Say we got really unlucky and these failed on the last iteration, then
it could lead to a use after free bug.
Fixes: cd6851f30386 ("smc: remote memory buffers (RMBs)")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
__GFP_NORETRY);
if (!sndbuf_desc->cpu_addr) {
kfree(sndbuf_desc);
+ sndbuf_desc = NULL;
/* if send buffer allocation has failed,
* try a smaller one
*/
if (rc) {
kfree(sndbuf_desc->cpu_addr);
kfree(sndbuf_desc);
+ sndbuf_desc = NULL;
continue; /* if mapping failed, try smaller one */
}
sndbuf_desc->used = 1;
__GFP_NORETRY);
if (!rmb_desc->cpu_addr) {
kfree(rmb_desc);
+ rmb_desc = NULL;
/* if RMB allocation has failed,
* try a smaller one
*/
if (rc) {
kfree(rmb_desc->cpu_addr);
kfree(rmb_desc);
+ rmb_desc = NULL;
continue; /* if mapping failed, try smaller one */
}
rc = smc_ib_get_memory_region(lgr->lnk[SMC_SINGLE_LINK].roce_pd,
DMA_FROM_DEVICE);
kfree(rmb_desc->cpu_addr);
kfree(rmb_desc);
+ rmb_desc = NULL;
continue;
}
rmb_desc->used = 1;