EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:377 [inline]
BUG: KASAN: use-after-free in ext4_write_inline_data+0x300/0x3d0 fs/ext4/inline.c:245
Write of size 70 at addr ffff8880b04b0016 by task syz-executor016/8128

CPU: 1 PID: 8128 Comm: syz-executor016 Not tainted 4.19.193-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/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report+0x8f/0xa0 mm/kasan/report.c:412
 memcpy+0x35/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:377 [inline]
 ext4_write_inline_data+0x300/0x3d0 fs/ext4/inline.c:245
 ext4_write_inline_data_end+0x220/0x640 fs/ext4/inline.c:754
 ext4_write_end+0x1de/0xec0 fs/ext4/inode.c:1423
 ext4_da_write_end+0x860/0xa70 fs/ext4/inode.c:3170
 generic_perform_write+0x2ae/0x4d0 mm/filemap.c:3181
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44a9f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f195b9208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004cc428 RCX: 000000000044a9f9
RDX: 0000000000000082 RSI: 00000000200000c0 RDI: 0000000000000008
RBP: 00000000004cc420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cc42c
R13: 00007ffee825f65f R14: 00007f9f195b9300 R15: 0000000000022000

Allocated by task 28:
 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559
 alloc_pid+0x53/0x8f0 kernel/pid.c:168
 copy_process.part.0+0x3bc0/0x8260 kernel/fork.c:1926
 copy_process kernel/fork.c:1709 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2218
 kernel_thread+0x2f/0x40 kernel/fork.c:2277
 call_usermodehelper_exec_work kernel/umh.c:199 [inline]
 call_usermodehelper_exec_work+0x16d/0x260 kernel/umh.c:185
 process_one_work+0x864/0x1570 kernel/workqueue.c:2152
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2295
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Freed by task 9:
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x7f/0x260 mm/slab.c:3765
 put_pid.part.0+0x109/0x150 kernel/pid.c:111
 put_pid kernel/pid.c:105 [inline]
 delayed_put_pid+0x1c/0x30 kernel/pid.c:120
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881
 __do_softirq+0x265/0x980 kernel/softirq.c:292

The buggy address belongs to the object at ffff8880b04b0000
 which belongs to the cache pid of size 72
The buggy address is located 22 bytes inside of
 72-byte region [ffff8880b04b0000, ffff8880b04b0048)
The buggy address belongs to the page:
page:ffffea0002c12c00 count:1 mapcount:0 mapping:ffff88823b8334c0 index:0xffff8880b04b0f80
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002cbdac8 ffffea0002b77c88 ffff88823b8334c0
raw: ffff8880b04b0f80 ffff8880b04b0000 000000010000000e 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b04aff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880b04aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880b04b0000: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
                         ^
 ffff8880b04b0080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
 ffff8880b04b0100: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
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