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Revert r210194, adding a comment explaining why calls to chgproccnt()

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in unionfs are actually needed.  I have a better fix in trasz_hrl p4 branch,
but now is not a good moment to commit it.

Reported by:	Alex Kozlov
This commit is contained in:
Edward Tomasz Napierala 2010-08-25 21:32:08 +00:00
parent db1cea00ad
commit 81f6480d42
1 changed files with 6 additions and 0 deletions
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6
sys/fs/unionfs/union_subr.c
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@ -775,6 +775,11 @@ unionfs_mkshadowdir(struct unionfs_mount *ump, struct vnode *udvp,
/* Authority change to root */
rootinfo = uifind((uid_t)0);
cred = crdup(cnp->cn_cred);
/*
* The calls to chgproccnt() are needed to compensate for change_ruid()
* calling chgproccnt().
*/
chgproccnt(cred->cr_ruidinfo, 1, 0);
change_euid(cred, rootinfo);
change_ruid(cred, rootinfo);
change_svuid(cred, (uid_t)0);
@ -824,6 +829,7 @@ unionfs_mkshadowdir_free_out:
unionfs_mkshadowdir_abort:
cnp->cn_cred = credbk;
chgproccnt(cred->cr_ruidinfo, -1, 0);
crfree(cred);
return (error);