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author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2018-02-01 21:00:51 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-01 12:20:21 -0800 |
commit | bfe7aa6c39b12a6ab1e95f50271c53e47d6dd060 (patch) | |
tree | 9ed9553b19b251b34f55da97aaf4c43fec7abb9c /fs/userfaultfd.c | |
parent | 1a3241ff10d038ecd096d03380327f2a0b5840a6 (diff) | |
download | linux-bfe7aa6c39b12a6ab1e95f50271c53e47d6dd060.tar.gz linux-bfe7aa6c39b12a6ab1e95f50271c53e47d6dd060.tar.bz2 linux-bfe7aa6c39b12a6ab1e95f50271c53e47d6dd060.zip |
fs/dcache: Use read_word_at_a_time() in dentry_string_cmp()
dentry_string_cmp() performs the word-at-a-time reads from 'cs' and may
read slightly more than it was requested in kmallac(). Normally this
would make KASAN to report out-of-bounds access, but this was
workarounded by commit df4c0e36f1b1 ("fs: dcache: manually unpoison
dname after allocation to shut up kasan's reports").
This workaround is not perfect, since it allows out-of-bounds access to
dentry's name for all the code, not just in dentry_string_cmp().
So it would be better to use read_word_at_a_time() instead and revert
commit df4c0e36f1b1.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/userfaultfd.c')
0 files changed, 0 insertions, 0 deletions