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author | Peter Münster <pm@a16n.net> | 2024-04-24 15:51:52 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 16:17:13 +0200 |
commit | 1aeede3a0217741120725c4c9cebf039c6fff7ef (patch) | |
tree | b67475626e73e13bb3c123bb165f5aa88d2e430b | |
parent | f5417ff561b8ac9a7e53c747b8627a7ab58378ae (diff) | |
download | linux-stable-1aeede3a0217741120725c4c9cebf039c6fff7ef.tar.gz linux-stable-1aeede3a0217741120725c4c9cebf039c6fff7ef.tar.bz2 linux-stable-1aeede3a0217741120725c4c9cebf039c6fff7ef.zip |
net: b44: set pause params only when interface is up
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@vger.kernel.org
Reported-by: Peter Münster <pm@a16n.net>
Suggested-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Vaclav Svoboda <svoboda@neng.cz>
Tested-by: Peter Münster <pm@a16n.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Peter Münster <pm@a16n.net>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/87y192oolj.fsf@a16n.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/net/ethernet/broadcom/b44.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c index 7aeb2805fec4..e5f76f4fd537 100644 --- a/drivers/net/ethernet/broadcom/b44.c +++ b/drivers/net/ethernet/broadcom/b44.c @@ -2033,12 +2033,14 @@ static int b44_set_pauseparam(struct net_device *dev, 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); |