bisecting cause commit starting from aab35c3d5112df6e329a1a5a5a1881e5c4ca3821
building syzkaller on a371c43c33b6f901421f93b655442363c072d251
testing commit aab35c3d5112df6e329a1a5a5a1881e5c4ca3821
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: be5b17d938ec51c403913739c596cc815dc3e7661a6a4e5d5ec5d4fc80f3aa07
all runs: crashed: general protection fault in kvm_arch_vcpu_ioctl
testing release v5.18
testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 6a547ae4c0bacd80744000dba651833b4d3d190c088288a2a051ae2156ed199e
all runs: OK
# git bisect start aab35c3d5112df6e329a1a5a5a1881e5c4ca3821 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
Bisecting: 10431 revisions left to test after this (roughly 13 steps)
[ea6c3bc6ed93dd032568427e92424f6d33deb99b] Merge tag 'mfd-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

testing commit ea6c3bc6ed93dd032568427e92424f6d33deb99b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1cc1553fd2816c6354116fbc1b6e6939909145db65272fab9fdf79414035459f
all runs: OK
# git bisect good ea6c3bc6ed93dd032568427e92424f6d33deb99b
Bisecting: 5231 revisions left to test after this (roughly 12 steps)
[9839d2ae66111ad64013d13541aa5b80aabbbe8c] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git

testing commit 9839d2ae66111ad64013d13541aa5b80aabbbe8c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 2abc9dca4f83319b792de8518aafeff0547483a35daf6031fe6f3c3fd2c25ffe
all runs: OK
# git bisect good 9839d2ae66111ad64013d13541aa5b80aabbbe8c
Bisecting: 2540 revisions left to test after this (roughly 11 steps)
[e8bb1dd71cfc05882cd486c723fa5189867ee8de] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

testing commit e8bb1dd71cfc05882cd486c723fa5189867ee8de
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 648c7efffdf084d2fc8ad1cc6b943c7c0ad06280cb24e7dfeb6fb8ebf88949e5
all runs: OK
# git bisect good e8bb1dd71cfc05882cd486c723fa5189867ee8de
Bisecting: 1242 revisions left to test after this (roughly 10 steps)
[e1226a43436a824fbc12f90ecb303297bfac309e] Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git

testing commit e1226a43436a824fbc12f90ecb303297bfac309e
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b822196432e64a64d64370bbfed115d56fcac2230aecd07eb71d5c513177d41f
all runs: crashed: general protection fault in kvm_arch_vcpu_ioctl
# git bisect bad e1226a43436a824fbc12f90ecb303297bfac309e
Bisecting: 599 revisions left to test after this (roughly 9 steps)
[17f951167a4912f0c26cd58722265e63d690ffab] Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git

testing commit 17f951167a4912f0c26cd58722265e63d690ffab
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 8fb0f03cd23de7d8033df64816c41a83cb37e5feef858953b2362e039a36aa31
all runs: OK
# git bisect good 17f951167a4912f0c26cd58722265e63d690ffab
Bisecting: 299 revisions left to test after this (roughly 8 steps)
[9f88d062c3db13164a0d2007b88e1e430f523a06] KVM: selftests: Mostly fix broken Hyper-V Features test

testing commit 9f88d062c3db13164a0d2007b88e1e430f523a06
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 46c42def2e74a36e77557a299b3eae9fba0cc775e8e04dd8ad69eaf5f4fbe17c
run #0: OK
run #1: OK
run #2: OK
run #3: OK
run #4: boot failed: INFO: task hung in add_early_randomness
run #5: boot failed: INFO: task hung in add_early_randomness
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect good 9f88d062c3db13164a0d2007b88e1e430f523a06
Bisecting: 184 revisions left to test after this (roughly 7 steps)
[dab8713bd2841a4d04131a680f652d827c472d25] Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git

testing commit dab8713bd2841a4d04131a680f652d827c472d25
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 7eba2e6a3707453c564759b7ab00e950f256843236d601c1ab938e3910f83208
all runs: crashed: general protection fault in kvm_arch_vcpu_ioctl
# git bisect bad dab8713bd2841a4d04131a680f652d827c472d25
Bisecting: 54 revisions left to test after this (roughly 6 steps)
[711eae2e087ad08d8d916cb1d2370451d297654a] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git

