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linux-brain/drivers/net/wan
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Xie He e00c5b9eeb net: lapbether: Prevent racing when checking whether the netif is running 
[ Upstream commit 5acd0cfbfbb5a688da1bfb1a2152b0c855115a35 ]

There are two "netif_running" checks in this driver. One is in
"lapbeth_xmit" and the other is in "lapbeth_rcv". They serve to make
sure that the LAPB APIs called in these functions are called before
"lapb_unregister" is called by the "ndo_stop" function.

However, these "netif_running" checks are unreliable, because it's
possible that immediately after "netif_running" returns true, "ndo_stop"
is called (which causes "lapb_unregister" to be called).

This patch adds locking to make sure "lapbeth_xmit" and "lapbeth_rcv" can
reliably check and ensure the netif is running while doing their work.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-05-14 09:44:26 +02:00
..
lmc net: wan/lmc: unregister device when no matching device is found 2021-04-07 14:47:41 +02:00
.gitignore
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Kconfig wan: ds26522: select CONFIG_BITREVERSE 2021-01-17 14:05:37 +01:00
Makefile net: wan: wanxl: use $(M68KCC) instead of $(M68KAS) for rebuilding firmware 2020-08-26 10:40:46 +02:00
c101.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
cosa.c cosa: Add missing kfree in error path of cosa_write 2020-11-18 19:20:28 +01:00
cosa.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
dlci.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
farsync.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
farsync.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fsl_ucc_hdlc.c net: wan: fix error return code of uhdlc_init() 2021-03-30 14:35:21 +02:00
fsl_ucc_hdlc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hd64570.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
hd64570.h
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hd64572.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
hd64572.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hdlc.c net: hdlc: In hdlc_rcv, check to make sure dev is an HDLC device 2020-10-29 09:57:26 +01:00
hdlc_cisco.c drivers/net/wan/hdlc: Set skb->protocol before transmitting 2020-10-07 08:01:26 +02:00
hdlc_fr.c drivers/net/wan/hdlc_fr: Correctly handle special skb->protocol values 2020-11-05 11:43:19 +01:00
hdlc_ppp.c net: hdlc_ppp: Fix issues when mod_timer is called while timer is running 2021-01-12 20:16:15 +01:00
hdlc_raw.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
hdlc_raw_eth.c net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup 2020-10-29 09:57:26 +01:00
hdlc_x25.c drivers/net/wan: lapb: Corrected the usage of skb_cow 2020-08-05 09:59:51 +02:00
hostess_sv11.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ixp4xx_hss.c wan: ixp4xx_hss: fix compile-testing on 64-bit 2020-02-24 08:36:46 +01:00
lapbether.c net: lapbether: Prevent racing when checking whether the netif is running 2021-05-14 09:44:26 +02:00
n2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
pc300too.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
pci200syn.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
sbni.c net: wan: sbni: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-25 14:36:15 -08:00
sbni.h
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sdla.c net: wan: sdla: Fix cast from pointer to integer of different size 2020-02-01 09:34:45 +00:00
sealevel.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
slic_ds26522.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
slic_ds26522.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wanxl.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
wanxl.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
wanxlfw.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
wanxlfw.inc_shipped
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x25_asy.c drivers/net/wan/x25_asy: Fix to make it work 2020-07-31 18:39:30 +02:00
x25_asy.h
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z85230.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
z85230.h
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