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Red Hat Bugzilla – Attachment 1409995 Details for
Bug 1558107
strerror_r returns a malformed buffer
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minimized reproducer
test.c (text/plain), 639 bytes, created by
Robbie Harwood
on 2018-03-19 16:10:59 UTC
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Description:
minimized reproducer
Filename:
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Creator:
Robbie Harwood
Created:
2018-03-19 16:10:59 UTC
Size:
639 bytes
patch
obsolete
>#define _GNU_SOURCE > >#include <stdio.h> >#include <stdlib.h> >#include <string.h> > >#define MAX_GP_STRERROR 1024 > >const char gp_internal_err[] = "Internal strerror_r() error."; > >int main(int argc, char *argv[]) { > static __thread char buf[MAX_GP_STRERROR]; > char *ret; > > ret = strerror_r(2, buf, MAX_GP_STRERROR); > if (ret == NULL) { > memset(buf, 0, MAX_GP_STRERROR); > strncpy(buf, gp_internal_err, MAX_GP_STRERROR); > buf[MAX_GP_STRERROR -1] = '\0'; > } else if (ret != buf) { > memset(buf, 0, MAX_GP_STRERROR); > strncpy(buf, ret, MAX_GP_STRERROR); > buf[MAX_GP_STRERROR -1] = '\0'; > } > printf("%s\n", buf); > return 0; >}
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