linux-kernel - [PATCH 7/8] fs/ntfs3: Fix possible NULL-ptr-deref in ni_readpage

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Message-ID: <a1170a72-0dc1-4092-bb22-7279dcdf3c0a@paragon-software.com>
Date:   Tue, 26 Sep 2023 12:57:13 +0300
From:   Konstantin Komarovc <almaz.alexandrovich@...agon-software.com>
To:     <ntfs3@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>
Subject: [PATCH 7/8] fs/ntfs3: Fix possible NULL-ptr-deref in
 ni_readpage_cmpr()


Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
  fs/ntfs3/frecord.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index d49fbb22bd5e..dad976a68985 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -2148,7 +2148,7 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct 
page *page)

      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);
-- 
2.34.1