bisecting cause commit starting from a1f92694393a5a607212293cdccececdf6272253
building syzkaller on a343ba6b077a3efe7feb57783dcbb7496d2c3572
testing commit a1f92694393a5a607212293cdccececdf6272253 with gcc (GCC) 10.2.1 20210217
kernel signature: 218c4c60f15ef7f054f5e8b9ed28ed8286119f6c50dfb5e16a44835f6eaf7bfe
run #0: crashed: INFO: rcu detected stall in input_repeat_key
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: crashed: INFO: rcu detected stall in input_repeat_key
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: crashed: INFO: rcu detected stall in input_repeat_key
run #18: OK
run #19: OK
reproducer seems to be flaky
testing release v5.12
testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 with gcc (GCC) 10.2.1 20210217
kernel signature: 20a3195b0c2adea39c30d2e9f830a6fa425a34f031f28cd84a5fc4bf09ce8f4d
run #0: crashed: INFO: rcu detected stall in newfstat
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: crashed: INFO: task hung in switchdev_deferred_process_work
run #8: OK
run #9: OK
run #10: crashed: KASAN: stack-out-of-bounds Read in __show_regs
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 v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217
kernel signature: 22b26ae1e3be417e2ad324e47433a262e845b6471dfc09f4fa2f647b3330df8e
run #0: crashed: INFO: rcu detected stall in input_repeat_key
run #1: crashed: INFO: rcu detected stall in hub_event
run #2: crashed: INFO: rcu detected stall in input_repeat_key
run #3: crashed: INFO: rcu detected stall in input_repeat_key
run #4: crashed: INFO: rcu detected stall in input_repeat_key
run #5: crashed: INFO: rcu detected stall in tty_ioctl
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: 8f55ba93fd53951cac9b68b979c728becbef461543abacbe99727324ff41baf6
run #0: crashed: INFO: rcu detected stall in input_repeat_key
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon
run #3: crashed: INFO: rcu detected stall in dummy_timer
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: f654d07eeb7c456b884d4afbd5bc4d393d1b1677ed42327eee0eaef482a1d4de
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: crashed: INFO: rcu detected stall in do_idle
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 v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.4.1 20210217
kernel signature: 1063ebaf54671db7804acf12269942e9a5933d00bfb78bb5cf898a218f3c1d07
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: crashed: INFO: rcu detected stall in input_repeat_key
run #3: crashed: INFO: rcu detected stall in kmsg_read
run #4: crashed: INFO: rcu detected stall in corrupted
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 v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.4.1 20210217
kernel signature: 3856a09b3d94850025e3ae49dd0f33b972955333e09df445983a6a278d85997d
run #0: crashed: INFO: rcu detected stall in input_repeat_key
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: OK
run #3: crashed: INFO: rcu detected stall in sys_clock_nanosleep
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 v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.4.1 20210217
kernel signature: a3b93acd1315ac27fd28df3f64d6ec371b03ab2c3dca6caf01eeb51039157802
all runs: OK
# git bisect start 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 7111951b8d4973bda27ff663f2cf18b663d15b48
Bisecting: 7542 revisions left to test after this (roughly 13 steps)
[50a5de895dbe5df947b3a695777db5b2c313e065] Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

testing commit 50a5de895dbe5df947b3a695777db5b2c313e065 with gcc (GCC) 8.4.1 20210217
kernel signature: 8c492eeb83296505f75f486cb098d86ee802cfed548885f0e9dc5111dcb79baf
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 50a5de895dbe5df947b3a695777db5b2c313e065
Bisecting: 7542 revisions left to test after this (roughly 13 steps)
[422c032afcf57d5e8109a54912e22ffc53d99068] netfilter: flowtable: Use rw sem as flow block lock

testing commit 422c032afcf57d5e8109a54912e22ffc53d99068 with gcc (GCC) 8.4.1 20210217
kernel signature: b86b3efc45b641558d4476c0583730deb81e563c3bc85852eddf8dbe673761af
run #0: OK
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: boot failed: can't ssh into the instance
# git bisect good 422c032afcf57d5e8109a54912e22ffc53d99068
Bisecting: 6728 revisions left to test after this (roughly 13 steps)
[8c1b724ddb218f221612d4c649bc9c7819d8d7a6] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

testing commit 8c1b724ddb218f221612d4c649bc9c7819d8d7a6 with gcc (GCC) 8.4.1 20210217
kernel signature: 9ca3d3faa5abfaf68e031da9178a4e4d833291ca7b42a71565632a07460f3125
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 8c1b724ddb218f221612d4c649bc9c7819d8d7a6
Bisecting: 6728 revisions left to test after this (roughly 13 steps)
[88d7fcfa3b1fe670f0412b95be785aafca63352b] net: inet_csk: Fix so_reuseport bind-address cache in tb->fast*

