linux/drivers/md/dm-crypt.c
Eric Biggers afa82093ef dm crypt: fix free of bad values after tfm allocation failure
commit 5d0be84ec0 upstream.

If crypt_alloc_tfms() had to allocate multiple tfms and it failed before
the last allocation, then it would call crypt_free_tfms() and could free
pointers from uninitialized memory -- due to the crypt_free_tfms() check
for non-zero cc->tfms[i].  Fix by allocating zeroed memory.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2016-11-20 01:17:20 +00:00

2013 lines
47 KiB