From: Mikulas Patocka Date: Thu, 9 Jul 2026 19:22:47 +0000 (+0200) Subject: dm-integrity: fix leaking uninitialized kernel memory X-Git-Tag: v7.2-rc3~11^2~12 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7bb03b2b01b814a9fc14afbfc2cbb2cca5b34750;p=thirdparty%2Fkernel%2Flinux.git dm-integrity: fix leaking uninitialized kernel memory If hash size is less than device's tuple size, dm-integrity is supposed to zero the remaining space. There was a bug in the code that zeroing didn't work. This commit fixes it. Signed-off-by: Mikulas Patocka Assisted-by: Claude:claude-opus-4.6 Fixes: fb0987682c62 ("dm-integrity: introduce the Inline mode") Cc: stable@vger.kernel.org --- diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index dbabb8e46fb7..02b2805ed33a 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -2606,7 +2606,7 @@ skip_spinlock: struct bio_vec bv = bio_iter_iovec(bio, dio->bio_details.bi_iter); const char *mem = integrity_kmap(ic, bv.bv_page); if (ic->tag_size < ic->tuple_size) - memset(dio->integrity_payload + pos + ic->tag_size, 0, ic->tuple_size - ic->tuple_size); + memset(dio->integrity_payload + pos + ic->tag_size, 0, ic->tuple_size - ic->tag_size); integrity_sector_checksum(ic, &dio->ahash_req, dio->bio_details.bi_iter.bi_sector, mem, bv.bv_offset, dio->integrity_payload + pos); integrity_kunmap(ic, mem); pos += ic->tuple_size;