Commit 9f69dfc4e275 ("fuse2fs: implement O_APPEND correctly") defined
a new flag, A_OK, to add support for testing whether the file is valid
for append operations. This is relevant for the check_iflags_access()
function, but when are later testing operations mask against the inode
permissions, this new flag gets in the way and causes non-root users
attempting to create new inodes in a directory to fail. Fix this by
masking off A_OK before doing these tests.
Fixes: 9f69dfc4e275 ("fuse2fs: implement O_APPEND correctly")
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
---
misc/fuse2fs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index bb75d9421..d209bc790 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -687,6 +687,9 @@ static int check_inum_access(struct fuse2fs *ff, ext2_ino_t ino, int mask)
return -EACCES;
}
+ /* Remove the O_APPEND flag before testing permissions */
+ mask &= ~A_OK;
+
/* allow owner, if perms match */
if (inode_uid(inode) == ctxt->uid) {
if ((mask & (perms >> 6)) == mask)
--
2.47.2
