mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 03:23:53 -04:00
cb39cf99d8
vsprintf() performs no bounds checking and can overflow - replace it
with the safer vsnprintf().
Also remove the useless '+ 1' that is a leftover of commit 66ed28ea09
("m68k: sun3: Remove unused vsprintf() return value in prom_printf()").
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://patch.msgid.link/20260117202152.1036278-2-thorsten.blum@linux.dev
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
56 lines
975 B
C
56 lines
975 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* printf.c: Internal prom library printf facility.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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/* This routine is internal to the prom library, no one else should know
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* about or use it! It's simple and smelly anyway....
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*/
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#include <linux/kernel.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#ifdef CONFIG_KGDB
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extern int kgdb_initialized;
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#endif
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static char ppbuf[1024];
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void
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prom_printf(char *fmt, ...)
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{
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va_list args;
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char ch, *bptr;
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va_start(args, fmt);
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#ifdef CONFIG_KGDB
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ppbuf[0] = 'O';
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vsnprintf(ppbuf + 1, sizeof(ppbuf) - 1, fmt, args);
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#else
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vsnprintf(ppbuf, sizeof(ppbuf), fmt, args);
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#endif
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bptr = ppbuf;
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#ifdef CONFIG_KGDB
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if (kgdb_initialized) {
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pr_info("kgdb_initialized = %d\n", kgdb_initialized);
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putpacket(bptr, 1);
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} else
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#else
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while((ch = *(bptr++)) != 0) {
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if(ch == '\n')
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prom_putchar('\r');
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prom_putchar(ch);
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}
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#endif
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va_end(args);
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return;
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}
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