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[PATCH] Fix the kernel panic of audit_filter_task when key field is set 

When calling audit_filter_task(), it calls audit_filter_rules() with audit_context is NULL.
If the key field is set, the result in audit_filter_rules() will be set to 1 and
ctx->filterkey will be set to key.
But the ctx is NULL in this condition, so kernel will panic.

Signed-off-by: Zhang Xiliang <zhangxiliang@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
zhangxiliang 2008-08-01 19:15:47 +08:00 committed by Al Viro
parent 036bbf76ad
commit 980dfb0db3
1 changed files with 1 additions and 1 deletions
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2
kernel/auditsc.c
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@ -610,7 +610,7 @@ static int audit_filter_rules(struct task_struct *tsk,
if (!result) if (!result)
return 0; return 0;
} }
if (rule->filterkey) if (rule->filterkey && ctx)
ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC); ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
switch (rule->action) { switch (rule->action) {
case AUDIT_NEVER: *state = AUDIT_DISABLED; break; case AUDIT_NEVER: *state = AUDIT_DISABLED; break;