==================================================================
BUG: KASAN: use-after-free in memset include/linux/string.h:344 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize+0x1ab/0x290 fs/ext4/inode.c:5948
Write of size 4063 at addr ffff888073e667a0 by task syz-executor.1/13821

CPU: 0 PID: 13821 Comm: syz-executor.1 Not tainted 5.3.0-rc6 #120
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.cold+0xd4/0x306 mm/kasan/report.c:351
 __kasan_report.cold+0x1b/0x36 mm/kasan/report.c:482
 kasan_report+0x12/0x17 mm/kasan/common.c:618
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
 memset+0x24/0x40 mm/kasan/common.c:105
 memset include/linux/string.h:344 [inline]
 __ext4_expand_extra_isize+0x1ab/0x290 fs/ext4/inode.c:5948
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6000 [inline]
 ext4_mark_inode_dirty+0x74e/0x9b0 fs/ext4/inode.c:6076
 ext4_ext_truncate+0x92/0x200 fs/ext4/extents.c:4537
 ext4_truncate+0xc29/0x1370 fs/ext4/inode.c:4546
 ext4_evict_inode+0x9d4/0x14e0 fs/ext4/inode.c:289
 evi