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| author |   Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-04-18 15:21:04 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-05-07 10:21:55 +0900 |
| commit | e8271fa3908de52937d298b339f9f7984c491cc6 (patch) | |
| tree | 12e866c9958e61a4e39a383c94938eb967a50d2c /fs/f2fs/node.h | |
| parent | f2fs: add available_nids to fix handling max_nid correctly (diff) | |
| download | linux-dev-e8271fa3908de52937d298b339f9f7984c491cc6.tar.xz linux-dev-e8271fa3908de52937d298b339f9f7984c491cc6.zip | |
f2fs: avoid BUG_ON when mouting corrupted image having garbage blocks
If the disk has some garbage blocks, F2FS is able to face with BUG_ON when
recovering direct node blocks.
This patch detects the error case and avoids that prior to reaching BUG_ON.
Alexey Khoroshilov addressed the potential security issues as follows.
"An ability to trigger a BUG_ON assert by mounting a crafted image is
usually considered as a local denial of service [1-3]. As far as I
understand, the reason is that some kernel data may become inconsistent
that can lead to further problems.
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3353
[2] http://www.openwall.com/lists/oss-security/2011/06/24/4
[3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2928
etc."
Reported-by: Andrey Tsyvarev <tsyvarev@ispras.ru>
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/node.h')
0 files changed, 0 insertions, 0 deletions