random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) audit: type=1400 audit(1565881590.124:36): avc: denied { map } for pid=6929 comm="syz-executor301" path="/root/syz-executor301029181" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: KASAN: slab-out-of-bounds in ____bpf_skb_change_tail net/core/filter.c:2371 [inline] BUG: KASAN: slab-out-of-bounds in bpf_skb_change_tail+0xa7f/0xba0 net/core/filter.c:2368 Read of size 8 at addr ffff88809c1cd510 by task syz-executor301/6929 CPU: 0 PID: 6929 Comm: syz-executor301 Not tainted 4.14.138 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 ____bpf_skb_change_tail net/core/filter.c:2371 [inline] bpf_skb_change_tail+0xa7f/0xba0 net/core/filter.c:2368 bpf_prog_ac477e10ee530e9d+0xe53/0x1000 Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff88809c1cd480 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 144 bytes inside of 232-byte region [ffff88809c1cd480, ffff88809c1cd568) The buggy address belongs to the page: page:ffffea0002707340 count:1 mapcount:0 mapping:ffff88809c1cd0c0 index:0x0 flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffff88809c1cd0c0 0000000000000000 000000010000000c raw: ffffea0002575fe0 ffff8880a9e18748 ffff88821b757240 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809c1cd400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809c1cd480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88809c1cd500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88809c1cd580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809c1cd600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================