Use strerror_r(3) for the printf family %m.
There's TLS space used for unknown errno values, and a call to printf
shouldn't clobber that. No-one will ever hit this in real life, but
since it's easily fixed...
Bug: http://b/112776560
Test: ran tests
Change-Id: I8c2437f2e5214e652119791d4e162a197b049d5b
diff --git a/libc/stdio/vfprintf.cpp b/libc/stdio/vfprintf.cpp
index 8b247e9..d99d09c 100644
--- a/libc/stdio/vfprintf.cpp
+++ b/libc/stdio/vfprintf.cpp
@@ -453,7 +453,7 @@
case 'n':
__fortify_fatal("%%n not allowed on Android");
case 'm':
- cp = strerror(caller_errno);
+ cp = strerror_r(caller_errno, buf, sizeof(buf));
goto string;
case 'O':
flags |= LONGINT;