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40c575d1ec
linux/net/wireless
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Johannes Berg 40c575d1ec cfg80211: fix netdev registration deadlock 
If register_netdevice() fails after having called cfg80211's
netdev notifier (cfg80211_netdev_notifier_call) it will call
the notifier again with UNREGISTER. This would then lock the
wiphy mutex because we're marked as registered, which causes
a deadlock.

Fix this by separately keeping track of whether or not we're
in the middle of registering to also skip the notifier call
on this unregister.

Reported-by: syzbot+2ae0ca9d7737ad1a62b7@syzkaller.appspotmail.com
Fixes: a05829a722 ("cfg80211: avoid holding the RTNL when calling the driver")
Link: https://lore.kernel.org/r/20210201192048.ed8bad436737.I7cae042c44b15f80919a285799a15df467e9d42d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2021-02-01 19:30:54 +01:00
..
certs cfg80211: ship certificates as hex files 2017-12-19 09:28:01 +01:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
ap.c cfg80211: call disconnect_wk when AP stops 2019-02-01 11:12:50 +01:00
chan.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
core.c cfg80211: fix netdev registration deadlock 2021-02-01 19:30:54 +01:00
core.h cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
debugfs.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ethtool.c cfg80211: check wiphy driver existence for drvinfo report 2020-02-07 12:53:26 +01:00
ibss.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
Kconfig cfg80211: select CONFIG_CRC32 2021-01-05 15:50:36 -08:00
lib80211_crypt_ccmp.c lib80211: use crypto API ccm(aes) transform for CCMP processing 2019-07-26 13:22:47 +02:00
lib80211_crypt_tkip.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
lib80211_crypt_wep.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
lib80211.c lib80211: Remove unused macro DRV_NAME 2020-09-18 11:53:00 +02:00
Makefile wireless: Skip directory when generating certificates 2019-05-14 10:27:57 +02:00
mesh.c cfg80211/mac80211: add mesh_param "mesh_nolearn" to skip path discovery 2020-07-31 09:24:23 +02:00
mlme.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
nl80211.c nl80211: call cfg80211_dev_rename() under RTNL 2021-01-28 19:10:38 +01:00
nl80211.h cfg80211: support immediate reconnect request hint 2020-12-11 13:20:05 +01:00
ocb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
of.c cfg80211: support ieee80211-freq-limit DT property 2017-01-06 14:01:13 +01:00
pmsr.c nl80211: link recursive netlink nested policy 2020-04-30 17:51:41 -07:00
radiotap.c wireless: radiotap: fix some kernel-doc 2020-09-28 13:53:05 +02:00
rdev-ops.h nl80211: add common API to configure SAR power limitations 2020-12-11 13:38:54 +01:00
reg.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
reg.h cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
scan.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
sme.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
sysfs.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
sysfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.c
trace.h nl80211: add common API to configure SAR power limitations 2020-12-11 13:38:54 +01:00
util.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
wext-compat.c wext: call cfg80211_set_encryption() with wiphy lock held 2021-01-28 19:10:57 +01:00
wext-compat.h treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
wext-core.c wireless: wext: avoid gcc -O3 warning 2020-01-15 09:52:20 +01:00
wext-priv.c
wext-proc.c proc: introduce proc_create_net{,_data} 2018-05-16 07:24:30 +02:00
wext-sme.c cfg80211: avoid holding the RTNL when calling the driver 2021-01-26 11:55:50 +01:00
wext-spy.c