This is a note to let you know that I've just added the patch titled net: macb: fix the restore of cmp registers to the 5.11-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-macb-fix-the-restore-of-cmp-registers.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a714e27ea8bdee2b238748029d31472d0a65b611 Mon Sep 17 00:00:00 2001 From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> Date: Wed, 14 Apr 2021 14:20:29 +0300 Subject: net: macb: fix the restore of cmp registers From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> commit a714e27ea8bdee2b238748029d31472d0a65b611 upstream. Commit a14d273ba159 ("net: macb: restore cmp registers on resume path") introduces the restore of CMP registers on resume path. In case the IP doesn't support type 2 screeners (zero on DCFG8 register) the struct macb::rx_fs_list::list is not initialized and thus the list_for_each_entry(item, &bp->rx_fs_list.list, list) loop introduced in commit a14d273ba159 ("net: macb: restore cmp registers on resume path") will access an uninitialized list leading to crash. Thus, initialize the struct macb::rx_fs_list::list without taking into account if the IP supports type 2 screeners or not. Fixes: a14d273ba159 ("net: macb: restore cmp registers on resume path") Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/cadence/macb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -3914,6 +3914,7 @@ static int macb_init(struct platform_dev reg = gem_readl(bp, DCFG8); bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3), GEM_BFEXT(T2SCR, reg)); + INIT_LIST_HEAD(&bp->rx_fs_list.list); if (bp->max_tuples > 0) { /* also needs one ethtype match to check IPv4 */ if (GEM_BFEXT(SCR2ETH, reg) > 0) { @@ -3924,7 +3925,6 @@ static int macb_init(struct platform_dev /* Filtering is supported in hw but don't enable it in kernel now */ dev->hw_features |= NETIF_F_NTUPLE; /* init Rx flow definitions */ - INIT_LIST_HEAD(&bp->rx_fs_list.list); bp->rx_fs_list.count = 0; spin_lock_init(&bp->rx_fs_lock); } else Patches currently in stable-queue which might be from claudiu.beznea@xxxxxxxxxxxxx are queue-5.11/net-macb-fix-the-restore-of-cmp-registers.patch