diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-16 22:41:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-16 22:41:47 +0200 |
| commit | f685fc6ab05192c7bb924288c8685b95e92a7c65 (patch) | |
| tree | 804b643604f19adefdcbd03065bb3e1bee515cf7 /drivers/md/dm-verity-target.c | |
| parent | firmware: coreboot: Only populate devices in coreboot_table_init() (diff) | |
| parent | Linux 4.19-rc4 (diff) | |
| download | linux-f685fc6ab05192c7bb924288c8685b95e92a7c65.tar.xz linux-f685fc6ab05192c7bb924288c8685b95e92a7c65.zip | |
Merge b4.19-rc4 into char-misc-next
We want the bugfixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-verity-target.c')
| -rw-r--r-- | drivers/md/dm-verity-target.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 12decdbd722d..fc65f0dedf7f 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -99,10 +99,26 @@ static int verity_hash_update(struct dm_verity *v, struct ahash_request *req, { struct scatterlist sg; - sg_init_one(&sg, data, len); - ahash_request_set_crypt(req, &sg, NULL, len); - - return crypto_wait_req(crypto_ahash_update(req), wait); + if (likely(!is_vmalloc_addr(data))) { + sg_init_one(&sg, data, len); + ahash_request_set_crypt(req, &sg, NULL, len); + return crypto_wait_req(crypto_ahash_update(req), wait); + } else { + do { + int r; + size_t this_step = min_t(size_t, len, PAGE_SIZE - offset_in_page(data)); + flush_kernel_vmap_range((void *)data, this_step); + sg_init_table(&sg, 1); + sg_set_page(&sg, vmalloc_to_page(data), this_step, offset_in_page(data)); + ahash_request_set_crypt(req, &sg, NULL, this_step); + r = crypto_wait_req(crypto_ahash_update(req), wait); + if (unlikely(r)) + return r; + data += this_step; + len -= this_step; + } while (len); + return 0; + } } /* |