linux-kernel - [PATCH] fs: smb: client: Add missing check for kstrdup()

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Date: Mon,  1 Jul 2024 14:48:47 +0800
From: Haoxiang Li <make24@...as.ac.cn>
To: sfrench@...ba.org,
	pc@...guebit.com,
	ronniesahlberg@...il.com,
	sprasad@...rosoft.com,
	tom@...pey.com,
	bharathsm@...rosoft.com
Cc: linux-cifs@...r.kernel.org,
	samba-technical@...ts.samba.org,
	linux-kernel@...r.kernel.org,
	Haoxiang Li <make24@...as.ac.cn>
Subject: [PATCH] fs: smb: client: Add missing check for kstrdup()

Add check for kstrdup() in smb3_reconfigure in order to guarantee
the success of allocation.

Fixes: c1eb537bf456 ("cifs: allow changing password during remount")
Signed-off-by: Haoxiang Li <make24@...as.ac.cn>
---
 fs/smb/client/fs_context.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
index 3bbac925d076..8253b615b8ce 100644
--- a/fs/smb/client/fs_context.c
+++ b/fs/smb/client/fs_context.c
@@ -920,6 +920,8 @@ static int smb3_reconfigure(struct fs_context *fc)
 		ses->password = kstrdup(ctx->password, GFP_KERNEL);
 		kfree_sensitive(ses->password2);
 		ses->password2 = kstrdup(ctx->password2, GFP_KERNEL);
+		if (!ses->password || !ses->password2)
+			return ERR_PTR(rc);
 	}
 	STEAL_STRING(cifs_sb, ctx, domainname);
 	STEAL_STRING(cifs_sb, ctx, nodename);
-- 
2.25.1