From: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Tue, 26 Sep 2023 08:19:08 +0000 (+0300)
Subject: fs/ntfs3: Fix possible NULL-ptr-deref in ni_readpage_cmpr()
X-Git-Tag: v5.15.138~40
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2de328398b50380295448181f4a06bf879ec748e;p=thirdparty%2Fkernel%2Fstable.git

fs/ntfs3: Fix possible NULL-ptr-deref in ni_readpage_cmpr()

[ Upstream commit 32e9212256b88f35466642f9c939bb40cfb2c2de ]

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 73a56d7ac84b7..b02778cbb1d34 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -2100,7 +2100,7 @@ out1:
 
 	for (i = 0; i < pages_per_frame; i++) {
 		pg = pages[i];
-		if (i == idx)
+		if (i == idx || !pg)
 			continue;
 		unlock_page(pg);
 		put_page(pg);