bisecting fixing commit since f56f3d0e65adb447b8b583c8ed4fbbe544c9bfde
building syzkaller on 8098ea0f3397d5db00e4852b1b29d0958f2189c6
testing commit f56f3d0e65adb447b8b583c8ed4fbbe544c9bfde with gcc (GCC) 8.1.0
kernel signature: 1f2fdbcdfd44600bc6bd40df62e57310e18b04cd
all runs: crashed: KASAN: slab-out-of-bounds Read in bpf_clone_redirect
testing current HEAD e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b
testing commit e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b with gcc (GCC) 8.1.0
kernel signature: 2442518e6061431601eaf541a1e41384ce21cdf1
all runs: crashed: KASAN: slab-out-of-bounds Read in bpf_clone_redirect
revisions tested: 2, total time: 23m12.508366192s (build: 16m17.219580316s, test: 5m59.624623953s)
the crash still happens on HEAD
commit msg: Linux 4.14.160
crash: KASAN: slab-out-of-bounds Read in bpf_clone_redirect
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
==================================================================
BUG: KASAN: slab-out-of-bounds in ____bpf_clone_redirect net/core/filter.c:1768 [inline]
BUG: KASAN: slab-out-of-bounds in bpf_clone_redirect+0x27b/0x2b0 net/core/filter.c:1759
Read of size 8 at addr ffff88809159b3d0 by task syz-executor.1/6826

CPU: 0 PID: 6826 Comm: syz-executor.1 Not tainted 4.14.160-syzkaller #0
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+0xf7/0x13b lib/dump_stack.c:58
 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:409
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 ____bpf_clone_redirect net/core/filter.c:1768 [inline]
 bpf_clone_redirect+0x27b/0x2b0 net/core/filter.c:1759
 bpf_prog_3c8dfff8b3098609+0x748/0x1000

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809159b340
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 144 bytes inside of
 232-byte region [ffff88809159b340, ffff88809159b428)
The buggy address belongs to the page:
page:ffffea00024566c0 count:1 mapcount:0 mapping:ffff88809159b0c0 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff88809159b0c0 0000000000000000 000000010000000c
raw: ffffea00023fc6e0 ffff8880a9e13c48 ffff88821b75e540 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809159b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809159b300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809159b380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff88809159b400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809159b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================