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Don't follow smbnode n_parent pointer when NREFPARENT flag is not set

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in smb_fphelp(): the parent vnode may have already been recycled
since we don't hold a reference to it. Fixes a panic when rebooting
with mdconfig -t vnode devices referring to vnodes on a smbfs mount.
This commit is contained in:
Tim J. Robbins 2003-06-14 15:24:54 +00:00
parent 33ffdd8115
commit 35c5de54e8
1 changed files with 2 additions and 0 deletions
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2
sys/fs/smbfs/smbfs_subr.c
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@ -270,6 +270,8 @@ smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np,
return ENAMETOOLONG;
}
*npp++ = np;
if ((np->n_flag & NREFPARENT) == 0)
break;
np = VTOSMB(np->n_parent);
}
/* if (i == 0)