linux/fs/overlayfs
Kees Cook a77141a063 ovl: Use "buf" flexible array for memcpy() destination
commit cf8aa9bf97 upstream.

The "buf" flexible array needs to be the memcpy() destination to avoid
false positive run-time warning from the recent FORTIFY_SOURCE
hardening:

  memcpy: detected field-spanning write (size 93) of single field "&fh->fb"
  at fs/overlayfs/export.c:799 (size 21)

Reported-by: syzbot+9d14351a171d0d1c7955@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/000000000000763a6c05e95a5985@google.com/
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-09 11:26:47 +01:00
..
copy_up.c ovl: fail on invalid uid/gid mapping at copy up 2023-02-01 08:27:24 +01:00
dir.c ovl: Use ovl mounter's fsuid and fsgid in ovl_link() 2023-01-12 11:58:46 +01:00
export.c ovl: Use "buf" flexible array for memcpy() destination 2023-02-09 11:26:47 +01:00
file.c ovl: remove privs in ovl_fallocate() 2022-12-31 13:14:00 +01:00
inode.c ovl: use ovl_copy_{real,upper}attr() wrappers 2022-12-31 13:14:00 +01:00
Kconfig docs: fix broken references to text files 2020-04-20 15:35:59 -06:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
namei.c ovl: relax lookup error on mismatch origin ftype 2021-08-17 11:47:44 +02:00
overlayfs.h ovl: Use "buf" flexible array for memcpy() destination 2023-02-09 11:26:47 +01:00
ovl_entry.h ovl: store lower path in ovl_inode 2022-12-31 13:14:00 +01:00
readdir.c ovl: skip stale entries in merge dir cache iteration 2021-08-10 10:21:30 +02:00
super.c ovl: fix use inode directly in rcu-walk mode 2022-12-31 13:14:47 +01:00
util.c ovl: use ovl_copy_{real,upper}attr() wrappers 2022-12-31 13:14:00 +01:00