linux-kernel - [PATCH v3 2/2] NFSv4: check FMODE_EXEC from open context mode in nfs4_opendata

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220923054015.2890271-3-chenxiaosong2@huawei.com>
Date:   Fri, 23 Sep 2022 13:40:15 +0800
From:   ChenXiaoSong <chenxiaosong2@...wei.com>
To:     <trond.myklebust@...merspace.com>, <anna@...nel.org>
CC:     <linux-nfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chenxiaosong2@...wei.com>, <yi.zhang@...wei.com>,
        <zhangxiaoxu5@...wei.com>
Subject: [PATCH v3 2/2] NFSv4: check FMODE_EXEC from open context mode in nfs4_opendata_access()

After converting file f_flags to open context mode by flags_to_mode(), open
context mode will have FMODE_EXEC when file open for exec, so we check
FMODE_EXEC from open context mode.

No functional change, just simplify the code.

Signed-off-by: ChenXiaoSong <chenxiaosong2@...wei.com>
---
 fs/nfs/nfs4proc.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3ed14a2a84a4..806d243f66e8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2624,8 +2624,7 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
  */
 static int nfs4_opendata_access(const struct cred *cred,
 				struct nfs4_opendata *opendata,
-				struct nfs4_state *state, fmode_t fmode,
-				int openflags)
+				struct nfs4_state *state, fmode_t fmode)
 {
 	struct nfs_access_entry cache;
 	u32 mask, flags;
@@ -2636,11 +2635,7 @@ static int nfs4_opendata_access(const struct 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) {
+	if (fmode & FMODE_EXEC) {
 		/* ONLY check for exec rights */
 		if (S_ISDIR(state->inode->i_mode))
 			mask = NFS4_ACCESS_LOOKUP;
@@ -3023,7 +3018,7 @@ static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
 }
 
 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
-		int flags, struct nfs_open_context *ctx)
+		struct nfs_open_context *ctx)
 {
 	struct nfs4_state_owner *sp = opendata->owner;
 	struct nfs_server *server = sp->so_server;
@@ -3084,8 +3079,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
 	/* Parse layoutget results before we check for access */
 	pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
 
-	ret = nfs4_opendata_access(sp->so_cred, opendata, state,
-			acc_mode, flags);
+	ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode);
 	if (ret != 0)
 		goto out;
 
@@ -3159,7 +3153,7 @@ static int _nfs4_do_open(struct inode *dir,
 	if (d_really_is_positive(dentry))
 		opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
 
-	status = _nfs4_open_and_get_state(opendata, flags, ctx);
+	status = _nfs4_open_and_get_state(opendata, ctx);
 	if (status != 0)
 		goto err_opendata_put;
 	state = ctx->state;
-- 
2.31.1