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| author |   Chengguang Xu <cgxu519@gmx.com> | 2018-08-30 21:33:31 +0800 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-05 13:40:31 -0700 |
| commit | 1618e6e297082def6350887e1c6c606749716fac (patch) | |
| tree | 7e533c0fffd3b552aadae0cf02cbc7385a1cb503 /fs/f2fs/acl.c | |
| parent | Merge tag 'gpio-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio (diff) | |
| download | linux-dev-1618e6e297082def6350887e1c6c606749716fac.tar.xz linux-dev-1618e6e297082def6350887e1c6c606749716fac.zip | |
f2fs: add additional sanity check in f2fs_acl_from_disk()
Add additinal sanity check for irregular case(e.g. corruption).
If size of extended attribution is smaller than size of acl header,
then return -EINVAL.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/acl.c')
| -rw-r--r-- | fs/f2fs/acl.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c index 111824199a88..20caf341701d 100644 --- a/fs/f2fs/acl.c +++ b/fs/f2fs/acl.c @@ -53,6 +53,9 @@ static struct posix_acl *f2fs_acl_from_disk(const char *value, size_t size) struct f2fs_acl_entry *entry = (struct f2fs_acl_entry *)(hdr + 1); const char *end = value + size; + if (size < sizeof(struct f2fs_acl_header)) + return ERR_PTR(-EINVAL); + if (hdr->a_version != cpu_to_le32(F2FS_ACL_VERSION)) return ERR_PTR(-EINVAL); |