bisecting cause commit starting from d1f3bdd4eaae1222063c2f309625656108815915
building syzkaller on eefc07f2541beeb1bcd50b1d75f40b5f04af2b06
testing commit d1f3bdd4eaae1222063c2f309625656108815915 with gcc (GCC) 8.1.0
kernel signature: 721ed5151b1a2c0946e6451b1749283ad4e979493f4da013ce171205d6146190
all runs: crashed: WARNING in _cfg80211_unregister_wdev
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 8.1.0
kernel signature: 0ac21c7bec8a01fc2233fe2faf9cb6641f5d6068f7226445cdb28206bf6f01d9
all runs: OK
# git bisect start d1f3bdd4eaae1222063c2f309625656108815915 2c85ebc57b3e1817b6ce1a6b703928e113a90442
Bisecting: 7448 revisions left to test after this (roughly 13 steps)
[ee249d30fadec7677364063648f5547e243bf93f] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

testing commit ee249d30fadec7677364063648f5547e243bf93f with gcc (GCC) 8.1.0
kernel signature: de197b366bb3f34b507f345929fc710c32f5cb7d5e8f7144f9f31936311554c1
all runs: OK
# git bisect good ee249d30fadec7677364063648f5547e243bf93f
Bisecting: 3713 revisions left to test after this (roughly 12 steps)
[09c0796adf0c793462fda1d7c8c43324551405c7] Merge tag 'trace-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

testing commit 09c0796adf0c793462fda1d7c8c43324551405c7 with gcc (GCC) 8.1.0
kernel signature: 4296d94fb0659eee6c6bf982a0c15c09a903dbdd8f8f5a1d6fea9e9588c970af
all runs: OK
# git bisect good 09c0796adf0c793462fda1d7c8c43324551405c7
Bisecting: 1859 revisions left to test after this (roughly 11 steps)
[60e8edd2513abffdb6d4a9b5affca7f9dd5ec73d] Merge tag 'io_uring-5.11-2020-12-23' of git://git.kernel.dk/linux-block

testing commit 60e8edd2513abffdb6d4a9b5affca7f9dd5ec73d with gcc (GCC) 8.1.0
kernel signature: f2429247c95e70b8910b517ae2c280971a6898e6a393a9cadaaaf9c07463e6ac
all runs: OK
# git bisect good 60e8edd2513abffdb6d4a9b5affca7f9dd5ec73d
Bisecting: 916 revisions left to test after this (roughly 10 steps)
[e8c13a6bc8ebbef7bd099ec1061633d1c9c94d5b] Merge tag 'net-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

testing commit e8c13a6bc8ebbef7bd099ec1061633d1c9c94d5b with gcc (GCC) 8.1.0
kernel signature: 15c99d33711df7905c03f011fda7d0178fe9183dbd3e6598ad74b31024dd65b4
all runs: OK
# git bisect good e8c13a6bc8ebbef7bd099ec1061633d1c9c94d5b
Bisecting: 494 revisions left to test after this (roughly 9 steps)
[7b8fc0103bb51d1d3e1fb5fd67958612e709f883] bonding: add a vlan+srcmac tx hashing option

testing commit 7b8fc0103bb51d1d3e1fb5fd67958612e709f883 with gcc (GCC) 8.1.0
kernel signature: ec08cbfad50ed9092120c366cad8366b27d3bfd115ecf7579797fd4f2cdece30
all runs: OK
# git bisect good 7b8fc0103bb51d1d3e1fb5fd67958612e709f883
Bisecting: 270 revisions left to test after this (roughly 8 steps)
[2e4ceed606ba4942f632d097f70696543fe98d8e] Merge tag 'for-linus-5.11-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

testing commit 2e4ceed606ba4942f632d097f70696543fe98d8e with gcc (GCC) 8.1.0
kernel signature: 492bb8d0e2968b6d6e7024d4e5a20ed54275c7586f6ab612650571cf1ef03a20
all runs: OK
# git bisect good 2e4ceed606ba4942f632d097f70696543fe98d8e
Bisecting: 134 revisions left to test after this (roughly 7 steps)
[04a886372a2052078fa72b4ecb23f0ac8094f654] Merge branch 'tcp-add-cmsg-rx-timestamps-to-rx-zerocopy'

testing commit 04a886372a2052078fa72b4ecb23f0ac8094f654 with gcc (GCC) 8.1.0
kernel signature: f0b49953b471da4bf27e06c7e982baac9918f19ae5e5fb20f964350825d1ffcb
all runs: OK
# git bisect good 04a886372a2052078fa72b4ecb23f0ac8094f654
Bisecting: 67 revisions left to test after this (roughly 6 steps)
[9845b8f530196fd86fcc46c1c1298bf94b1604bf] can: mcp251xfd: mcp251xfd_start_xmit(): use mcp251xfd_get_tx_free() to check TX is is full

