3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Weston Andros Adamson <[email protected]> commit bbd3a8eee82a2a6f4aa1cce60ccb014f25e5c560 upstream. Don't check MAY_WRITE as a newly created file may not have write mode bits, but POSIX allows the creating process to write regardless. This is ok because NFSv4 OPEN ops handle write permissions correctly - the ACCESS in the OPEN compound is to differentiate READ v EXEC permissions. Fixes a regression due to commit 6168f62c (NFSv4: Add ACCESS operation to OPEN compound) Signed-off-by: Weston Andros Adamson <[email protected]> Signed-off-by: Trond Myklebust <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> --- fs/nfs/nfs4proc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 1e0faf9..ccada68 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1661,10 +1661,10 @@ static int nfs4_opendata_access(struct rpc_cred *cred, return 0; mask = 0; + /* don't check MAY_WRITE - a newly created file may not have + * write mode bits, but POSIX allows the creating process to write */ if (fmode & FMODE_READ) mask |= MAY_READ; - if (fmode & FMODE_WRITE) - mask |= MAY_WRITE; if (fmode & FMODE_EXEC) mask |= MAY_EXEC; @@ -1673,7 +1673,7 @@ static int nfs4_opendata_access(struct rpc_cred *cred, nfs_access_set_mask(&cache, opendata->o_res.access_result); nfs_access_add_cache(state->inode, &cache); - if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0) + if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) return 0; /* even though OPEN succeeded, access is denied. Close the file */ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
