This is a note to let you know that I've just added the patch titled
net: b44: set pause params only when interface is up
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-b44-set-pause-params-only-when-interface-is-up.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3eb7dd47bd4806f00e104eb6da092c435f9fb21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20M=C3=BCnster?= <pm@xxxxxxxx>
Date: Wed, 24 Apr 2024 15:51:52 +0200
Subject: net: b44: set pause params only when interface is up
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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From: Peter Münster <pm@xxxxxxxx>
commit e3eb7dd47bd4806f00e104eb6da092c435f9fb21 upstream.
b44_free_rings() accesses b44::rx_buffers (and ::tx_buffers)
unconditionally, but b44::rx_buffers is only valid when the
device is up (they get allocated in b44_open(), and deallocated
again in b44_close()), any other time these are just a NULL pointers.
So if you try to change the pause params while the network interface
is disabled/administratively down, everything explodes (which likely
netifd tries to do).
Link: https://github.com/openwrt/openwrt/issues/13789
Fixes: 1da177e4c3f4 (Linux-2.6.12-rc2)
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Peter Münster <pm@xxxxxxxx>
Suggested-by: Jonas Gorski <jonas.gorski@xxxxxxxxx>
Signed-off-by: Vaclav Svoboda <svoboda@xxxxxxx>
Tested-by: Peter Münster <pm@xxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Peter Münster <pm@xxxxxxxx>
Reviewed-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/87y192oolj.fsf@xxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/broadcom/b44.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/broadcom/b44.c
+++ b/drivers/net/ethernet/broadcom/b44.c
@@ -2029,12 +2029,14 @@ static int b44_set_pauseparam(struct net
bp->flags |= B44_FLAG_TX_PAUSE;
else
bp->flags &= ~B44_FLAG_TX_PAUSE;
- if (bp->flags & B44_FLAG_PAUSE_AUTO) {
- b44_halt(bp);
- b44_init_rings(bp);
- b44_init_hw(bp, B44_FULL_RESET);
- } else {
- __b44_set_flow_ctrl(bp, bp->flags);
+ if (netif_running(dev)) {
+ if (bp->flags & B44_FLAG_PAUSE_AUTO) {
+ b44_halt(bp);
+ b44_init_rings(bp);
+ b44_init_hw(bp, B44_FULL_RESET);
+ } else {
+ __b44_set_flow_ctrl(bp, bp->flags);
+ }
}
spin_unlock_irq(&bp->lock);
Patches currently in stable-queue which might be from pm@xxxxxxxx are
queue-5.15/net-b44-set-pause-params-only-when-interface-is-up.patch
