nfs_open_permission_mask() should only check MAY_EXEC for files that
are opened with __FMODE_EXEC.
Also fix NFSv4 access-in-open path in a similar way -- openflags must be
used because fmode will not always have FMODE_EXEC set.
Signed-off-by: Weston Andros Adamson <[email protected]>
---
This patch fixes https://bugzilla.kernel.org/show_bug.cgi?id=49101
Patch v2 - apply Trond's comment: only check MAY_EXEC when openflags has
__FMODE_EXEC.
fs/nfs/dir.c | 16 ++++++++++------
fs/nfs/nfs4proc.c | 18 ++++++++++++------
2 files changed, 22 insertions(+), 12 deletions(-)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 32e6c53..1b2d7eb 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -2153,12 +2153,16 @@ static int nfs_open_permission_mask(int openflags)
{
int mask = 0;
- if ((openflags & O_ACCMODE) != O_WRONLY)
- mask |= MAY_READ;
- if ((openflags & O_ACCMODE) != O_RDONLY)
- mask |= MAY_WRITE;
- if (openflags & __FMODE_EXEC)
- mask |= MAY_EXEC;
+ if (openflags & __FMODE_EXEC) {
+ /* ONLY check exec rights */
+ mask = MAY_EXEC;
+ } else {
+ if ((openflags & O_ACCMODE) != O_WRONLY)
+ mask |= MAY_READ;
+ if ((openflags & O_ACCMODE) != O_RDONLY)
+ mask |= MAY_WRITE;
+ }
+
return mask;
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5d864fb..3b70588 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1626,7 +1626,8 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
static int nfs4_opendata_access(struct rpc_cred *cred,
struct nfs4_opendata *opendata,
- struct nfs4_state *state, fmode_t fmode)
+ struct nfs4_state *state, fmode_t fmode,
+ int openflags)
{
struct nfs_access_entry cache;
u32 mask;
@@ -1637,12 +1638,17 @@ static int nfs4_opendata_access(struct rpc_cred *cred,
return 0;
mask = 0;
+
+ /* use openflags to check for exec, because fmode won't
+ * always have FMODE_EXEC set when file open for exec. */
+ if (openflags & __FMODE_EXEC)
+ /* ONLY check for exec rights */
+ mask = MAY_EXEC;
+
/* 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_EXEC)
- mask |= MAY_EXEC;
+ else if (fmode & FMODE_READ)
+ mask = MAY_READ;
cache.cred = cred;
cache.jiffies = jiffies;
@@ -1896,7 +1902,7 @@ static int _nfs4_do_open(struct inode *dir,
if (server->caps & NFS_CAP_POSIX_LOCK)
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
- status = nfs4_opendata_access(cred, opendata, state, fmode);
+ status = nfs4_opendata_access(cred, opendata, state, fmode, flags);
if (status != 0)
goto err_opendata_put;
--
1.7.9.6 (Apple Git-31.1)