testing commit 88d7fcfa3b1fe670f0412b95be785aafca63352b with gcc (GCC) 8.4.1 20210217
kernel signature: f00d76dec4e5a7ed5a7ed269aa9c9844affc05e1e251420b40c2d3eea5165455
run #0: crashed: INFO: rcu detected stall in clone
run #1: OK
run #2: crashed: INFO: rcu detected stall in dummy_timer
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 88d7fcfa3b1fe670f0412b95be785aafca63352b
Bisecting: 6383 revisions left to test after this (roughly 13 steps)
[6cad420cc695867b4ca710bac21fde21a4102e4b] Merge branch 'akpm' (patches from Andrew)

testing commit 6cad420cc695867b4ca710bac21fde21a4102e4b with gcc (GCC) 8.4.1 20210217
kernel signature: 7c1a6ea61ce052e03f6dcd83426326bb1215aca5d4a82a93bc6f920b0b47874b
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 6cad420cc695867b4ca710bac21fde21a4102e4b
Bisecting: 6383 revisions left to test after this (roughly 13 steps)
[77a36a3ab4ff17fad23831192e3694a3c5a1750d] HID: Add driver fixing Glorious PC Gaming Race mouse report descriptor

testing commit 77a36a3ab4ff17fad23831192e3694a3c5a1750d with gcc (GCC) 8.4.1 20210217
kernel signature: 608507f100d2759478a542e5f0057422959981dff342c3b98844e84a54a5ff41
all runs: OK
# git bisect good 77a36a3ab4ff17fad23831192e3694a3c5a1750d
Bisecting: 6383 revisions left to test after this (roughly 13 steps)
[8ec91c0fce1500306a858d0c35d1383fd9eb6ba6] Merge tag 'gpio-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

testing commit 8ec91c0fce1500306a858d0c35d1383fd9eb6ba6 with gcc (GCC) 8.4.1 20210217
kernel signature: ca2b35fcdf1ce286337a1c4de812dc2f2c8be97c8910af2ad82eba20098bdee0
run #0: crashed: INFO: rcu detected stall in input_repeat_key
run #1: crashed: INFO: rcu detected stall in input_repeat_key
run #2: crashed: INFO: rcu detected stall in input_repeat_key
run #3: crashed: INFO: rcu detected stall in sys_readlinkat
run #4: crashed: INFO: rcu detected stall in input_repeat_key
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 8ec91c0fce1500306a858d0c35d1383fd9eb6ba6
Bisecting: 6337 revisions left to test after this (roughly 13 steps)
[7be97138e7276c71cc9ad1752dcb502d28f4400d] Merge tag 'xfs-5.7-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

testing commit 7be97138e7276c71cc9ad1752dcb502d28f4400d with gcc (GCC) 8.4.1 20210217
kernel signature: 8acebe51ff4f48fe086cd66da8972b11a73d6fcc9819da46f3499cfd2f472f51
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 7be97138e7276c71cc9ad1752dcb502d28f4400d
Bisecting: 6337 revisions left to test after this (roughly 13 steps)
[f5637d3b42ab0465ef71d5fb8461bce97fba95e8] mm/memory_hotplug: rename mhp_restrictions to mhp_params

testing commit f5637d3b42ab0465ef71d5fb8461bce97fba95e8 with gcc (GCC) 8.4.1 20210217
kernel signature: 6316b6fb43ed06b8d39215517f8f5837701c614e1dc568e4b8c1d8c587410be5
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip f5637d3b42ab0465ef71d5fb8461bce97fba95e8
Bisecting: 6337 revisions left to test after this (roughly 13 steps)
[1592c4b9935fa8a3b7c297955bb872a357e5a3b6] pinctrl: sprd: Add pin high impedance mode support

testing commit 1592c4b9935fa8a3b7c297955bb872a357e5a3b6 with gcc (GCC) 8.4.1 20210217
kernel signature: 9e9fbf95fcd5e41e9dae43033852951f0c1bab562e4c98cef545bc620d5464f6
all runs: OK
# git bisect good 1592c4b9935fa8a3b7c297955bb872a357e5a3b6
Bisecting: 6274 revisions left to test after this (roughly 13 steps)
[763dafc520add02a1f4639b500c509acc0ea8e5b] audit: check the length of userspace generated audit records

testing commit 763dafc520add02a1f4639b500c509acc0ea8e5b with gcc (GCC) 8.4.1 20210217
kernel signature: ace9ac6f06b11fcef4ac109265f3f2548af54432288be9c132737d464c03b13e
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 763dafc520add02a1f4639b500c509acc0ea8e5b
Bisecting: 6274 revisions left to test after this (roughly 13 steps)
[377f16ac67237c8cda05daf363bcbea95212b000] xfs: factor out a xfs_attr_match helper

testing commit 377f16ac67237c8cda05daf363bcbea95212b000 with gcc (GCC) 8.4.1 20210217
kernel signature: 251416ea96ae2a0a31196d97ecd073cdde1fd99a5c4789775e2aaa86d6191b4a
run #0: OK
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: boot failed: can't ssh into the instance
# git bisect good 377f16ac67237c8cda05daf363bcbea95212b000
Bisecting: 6274 revisions left to test after this (roughly 13 steps)
[a72d2401f54b7db41c77ab971238a06eafe929fb] gfs2: Allow some glocks to be used during withdraw

