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Avoid panics from recursive rename operations. Not a perfect patch but

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good enough for now.

PR:		kern/159418
Submitted by:	Gleb Kurtsou
Reviewed by:	kib
MFC after:	1 month
This commit is contained in:
Ivan Voras 2011-11-22 16:18:12 +00:00
parent 2013459487
commit 6e92aee4e2
1 changed files with 3 additions and 6 deletions
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9
sys/fs/tmpfs/tmpfs_vnops.c
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@ -965,11 +965,8 @@ tmpfs_rename(struct vop_rename_args *v)
/* If we need to move the directory between entries, lock the
* source so that we can safely operate on it. */
if (tdvp != fdvp) {
error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
if (error != 0)
goto out;
}
if (fdvp != tdvp && fdvp != tvp)
vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
fdnode = VP_TO_TMPFS_DIR(fdvp);
fnode = VP_TO_TMPFS_NODE(fvp);
de = tmpfs_dir_lookup(fdnode, fnode, fcnp);
@ -1143,7 +1140,7 @@ tmpfs_rename(struct vop_rename_args *v)
error = 0;
out_locked:
if (fdnode != tdnode)
if (fdvp != tdvp && fdvp != tvp)
VOP_UNLOCK(fdvp, 0);
out: