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Ensure we have obtained a lock on the process before calling

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mac_veriexec_get_executable_flags(). Only try locking/unlocking if the caller
has not already acquired the process lock.

Obtained from:	Juniper Networks, Inc.
MFC after:	1 week
This commit is contained in:
Stephen J. Kiernan 2019-05-17 17:50:01 +00:00
parent 949f834a61
commit 3da3012ace
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=347933
1 changed files with 10 additions and 1 deletions
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11
sys/security/mac_veriexec/mac_veriexec.c
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@ -823,10 +823,19 @@ mac_veriexec_set_state(int state)
int
mac_veriexec_proc_is_trusted(struct ucred *cred, struct proc *p)
{
int error, flags;
int already_locked, error, flags;
/* Make sure we lock the process if we do not already have the lock */
already_locked = PROC_LOCKED(p);
if (!already_locked)
PROC_LOCK(p);
error = mac_veriexec_metadata_get_executable_flags(cred, p, &flags, 0);
/* Unlock the process if we locked it previously */
if (!already_locked)
PROC_UNLOCK(p);
/* Any errors, deny access */
if (error != 0)
return (0);