linux-ext4 - [PATCH 10/27] e2fsck: fix infinite loop when recovering corrupt journal blocks

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: <20140816234655.11171.49022.stgit@birch.djwong.org>
Date:	Sat, 16 Aug 2014 16:46:55 -0700
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	tytso@....edu, darrick.wong@...cle.com
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH 10/27] e2fsck: fix infinite loop when recovering corrupt
 journal blocks

When recovering the journal, don't fall into an infinite loop if we
encounter a corrupt journal block.  Instead, just skip the block and
proceed with the full filesystem fsck.

The test case for this will be "j_corrupt_journal_block" further on
in the patch series.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 e2fsck/recovery.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/e2fsck/recovery.c b/e2fsck/recovery.c
index e4c7519..0e194be 100644
--- a/e2fsck/recovery.c
+++ b/e2fsck/recovery.c
@@ -426,6 +426,7 @@ static int do_one_pass(journal_t *journal,
 	int			tag_bytes = journal_tag_bytes(journal);
 	__u32			crc32_sum = ~0; /* Transactional Checksums */
 	int			descr_csum_size = 0;
+	int			block_error = 0;

 	/*
 	 * First thing is to establish what we expect to find in the log
@@ -598,7 +599,8 @@ static int do_one_pass(journal_t *journal,
 						       "checksum recovering "
 						       "block %llu in log\n",
 						       blocknr);
-						continue;
+						block_error = 1;
+						goto skip_write;
 					}

 					/* Find a buffer for the new
@@ -797,7 +799,8 @@ static int do_one_pass(journal_t *journal,
 				success = -EIO;
 		}
 	}
-
+	if (block_error && success == 0)
+		success = -EIO;
 	return success;

  failed:

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html