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Proc locking to protect p_ucred while we obtain an additional reference.

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This commit is contained in:
John Baldwin 2001-01-23 22:38:15 +00:00
parent f5343b3219
commit 1aab03a584
1 changed files with 9 additions and 1 deletions
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10
sys/fs/hpfs/hpfs_vfsops.c
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@ -331,6 +331,9 @@ hpfs_mountfs(devvp, mp, argsp, p)
struct hpfsmount *hpmp;
struct buf *bp = NULL;
struct vnode *vp;
#if defined(__FreeBSD__)
struct ucred *uc;
#endif
dev_t dev = devvp->v_rdev;
dprintf(("hpfs_mountfs():\n"));
@ -353,7 +356,12 @@ hpfs_mountfs(devvp, mp, argsp, p)
#if defined(__FreeBSD__)
VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
PROC_LOCK(p);
uc = p->p_ucred;
crhold(uc);
PROC_UNLOCK(p);
error = vinvalbuf(devvp, V_SAVE, uc, p, 0, 0);
crfree(uc);
VOP__UNLOCK(devvp, 0, p);
#else
error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);