[PATCH net] net: pktgen: Fix interface flags printing

[PATCH net] net: pktgen: Fix interface flags printing

[Gavrilov Ilia]

Device flags are displayed incorrectly:
1) The comparison (i == F_FLOW_SEQ) is always false, because F_FLOW_SEQ
is equal to (1 << FLOW_SEQ_SHIFT) == 2048, and the maximum value
of the 'i' variable is (NR_PKT_FLAG - 1) == 17. It should be compared
with FLOW_SEQ_SHIFT.

2) Similarly to the F_IPSEC flag.

3) Also add spaces to the print end of the string literal "spi:%u"
to prevent the output from merging with the flag that follows.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Fixes: 99c6d3d20d62 ("pktgen: Remove brute-force printing of flags")
Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@infotecs.ru>
---
 net/core/pktgen.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index f56b8d697014..4d1696677c48 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -669,19 +669,19 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
 	seq_puts(seq, "     Flags: ");
 
 	for (i = 0; i < NR_PKT_FLAGS; i++) {
-		if (i == F_FLOW_SEQ)
+		if (i == FLOW_SEQ_SHIFT)
 			if (!pkt_dev->cflows)
 				continue;
 
-		if (pkt_dev->flags & (1 << i))
+		if (pkt_dev->flags & (1 << i)) {
 			seq_printf(seq, "%s  ", pkt_flag_names[i]);
-		else if (i == F_FLOW_SEQ)
-			seq_puts(seq, "FLOW_RND  ");
-
 #ifdef CONFIG_XFRM
-		if (i == F_IPSEC && pkt_dev->spi)
-			seq_printf(seq, "spi:%u", pkt_dev->spi);
+			if (i == IPSEC_SHIFT && pkt_dev->spi)
+				seq_printf(seq, "spi:%u  ", pkt_dev->spi);
 #endif
+		} else if (i == FLOW_SEQ_SHIFT) {
+			seq_puts(seq, "FLOW_RND  ");
+		}
 	}
 
 	seq_puts(seq, "\n");
-- 
2.39.2

Re: [PATCH net] net: pktgen: Fix interface flags printing

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@davemloft.net>:

On Mon, 16 Oct 2023 14:08:59 +0000 you wrote:
> Device flags are displayed incorrectly:
> 1) The comparison (i == F_FLOW_SEQ) is always false, because F_FLOW_SEQ
> is equal to (1 << FLOW_SEQ_SHIFT) == 2048, and the maximum value
> of the 'i' variable is (NR_PKT_FLAG - 1) == 17. It should be compared
> with FLOW_SEQ_SHIFT.
> 
> 2) Similarly to the F_IPSEC flag.
> 
> [...]

Here is the summary with links:
  - [net] net: pktgen: Fix interface flags printing
    https://git.kernel.org/netdev/net/c/1d30162f35c7

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html