diff options
| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-27 10:29:51 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-03-06 11:05:37 -0800 |
| commit | 9741a559971856fca61a83840b558b4f94500d89 (patch) | |
| tree | ab66750172619c8af0d38aeb85e60c6e8bcf84f2 /tools/testing/nvdimm | |
| parent | d7d8464dcc27dfc9d0d23c7924b2e6f4bb16c6c2 (diff) | |
| download | lwn-9741a559971856fca61a83840b558b4f94500d89.tar.gz lwn-9741a559971856fca61a83840b558b4f94500d89.zip | |
nfit_test: fix buffer overrun, add sanity check
It turns out that we were overrunning the 'nfit_buf' buffer in
nfit_test0_setup() in the (t->setup_hotplug == 1) case because we failed to
correctly account for all of the acpi_nfit_memory_map structures.
Fix the structure count which will increase the allocation size of
'nfit_buf' in nfit_test0_alloc(). Also add some WARN_ON()s to
nfit_test0_setup() and nfit_test1_setup() to catch future issues where the
size of the buffer doesn't match the amount of data we're writing.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/testing/nvdimm')
| -rw-r--r-- | tools/testing/nvdimm/test/nfit.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c index 1376fc95c33a..fcd233342273 100644 --- a/tools/testing/nvdimm/test/nfit.c +++ b/tools/testing/nvdimm/test/nfit.c @@ -104,7 +104,8 @@ enum { NUM_HINTS = 8, NUM_BDW = NUM_DCR, NUM_SPA = NUM_PM + NUM_DCR + NUM_BDW, - NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + 4 /* spa1 iset */, + NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + + 4 /* spa1 iset */ + 1 /* spa11 iset */, DIMM_SIZE = SZ_32M, LABEL_SIZE = SZ_128K, SPA_VCD_SIZE = SZ_4M, @@ -2047,6 +2048,9 @@ static void nfit_test0_setup(struct nfit_test *t) flush->hint_address[i] = t->flush_dma[4] + i * sizeof(u64); offset += flush->header.length; + + /* sanity check to make sure we've filled the buffer */ + WARN_ON(offset != t->nfit_size); } post_ars_status(&t->ars_state, &t->badrange, t->spa_set_dma[0], @@ -2165,6 +2169,9 @@ static void nfit_test1_setup(struct nfit_test *t) dcr->windows = 0; offset += dcr->header.length; + /* sanity check to make sure we've filled the buffer */ + WARN_ON(offset != t->nfit_size); + post_ars_status(&t->ars_state, &t->badrange, t->spa_set_dma[0], SPA2_SIZE); |