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AJvYcCUh/4CbldgyR4tm5FGgNJlX+3tkIn0QTL/B6GE+FIWdKX40H4fS4iRzv0CMbLNWI40aCLNN7/IaRs1C8yik@vger.kernel.org X-Gm-Message-State: AOJu0YzRDay8T6qUJ3ftzH0V9LrOsFwi1IL4mfivOpCR1se/i8uWw/tS rVS1B/U1p9UTN2qxjPvbKB/5YWPiyHPR4BlTaVS0zKfltaMiDKS2BL8oMpv7rngUuw== X-Google-Smtp-Source: AGHT+IHuAOxtXzCgPBrdp5bAmlVDtunUBAbbk6Zek1hc3Rqn5Vy7UfRbt6b5OUG2vQgJn7Pm/udst/k= X-Received: from pjbsi7.prod.google.com ([2002:a17:90b:5287:b0:2fc:2e92:6cf]) (user=pcc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3b50:b0:301:1bce:c258 with SMTP id 98e67ed59e1d1-3053215e7femr21514740a91.22.1743638916776; Wed, 02 Apr 2025 17:08:36 -0700 (PDT) Date: Wed, 2 Apr 2025 17:06:58 -0700 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.49.0.472.ge94155a9ec-goog Message-ID: <20250403000703.2584581-1-pcc@google.com> Subject: [PATCH v5 0/2] string: Add load_unaligned_zeropad() code path to sized_strscpy() From: Peter Collingbourne To: Alexander Viro , Christian Brauner , Jan Kara , Andrew Morton , Kees Cook , Andy Shevchenko , Andrey Konovalov , Catalin Marinas , Mark Rutland Cc: Peter Collingbourne , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org This series fixes an issue where strscpy() would sometimes trigger a false positive KASAN report with MTE. v5: - add test for unreadable first byte of strscpy() source v4: - clarify commit message - improve comment v3: - simplify test case Peter Collingbourne (1): string: Add load_unaligned_zeropad() code path to sized_strscpy() Vincenzo Frascino (1): kasan: Add strscpy() test to trigger tag fault on arm64 lib/string.c | 13 ++++++++++--- mm/kasan/kasan_test_c.c | 20 ++++++++++++++++++++ 2 files changed, 30 insertions(+), 3 deletions(-)