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BUG: KASAN: use-after-free in memcpy include/linux/string.h:377 [inline]
BUG: KASAN: use-after-free in diWrite+0xbf2/0x13c0 fs/jfs/jfs_imap.c:764
Write of size 32 at addr ffff88809e6e4260 by task syz-executor.2/24504

CPU: 1 PID: 24504 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
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]
 diWrite+0xbf2/0x13c0 fs/jfs/jfs_imap.c:764
 txCommit+0x5f8/0x39e0 fs/jfs/jfs_txnmgr.c:1263
 jfs_create.part.0+0x76b/0x880 fs/jfs/namei.c:169
 jfs_create+0x3f/0x60 fs/jfs/namei.c:90
 lookup_open+0x893/0x1a20 fs/namei.c:3235
 do_last fs/namei.c:3327 [inline]
 path_openat+0x1094/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f87124875a9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8710db8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f87125a8120 RCX: 00007f87124875a9
RDX: 0000000000000000 RSI: 0000000000101042 RDI: 0000000020000040
RBP: 00007f87124e2580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc92f99e6f R14: 00007f8710db8300 R15: 0000000000022000

Allocated by task 24014:
 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559
 getname_flags+0xce/0x590 fs/namei.c:140
 do_sys_open+0x26c/0x520 fs/open.c:1079
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 24014:
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x7f/0x260 mm/slab.c:3765
 putname+0xe1/0x120 fs/namei.c:261
 do_sys_open+0x2ba/0x520 fs/open.c:1094
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809e6e4080
 which belongs to the cache names_cache of size 4096
The buggy address is located 480 bytes inside of
 4096-byte region [ffff88809e6e4080, ffff88809e6e5080)
The buggy address belongs to the page:
page:ffffea000279b900 count:1 mapcount:0 mapping:ffff88823b843380 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002cc2288 ffffea0001429788 ffff88823b843380
raw: 0000000000000000 ffff88809e6e4080 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809e6e4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809e6e4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809e6e4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff88809e6e4280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809e6e4300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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