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| author | Kees Cook <keescook@chromium.org> | 2023-04-07 12:27:16 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2024-02-29 13:38:02 -0800 |
| commit | 3d965b33e40d973b450cb0212913f039476c16f4 (patch) | |
| tree | 213bf660d55d66a2a4a273f8394156f30f83410c /lib/fortify_kunit.c | |
| parent | fa4a3f86d4982b603865ccb97dde82f0ae1e3302 (diff) | |
| download | linux-stable-3d965b33e40d973b450cb0212913f039476c16f4.tar.gz linux-stable-3d965b33e40d973b450cb0212913f039476c16f4.tar.bz2 linux-stable-3d965b33e40d973b450cb0212913f039476c16f4.zip | |
fortify: Improve buffer overflow reporting
Improve the reporting of buffer overflows under CONFIG_FORTIFY_SOURCE to
help accelerate debugging efforts. The calculations are all just sitting
in registers anyway, so pass them along to the function to be reported.
For example, before:
detected buffer overflow in memcpy
and after:
memcpy: detected buffer overflow: 4096 byte read of buffer size 1
Link: https://lore.kernel.org/r/20230407192717.636137-10-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'lib/fortify_kunit.c')
| -rw-r--r-- | lib/fortify_kunit.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/fortify_kunit.c b/lib/fortify_kunit.c index f0accebeca02..493ec02dd5b3 100644 --- a/lib/fortify_kunit.c +++ b/lib/fortify_kunit.c @@ -17,8 +17,8 @@ /* Redefine fortify_panic() to track failures. */ void fortify_add_kunit_error(int write); -#define fortify_panic(func, write, retfail) do { \ - __fortify_report(FORTIFY_REASON(func, write)); \ +#define fortify_panic(func, write, avail, size, retfail) do { \ + __fortify_report(FORTIFY_REASON(func, write), avail, size); \ fortify_add_kunit_error(write); \ return (retfail); \ } while (0) |