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assert: Remove the use of %n from __assert_fail_base (BZ #32456)

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The require size for mmap can be inferred from __vasprintf return
value.  It also fixes tst-assert-2 when building with --enable-fortify,
where even if the format is not translated, __readonly_area fails
because malloc can not be used.

Checked on aarch64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
This commit is contained in:
Adhemerval Zanella
2024-12-30 16:36:18 -03:00
parent 37d0a3e55a
commit 6f0ea84f17
3 changed files with 15 additions and 26 deletions
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assert/assert-perr.c
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@@ -32,7 +32,7 @@ __assert_perror_fail (int errnum,
char errbuf[1024];
char *e = __strerror_r (errnum, errbuf, sizeof errbuf);
__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n%n"),
__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
e, file, line, function);
}
libc_hidden_def (__assert_perror_fail)