Messages in this thread | | | From | Stas Sergeev <> | Subject | [PATCH 0/2] sigaltstack: return only one flag | Date | Wed, 26 Jan 2022 22:14:39 +0300 |
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Currently sigaltstack() can return multiple flags, for example SS_DISABLE|SS_AUTODISARM. This confuses libraries (including asan runtime) and contradicts the man page.
Patch 1 fixes this problem by ignoring any flag passed with SS_DISABLE. Patch 2 adds a test-case for that scenario.
Signed-off-by: Stas Sergeev <stsp2@yandex.ru> CC: "Eric W. Biederman" <ebiederm@xmission.com> CC: Kees Cook <keescook@chromium.org> CC: Jens Axboe <axboe@kernel.dk> CC: Peter Zijlstra <peterz@infradead.org> CC: Marco Elver <elver@google.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Alexey Gladkov <legion@kernel.org> CC: Andrew Lutomirski <luto@mit.edu> CC: Shuah Khan <shuah@kernel.org> CC: "Chang S. Bae" <chang.seok.bae@intel.com> CC: Borislav Petkov <bp@suse.de> CC: Thomas Gleixner <tglx@linutronix.de> CC: Len Brown <len.brown@intel.com> CC: linux-kselftest@vger.kernel.org CC: linux-kernel@vger.kernel.org
Stas Sergeev (2): sigaltstack: ignore flags if SS_DISABLE is set selftests: sigaltstack: add new SS_DISABLE test
kernel/signal.c | 1 + tools/testing/selftests/sigaltstack/sas.c | 48 ++++++++++++----------- 2 files changed, 26 insertions(+), 23 deletions(-)
-- 2.34.1
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