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Get pointer to devfs_ruleset struct after garbage collection has been

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performed. Otherwise if ruleset is used by given mountpoint and is empty
it's freed by devfs_ruleset_reap and pointer becomes bogus.

Submitted by:   Mateusz Guzik <mjguzik@gmail.com>
PR:             kern/124853
This commit is contained in:
Oleksandr Tymoshenko 2008-06-22 14:34:38 +00:00
parent ccb1212a56
commit 2da528a74f
1 changed files with 3 additions and 3 deletions
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6
sys/fs/devfs/devfs_rule.c
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@ -735,15 +735,15 @@ devfs_ruleset_use(devfs_rsnum rsnum, struct devfs_mount *dm)
{
struct devfs_ruleset *cds, *ds;
ds = devfs_ruleset_bynum(rsnum);
if (ds == NULL)
ds = devfs_ruleset_create(rsnum);
if (dm->dm_ruleset != 0) {
cds = devfs_ruleset_bynum(dm->dm_ruleset);
--cds->ds_refcount;
devfs_ruleset_reap(cds);
}
ds = devfs_ruleset_bynum(rsnum);
if (ds == NULL)
ds = devfs_ruleset_create(rsnum);
/* These should probably be made atomic somehow. */
++ds->ds_refcount;
dm->dm_ruleset = rsnum;