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authorEric Biggers <ebiggers@google.com>2021-07-01 23:53:48 -0700
committerEric Biggers <ebiggers@google.com>2021-07-25 20:01:06 -0700
commit461b43a8f92e68e96c4424b31e15f2b35f1bbfa9 (patch)
tree8fa4348c3ea7545b7ec93da5889b4285010e6c53 /fs/f2fs/namei.c
parent8c4bca10ceafc43b1ca0a9fab5fa27e13cbce99e (diff)
f2fs: report correct st_size for encrypted symlinks
The stat() family of syscalls report the wrong size for encrypted symlinks, which has caused breakage in several userspace programs. Fix this by calling fscrypt_symlink_getattr() after f2fs_getattr() for encrypted symlinks. This function computes the correct size by reading and decrypting the symlink target (if it's not already cached). For more details, see the commit which added fscrypt_symlink_getattr(). Fixes: cbaf042a3cc6 ("f2fs crypto: add symlink encryption") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210702065350.209646-4-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/f2fs/namei.c')
-rw-r--r--fs/f2fs/namei.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index e149c8c66a71..9c528e583c9d 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1323,9 +1323,19 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
return target;
}
+static int f2fs_encrypted_symlink_getattr(struct user_namespace *mnt_userns,
+ const struct path *path,
+ struct kstat *stat, u32 request_mask,
+ unsigned int query_flags)
+{
+ f2fs_getattr(mnt_userns, path, stat, request_mask, query_flags);
+
+ return fscrypt_symlink_getattr(path, stat);
+}
+
const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
.get_link = f2fs_encrypted_get_link,
- .getattr = f2fs_getattr,
+ .getattr = f2fs_encrypted_symlink_getattr,
.setattr = f2fs_setattr,
.listxattr = f2fs_listxattr,
};