kamil 6f201b686b Avoid undefined behavior in fread(3) ... On the first call to fread(3), just after fopen(3) the internal buffers are empty. This means that _r and _p (among others) are zeroed. Passing NULL to the 2nd argument of memcpy(3) for the zero length is undefined. Calling _p += 0 triggers LLVM UBSan (NULL pointer arithmetic). Calling _p += 0, p += 0 and resid -= 0 has no effect. Replace the "fp->_r = 0;" logic with a short circuit jump to __srefill() that sets _r internally and refills the FILE buffers. No functional change from an end user point of view, except skipping a few dummy operations on the first call, for a FILE pointer, to fread(3).		2020-02-22 22:02:46 +00:00
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Makefile.inc	…
clrerr.c	…
dprintf.c	…
fclose.3	…
fclose.c	…
fdopen.c	Add O_REGULAR to enforce opening of only regular files	2017-11-09 20:30:01 +00:00
feof.c	…
ferror.3	…
ferror.c	…
fflush.3	Document history	2019-09-07 11:53:27 +00:00
fflush.c	…
fgetc.c	…
fgetln.3	Indent.	2018-07-04 07:38:38 +00:00
fgetln.c	…
fgetpos.c	…
fgets.3	…
fgets.c	…
fgetstr.c	…
fgetwc.c	…
fgetwln.3	…
fgetwln.c	…
fgetws.3	…
fgetws.c	…
fileext.h	…
fileno.c	…
findfp.c	…
flags.c	Add O_REGULAR to enforce opening of only regular files	2017-11-09 20:30:01 +00:00
floatio.h	…
flockfile.3	…
flockfile.c	…
fmemopen.3	…
fmemopen.c	…
fopen.3	Start documenting history	2019-09-02 00:30:58 +00:00
fopen.c	Revert to commits as they broke few rump tests	2018-01-17 01:24:29 +00:00
fparseln.3	…
fparseln.c	…
fprintf.c	remove diag assert - the compiler demands fp is non NULL now.	2019-01-23 00:05:47 +00:00
fpurge.c	…
fputc.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
fputs.3	Bump date for previous.	2017-07-30 23:13:24 +00:00
fputs.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
fputwc.c	…
fputws.3	…
fputws.c	…
fread.3	…
fread.c	Avoid undefined behavior in fread(3)	2020-02-22 22:02:46 +00:00
freopen.c	Revert to commits as they broke few rump tests	2018-01-17 01:24:29 +00:00
fscanf.c	…
fseek.3	…
fseek.c	…
fseeko.c	…
fsetpos.c	…
ftell.c	…
ftello.c	…
funopen.3	Minor markup and wording fixes.	2019-03-21 21:13:45 +00:00
funopen.c	…
fvwrite.c	…
fvwrite.h	…
fwalk.c	…
fwide.3	…
fwide.c	…
fwprintf.c	…
fwrite.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
fwscanf.c	…
getc.3	Start documenting history	2019-09-02 00:30:58 +00:00
getc.c	…
getchar.c	…
getdelim.3	…
getdelim.c	…
getline.c	…
gets.c	…
gettemp.c	…
gettemp.h	…
getw.c	…
getwc.3	Remove comma after last Nm entry	2017-10-25 17:03:30 +00:00
getwc.c	…
getwchar.c	…
glue.h	…
local.h	…
makebuf.c	Fix typo in the function comment.	2018-12-14 03:29:54 +00:00
mkdtemp.c	…
mkostemp.c	…
mkostemps.c	…
mkstemp.c	…
mkstemps.c	…
mktemp.3	…
mktemp.c	…
open_memstream.3	…
open_memstream.c	…
open_wmemstream.c	…
perror.c	…
printf.3	Fix plurals.	2017-12-31 07:22:55 +00:00
printf.c	…
printf_l.3	…
putc.3	putc & putw were in v1	2019-09-02 00:48:16 +00:00
putc.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
putchar.c	…
puts.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
putw.c	…
putwc.3	…
putwc.c	…
putwchar.c	…
refill.c	…
remove.3	…
remove.c	…
rewind.c	…
rget.c	…
scanf.3	…
scanf.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
scanf_l.3	…
setbuf.3	Don't leave a subordinate clause out in the cold.	2018-12-14 03:43:22 +00:00
setbuf.c	…
setbuffer.c	…
setvbuf.c	…
snprintf_ss.c	…
sscanf.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
stdio.3	Remove extra "an"	2018-02-22 08:33:43 +00:00
stdio.c	…
swprintf.c	…
swscanf.c	…
tempnam.c	…
tmpfile.c	…
tmpnam.3	Refer to "w+" as "mode" as that's what fopen(3) calls it.	2019-09-01 01:23:14 +00:00
tmpnam.c	…
ungetc.3	…
ungetc.c	…
ungetwc.3	…
ungetwc.c	…
vasprintf.c	…
vdprintf.c	…
vfprintf.c	…
vfscanf.c	…
vfwprintf.c	A more correct fix for PR standards/52282.	2017-07-11 19:36:38 +00:00
vfwscanf.c	…
vprintf.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
vscanf.c	fixes for GCC 6:	2018-02-04 01:13:45 +00:00
vsnprintf.c	…
vsnprintf_ss.c	…
vsprintf.c	…
vsscanf.c	…
vswprintf.c	…
vswscanf.c	…
vwprintf.c	…
vwscanf.c	…
wbuf.c	…
wcio.h	…
wprintf.3	…
wprintf.c	…
wscanf.3	…
wscanf.c	…
wsetup.c	…