From: Vasily Averin vvs@virtuozzo.com
[ Upstream commit a3ea86739f1bc7e121d921842f0f4a8ab1af94d9 ]
if seq_file .next fuction does not change position index, read after some lseek can generate unexpected output.
https://bugzilla.kernel.org/show_bug.cgi?id=206283 Signed-off-by: Vasily Averin vvs@virtuozzo.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/route.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 542f6e0f438f1..ea1c319100a5d 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -271,6 +271,7 @@ static void *rt_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) *pos = cpu+1; return &per_cpu(rt_cache_stat, cpu); } + (*pos)++; return NULL;
}