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selinux: fix potential counting error in avc_add_xperms_decision()

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commit 379d9af3f3da2da1bbfa67baf1820c72a080d1f1 upstream.

The count increases only when a node is successfully added to
the linked list.

Cc: stable@vger.kernel.org
Fixes: fa1aa143ac4a ("selinux: extended permissions for ioctls")
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 5d93f05ed258c92a8925b74bc36101af36c22732)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
This commit is contained in:
Zhen Lei 2024-08-06 14:51:13 +08:00 committed by Vegard Nossum
parent 90707a9e8c
commit e12d520dc1
1 changed files with 1 additions and 1 deletions
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2
security/selinux/avc.c
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@ -381,12 +381,12 @@ static int avc_add_xperms_decision(struct avc_node *node,
{
struct avc_xperms_decision_node *dest_xpd;
node->ae.xp_node->xp.len++;
dest_xpd = avc_xperms_decision_alloc(src->used);
if (!dest_xpd)
return -ENOMEM;
avc_copy_xperms_decision(&dest_xpd->xpd, src);
list_add(&dest_xpd->xpd_list, &node->ae.xp_node->xpd_head);
node->ae.xp_node->xp.len++;
return 0;
}