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nfsd: fix NULL pointer dereference in cld_pipe_downcall

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If we find that "cup" is NULL in this case, then we obviously don't
want to dereference it. What we really want to print in this case
is the xid that we copied off earlier.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>
This commit is contained in:
Jeff Layton 2012-03-28 07:36:01 -04:00 • committed by J. Bruce Fields
commit 21f72c9f0a
1 changed files with 1 additions and 2 deletions
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3
fs/nfsd/nfs4recover.c
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@ -602,8 +602,7 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
/* couldn't find upcall? */
if (!cup) {
dprintk("%s: couldn't find upcall -- xid=%u\n", __func__,
cup->cu_msg.cm_xid);
dprintk("%s: couldn't find upcall -- xid=%u\n", __func__, xid);
return -EINVAL;
}