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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 192 at addr ffff8880a96f1e80 by task syz-executor.5/10630

CPU: 1 PID: 10630 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
 ppp_get_filter drivers/net/ppp/ppp_generic.c:584 [inline]
 ppp_ioctl+0x12f7/0x2750 drivers/net/ppp/ppp_generic.c:801
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:539 [inline]
 do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:726
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:743
 __do_sys_ioctl fs/ioctl.c:750 [inline]
 __se_sys_ioctl fs/ioctl.c:748 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:748
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe8b02abc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000020000100 RSI: 0000000040107446 RDI: 0000000000000007
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe8b02ac6d4
R13: 00000000004c45dc R14: 00000000004d9b30 R15: 00000000ffffffff

Allocated by task 10630:
 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
 ppp_get_filter drivers/net/ppp/ppp_generic.c:584 [inline]
 ppp_ioctl+0x12f7/0x2750 drivers/net/ppp/ppp_generic.c:801
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:539 [inline]
 do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:726
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:743
 __do_sys_ioctl fs/ioctl.c:750 [inline]
 __se_sys_ioctl fs/ioctl.c:748 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:748
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 6287:
 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
 apparmor_sk_free_security+0x155/0x1d0 security/apparmor/lsm.c:782
 security_sk_free+0x41/0x80 security/security.c:2074
 sk_prot_free net/core/sock.c:1636 [inline]
 __sk_destruct+0x4cd/0x7f0 net/core/sock.c:1724
 sk_destruct+0xd5/0x110 net/core/sock.c:1739
 __sk_free+0xfb/0x360 net/core/sock.c:1750
 sk_free+0x83/0xb0 net/core/sock.c:1761
 sock_put include/net/sock.h:1729 [inline]
 unix_release_sock+0x9cc/0xc80 net/unix/af_unix.c:551
 unix_release+0x44/0x90 net/unix/af_unix.c:842
 __sock_release+0xce/0x280 net/socket.c:592
 sock_close+0x1e/0x30 net/socket.c:1270
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x8e7/0x2ef0 kernel/exit.c:797
 do_group_exit+0x135/0x360 kernel/exit.c:895
 __do_sys_exit_group kernel/exit.c:906 [inline]
 __se_sys_exit_group kernel/exit.c:904 [inline]
 __x64_sys_exit_group+0x44/0x50 kernel/exit.c:904
 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 ffff8880a96f1e80
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff8880a96f1e80, ffff8880a96f1ea0)
The buggy address belongs to the page:
page:ffffea0002a5bc40 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a96f1fc1
raw: 00fffe0000000200 ffffea00028a7588 ffffea0002825d88 ffff8880aa4001c0
raw: ffff8880a96f1fc1 ffff8880a96f1000 0000000100000031 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a96f1d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880a96f1e00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880a96f1e80: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc
                            ^
 ffff8880a96f1f00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880a96f1f80: 05 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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