device veth0_vlan left promiscuous mode
EXT4-fs error: 1 callbacks suppressed
EXT4-fs error (device sda1): ext4_xattr_ibody_get:591: inode #16510: comm syz-fuzzer: corrupted in-inode xattr
EXT4-fs error (device sda1): ext4_xattr_ibody_get:591: inode #16511: comm syz-fuzzer: corrupted in-inode xattr
==================================================================
BUG: KASAN: use-after-free in memmove include/linux/string.h:363 [inline]
BUG: KASAN: use-after-free in ext4_xattr_set_entry+0xb17/0x3340 fs/ext4/xattr.c:1738
Read of size 4 at addr ffff88804e080ffe by task syz-fuzzer/6449

CPU: 1 PID: 6449 Comm: syz-fuzzer Not tainted 4.19.128-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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x222 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 memmove+0x20/0x50 mm/kasan/kasan.c:293
 memmove include/linux/string.h:363 [inline]
 ext4_xattr_set_entry+0xb17/0x3340 fs/ext4/xattr.c:1738
 ext4_xattr_ibody_set+0x81/0x2a0 fs/ext4/xattr.c:2240
 ext4_xattr_set_handle+0x5d2/0x1010 fs/ext4/xattr.c:2396
 ext4_initxattrs+0xb5/0x120 fs/ext4/xattr_security.c:43
 security_inode_init_security security/security.c:498 [inline]
 security_inode_init_security+0x294/0x370 security/security.c:471
 __ext4_new_inode+0x3ec5/0x5af0 fs/ext4/ialloc.c:1165
 ext4_mkdir+0x396/0xd90 fs/ext4/namei.c:2656
 vfs_mkdir+0x423/0x6a0 fs/namei.c:3819
 do_mkdirat+0x21e/0x280 fs/namei.c:3842
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4b3cdb
Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 bb a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c0004a7348 EFLAGS: 00000212 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb
RDX: 00000000000001c0 RSI: 000000c01a750960 RDI: ffffffffffffff9c
RBP: 000000c0004a73a0 R08: 000000000086f901 R09: 0000000000000001
R10: 000000c01a750960 R11: 0000000000000212 R12: ffffffffffffffff
R13: 000000000000004c R14: 000000000000004b R15: 0000000000000100

The buggy address belongs to the page:
page:ffffea0001382000 count:2 mapcount:0 mapping:ffff8880a31a2520 index:0x429
flags: 0xfffe0000001074(referenced|dirty|lru|active|private)
raw: 00fffe0000001074 ffffea00015d6408 ffffea0000f71bc8 ffff8880a31a2520
raw: 0000000000000429 ffff88804cd3e540 00000002ffffffff ffff88821b6eeb00
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff88821b6eeb00

Memory state around the buggy address:
 ffff88804e080f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804e080f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88804e081000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88804e081080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88804e081100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================