fix oops in __audit_signal_info()
The check for audit_signals is misplaced and the check for audit_dummy_context() is missing; as the result, if we send a signal to auditd from task with NULL ->audit_context while we have audit_signals != 0 we end up with an oops. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1992,8 +1992,8 @@ int __audit_signal_info(int sig, struct task_struct *t)
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extern uid_t audit_sig_uid;
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extern u32 audit_sig_sid;
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if (audit_pid && t->tgid == audit_pid &&
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(sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1)) {
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if (audit_pid && t->tgid == audit_pid) {
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if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
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audit_sig_pid = tsk->pid;
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if (ctx)
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audit_sig_uid = ctx->loginuid;
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@ -2001,9 +2001,9 @@ int __audit_signal_info(int sig, struct task_struct *t)
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audit_sig_uid = tsk->uid;
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selinux_get_task_sid(tsk, &audit_sig_sid);
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}
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if (!audit_signals) /* audit_context checked in wrapper */
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if (!audit_signals || audit_dummy_context())
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return 0;
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}
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/* optimize the common case by putting first signal recipient directly
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* in audit_context */
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