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| author | Laura Abbott <labbott@fedoraproject.org> | 2016-02-25 16:36:42 -0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-03-01 14:29:13 -0800 |
| commit | bc0b8cc6cb26a209fa1679d5c063b47bc0afe964 (patch) | |
| tree | 6edbd0fa562a4505d21906d1db3feae7fea16841 /drivers/misc/cb710 | |
| parent | ea861d73a9aa97a5e0c7cef6a26ce01786e0c58d (diff) | |
| download | linux-bc0b8cc6cb26a209fa1679d5c063b47bc0afe964.tar.gz linux-bc0b8cc6cb26a209fa1679d5c063b47bc0afe964.tar.bz2 linux-bc0b8cc6cb26a209fa1679d5c063b47bc0afe964.zip | |
lkdtm: Add READ_AFTER_FREE test
In a similar manner to WRITE_AFTER_FREE, add a READ_AFTER_FREE
test to test free poisoning features. Sample output when
no sanitization is present:
# echo READ_AFTER_FREE > /sys/kernel/debug/provoke-crash/DIRECT
[ 17.542473] lkdtm: Performing direct entry READ_AFTER_FREE
[ 17.543866] lkdtm: Value in memory before free: 12345678
[ 17.545212] lkdtm: Attempting bad read from freed memory
[ 17.546542] lkdtm: Memory was not poisoned
with slub_debug=P:
# echo READ_AFTER_FREE > /sys/kernel/debug/provoke-crash/DIRECT
[ 22.415531] lkdtm: Performing direct entry READ_AFTER_FREE
[ 22.416366] lkdtm: Value in memory before free: 12345678
[ 22.417137] lkdtm: Attempting bad read from freed memory
[ 22.417897] lkdtm: Memory correctly poisoned, calling BUG
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/misc/cb710')
0 files changed, 0 insertions, 0 deletions