https://sourceware.org/bugzilla/show_bug.cgi?id=28101
Mark Wielaard <mark at klomp dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mark at klomp dot org --- Comment #1 from Mark Wielaard <mark at klomp dot org> --- I think it really is a bug/performance issue in asan. But "optimizing" it in libelf by first checking the last char is zero, before calling memrchr wouldn't hurt (and should normally prevent a function call). Does the following help? diff --git a/libelf/elf_strptr.c b/libelf/elf_strptr.c index 76f2caf1..dc9b76c0 100644 --- a/libelf/elf_strptr.c +++ b/libelf/elf_strptr.c @@ -56,7 +56,9 @@ get_zdata (Elf_Scn *strscn) static bool validate_str (const char *str, size_t from, size_t to) { #if HAVE_DECL_MEMRCHR - return memrchr (&str[from], '\0', to - from) != NULL; + // Check end first, which is likely a zero terminator, to prevent function call + return (str[to - 1] == '\0' + || (to - from > 0 && memrchr (&str[from], '\0', to - from - 1) != NULL)); #else do { if (to <= from) -- You are receiving this mail because: You are on the CC list for the bug.