testing commit 711eae2e087ad08d8d916cb1d2370451d297654a
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: bd94bb78372365c3ee071b567a7d2306cec1502b58b89bee5e1af2b3e91209df
all runs: crashed: general protection fault in kvm_arch_vcpu_ioctl
# git bisect bad 711eae2e087ad08d8d916cb1d2370451d297654a
Bisecting: 29 revisions left to test after this (roughly 5 steps)
[47855da0555a46eb4f98f5e5cae98525daf83ff9] KVM: x86/mmu: Extend make_huge_page_split_spte() for the shadow MMU

testing commit 47855da0555a46eb4f98f5e5cae98525daf83ff9
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 54846ea7ea4a7347bf11436d155df089d096e3e2b15c915b4bbbda41fbf037b5
run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect good 47855da0555a46eb4f98f5e5cae98525daf83ff9
Bisecting: 14 revisions left to test after this (roughly 4 steps)
[79c6edbb95432d78171d5f76b95d4e2d9cbd42b0] Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm.git

testing commit 79c6edbb95432d78171d5f76b95d4e2d9cbd42b0
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: e0f03fdb28a9214de58df1b7a60b4458ac0ef02ea5c7d70770aa23f1ff2dba01
all runs: crashed: general protection fault in kvm_arch_vcpu_ioctl
# git bisect bad 79c6edbb95432d78171d5f76b95d4e2d9cbd42b0
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[1d8c681fb6ed459128ab9d5e36adb7ec06a26aea] KVM: x86: Fill apic_lvt_mask with enums / explicit entries.

testing commit 1d8c681fb6ed459128ab9d5e36adb7ec06a26aea
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: dc4c0a6afb0d315331181dada4a8b06090c9ddf631a26b775e5618dfb706cefc
run #0: OK
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: boot failed: INFO: task hung in add_early_randomness
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect good 1d8c681fb6ed459128ab9d5e36adb7ec06a26aea
Bisecting: 3 revisions left to test after this (roughly 2 steps)
[281b52780b57821abc434c0413107d3075881a1f] KVM: x86: Add emulation for MSR_IA32_MCx_CTL2 MSRs.

testing commit 281b52780b57821abc434c0413107d3075881a1f
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 9ecdee4e31a95ae114d20d3c1ad3ff505fd3e0b8fe8f77aaf5381076550bbf3f
run #0: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #1: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #2: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #3: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #4: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #5: boot failed: INFO: task hung in add_early_randomness
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect bad 281b52780b57821abc434c0413107d3075881a1f
Bisecting: 1 revision left to test after this (roughly 1 step)
[4b903561ec499eef233bf690076cd71b1f8604cf] KVM: x86: Add Corrected Machine Check Interrupt (CMCI) emulation to lapic.

testing commit 4b903561ec499eef233bf690076cd71b1f8604cf
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: ab989b0503934921706ec33694eca150e5b2e76cf1371e21bd36a654a003d4de
run #0: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #1: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #2: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #3: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #4: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #5: crashed: general protection fault in kvm_arch_vcpu_ioctl
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect bad 4b903561ec499eef233bf690076cd71b1f8604cf
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[987f625e0799c9666ce0a0e18c2d0c001db96fad] KVM: x86: Add APIC_LVTx() macro.

testing commit 987f625e0799c9666ce0a0e18c2d0c001db96fad
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 3681e37ff621279ecfe643b7374bfb2da532055ed333e383733805f17ae3284e
run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe
run #1: OK
run #2: OK
run #3: OK
run #4: boot failed: INFO: task hung in add_early_randomness
run #5: boot failed: INFO: task hung in add_early_randomness
run #6: boot failed: INFO: task hung in add_early_randomness
run #7: boot failed: INFO: task hung in add_early_randomness
run #8: boot failed: INFO: task hung in add_early_randomness
run #9: boot failed: INFO: task hung in add_early_randomness
# git bisect skip 987f625e0799c9666ce0a0e18c2d0c001db96fad
There are only 'skip'ped commits left to test.
The first bad commit could be any of:
987f625e0799c9666ce0a0e18c2d0c001db96fad
4b903561ec499eef233bf690076cd71b1f8604cf
We cannot bisect more!

revisions tested: 16, total time: 3h48m34.905134129s (build: 1h47m28.186219277s, test: 1h59m22.914727695s)
bisection is inconclusive, the first bad commit could be any of:
987f625e0799c9666ce0a0e18c2d0c001db96fad
4b903561ec499eef233bf690076cd71b1f8604cf