6.6-stable review patch. If anyone has any objections, please let me know.
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From: Alison Schofield alison.schofield@intel.com
commit f59b701b4674f7955170b54c4167c5590f4714eb upstream.
KASAN reports a global-out-of-bounds access when running these nfit tests: clear.sh, pmem-errors.sh, pfn-meta-errors.sh, btt-errors.sh, daxdev-errors.sh, and inject-error.sh.
[] BUG: KASAN: global-out-of-bounds in nfit_test_ctl+0x769f/0x7840 [nfit_test] [] Read of size 4 at addr ffffffffc03ea01c by task ndctl/1215 [] The buggy address belongs to the variable: [] handle+0x1c/0x1df4 [nfit_test]
nfit_test_search_spa() uses handle[nvdimm->id] to retrieve a device handle and triggers a KASAN error when it reads past the end of the handle array. It should not be indexing the handle array at all.
The correct device handle is stored in per-DIMM test data. Each DIMM has a struct nfit_mem that embeds a struct acpi_nfit_memdev that describes the NFIT device handle. Use that device handle here.
Fixes: 10246dc84dfc ("acpi nfit: nfit_test supports translate SPA") Cc: stable@vger.kernel.org Signed-off-by: Alison Schofield alison.schofield@intel.com Reviewed-by: Dave Jiang dave.jiang@intel.com> --- Link: https://patch.msgid.link/20251031234227.1303113-1-alison.schofield@intel.com Signed-off-by: Ira Weiny ira.weiny@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/nvdimm/test/nfit.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
--- a/tools/testing/nvdimm/test/nfit.c +++ b/tools/testing/nvdimm/test/nfit.c @@ -670,6 +670,7 @@ static int nfit_test_search_spa(struct n .addr = spa->spa, .region = NULL, }; + struct nfit_mem *nfit_mem; u64 dpa;
ret = device_for_each_child(&bus->dev, &ctx, @@ -687,8 +688,12 @@ static int nfit_test_search_spa(struct n */ nd_mapping = &nd_region->mapping[nd_region->ndr_mappings - 1]; nvdimm = nd_mapping->nvdimm; + nfit_mem = nvdimm_provider_data(nvdimm); + if (!nfit_mem) + return -EINVAL;
- spa->devices[0].nfit_device_handle = handle[nvdimm->id]; + spa->devices[0].nfit_device_handle = + __to_nfit_memdev(nfit_mem)->device_handle; spa->num_nvdimms = 1; spa->devices[0].dpa = dpa;