* [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash
@ 2021-06-25 20:23 Pavel Skripkin
2021-06-27 18:22 ` Cong Wang
2021-06-28 20:10 ` patchwork-bot+netdevbpf
0 siblings, 2 replies; 3+ messages in thread
From: Pavel Skripkin @ 2021-06-25 20:23 UTC (permalink / raw)
To: jhs, xiyou.wangcong, jiri, davem
Cc: netdev, linux-kernel, Pavel Skripkin, syzbot+1071ad60cd7df39fdadb
Syzbot reported warning in tcindex_alloc_perfect_hash. The problem
was in too big cp->hash, which triggers warning in kmalloc. Since
cp->hash comes from userspace, there is no need to warn if value
is not correct
Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-and-tested-by: syzbot+1071ad60cd7df39fdadb@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
---
net/sched/cls_tcindex.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index c4007b9cd16d..5b274534264c 100644
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -304,7 +304,7 @@ static int tcindex_alloc_perfect_hash(struct net *net, struct tcindex_data *cp)
int i, err = 0;
cp->perfect = kcalloc(cp->hash, sizeof(struct tcindex_filter_result),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (!cp->perfect)
return -ENOMEM;
--
2.32.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash
2021-06-25 20:23 [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash Pavel Skripkin
@ 2021-06-27 18:22 ` Cong Wang
2021-06-28 20:10 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: Cong Wang @ 2021-06-27 18:22 UTC (permalink / raw)
To: Pavel Skripkin
Cc: Jamal Hadi Salim, Jiri Pirko, David Miller,
Linux Kernel Network Developers, LKML,
syzbot+1071ad60cd7df39fdadb
On Fri, Jun 25, 2021 at 1:23 PM Pavel Skripkin <paskripkin@gmail.com> wrote:
>
> Syzbot reported warning in tcindex_alloc_perfect_hash. The problem
> was in too big cp->hash, which triggers warning in kmalloc. Since
> cp->hash comes from userspace, there is no need to warn if value
> is not correct
>
> Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
> Reported-and-tested-by: syzbot+1071ad60cd7df39fdadb@syzkaller.appspotmail.com
> Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Looks reasonable.
Acked-by: Cong Wang <cong.wang@bytedance.com>
Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash
2021-06-25 20:23 [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash Pavel Skripkin
2021-06-27 18:22 ` Cong Wang
@ 2021-06-28 20:10 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: patchwork-bot+netdevbpf @ 2021-06-28 20:10 UTC (permalink / raw)
To: Pavel Skripkin
Cc: jhs, xiyou.wangcong, jiri, davem, netdev, linux-kernel,
syzbot+1071ad60cd7df39fdadb
Hello:
This patch was applied to netdev/net.git (refs/heads/master):
On Fri, 25 Jun 2021 23:23:48 +0300 you wrote:
> Syzbot reported warning in tcindex_alloc_perfect_hash. The problem
> was in too big cp->hash, which triggers warning in kmalloc. Since
> cp->hash comes from userspace, there is no need to warn if value
> is not correct
>
> Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
> Reported-and-tested-by: syzbot+1071ad60cd7df39fdadb@syzkaller.appspotmail.com
> Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
>
> [...]
Here is the summary with links:
- net: sched: fix warning in tcindex_alloc_perfect_hash
https://git.kernel.org/netdev/net/c/3f2db250099f
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-06-28 20:10 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-25 20:23 [PATCH] net: sched: fix warning in tcindex_alloc_perfect_hash Pavel Skripkin
2021-06-27 18:22 ` Cong Wang
2021-06-28 20:10 ` patchwork-bot+netdevbpf
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.