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Commit 1b6df693 authored by Dan Williams's avatar Dan Williams
Browse files

raid6test: fix stack overflow 



Testing on x86_64 with NDISKS=255 yields:

   do_IRQ: modprobe near stack overflow (cur:ffff88007d19c000,sp:ffff88007d19c128)

...and eventually

   general protection fault: 0000 [#1]

Moving the scribble buffers off the stack allows the test to complete
successfully.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 376ec376

crypto/async_tx/raid6test.c

+1 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#define NDISKS 16 /* Including P and Q */



static struct page *dataptrs[NDISKS];

static addr_conv_t addr_conv[NDISKS];

static struct page *data[NDISKS+3];

static struct page *spare;

static struct page *recovi;
@@ -69,7 +70,6 @@ static char disk_type(int d, int disks) 
static void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, struct page **ptrs)

{

	struct async_submit_ctl submit;

	addr_conv_t addr_conv[disks];

	struct completion cmp;

	struct dma_async_tx_descriptor *tx = NULL;

	enum sum_check_flags result = ~0;
@@ -156,7 +156,6 @@ static int test_disks(int i, int j, int disks) 


static int test(int disks, int *tests)

{

	addr_conv_t addr_conv[disks];

	struct dma_async_tx_descriptor *tx;

	struct async_submit_ctl submit;

	struct completion cmp;