bisecting cause commit starting from 1c273e10bc0cc7efb933e0ca10e260cdfc9f0b8c
building syzkaller on 17810eaefa3a6802fa401bda89898b763680d1e4
testing commit 1c273e10bc0cc7efb933e0ca10e260cdfc9f0b8c with gcc (GCC) 10.2.1 20210217
kernel signature: 638f0cfcccc65b32539d637e92d77a970c349a037a58925a76d4ebb3b340e838
run #0: crashed: possible deadlock in scheduler_tick
run #1: crashed: possible deadlock in kvm_synchronize_tsc
run #2: crashed: possible deadlock in scheduler_tick
run #3: crashed: possible deadlock in scheduler_tick
run #4: crashed: possible deadlock in scheduler_tick
run #5: crashed: possible deadlock in scheduler_tick
run #6: crashed: possible deadlock in scheduler_tick
run #7: crashed: possible deadlock in kvm_synchronize_tsc
run #8: crashed: possible deadlock in scheduler_tick
run #9: crashed: possible deadlock in scheduler_tick
run #10: crashed: possible deadlock in scheduler_tick
run #11: crashed: possible deadlock in scheduler_tick
run #12: crashed: possible deadlock in scheduler_tick
run #13: crashed: possible deadlock in scheduler_tick
run #14: crashed: possible deadlock in kvm_synchronize_tsc
run #15: crashed: possible deadlock in scheduler_tick
run #16: crashed: possible deadlock in kvm_synchronize_tsc
run #17: crashed: possible deadlock in kvm_synchronize_tsc
run #18: crashed: possible deadlock in scheduler_tick
run #19: crashed: possible deadlock in scheduler_tick
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217
kernel signature: 0060f998cf503ac1654a9c4262c8927768d9a752547f1a416fab09d8bbd9070a
all runs: OK
# git bisect start 1c273e10bc0cc7efb933e0ca10e260cdfc9f0b8c f40ddce88593482919761f74910f42f4b84c004b
Bisecting: 6906 revisions left to test after this (roughly 13 steps)
[a864e8f159b13babf552aff14a5fbe11abc017e4] ALSA: hda: intel-nhlt: verify config type

testing commit a864e8f159b13babf552aff14a5fbe11abc017e4 with gcc (GCC) 10.2.1 20210217
kernel signature: db7c4730c8a54777b660724b0df6ecf5057fa54b8ed855537f6dcd49b0eaf219
run #0: crashed: WARNING in kvm_wait
run #1: crashed: WARNING in kvm_wait
run #2: boot failed: WARNING in kvm_wait
run #3: boot failed: WARNING in kvm_wait
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
reproducer seems to be flaky
# git bisect bad a864e8f159b13babf552aff14a5fbe11abc017e4
Bisecting: 2929 revisions left to test after this (roughly 12 steps)
[e4286926abbbaab9b047c8bc25cae78ec990928f] Merge tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

testing commit e4286926abbbaab9b047c8bc25cae78ec990928f with gcc (GCC) 10.2.1 20210217
kernel signature: a665cf6fdec9d7b19a33666de345c4aafe3300dceaf1b2821458ba12a9be2b6c
all runs: OK
# git bisect good e4286926abbbaab9b047c8bc25cae78ec990928f
Bisecting: 1417 revisions left to test after this (roughly 11 steps)
[d089f48fba28db14d0fe7753248f2575a9ddfc73] Merge tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

testing commit d089f48fba28db14d0fe7753248f2575a9ddfc73 with gcc (GCC) 10.2.1 20210217
kernel signature: 4684430b97c9d93cf4e44ba1de789897bd72097e4f1cde7465a7d4dd4d49d569
all runs: OK
# git bisect good d089f48fba28db14d0fe7753248f2575a9ddfc73
Bisecting: 737 revisions left to test after this (roughly 10 steps)
[66f73fb3facd42d0a7c899d7f4c712332b28499a] Merge tag 'for-linus-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs

