mirrors/hekate
1
0
Fork 0
mirror of https://github.com/CTCaer/hekate.git synced 2024-11-09 20:11:50 +00:00
Code Issues Releases Activity

bdk: fatfs: check if string is null for puts/printf

Browse source 
Avoid writing garbage to a file by checking string pointer passed to f_puts and f_printf.

Important on many embedded platforms that do not abort on NULL dereference.
This commit is contained in:
CTCaer 2021-10-01 14:27:57 +03:00
parent e31d6446db
commit 99d15eaac8
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
bdk/libs/fatfs/ff.c
View file

@ -4712,9 +4712,9 @@ DWORD *f_expand_cltbl (
}
if (f_lseek(fp, CREATE_LINKMAP)) { /* Create cluster link table */
ff_memfree(fp->cltbl);
fp->cltbl = NULL;
fp->cltbl = (void *)0;
EFSPRINTF("CLTBLSZ");
return NULL;
return (void *)0;
}
f_lseek(fp, 0);
@ -6737,6 +6737,8 @@ int f_puts (
putbuff pb;
if (str == (void *)0) return EOF; /* String is NULL */
putc_init(&pb, fp);
while (*str) putc_bfd(&pb, *str++); /* Put the string */
return putc_flush(&pb);
@ -6763,6 +6765,8 @@ int f_printf (
TCHAR c, d, str[32], *p;
if (fmt == (void *)0) return EOF; /* String is NULL */
putc_init(&pb, fp);
va_start(arp, fmt);