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Tue, 28 Nov 2023 15:55:34 +0800 Received: from mszsdtlt102.gcn.mediatek.inc (10.16.4.142) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 28 Nov 2023 15:55:34 +0800 From: Haibo Li To: CC: Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , "Andrew Morton" , Matthias Brugger , AngeloGioacchino Del Regno , , , , , , Haibo Li , kernel test robot Subject: [PATCH] fix comparison of unsigned expression < 0 Date: Tue, 28 Nov 2023 15:55:32 +0800 Message-ID: <20231128075532.110251-1-haibo.li@mediatek.com> X-Mailer: git-send-email 2.34.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--2.749500-8.000000 X-TMASE-MatchedRID: iv01+ZwXeFIryFHbNnBLG0Zakoam9+aebT2gc93yznn9Ez/5IpHqp8lm 7UT8OKjb009cKtuMq44lKzzhiO1jPncna+FgAjo0nVTWWiNp+v/jxSCk4x2AYd9RlPzeVuQQObA 90TJq6C8/ApdYBbUVKYAy6p60ZV621gi3JUE8ePKSkBrqwsq4PfoLR4+zsDTttrrTuahHzlFU1G 84il7EfntKKivhCrlfE0eoKE0hYr807dg5hv5gH9S5x4PKrQ/8rxK9BaJJfxtRJt1IVZ02lKixa UIRQLoOAGAn9m+WxPvyNp7g4PXe0BXsxz6ujBxUq1f8XSkHBUmNJXmEMVvLtpRMZUCEHkRt X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--2.749500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 181391F854EACAAB2F00F5A6344B770795AAFA39D774CB1EEFDEC7134135C8032000:8 X-MTK: N X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 8FEBE14000E X-Stat-Signature: 519p1i5ysso8rqt7oq9bt41rpr9woayu X-Rspam-User: X-HE-Tag: 1701159085-82814 X-HE-Meta: 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 PKG02Cqx yNR+I5kSJ1Ha2PmOaMiazbHtmzKqsuGXWPMGaU0SFZH53lfoUv44nqCnqB6XCLbKyb1hx3V481B9KxRZ/JMamBOvHzKigbgxbe9DyRPoyOOSviDXQi6477gYcDGnmfVkE/8dnKCoa1ohyFhW8a8EN7vKDNGCd90bgHuzHnZHbWJKC4U4zEHJktDEm1sSWhqqxnGlr/SEW5ZZ5hNkFTibh4kVSCplGNvtIQPEvCYG5IdlPoqmzZqXtnCtw88dleepZCccTLIKcA2BG9C0pNR3GHsB/uAqbzUEAzMPAGOOVUWtFNoXkRh+e9+K7Ch0g3GsDNdAMyszdpBDuZQzzKxtk2pAQVFTzWbhMOPJCtmtmtlGYWeE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Kernel test robot reported: ''' mm/kasan/report.c:637 kasan_non_canonical_hook() warn: unsigned 'addr' is never less than zero. ''' The KASAN_SHADOW_OFFSET is 0 on loongarch64. To fix it,check the KASAN_SHADOW_OFFSET before do comparison. Signed-off-by: Haibo Li Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/ 202311270743.3oTCwYPd-lkp@intel.com/ --- mm/kasan/report.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index e77facb62900..dafec2df0268 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -634,10 +634,10 @@ void kasan_non_canonical_hook(unsigned long addr) { unsigned long orig_addr; const char *bug_type; - +#if KASAN_SHADOW_OFFSET > 0 if (addr < KASAN_SHADOW_OFFSET) return; - +#endif orig_addr = (addr - KASAN_SHADOW_OFFSET) << KASAN_SHADOW_SCALE_SHIFT; /* * For faults near the shadow address for NULL, we can be fairly certain -- 2.18.0