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    SubjectRe: [PATCH 4.19 13/99] netfilter: nf_conncount: fix argument order to find_next_bit
    Date
    Hello!

    Since 4.19.17, I'm facing problems during streaming of videos I've never seen before. This means:

    - video from internet stutters although enough data flow can be seen in bmon.
    - gpu is locked:
    radeon 0000:0a:00.0: ring 0 stalled for more than 14084msec
    radeon 0000:0a:00.0: GPU lockup (current fence id 0x0000000000053ed7 last fence id 0x0000000000053f0f on ring 0)
    - The connection of videos streamed locally by the machine for a TV suddenly breaks (upnp - serviio as server).

    After very long time of testing, I detected, that removing the complete patch series for 4.19.17 regarding netfilter: nf_conncount makes the problem disappear.

    Please remove / fix this patchset!


    Thanks
    Andreas Hartmann


    On 21.01.19 at 14:48 Greg Kroah-Hartman wrote:
    > 4.19-stable review patch. If anyone has any objections, please let me know.
    >
    > ------------------
    >
    > From: Florian Westphal <fw@strlen.de>
    >
    > commit a007232066f6839d6f256bab21e825d968f1a163 upstream.
    >
    > Size and 'next bit' were swapped, this bug could cause worker to
    > reschedule itself even if system was idle.
    >
    > Fixes: 5c789e131cbb9 ("netfilter: nf_conncount: Add list lock and gc worker, and RCU for init tree search")
    > Reviewed-by: Shawn Bohrer <sbohrer@cloudflare.com>
    > Signed-off-by: Florian Westphal <fw@strlen.de>
    > Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    >
    > ---
    > net/netfilter/nf_conncount.c | 2 +-
    > 1 file changed, 1 insertion(+), 1 deletion(-)
    >
    > --- a/net/netfilter/nf_conncount.c
    > +++ b/net/netfilter/nf_conncount.c
    > @@ -488,7 +488,7 @@ next:
    > clear_bit(tree, data->pending_trees);
    >
    > next_tree = (tree + 1) % CONNCOUNT_SLOTS;
    > - next_tree = find_next_bit(data->pending_trees, next_tree, CONNCOUNT_SLOTS);
    > + next_tree = find_next_bit(data->pending_trees, CONNCOUNT_SLOTS, next_tree);
    >
    > if (next_tree < CONNCOUNT_SLOTS) {
    > data->gc_tree = next_tree;
    >
    >
    >



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