Patch "staging: rtl8192u: Do not use GFP_KERNEL in atomic context" has been added to the 5.9-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    staging: rtl8192u: Do not use GFP_KERNEL in atomic context

to the 5.9-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:
     staging-rtl8192u-do-not-use-gfp_kernel-in-atomic-con.patch
and it can be found in the queue-5.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9ab24a567ce08ae5e99fb57b409ad02c2b172033
Author: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date:   Thu Aug 13 19:34:58 2020 +0200

    staging: rtl8192u: Do not use GFP_KERNEL in atomic context
    
    [ Upstream commit acac75bb451fd39344eb54fad6602dfc9482e970 ]
    
    'rtl8192_irq_rx_tasklet()' is a tasklet initialized in
    'rtl8192_init_priv_task()'.
    >From this function it is possible to allocate some memory with the
    GFP_KERNEL flag, which is not allowed in the atomic context of a tasklet.
    
    Use GFP_ATOMIC instead.
    
    The call chain is:
      rtl8192_irq_rx_tasklet            (in r8192U_core.c)
        --> rtl8192_rx_nomal            (in r8192U_core.c)
          --> ieee80211_rx              (in ieee80211/ieee80211_rx.c)
            --> RxReorderIndicatePacket (in ieee80211/ieee80211_rx.c)
    
    Fixes: 79a5ccd97209 ("staging: rtl8192u: fix large frame size compiler warning")
    Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20200813173458.758284-1-christophe.jaillet@xxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
index 195d963c4fbb4..b6fee7230ce05 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
@@ -597,7 +597,7 @@ static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
 
 	prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
 					  sizeof(struct ieee80211_rxb *),
-					  GFP_KERNEL);
+					  GFP_ATOMIC);
 	if (!prxbIndicateArray)
 		return;