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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: cbaf042a3c
("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>
This commit is contained in:
parent
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@ -1323,9 +1323,19 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
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return target;
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}
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static int f2fs_encrypted_symlink_getattr(struct user_namespace *mnt_userns,
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const struct path *path,
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struct kstat *stat, u32 request_mask,
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unsigned int query_flags)
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{
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f2fs_getattr(mnt_userns, path, stat, request_mask, query_flags);
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return fscrypt_symlink_getattr(path, stat);
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}
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const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
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.get_link = f2fs_encrypted_get_link,
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.getattr = f2fs_getattr,
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.getattr = f2fs_encrypted_symlink_getattr,
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.setattr = f2fs_setattr,
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.listxattr = f2fs_listxattr,
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};
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