testing commit 66f73fb3facd42d0a7c899d7f4c712332b28499a with gcc (GCC) 10.2.1 20210217
kernel signature: 9b15ab62a4bb2169536f460f8a315dc3727172257f7e87ea84776f705f86b404
run #0: crashed: BUG: spinlock bad magic in synchronize_srcu
run #1: crashed: BUG: spinlock bad magic in synchronize_srcu
run #2: crashed: WARNING in kvm_wait
run #3: crashed: WARNING in kvm_wait
run #4: crashed: WARNING in kvm_wait
run #5: crashed: WARNING in kvm_wait
run #6: crashed: BUG: spinlock bad magic in synchronize_srcu
run #7: boot failed: WARNING in kvm_wait
run #8: boot failed: WARNING in kvm_wait
run #9: boot failed: WARNING in kvm_wait
run #10: boot failed: WARNING in kvm_wait
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 66f73fb3facd42d0a7c899d7f4c712332b28499a
Bisecting: 355 revisions left to test after this (roughly 8 steps)
[08179b47e1fdf288e5d59f90e5ce31513bb019c3] Merge branch 'parisc-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

testing commit 08179b47e1fdf288e5d59f90e5ce31513bb019c3 with gcc (GCC) 10.2.1 20210217
kernel signature: 4bd8b2ec5b6867fc4a19d98d4525b5b9a650ecd22c881cf02dd740d5c432b0d6
run #0: crashed: BUG: spinlock bad magic in synchronize_srcu
run #1: crashed: BUG: spinlock bad magic in synchronize_srcu
run #2: crashed: WARNING in kvm_wait
run #3: crashed: WARNING in kvm_wait
run #4: boot failed: WARNING in kvm_wait
run #5: boot failed: WARNING in kvm_wait
run #6: boot failed: WARNING in kvm_wait
run #7: boot failed: WARNING in kvm_wait
run #8: boot failed: WARNING in kvm_wait
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 08179b47e1fdf288e5d59f90e5ce31513bb019c3
Bisecting: 209 revisions left to test after this (roughly 7 steps)
[4a037ad5d115b2cc79a5071a7854475f365476fa] Merge tag 'for-linus-5.12-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

testing commit 4a037ad5d115b2cc79a5071a7854475f365476fa with gcc (GCC) 10.2.1 20210217
kernel signature: 622f41877dc7ef3e8d9e3e5146e880e00904404ceb118bf17bc5ced4f3da2b2d
run #0: crashed: WARNING in kvm_wait
run #1: crashed: WARNING in kvm_wait
run #2: crashed: WARNING in kvm_wait
run #3: crashed: WARNING in kvm_wait
run #4: boot failed: WARNING in kvm_wait
run #5: boot failed: WARNING in kvm_wait
run #6: boot failed: WARNING in kvm_wait
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 4a037ad5d115b2cc79a5071a7854475f365476fa
Bisecting: 61 revisions left to test after this (roughly 6 steps)
[c5e6fc08feb2b88dc5dac2f3c817e1c2a4cafda4] sched,x86: Allow !PREEMPT_DYNAMIC

testing commit c5e6fc08feb2b88dc5dac2f3c817e1c2a4cafda4 with gcc (GCC) 10.2.1 20210217
kernel signature: 54cb92593d5b1c9fdda48873212c9a2537b55369f0597920c7fbe9a3444a2c4a
run #0: crashed: BUG: spinlock bad magic in synchronize_srcu
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 c5e6fc08feb2b88dc5dac2f3c817e1c2a4cafda4
Bisecting: 25 revisions left to test after this (roughly 5 steps)
[798172b1374e28ecf687d6662fc5fdaec5c65385] rbtree, timerqueue: Use rb_add_cached()

testing commit 798172b1374e28ecf687d6662fc5fdaec5c65385 with gcc (GCC) 10.2.1 20210217
kernel signature: 46aba5853b5a1c16cbb54e54cdba5f7b782ff2ffa0801c38f62eb625088ab846
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 798172b1374e28ecf687d6662fc5fdaec5c65385
Bisecting: 25 revisions left to test after this (roughly 5 steps)
[9d061ba6bc170045857f3efe0bba5def30188d4d] sched: Remove USER_PRIO, TASK_USER_PRIO and MAX_USER_PRIO

