bisecting cause commit starting from 6185266c5a853bb0f2a459e3ff594546f277609b
building syzkaller on 06ed56cd22e24a55c40d152880b66b108834c8f2
testing commit 6185266c5a853bb0f2a459e3ff594546f277609b with gcc (GCC) 10.2.1 20210217
kernel signature: 1850828eedad9fc18f982475389ea8d73c3ff7bd4cae06f52517c9d5b6e3ffbd
run #0: crashed: SYZFAIL: wrong response packet
run #1: crashed: SYZFAIL: wrong response packet
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
reproducer seems to be flaky
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217
kernel signature: 502ad52704fa1263450a8f60089c4e01f68858c9b2c89c4d14a71d67aa041092
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 10.2.1 20210217
kernel signature: 0ca9dcf3af21d1a5232536de4f8c9778d9f136c1a60b7c1c645fc9418ee2b463
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 10.2.1 20210217
kernel signature: f35ba365435e6b891c352e8b6ef0836217246197fa760240a81c026a0fb39f68
all runs: OK
# git bisect start 2c85ebc57b3e1817b6ce1a6b703928e113a90442 bbf5c979011a099af5dc76498918ed7df445635b
Bisecting: 9594 revisions left to test after this (roughly 13 steps)
[4d0e9df5e43dba52d38b251e3b909df8fa1110be] lib, uaccess: add failure injection to usercopy functions

testing commit 4d0e9df5e43dba52d38b251e3b909df8fa1110be with gcc (GCC) 10.2.1 20210217
kernel signature: 168129e13cc6ff8f87807c6aa52d208d82e71cb89674215c2ad46fff5e2f9542
all runs: OK
# git bisect good 4d0e9df5e43dba52d38b251e3b909df8fa1110be
Bisecting: 4874 revisions left to test after this (roughly 12 steps)
[6694875ef8045cdb1e6712ee9b68fe08763507d8] ext4: indicate that fast_commit is available via /sys/fs/ext4/feature/...

testing commit 6694875ef8045cdb1e6712ee9b68fe08763507d8 with gcc (GCC) 10.2.1 20210217
kernel signature: 4b5299a4b9853e5f59134b16b2daa0115cd35658d2ccc67e96cbdda29127ae24
all runs: OK
# git bisect good 6694875ef8045cdb1e6712ee9b68fe08763507d8
Bisecting: 2439 revisions left to test after this (roughly 11 steps)
[cf9446cc8e6d85355642209538dde619f53770dc] Merge tag 'io_uring-5.10-2020-10-30' of git://git.kernel.dk/linux-block

testing commit cf9446cc8e6d85355642209538dde619f53770dc with gcc (GCC) 10.2.1 20210217
kernel signature: 7ba3288ec8689b56f413fdfbbe5255e392dfd41613eba5f4a341a71f6a082cb4
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad cf9446cc8e6d85355642209538dde619f53770dc
Bisecting: 1274 revisions left to test after this (roughly 10 steps)
[e731f3146ff3bba5424b40140e1a7e6f92e94964] Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

testing commit e731f3146ff3bba5424b40140e1a7e6f92e94964 with gcc (GCC) 10.2.1 20210217
kernel signature: b9bac843db118197861691dca287979eba38d0e0ae48d86f568eb088fe7f9f32
all runs: OK
# git bisect good e731f3146ff3bba5424b40140e1a7e6f92e94964
Bisecting: 639 revisions left to test after this (roughly 9 steps)
[a3ca4b5e92267670bf2fcdca7d1aaa96f89ea652] Merge tag 'actions-arm64-dt-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/linux-actions into arm/dt

testing commit a3ca4b5e92267670bf2fcdca7d1aaa96f89ea652 with gcc (GCC) 8.4.1 20210217
kernel signature: 65f5c0d57882b2d3db4873326f155215c053ca2fc3670b7b0be840c27a3c3734
all runs: OK
# git bisect good a3ca4b5e92267670bf2fcdca7d1aaa96f89ea652
Bisecting: 323 revisions left to test after this (roughly 8 steps)
[af0041875ce7f5a05362b884e90cf82c27876096] Merge tag 'io_uring-5.10-2020-10-24' of git://git.kernel.dk/linux-block

testing commit af0041875ce7f5a05362b884e90cf82c27876096 with gcc (GCC) 10.2.1 20210217
kernel signature: 8932eec0a3e1e3261ad95029967370030b5d6a7c4c53edae5f78ee846eeae21d
all runs: OK
# git bisect good af0041875ce7f5a05362b884e90cf82c27876096
Bisecting: 156 revisions left to test after this (roughly 7 steps)
[934291ffb638f2785cc9587403df4895f5c838ac] Merge tag 'net-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

testing commit 934291ffb638f2785cc9587403df4895f5c838ac with gcc (GCC) 10.2.1 20210217
kernel signature: 1043895e6bd09b162b6949fac55c1df62f2e93ea0c48aa026e2d0c3d23e672a4
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 934291ffb638f2785cc9587403df4895f5c838ac
Bisecting: 83 revisions left to test after this (roughly 6 steps)
[5c024e68d79b1ed8029afd2cae87c67865426cbe] mfd: google,cros-ec: add missing properties

testing commit 5c024e68d79b1ed8029afd2cae87c67865426cbe with gcc (GCC) 10.2.1 20210217
kernel signature: d037fc7d9e9ae5edd9bae17d7ede689e3f27764bbc427cde4c6a0cefd7ddcb34
all runs: OK
# git bisect good 5c024e68d79b1ed8029afd2cae87c67865426cbe
Bisecting: 40 revisions left to test after this (roughly 5 steps)
[b9c0f4bd5b8114ee1773734e07cda921b6e8248b] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

testing commit b9c0f4bd5b8114ee1773734e07cda921b6e8248b with gcc (GCC) 10.2.1 20210217
kernel signature: 89cc5b5262664625db087d8b3fd56a62c7608d393c30274e0cd2978234cf79f7
all runs: OK
# git bisect good b9c0f4bd5b8114ee1773734e07cda921b6e8248b
Bisecting: 20 revisions left to test after this (roughly 4 steps)
[21d6a11e2cadfb8446265a3efff0e2aad206e15e] bnxt_en: Fix regression in workqueue cleanup logic in bnxt_remove_one().

