3.13.11-ckt22 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Jan Kara <[email protected]> commit 79144954278d4bb5989f8b903adcac7a20ff2a5a upstream. Store blocksize in a local variable in udf_fill_inode() since it is used a lot of times. Signed-off-by: Jan Kara <[email protected]> Reference: CVE-2015-4167 BugLink: https://bugs.launchpad.net/bugs/1462173 [ luis: used Ben's backport to 3.16: adjusted context ] Signed-off-by: Luis Henriques <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- fs/udf/inode.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/fs/udf/inode.c b/fs/udf/inode.c index cc2ae84..8aa2b1b 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -1286,6 +1286,7 @@ static void __udf_read_inode(struct inode *inode) struct udf_sb_info *sbi = UDF_SB(inode->i_sb); unsigned int link_count; unsigned int indirections = 0; + int bs = inode->i_sb->s_blocksize; reread: /* @@ -1371,41 +1372,38 @@ reread: if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { iinfo->i_efe = 1; iinfo->i_use = 0; - if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - + if (udf_alloc_i_data(inode, bs - sizeof(struct extendedFileEntry))) { make_bad_inode(inode); return; } memcpy(iinfo->i_ext.i_data, bh->b_data + sizeof(struct extendedFileEntry), - inode->i_sb->s_blocksize - - sizeof(struct extendedFileEntry)); + bs - sizeof(struct extendedFileEntry)); } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { iinfo->i_efe = 0; iinfo->i_use = 0; - if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - - sizeof(struct fileEntry))) { + if (udf_alloc_i_data(inode, bs - sizeof(struct fileEntry))) { make_bad_inode(inode); return; } memcpy(iinfo->i_ext.i_data, bh->b_data + sizeof(struct fileEntry), - inode->i_sb->s_blocksize - sizeof(struct fileEntry)); + bs - sizeof(struct fileEntry)); } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { iinfo->i_efe = 0; iinfo->i_use = 1; iinfo->i_lenAlloc = le32_to_cpu( ((struct unallocSpaceEntry *)bh->b_data)-> lengthAllocDescs); - if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - + if (udf_alloc_i_data(inode, bs - sizeof(struct unallocSpaceEntry))) { make_bad_inode(inode); return; } memcpy(iinfo->i_ext.i_data, bh->b_data + sizeof(struct unallocSpaceEntry), - inode->i_sb->s_blocksize - - sizeof(struct unallocSpaceEntry)); + bs - sizeof(struct unallocSpaceEntry)); return; } @@ -1493,8 +1491,7 @@ reread: return; } /* File in ICB has to fit in there... */ - if (inode->i_size > inode->i_sb->s_blocksize - - udf_file_entry_alloc_offset(inode)) { + if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) { make_bad_inode(inode); return; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
