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| author | Eric Biggers <ebiggers@google.com> | 2021-07-02 09:53:48 +0300 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2021-07-26 06:01:06 +0300 |
| commit | 461b43a8f92e68e96c4424b31e15f2b35f1bbfa9 (patch) | |
| tree | 8fa4348c3ea7545b7ec93da5889b4285010e6c53 /fs | |
| parent | 8c4bca10ceafc43b1ca0a9fab5fa27e13cbce99e (diff) | |
| download | linux-461b43a8f92e68e96c4424b31e15f2b35f1bbfa9.tar.xz | |
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')
| -rw-r--r-- | fs/f2fs/namei.c | 12 |
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, }; |