https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87884
Bug ID: 87884
Summary: ubsan causes wrong -Wformat-overflow warning
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: stsp at users dot sourceforge.net
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: ---
Created attachment 44959
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44959&action=edit
test case
Hello.
Attached is the reduced test-case.
It gives:
---
gcc -c -Wall -fsanitize=undefined -O2 mangle.c -I.
mangle.c: In function 'name_convert':
mangle.c:57:3: warning: null destination pointer [-Wformat-overflow=]
sprintf(s,"%s","test");
---
Which is wrong.
Plus, I am not sure if "-Wformat-overflow=" is a
correct switch for this type of warning.
