X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..c18c124eaa464aaaa5549e99e5a70fc9cbb50944:/bsd/kern/tty_subr.c?ds=sidebyside

diff --git a/bsd/kern/tty_subr.c b/bsd/kern/tty_subr.c
index c2abc010d..89bc09fe0 100644
--- a/bsd/kern/tty_subr.c
+++ b/bsd/kern/tty_subr.c
@@ -340,7 +340,9 @@ clrbits(u_char *cp, int off, int len)
 		cp[sby++] &= mask;
 
 		mask = (1<<ebi) - 1;
-		cp[eby] &= ~mask;
+		/* handle remainder bits, if any, for a non-0 ebi value */
+		if (mask)
+			cp[eby] &= ~mask;
 
 		for (i = sby; i < eby; i++)
 			cp[i] = 0x00;