Author: markj
Date: Mon Oct 7 14:46:23 2019
New Revision: 353276
URL: https://svnweb.freebsd.org/changeset/base/353276
Log:
MFC r353010:
Disallow fcntl(F_READAHEAD) when the vnode is not a regular file.
Modified:
stable/12/sys/kern/kern_descrip.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/kern/kern_descrip.c
==============================================================================
--- stable/12/sys/kern/kern_descrip.c Mon Oct 7 14:24:59 2019
(r353275)
+++ stable/12/sys/kern/kern_descrip.c Mon Oct 7 14:46:23 2019
(r353276)
@@ -770,6 +770,12 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_
break;
}
vp = fp->f_vnode;
+ if (vp->v_type != VREG) {
+ fdrop(fp, td);
+ error = ENOTTY;
+ break;
+ }
+
/*
* Exclusive lock synchronizes against f_seqcount reads and
* writes in sequential_heuristic().
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