testing commit 9845b8f530196fd86fcc46c1c1298bf94b1604bf with gcc (GCC) 8.1.0
kernel signature: c89bf284a0c663b17337ae60e6c5a1d136d85d562f59ea9cf5dac1672a794876
all runs: OK
# git bisect good 9845b8f530196fd86fcc46c1c1298bf94b1604bf
Bisecting: 41 revisions left to test after this (roughly 5 steps)
[df9d80470a0c0ec63f82f6769df65e6af2bc1ddc] Merge tag 'linux-can-next-for-5.12-20210127' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

testing commit df9d80470a0c0ec63f82f6769df65e6af2bc1ddc with gcc (GCC) 8.1.0
kernel signature: 9b394371466029797a8140aeda19e51abf53b821ab3bf5b92c622947d39acdb6
all runs: OK
# git bisect good df9d80470a0c0ec63f82f6769df65e6af2bc1ddc
Bisecting: 20 revisions left to test after this (roughly 4 steps)
[2fe8ef106238b274c505c480ecf00d8765abf0d8] cfg80211: change netdev registration/unregistration semantics

testing commit 2fe8ef106238b274c505c480ecf00d8765abf0d8 with gcc (GCC) 8.1.0
net/wireless/core.c:1328:34: error: 'struct wiphy' has no member named 'mtx'
# git bisect skip 2fe8ef106238b274c505c480ecf00d8765abf0d8
Bisecting: 20 revisions left to test after this (roughly 4 steps)
[347c2989a8ba8a231f2ffc0635f2f36fedd30bde] mac80211: minstrel_ht: fix rounding error in throughput calculation

testing commit 347c2989a8ba8a231f2ffc0635f2f36fedd30bde with gcc (GCC) 8.1.0
kernel signature: 556c796aa77c369dd264a1aed321a05bba2c89d96422f9f50b53ca91606a619a
all runs: OK
# git bisect good 347c2989a8ba8a231f2ffc0635f2f36fedd30bde
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[3eac5d949afeca60982165e6fc4cece6f5882843] net/mlx5: Rename events notifier header

testing commit 3eac5d949afeca60982165e6fc4cece6f5882843 with gcc (GCC) 8.1.0
kernel signature: 721ed5151b1a2c0946e6451b1749283ad4e979493f4da013ce171205d6146190
all runs: crashed: WARNING in _cfg80211_unregister_wdev
# git bisect bad 3eac5d949afeca60982165e6fc4cece6f5882843
Bisecting: 5 revisions left to test after this (roughly 3 steps)
[5998dd0217dfdd37bf2bf4d6554005e8de2ecd19] Merge tag 'mac80211-next-for-net-next-2021-01-27' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

testing commit 5998dd0217dfdd37bf2bf4d6554005e8de2ecd19 with gcc (GCC) 8.1.0
kernel signature: ebb04adfafa1c910bdc887b9fc5e945294cb8eb9c7e7eb8542be94251529d503
all runs: crashed: WARNING in _cfg80211_unregister_wdev
# git bisect bad 5998dd0217dfdd37bf2bf4d6554005e8de2ecd19
Bisecting: 1 revision left to test after this (roughly 1 step)
[38ec7c6b6bd69b9ccc1873b9f465d4f16b46b26e] virt_wifi: fix deadlock on RTNL

testing commit 38ec7c6b6bd69b9ccc1873b9f465d4f16b46b26e with gcc (GCC) 8.1.0
kernel signature: 5de3d6d3b51ac0138baaa4551955b7d68d2bb3a87a67eced0391291c8db7a0e5
all runs: crashed: WARNING in _cfg80211_unregister_wdev
# git bisect bad 38ec7c6b6bd69b9ccc1873b9f465d4f16b46b26e
Bisecting: 1 revision left to test after this (roughly 1 step)
[a05829a7222e9d10c416dd2dbbf3929fe6646b89] cfg80211: avoid holding the RTNL when calling the driver

testing commit a05829a7222e9d10c416dd2dbbf3929fe6646b89 with gcc (GCC) 8.1.0
kernel signature: 768396fe032101f10d08d6a172a8fa3b4b40922ebc9f62ef88ce8a91196b7fb7
all runs: basic kernel testing failed: possible deadlock in cfg80211_netdev_notifier_call
# git bisect skip a05829a7222e9d10c416dd2dbbf3929fe6646b89
There are only 'skip'ped commits left to test.
The first bad commit could be any of:
2fe8ef106238b274c505c480ecf00d8765abf0d8
a05829a7222e9d10c416dd2dbbf3929fe6646b89
38ec7c6b6bd69b9ccc1873b9f465d4f16b46b26e
We cannot bisect more!

revisions tested: 16, total time: 3h16m37.571406106s (build: 1h24m19.635665896s, test: 1h50m33.926193921s)
bisection is inconclusive, the first bad commit could be any of:
2fe8ef106238b274c505c480ecf00d8765abf0d8
a05829a7222e9d10c416dd2dbbf3929fe6646b89
38ec7c6b6bd69b9ccc1873b9f465d4f16b46b26e