==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:378 [inline]
BUG: KASAN: slab-out-of-bounds in bpf_prog_create+0xe9/0x250 net/core/filter.c:1351
Read of size 64 at addr ffff88809a3b4a80 by task syz-executor.5/11073

CPU: 0 PID: 11073 Comm: syz-executor.5 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:634
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
 memcpy+0x24/0x50 mm/kasan/common.c:122
 memcpy include/linux/string.h:378 [inline]
 bpf_prog_create+0xe9/0x250 net/core/filter.c:1351
 get_filter.isra.0+0x108/0x1a0 drivers/net/ppp/ppp_generic.c:572
 compat_ppp_get_filter drivers/net/ppp/ppp_generic.c:605 [inline]
 ppp_compat_ioctl+0x298/0x42b drivers/net/ppp/ppp_generic.c:867
 __do_compat_sys_ioctl fs/compat_ioctl.c:202 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:142 [inline]
 __ia32_compat_sys_ioctl+0x22d/0x5c0 fs/compat_ioctl.c:142
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fc2a39
Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5dbe0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000040087446
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 11073:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524
 __do_kmalloc mm/slab.c:3655 [inline]
 __kmalloc_track_caller+0x15f/0x760 mm/slab.c:3670
 memdup_user+0x26/0xb0 mm/util.c:172
 get_filter.isra.0+0xd7/0x1a0 drivers/net/ppp/ppp_generic.c:568
 compat_ppp_get_filter drivers/net/ppp/ppp_generic.c:605 [inline]
 ppp_compat_ioctl+0x298/0x42b drivers/net/ppp/ppp_generic.c:867
 __do_compat_sys_ioctl fs/compat_ioctl.c:202 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:142 [inline]
 __ia32_compat_sys_ioctl+0x22d/0x5c0 fs/compat_ioctl.c:142
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 9022:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:471
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480
 __cache_free mm/slab.c:3425 [inline]
 kfree+0x10a/0x2c0 mm/slab.c:3756
 tomoyo_path2_perm+0x2b3/0x670 security/tomoyo/file.c:947
 tomoyo_path_rename+0xee/0x150 security/tomoyo/tomoyo.c:285
 security_path_rename+0x20c/0x300 security/security.c:1079
 do_renameat2+0x7b8/0xc40 fs/namei.c:4619
 __do_sys_rename fs/namei.c:4669 [inline]
 __se_sys_rename fs/namei.c:4667 [inline]
 __x64_sys_rename+0x61/0x80 fs/namei.c:4667
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809a3b4a80
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff88809a3b4a80, ffff88809a3b4aa0)
The buggy address belongs to the page:
page:ffffea000268ed00 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809a3b4fc1
raw: 00fffe0000000200 ffffea00024a7288 ffffea000266fbc8 ffff8880aa4001c0
raw: ffff88809a3b4fc1 ffff88809a3b4000 0000000100000030 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809a3b4980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809a3b4a00: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc
>ffff88809a3b4a80: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
                      ^
 ffff88809a3b4b00: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809a3b4b80: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc
==================================================================