diff options
author | Steve Magnani <steve.magnani@digidescorp.com> | 2017-10-12 08:48:40 -0500 |
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committer | Jan Kara <jack@suse.cz> | 2017-10-17 11:56:45 +0200 |
commit | b490bdd630cc43a5725e76c7c23f8a7e55551145 (patch) | |
tree | 9ee95e0af7d247b2a8b282b2b5ed1a783465e9da /virt/kvm | |
parent | 503c3117d05c184b431e403cd05c463ac41370f0 (diff) |
udf: Fix 64-bit sign extension issues affecting blocks > 0x7FFFFFFF
Large (> 1 TiB) UDF filesystems appear subject to several problems when
mounted on 64-bit systems:
* readdir() can fail on a directory containing File Identifiers residing
above 0x7FFFFFFF. This manifests as a 'ls' command failing with EIO.
* FIBMAP on a file block located above 0x7FFFFFFF can return a negative
value. The low 32 bits are correct, but applications that don't mask the
high 32 bits of the result can perform incorrectly.
Per suggestion by Jan Kara, introduce a udf_pblk_t type for representation
of UDF block addresses. Ultimately, all driver functions that manipulate
UDF block addresses should use this type; for now, deployment is limited
to functions with actual or potential sign extension issues.
Changes to udf_readdir() and udf_block_map() address the issues noted
above; other changes address potential similar issues uncovered during
audit of the driver code.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'virt/kvm')
0 files changed, 0 insertions, 0 deletions