diff mbox series

[RFC,6/7] fs/ntfs: support `DISABLE_FS_CSUM_VERIFICATION` config option

Message ID 20221014084837.1787196-7-hrkanabar@gmail.com (mailing list archive)
State New, archived
Headers show
Series fs: Debug config option to disable filesystem checksum verification for fuzzing | expand

Commit Message

Hrutvik Kanabar Oct. 14, 2022, 8:48 a.m. UTC 
From: Hrutvik Kanabar <hrutvik@google.com>

When `DISABLE_FS_CSUM_VERIFICATION` is enabled, bypass checksum
verification in `is_boot_sector_ntfs`.

Signed-off-by: Hrutvik Kanabar <hrutvik@google.com>
---
 fs/ntfs/super.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 001f4e053c85..428c65ce9a80 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -582,7 +582,8 @@  static bool is_boot_sector_ntfs(const struct super_block *sb,
 
 		for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u)
 			i += le32_to_cpup(u);
-		if (le32_to_cpu(b->checksum) != i)
+		if (!IS_ENABLED(CONFIG_DISABLE_FS_CSUM_VERIFICATION) &&
+		    le32_to_cpu(b->checksum) != i)
 			ntfs_warning(sb, "Invalid boot sector checksum.");
 	}
 	/* Check OEMidentifier is "NTFS    " */