github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-28 01:55:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

cxl/test: Fix __fortify_panic

Browse Source 
Fix a runtime assertion in setup_xor_mapping(). Fortify complains that it
is potentially overflowing the xormaps array per __counted_by(nr_maps).
Quiet the false positive by initializing @nr_maps earlier.

 memcpy: detected buffer overflow: 32 byte write of buffer size 0
 WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728
 Call Trace:
  __fortify_panic+0xd/0xf
  setup_xor_mapping+0x6c/0xa0 [cxl_translate]

[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]

Fixes: 06377c54a1 ("cxl/test: Add cxl_translate module for address translation testing")
Signed-off-by: Dan Williams <djbw@kernel.org>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260519221204.1517773-3-djbw@kernel.org
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Dan Williams 2026-05-19 15:12:04 -07:00 committed by Dave Jiang
parent 6c9d2e87df
commit 08326b92c7
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/cxl/test/cxl_translate.c
View File

@ -236,8 +236,8 @@ static int setup_xor_mapping(void)
if (!cximsd)
return -ENOMEM;
memcpy(cximsd->xormaps, xormaps, nr_maps * sizeof(*cximsd->xormaps));
cximsd->nr_maps = nr_maps;
memcpy(cximsd->xormaps, xormaps, nr_maps * sizeof(*cximsd->xormaps));
return 0;
}