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Fix inst_num overflow in qat_crypt.c 

This patch fixes the same issue which was previously addressed in
6051.  The variable "inst_num" was of the incorrect type and
"atomic_inc_32_nv()" could cause an overflow damaging its neighbor.

Cast the return value of atomic_inc_32_nv() to Cpa32U.

Fix a few types for num_inst for clarity.

Reviewed-by: Weigang Li <weigang.li@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7468
This commit is contained in:
Brian Behlendorf 2018-05-01 20:44:24 -07:00 committed by GitHub
parent 2c24b5b148
commit bc8a6a60e9
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 8 additions and 11 deletions
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8
module/zfs/qat_compress.c
View File

@ -71,9 +71,8 @@ qat_dc_clean(void)
{
Cpa16U buff_num = 0;
Cpa16U num_inter_buff_lists = 0;
Cpa16U i = 0;
for (i = 0; i < num_inst; i++) {
for (Cpa16U i = 0; i < num_inst; i++) {
cpaDcStopInstance(dc_inst_handles[i]);
QAT_PHYS_CONTIG_FREE(session_handles[i]);
/* free intermediate buffers */
@ -111,7 +110,6 @@ qat_dc_init(void)
Cpa16U buff_num = 0;
Cpa32U buff_meta_size = 0;
CpaDcSessionSetupData sd = {0};
Cpa16U i;
status = cpaDcGetNumInstances(&num_inst);
if (status != CPA_STATUS_SUCCESS)
@ -128,7 +126,7 @@ qat_dc_init(void)
if (status != CPA_STATUS_SUCCESS)
return (-1);
for (i = 0; i < num_inst; i++) {
for (Cpa16U i = 0; i < num_inst; i++) {
cpaDcSetAddressTranslation(dc_inst_handles[i],
(void*)virt_to_phys);
@ -286,7 +284,7 @@ qat_compress_impl(qat_compress_dir_t dir, char *src, int src_len,
num_add_buf * sizeof (struct page *)) != CPA_STATUS_SUCCESS)
goto fail;
i = atomic_inc_32_nv(&inst_num) % num_inst;
i = (Cpa32U)atomic_inc_32_nv(&inst_num) % num_inst;
dc_inst_handle = dc_inst_handles[i];
session_handle = session_handles[i];

11
module/zfs/qat_crypt.c
View File

@ -47,7 +47,7 @@
#define MAX_PAGE_NUM 1024
static Cpa16U inst_num = 0;
static Cpa32U inst_num = 0;
static Cpa16U num_inst = 0;
static CpaInstanceHandle cy_inst_handles[QAT_CRYPT_MAX_INSTANCES];
static boolean_t qat_crypt_init_done = B_FALSE;
@ -93,7 +93,7 @@ qat_checksum_use_accel(size_t s_len)
void
qat_crypt_clean(void)
{
for (Cpa32U i = 0; i < num_inst; i++)
for (Cpa16U i = 0; i < num_inst; i++)
cpaCyStopInstance(cy_inst_handles[i]);
num_inst = 0;
@ -103,7 +103,6 @@ qat_crypt_clean(void)
int
qat_crypt_init(void)
{
Cpa32U i;
CpaStatus status = CPA_STATUS_FAIL;
status = cpaCyGetNumInstances(&num_inst);
@ -121,7 +120,7 @@ qat_crypt_init(void)
if (status != CPA_STATUS_SUCCESS)
return (-1);
for (i = 0; i < num_inst; i++) {
for (Cpa16U i = 0; i < num_inst; i++) {
status = cpaCySetAddressTranslation(cy_inst_handles[i],
(void *)virt_to_phys);
if (status != CPA_STATUS_SUCCESS)
@ -322,7 +321,7 @@ qat_crypt(qat_encrypt_dir_t dir, uint8_t *src_buf, uint8_t *dst_buf,
QAT_STAT_INCR(decrypt_total_in_bytes, enc_len);
}
i = atomic_inc_32_nv(&inst_num) % num_inst;
i = (Cpa32U)atomic_inc_32_nv(&inst_num) % num_inst;
cy_inst_handle = cy_inst_handles[i];
status = qat_init_crypt_session_ctx(dir, cy_inst_handle,
@ -468,7 +467,7 @@ qat_checksum(uint64_t cksum, uint8_t *buf, uint64_t size, zio_cksum_t *zcp)
QAT_STAT_BUMP(cksum_requests);
QAT_STAT_INCR(cksum_total_in_bytes, size);
i = atomic_inc_32_nv(&inst_num) % num_inst;
i = (Cpa32U)atomic_inc_32_nv(&inst_num) % num_inst;
cy_inst_handle = cy_inst_handles[i];
status = qat_init_checksum_session_ctx(cy_inst_handle,