* FAILED: patch "[PATCH] f2fs: report correct st_size for encrypted symlinks" failed to apply to 4.14-stable tree
@ 2021-09-01 10:43 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2021-09-01 10:43 UTC (permalink / raw)
To: ebiggers; +Cc: stable
The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 461b43a8f92e68e96c4424b31e15f2b35f1bbfa9 Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers@google.com>
Date: Thu, 1 Jul 2021 23:53:48 -0700
Subject: [PATCH] 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>
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,
};
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2021-09-01 10:43 FAILED: patch "[PATCH] f2fs: report correct st_size for encrypted symlinks" failed to apply to 4.14-stable tree gregkh
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