From: Jiunn Chang <c0d1n61at3@gmail.com>
To: skhan@linuxfoundation.org
Cc: linux-kernel-mentees@lists.linuxfoundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
davem@davemloft.net
Subject: [Linux-kernel-mentees][PATCH v2] packet: Fix undefined behavior in bit shift
Date: Wed, 26 Jun 2019 22:25:30 -0500 [thread overview]
Message-ID: <20190627032532.18374-2-c0d1n61at3@gmail.com> (raw)
In-Reply-To: <20190627010137.5612-1-c0d1n61at3@gmail.com>
Shifting signed 32-bit value by 31 bits is undefined. Changing most
significant bit to unsigned.
Changes included in v2:
- use subsystem specific subject lines
- CC required mailing lists
Signed-off-by: Jiunn Chang <c0d1n61at3@gmail.com>
---
include/uapi/linux/if_packet.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/if_packet.h b/include/uapi/linux/if_packet.h
index 467b654bd4c7..3d884d68eb30 100644
--- a/include/uapi/linux/if_packet.h
+++ b/include/uapi/linux/if_packet.h
@@ -123,7 +123,7 @@ struct tpacket_auxdata {
/* Rx and Tx ring - header status */
#define TP_STATUS_TS_SOFTWARE (1 << 29)
#define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */
-#define TP_STATUS_TS_RAW_HARDWARE (1 << 31)
+#define TP_STATUS_TS_RAW_HARDWARE (1U << 31)
/* Rx ring - feature request bits */
#define TP_FT_REQ_FILL_RXHASH 0x1
--
2.22.0
next parent reply other threads:[~2019-06-27 3:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190627010137.5612-1-c0d1n61at3@gmail.com>
2019-06-27 3:25 ` Jiunn Chang [this message]
2019-06-27 3:32 ` [Linux-kernel-mentees][PATCH v2] packet: Fix undefined behavior in bit shift Shuah Khan
2019-06-27 16:22 ` David Miller
2019-06-27 16:52 ` Shuah Khan
2019-06-27 17:05 ` Alexei Starovoitov
2019-06-27 17:08 ` Shuah Khan
2019-06-27 16:57 ` Jiunn Chang
2019-06-27 17:34 ` David Miller
2019-06-27 5:04 ` [Linux-kernel-mentees][PATCH v3] " Jiunn Chang
2019-06-29 18:06 ` [Linux-kernel-mentees][PATCH v2] " David Miller
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