testing commit 21d6a11e2cadfb8446265a3efff0e2aad206e15e with gcc (GCC) 10.2.1 20210217
kernel signature: 974c40b1411ffed2d64ee76ae74e2002c2d279b656afd08b0913c9fc6d857d12
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 21d6a11e2cadfb8446265a3efff0e2aad206e15e
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[937d8420588421eaa5c7aa5c79b26b42abb288ef] cxgb4: set up filter action after rewrites

testing commit 937d8420588421eaa5c7aa5c79b26b42abb288ef with gcc (GCC) 10.2.1 20210217
kernel signature: 0d58acc53ebaa0a109cf7bf6fec40784bc4179d861a60fd3691117fffda007ed
all runs: OK
# git bisect good 937d8420588421eaa5c7aa5c79b26b42abb288ef
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[522ee51e677112e2baf135b26c1a03a77a7b4454] Merge branch 'net-smc-fixes-2020-10-23'

testing commit 522ee51e677112e2baf135b26c1a03a77a7b4454 with gcc (GCC) 10.2.1 20210217
kernel signature: 974c40b1411ffed2d64ee76ae74e2002c2d279b656afd08b0913c9fc6d857d12
all runs: OK
# git bisect good 522ee51e677112e2baf135b26c1a03a77a7b4454
Bisecting: 2 revisions left to test after this (roughly 1 step)
[adc80b6cfedff6dad8b93d46a5ea2775fd5af9ec] mlxsw: core: Fix memory leak on module removal

testing commit adc80b6cfedff6dad8b93d46a5ea2775fd5af9ec with gcc (GCC) 10.2.1 20210217
kernel signature: 974c40b1411ffed2d64ee76ae74e2002c2d279b656afd08b0913c9fc6d857d12
all runs: OK
# git bisect good adc80b6cfedff6dad8b93d46a5ea2775fd5af9ec
Bisecting: 0 revisions left to test after this (roughly 1 step)
[19c176eb079834c5cf8574ce18c1d934ec486dd8] Merge branch 'mlxsw-various-fixes'

testing commit 19c176eb079834c5cf8574ce18c1d934ec486dd8 with gcc (GCC) 10.2.1 20210217
kernel signature: 974c40b1411ffed2d64ee76ae74e2002c2d279b656afd08b0913c9fc6d857d12
run #0: crashed: SYZFAIL: wrong response packet
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 19c176eb079834c5cf8574ce18c1d934ec486dd8
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[0daf2bf5a2dcf33d446b76360908f109816e2e21] mlxsw: core: Fix use-after-free in mlxsw_emad_trans_finish()

testing commit 0daf2bf5a2dcf33d446b76360908f109816e2e21 with gcc (GCC) 10.2.1 20210217
kernel signature: 974c40b1411ffed2d64ee76ae74e2002c2d279b656afd08b0913c9fc6d857d12
all runs: OK
# git bisect good 0daf2bf5a2dcf33d446b76360908f109816e2e21
19c176eb079834c5cf8574ce18c1d934ec486dd8 is the first bad commit
commit 19c176eb079834c5cf8574ce18c1d934ec486dd8
Merge: 522ee51e6771 0daf2bf5a2dc
Author: Jakub Kicinski <kuba@kernel.org>
Date:   Mon Oct 26 16:45:53 2020 -0700

    Merge branch 'mlxsw-various-fixes'
    
    Ido Schimmel says:
    
    ====================
    mlxsw: Various fixes
    
    This patch set contains various fixes for mlxsw.
    
    Patch #1 ensures that only link modes that are supported by both the
    device and the driver are advertised. When a link mode that is not
    supported by the driver is negotiated by the device, it will be
    presented as an unknown speed by ethtool, causing the bond driver to
    wrongly assume that the link is down.
    
    Patch #2 fixes a trivial memory leak upon module removal.
    
    Patch #3 fixes a use-after-free that syzkaller was able to trigger once
    on a slow emulator after a few months of fuzzing.
    ====================
    
    Link: https://lore.kernel.org/r/20201024133733.2107509-1-idosch@idosch.org
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

 drivers/net/ethernet/mellanox/mlxsw/core.c         |  5 ++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c     |  9 +++++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     |  1 +
 .../net/ethernet/mellanox/mlxsw/spectrum_ethtool.c | 30 ++++++++++++++++++++++
 4 files changed, 43 insertions(+), 2 deletions(-)

Reproducer flagged being flaky
revisions tested: 19, total time: 5h54m9.908983571s (build: 2h5m58.428864296s, test: 3h46m6.850894805s)
first bad commit: 19c176eb079834c5cf8574ce18c1d934ec486dd8 Merge branch 'mlxsw-various-fixes'
recipients (to): ["kuba@kernel.org"]
recipients (cc): []
crash: SYZFAIL: wrong response packet
2021/03/04 04:03:14 result: hanged=false err=executor 5: exit status 67
SYZFAIL: wrong response packet
 (errno 16: Device or resource busy)
loop exited with status 67


SYZFAIL: wrong response packet
 (errno 16: Device or resource busy)
loop exited with status 67
2021/03/04 04:03:17 executed programs: 34
2021/03/04 04:03:22 executed programs: 246