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BUG: KASAN: use-after-free in ext4_xattr_set_entry+0x35de/0x3770 fs/ext4/xattr.c:1600
Read of size 4 at addr ffff88808b76b099 by task syz-executor.2/2261

CPU: 1 PID: 2261 Comm: syz-executor.2 Not tainted 5.3.0+ #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+0x172/0x1f0 lib/dump_stack.c:113
 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
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131
 ext4_xattr_set_entry+0x35de/0x3770 fs/ext4/xattr.c:1600
 ext4_xattr_ibody_set+0x80/0x2d0 fs/ext4/xattr.c:2236
 ext4_xattr_set_handle+0x821/0x1090 fs/ext4/xattr.c:2392
 ext4_initxattrs+0xc0/0x130 fs/ext4/xattr_security.c:43
 security_inode_init_security security/security.c:996 [inline]
 security_inode_init_security+0x2c8/0x3b0 security/security.c:969
 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:57
 __ext4_new_inode+0x4235/0x4ee0 fs/ext4/ialloc.c:1160
 ext4_symlink+0x45a/0xf10 fs/ext4/namei.c:3262
 vfs_symlink fs/namei.c:4119 [inline]
 vfs_symlink+0x373/0x5a0 fs/namei.c:4105
 do_symlinkat+0x22b/0x290 fs/namei.c:4146
 __do_sys_symlink fs/namei.c:4165 [inline]
 __se_sys_symlink fs/namei.c:4163 [inline]
 __x64_sys_symlink+0x59/0x80 fs/namei.c:4163
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459757
Code: 0f 1f 00 b8 5c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 9d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffcf8876978 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000459757
RDX: 00007ffcf8876a13 RSI: 00000000004bf286 RDI: 00007ffcf8876a00
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000001
R13: 00007ffcf88769b0 R14: 0000000000000000 R15: 00007ffcf88769c0

The buggy address belongs to the page:
page:ffffea00022ddac0 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1
flags: 0x1fffc0000000000()
raw: 01fffc0000000000 ffffea0001f11888 ffffea0000274388 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808b76af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808b76b000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88808b76b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                            ^
 ffff88808b76b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808b76b180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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