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| author | Arnd Bergmann <arnd@arndb.de> | 2016-01-01 15:21:54 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2016-01-04 10:53:29 +0100 |
| commit | 4f1b1519f7bec44ded3c2c4d46a2594c01446dc8 (patch) | |
| tree | ac4d99781d728a027d8f629354a81e4ae0955901 | |
| parent | udf: Fix lost indirect extent block (diff) | |
| download | linux-4f1b1519f7bec44ded3c2c4d46a2594c01446dc8.tar.xz linux-4f1b1519f7bec44ded3c2c4d46a2594c01446dc8.zip | |
udf: avoid uninitialized variable use
A new warning has come up from a recent cleanup:
fs/udf/inode.c: In function 'udf_setup_indirect_aext':
fs/udf/inode.c:1927:28: warning: 'adsize' may be used uninitialized in this function [-Wmaybe-uninitialized]
If the alloc_type is neither ICBTAG_FLAG_AD_SHORT nor
ICBTAG_FLAG_AD_LONG, the value of adsize is undefined. Currently,
callers of these functions make sure alloc_type is one of the two valid
ones but for future proofing make sure we handle the case of invalid
alloc type as well. This changes the code to return -EIOin that case.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: fcea62babc81 ("udf: Factor out code for creating indirect extent")
Signed-off-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | fs/udf/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 846294891925..91d8fa9d87a4 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -1889,6 +1889,8 @@ int udf_setup_indirect_aext(struct inode *inode, int block, adsize = sizeof(struct short_ad); else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) adsize = sizeof(struct long_ad); + else + return -EIO; neloc.logicalBlockNum = block; neloc.partitionReferenceNum = epos->block.partitionReferenceNum; @@ -1962,6 +1964,8 @@ int __udf_add_aext(struct inode *inode, struct extent_position *epos, adsize = sizeof(struct short_ad); else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) adsize = sizeof(struct long_ad); + else + return -EIO; if (!epos->bh) { WARN_ON(iinfo->i_lenAlloc != |