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[PARISC] fix null ptr deref in unwind.c

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commit ffb4512276 removed one too many args.
kallsyms_lookup is not safe to call with a NULL *modname. Paper bag over the
problem for the time being.

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Kyle McMartin 2007-05-30 02:24:28 -04:00 committed by Kyle McMartin
parent 516a949115
commit cb9577958d
1 changed files with 3 additions and 1 deletions
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4
arch/parisc/kernel/unwind.c
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@ -216,8 +216,10 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
/* Handle some frequent special cases.... */ /* Handle some frequent special cases.... */
{ {
char symname[KSYM_NAME_LEN+1]; char symname[KSYM_NAME_LEN+1];
char *modname;
kallsyms_lookup(info->ip, NULL, NULL, NULL, symname); kallsyms_lookup(info->ip, NULL, NULL, &modname,
symname);
dbg("info->ip = 0x%lx, name = %s\n", info->ip, symname); dbg("info->ip = 0x%lx, name = %s\n", info->ip, symname);