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Change O_BENEATH to handle relative paths same as absolute.

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Do not care if path walks out of the topping directory if it returns back.

Requested and reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D25886
This commit is contained in:
Konstantin Belousov 2020-09-22 22:43:32 +00:00
parent 07e7ad2b98
commit 6a9c72d901
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366021
1 changed files with 6 additions and 4 deletions
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10
sys/kern/vfs_lookup.c
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@ -178,11 +178,13 @@ static void
nameicap_tracker_add(struct nameidata *ndp, struct vnode *dp)
{
struct nameicap_tracker *nt;
struct componentname *cnp;
if ((ndp->ni_lcf & NI_LCF_CAP_DOTDOT) == 0 || dp->v_type != VDIR)
return;
if ((ndp->ni_lcf & (NI_LCF_BENEATH_ABS | NI_LCF_BENEATH_LATCHED)) ==
NI_LCF_BENEATH_ABS) {
cnp = &ndp->ni_cnd;
if ((cnp->cn_flags & BENEATH) != 0 &&
(ndp->ni_lcf & NI_LCF_BENEATH_LATCHED) == 0) {
MPASS((ndp->ni_lcf & NI_LCF_LATCH) != 0);
if (dp != ndp->ni_beneath_latch)
return;
@ -593,8 +595,8 @@ namei(struct nameidata *ndp)
namei_cleanup_cnp(cnp);
} else
cnp->cn_flags |= HASBUF;
if ((ndp->ni_lcf & (NI_LCF_BENEATH_ABS |
NI_LCF_BENEATH_LATCHED)) == NI_LCF_BENEATH_ABS) {
if ((ndp->ni_lcf & (NI_LCF_LATCH |
NI_LCF_BENEATH_LATCHED)) == NI_LCF_LATCH) {
NDFREE(ndp, 0);
error = ENOTCAPABLE;
}