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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/104929] New: UBSAN: false positive with sprintf Date: Tue, 15 Mar 2022 09:25:05 +0000 [thread overview] Message-ID: <bug-104929-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104929 Bug ID: 104929 Summary: UBSAN: false positive with sprintf Product: gcc Version: 11.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: jengelh at inai dot de CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org Target Milestone: --- // g++ -Wall -fsanitize=undefined -O2 -c t.cpp #include <cstdio> size_t fun(char *s) { sprintf(s, " "); return __builtin_strlen(s); } Observed: t.cpp: In function ‘size_t fun(char*)’: t.cpp:5:16: warning: null destination pointer [-Wformat-overflow=] 5 | sprintf(s, " "); //gcc version 11.2.1 20220103 [revision d4a1d3c4b377f1d4acb34fe1b55b5088a3f293f6] (SUSE Linux), Linux amd64 glibc-2.35 Expected: Don't warn(?)
next reply other threads:[~2022-03-15 9:25 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-15 9:25 jengelh at inai dot de [this message] 2022-03-15 9:27 ` [Bug sanitizer/104929] " marxin at gcc dot gnu.org 2022-03-15 9:42 ` schwab@linux-m68k.org 2022-03-15 9:56 ` jakub at gcc dot gnu.org
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