testing commit 9d061ba6bc170045857f3efe0bba5def30188d4d with gcc (GCC) 10.2.1 20210217
kernel signature: d25ae1ac48261e71563764e94cac51ff9a42f15b0c07b687b894921d48325e74
run #0: crashed: BUG: spinlock bad magic in synchronize_srcu
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 9d061ba6bc170045857f3efe0bba5def30188d4d
Bisecting: 14 revisions left to test after this (roughly 4 steps)
[1875dc5b8ff4690547c446ef222083e28e2d9463] sched: Correctly sort struct predeclarations

testing commit 1875dc5b8ff4690547c446ef222083e28e2d9463 with gcc (GCC) 10.2.1 20210217
kernel signature: f3d11e5bd22e205ba2aa7415776b702c72f6ac3fe28b33a93b97acbd64828ac2
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 1875dc5b8ff4690547c446ef222083e28e2d9463
Bisecting: 14 revisions left to test after this (roughly 4 steps)
[d1515851ca075ed98fe78ac6abf24ba2dd25a63b] thermal: cpufreq_cooling: Reuse sched_cpu_util() for SMP platforms

testing commit d1515851ca075ed98fe78ac6abf24ba2dd25a63b with gcc (GCC) 10.2.1 20210217
kernel signature: f4e27ab15e59b5a3c292d6ce7bde944b7cf8bc52035c564c9c17101c4439bae3
all runs: OK
# git bisect good d1515851ca075ed98fe78ac6abf24ba2dd25a63b
Bisecting: 12 revisions left to test after this (roughly 4 steps)
[bae4ec13640b0915e7dd86da7e65c5d085160571] sched/fair: Move avg_scan_cost calculations under SIS_PROP

testing commit bae4ec13640b0915e7dd86da7e65c5d085160571 with gcc (GCC) 10.2.1 20210217
kernel signature: 624ecb005f4c688dc3617060385de7a275d9d8650dc705a58d2471b02e5a9ac2
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip bae4ec13640b0915e7dd86da7e65c5d085160571
Bisecting: 12 revisions left to test after this (roughly 4 steps)
[fc488ffd4297f661b3e9d7450dcdb9089a53df7c] sched/fair: Skip idle cfs_rq

testing commit fc488ffd4297f661b3e9d7450dcdb9089a53df7c with gcc (GCC) 10.2.1 20210217
kernel signature: 0570dc127c1692747cff9ddef7fa9ed4affd1315622dc589170e3b2c17a9a1e1
all runs: OK
# git bisect good fc488ffd4297f661b3e9d7450dcdb9089a53df7c
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[6cd56ef1df399a004f90ecb682427f9964969fc9] sched/fair: Remove select_idle_smt()

testing commit 6cd56ef1df399a004f90ecb682427f9964969fc9 with gcc (GCC) 10.2.1 20210217
kernel signature: 1daeb8334ae809007ade4d5a328749ee31bf7f8689b23adbf059da39cc72776d
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 6cd56ef1df399a004f90ecb682427f9964969fc9
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[ed3cd45f8ca873dd320ff7e6b4c1c8f83a65302c] Merge tag 'v5.11' into sched/core, to pick up fixes & refresh the branch

testing commit ed3cd45f8ca873dd320ff7e6b4c1c8f83a65302c with gcc (GCC) 10.2.1 20210217
kernel signature: b210ff95eb7abe6d88910a0d9dd53e071be39e3f0721ea420b5ee387c86449db
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip ed3cd45f8ca873dd320ff7e6b4c1c8f83a65302c
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[5a7987253ef0909d94e176cd97e511013de0fe19] rbtree, rtmutex: Use rb_add_cached()

testing commit 5a7987253ef0909d94e176cd97e511013de0fe19 with gcc (GCC) 10.2.1 20210217
kernel signature: e44aa1abda31b6b78c19b8150cdd1c2a1d386f4a77696601c11bd73f40c6aad4
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 5a7987253ef0909d94e176cd97e511013de0fe19
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[2d24dd5798d0474d9bf705bfca8725e7d20f9d54] rbtree: Add generic add and find helpers

testing commit 2d24dd5798d0474d9bf705bfca8725e7d20f9d54 with gcc (GCC) 10.2.1 20210217
kernel signature: a06176d7d19d15f6dc2645e26b3c5332fac8e5f3d6563ff4a5c6e23e36ac33fe
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 2d24dd5798d0474d9bf705bfca8725e7d20f9d54
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[0ae78eec8aa64e645866e75005162603a77a0f49] sched/eas: Don't update misfit status if the task is pinned

