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net: pktgen: Fix interface flags printing

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commit 1d30162f35 upstream.

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: 99c6d3d20d ("pktgen: Remove brute-force printing of flags")
Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@infotecs.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gavrilov Ilia 2023-10-16 14:08:59 +00:00 committed by Greg Kroah-Hartman
parent cee9ea14c8
commit d6878d39b6
1 changed files with 7 additions and 7 deletions
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14
net/core/pktgen.c
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@ -645,19 +645,19 @@ 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");