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o Make kqueue's filt_procattach() function use the error value returned

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by p_can(...P_CAN_SEE), rather than returning EACCES directly.  This
  brings the error code used here into line with similar arrangements
  elsewhere, and prevents the leakage of pid usage information.

Reviewed by:	jlemon
Obtained from:	TrustedBSD Project
This commit is contained in:
Robert Watson 2001-04-12 21:32:02 +00:00
parent d34f8d3030
commit e386f9bda3
1 changed files with 3 additions and 2 deletions
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5
sys/kern/kern_event.c
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@ -165,12 +165,13 @@ static int
filt_procattach(struct knote *kn)
{
struct proc *p;
int error;
p = pfind(kn->kn_id);
if (p == NULL)
return (ESRCH);
if (p_can(curproc, p, P_CAN_SEE, NULL))
return (EACCES);
if ((error = p_can(curproc, p, P_CAN_SEE, NULL)))
return (error);
kn->kn_ptr.p_proc = p;
kn->kn_flags |= EV_CLEAR; /* automatically set */