testing commit 0ae78eec8aa64e645866e75005162603a77a0f49 with gcc (GCC) 10.2.1 20210217
kernel signature: 451bce96279556f3c39a225cd70cc19277300f35e883d8ac69425b5dc6e8e63d
all runs: OK
# git bisect good 0ae78eec8aa64e645866e75005162603a77a0f49
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[e6e0dc2d5497f7f3ed970052917e2923c6f453f4] sched/fair: Remove SIS_AVG_CPU

testing commit e6e0dc2d5497f7f3ed970052917e2923c6f453f4 with gcc (GCC) 10.2.1 20210217
kernel signature: d5f80d6edff006c0c0c4593be90dee24a943f192188d24238c647bd0eb343631
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip e6e0dc2d5497f7f3ed970052917e2923c6f453f4
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[9fe1f127b913318c631d0041ecf71486e38c2c2d] sched/fair: Merge select_idle_core/cpu()

testing commit 9fe1f127b913318c631d0041ecf71486e38c2c2d with gcc (GCC) 10.2.1 20210217
kernel signature: f1028838cfe84dbecb10e307f85ac38e6af3adfbdc3193d9dfed6df73525ec00
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 9fe1f127b913318c631d0041ecf71486e38c2c2d
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[a905e84e64083a0ee701f61810badee234050825] rbtree, uprobes: Use rbtree helpers

testing commit a905e84e64083a0ee701f61810badee234050825 with gcc (GCC) 10.2.1 20210217
kernel signature: c72f6d8bd6deb83edcd51c1697f5cc708a379a026b0260a962ce8bb3f6f0e35d
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip a905e84e64083a0ee701f61810badee234050825
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[bf9be9a163b464aa90f60af13b336da2db8b2ea1] rbtree, sched/fair: Use rb_add_cached()

testing commit bf9be9a163b464aa90f60af13b336da2db8b2ea1 with gcc (GCC) 10.2.1 20210217
kernel signature: 99785e6b379706074c70682082d63aa663223a4ac0be232fcfb2bf1fb189f3b1
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip bf9be9a163b464aa90f60af13b336da2db8b2ea1
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[71e5f6644fb2f3304fcb310145ded234a37e7cc1] sched/topology: Fix sched_domain_topology_level alloc in sched_init_numa()

testing commit 71e5f6644fb2f3304fcb310145ded234a37e7cc1 with gcc (GCC) 10.2.1 20210217
kernel signature: eece9331780ab25469e7f5b3884fedee1b35556d02752f1df411d3a243c4f50d
run #0: crashed: BUG: spinlock bad magic in synchronize_srcu
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 71e5f6644fb2f3304fcb310145ded234a37e7cc1
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[a3b89864554bbce1594b7abdb5739fc708c1ca95] rbtree, perf: Use new rbtree helpers

testing commit a3b89864554bbce1594b7abdb5739fc708c1ca95 with gcc (GCC) 10.2.1 20210217
kernel signature: 9a566175ba629e0b504ff338f5883fb761630b6b0e340df9b3db5f0d5d9db51f
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip a3b89864554bbce1594b7abdb5739fc708c1ca95
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[8ecca39483ed4e4e97096d0d6f8e25fdd323b189] rbtree, sched/deadline: Use rb_add_cached()

testing commit 8ecca39483ed4e4e97096d0d6f8e25fdd323b189 with gcc (GCC) 10.2.1 20210217
kernel signature: 35b383c5edf8303cc71c86bd48741f76f8798277993e50907c494a3af0c00ad2
all runs: boot failed: KASAN: slab-out-of-bounds Read in build_sched_domains
# git bisect skip 8ecca39483ed4e4e97096d0d6f8e25fdd323b189
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[432900f8164b77376df2c25113fb94f9d7fffd79] init/Kconfig: Correct thermal pressure help text

Reproducer flagged being flaky
revisions tested: 27, total time: 8h0m44.722628017s (build: 2h56m54.429245573s, test: 5h1m57.877737976s)
error: bisection is taking too long (>8h0m0s), aborting