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Avoid a panic in __getcwd(2) when combined with umount -f.

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This commit is contained in:
Peter Wemm 2000-02-14 06:09:01 +00:00
parent 1e2901e23b
commit 194a0b6c97
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=57199
1 changed files with 2 additions and 0 deletions
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sys/kern/vfs_cache.c
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@ -535,6 +535,8 @@ __getcwd(p, uap)
slash_prefixed = 0;
for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
if (vp->v_flag & VROOT) {
if (vp->v_mount == NULL) /* forced unmount */
return (EBADF);
vp = vp->v_mount->mnt_vnodecovered;
continue;
}