Change fifo_printinfo to check if the vnode v_fifoinfo pointer

is NULL and print a message to that effect to prevent a panic.

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/fs/fifofs/fifo_vnops.c b/sys/fs/fifofs/fifo_vnops.c
index 6947c47..9d9ee62 100644
--- a/sys/fs/fifofs/fifo_vnops.c
+++ b/sys/fs/fifofs/fifo_vnops.c
@@ -447,6 +447,10 @@ fifo_printinfo(vp)
 {
 	register struct fifoinfo *fip = vp->v_fifoinfo;
 
+	if (fip == NULL){
+		printf(", NULL v_fifoinfo");
+		return (0);
+	}
 	printf(", fifo with %ld readers and %ld writers",
 		fip->fi_readers, fip->fi_writers);
 	return (0);