06 00 e9 50 fd ff ff e8 9e e2 06 00 e9 1d fd ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 <41> 54 49 89 d4 53 48 89 fb 48 83 ec 08 e8 61 06 ed ff 48 8d 7b [ 29.412280] Kernel panic - not syncing: Machine halted. [ 29.417609] CPU: 1 PID: 3319 Comm: syzkaller528407 Not tainted 4.4.110-gdac1439 #13 [ 29.425364] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.434689] 0000000000000000 563e92c7228dd3f5 ffff8801db30ce38 ffffffff81d04e3d [ 29.442631] ffffffff838367c0 ffff8801db30cf10 ffffffff83808040 ffff880100000000 [ 29.450586] 0000000000000000 ffff8801db30cf00 ffffffff814197fa 0000000041b58ab3 [ 29.458534] Call Trace: [ 29.461080] <#DF> [] dump_stack+0xc1/0x124 [ 29.467137] [] panic+0x1aa/0x388 [ 29.472123] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 29.479024] [] ? vprintk_emit+0x242/0x850 [ 29.484804] [] ? dump_page_badflags+0x22/0x250 [ 29.491000] [] ? vprintk_emit+0x242/0x850 [ 29.496768] [] df_debug+0x2d/0x30 [ 29.501843] [] do_double_fault+0x10b/0x210 [ 29.507691] [] double_fault+0x2d/0x40 [ 29.513119] [] ? dump_page_badflags+0x180/0x250 [ 29.519401] [] ? dump_page_badflags+0xd/0x250 [ 29.525515] <> [ 29.528964] Dumping ftrace buffer: [ 29.532792] (ftrace buffer empty) [ 29.536466] Kernel Offset: disabled [ 29.540069] Rebooting in 86400 seconds..