@@ -580,7 +580,7 @@ errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
io_channel io;
int length = EXT2_INODE_SIZE(fs->super);
struct ext2_inode_large *iptr;
- int cache_slot;
+ int cache_slot, fail_csum;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
@@ -658,8 +658,8 @@ errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
length = EXT2_INODE_SIZE(fs->super);
/* Verify the inode checksum. */
- if (!(fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
- !ext2fs_inode_csum_verify(fs, ino, iptr))
+ fail_csum = !ext2fs_inode_csum_verify(fs, ino, iptr);
+ if (!(fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) && fail_csum)
return EXT2_ET_INODE_CSUM_INVALID;
#ifdef WORDS_BIGENDIAN
@@ -669,8 +669,10 @@ errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
#endif
/* Update the inode cache bookkeeping */
- fs->icache->cache_last = cache_slot;
- fs->icache->cache[cache_slot].ino = ino;
+ if (!fail_csum) {
+ fs->icache->cache_last = cache_slot;
+ fs->icache->cache[cache_slot].ino = ino;
+ }
memcpy(inode, iptr, (bufsize > length) ? length : bufsize);
return 0;
new file mode 100644
@@ -0,0 +1,12 @@
+Pass 1: Checking inodes, blocks, and sizes
+Inode 12 checksum does not match inode. Running sanity checks.
+Inode 12 passes checks, but checksum does not match inode. Fix? yes
+
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 12/128 files (0.0% non-contiguous), 19/512 blocks
+Exit status is 1
new file mode 100644
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 12/128 files (0.0% non-contiguous), 19/512 blocks
+Exit status is 0
new file mode 100644
GIT binary patch
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new file mode 100644
@@ -0,0 +1 @@
+don't cache inodes that fail checksum verification
If an inode fails checksum verification, don't stuff a copy of it in the inode cache, because this can cause the library to fail to return the "corrupt inode" error code. In general, this happens if ext2fs_read_inode_full() is called twice on an inode with an incorrect checksum. If fs->flags has EXT2_FLAG_IGNORE_CSUM_ERRORS set during the first call and *unset* during the second call, the cache hit during the second call fails to return EXT2_ET_INODE_CSUM_INVALID as you'd expect. This happens during fsck if strict_csums is not set, because the first read_inode call happens as part of check_blocks and the second call happens during inode checksum revalidation. A file system with a slightly corrupt non-extent inode will trigger this. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> --- lib/ext2fs/inode.c | 12 +++++++----- tests/f_no_cache_corrupt_inode/expect.1 | 12 ++++++++++++ tests/f_no_cache_corrupt_inode/expect.2 | 7 +++++++ tests/f_no_cache_corrupt_inode/image.gz | Bin tests/f_no_cache_corrupt_inode/name | 1 + 5 files changed, 27 insertions(+), 5 deletions(-) create mode 100644 tests/f_no_cache_corrupt_inode/expect.1 create mode 100644 tests/f_no_cache_corrupt_inode/expect.2 create mode 100644 tests/f_no_cache_corrupt_inode/image.gz create mode 100644 tests/f_no_cache_corrupt_inode/name -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html