testing commit a72d2401f54b7db41c77ab971238a06eafe929fb with gcc (GCC) 8.4.1 20210217
kernel signature: 238f4b428341e59b3e1b5106508b9619cb5add7cb6b88d9501de12d653e8fda4
all runs: OK
# git bisect good a72d2401f54b7db41c77ab971238a06eafe929fb
Bisecting: 6274 revisions left to test after this (roughly 13 steps)
[5fc0df93fccd4dc8412bfc488ba4ba8268aa12dc] Merge v5.6 into drm-next

testing commit 5fc0df93fccd4dc8412bfc488ba4ba8268aa12dc with gcc (GCC) 8.4.1 20210217
kernel signature: da9f3125ce32e82c473ff6d8591cadbb203141ab02651cddb817b068974e4359
all runs: OK
# git bisect good 5fc0df93fccd4dc8412bfc488ba4ba8268aa12dc
Bisecting: 5319 revisions left to test after this (roughly 13 steps)
[848960e576dafc8ed54c691b2f70b92e1fdea9ba] Merge tag 'sound-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

testing commit 848960e576dafc8ed54c691b2f70b92e1fdea9ba with gcc (GCC) 8.4.1 20210217
kernel signature: e9227e4112b3b10118263e8fb1cb5d512d06ea248538c450862c4b689be4a6f9
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 848960e576dafc8ed54c691b2f70b92e1fdea9ba
Bisecting: 5319 revisions left to test after this (roughly 13 steps)
[2f5ab6225fa2bd1435a65e9a2c5503e5b5cf4b45] Merge tag 'docs-5.6-fixes' into docs-next

testing commit 2f5ab6225fa2bd1435a65e9a2c5503e5b5cf4b45 with gcc (GCC) 8.4.1 20210217
kernel signature: 30ee835c123bc78a85937e1cdbc7b8cc6e18a606b58301d599fb74a46cb487e1
all runs: OK
# git bisect good 2f5ab6225fa2bd1435a65e9a2c5503e5b5cf4b45
Bisecting: 5319 revisions left to test after this (roughly 13 steps)
[0830c0a4891f9de009dfaa585dfecefa4c67795b] Bluetooth: hci_h5: Move variable into local scope

testing commit 0830c0a4891f9de009dfaa585dfecefa4c67795b with gcc (GCC) 8.4.1 20210217
kernel signature: ea286e5fd7ffa4e6523d10325d2c3e0fc5fa771a113abda6ba228980c49f8695
all runs: OK
# git bisect good 0830c0a4891f9de009dfaa585dfecefa4c67795b
Bisecting: 5319 revisions left to test after this (roughly 13 steps)
[7f218319caaaf6f2a43b22d8c82b898f32b4ec70] Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity

testing commit 7f218319caaaf6f2a43b22d8c82b898f32b4ec70 with gcc (GCC) 8.4.1 20210217
kernel signature: 424496e691437cfed456453417ab23c61e1111df3a1dd472fc5cf44225e5e985
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 7f218319caaaf6f2a43b22d8c82b898f32b4ec70
Bisecting: 5319 revisions left to test after this (roughly 13 steps)
[ec06dc15c358d3f41e9fd05872d772ed0f9fa32a] ASoC: dapm: select sleep_state when initializing PINCTRL widget

testing commit ec06dc15c358d3f41e9fd05872d772ed0f9fa32a with gcc (GCC) 8.4.1 20210217
kernel signature: 99767b2e23688c970997d1633611c0b7dc3f365691501f0a8c8b42b0bfd33e30
all runs: OK
# git bisect good ec06dc15c358d3f41e9fd05872d772ed0f9fa32a
Bisecting: 5319 revisions left to test after this (roughly 12 steps)
[d84edddc447df2d87e6ce9fbf94d95225504ab32] iommu/omap: Fix -Woverflow warnings when compiling on 64-bit architectures

testing commit d84edddc447df2d87e6ce9fbf94d95225504ab32 with gcc (GCC) 8.4.1 20210217
kernel signature: 76704baf102c22b5c28d6a44ef15af62f06dd54f1536fdafa56a4d0ba1b70789
all runs: OK
# git bisect good d84edddc447df2d87e6ce9fbf94d95225504ab32
Bisecting: 5316 revisions left to test after this (roughly 12 steps)
[a3434a497a2f33324e0f47bc1500a400959b4b25] ASoC: jz4740-i2s: Add support for the JZ4770

testing commit a3434a497a2f33324e0f47bc1500a400959b4b25 with gcc (GCC) 8.4.1 20210217
kernel signature: 3fd5532f65886a63c4841941b0d44cf1eb05278a1235d059d6feb2e8b5e65067
all runs: OK
# git bisect good a3434a497a2f33324e0f47bc1500a400959b4b25
Bisecting: 5316 revisions left to test after this (roughly 12 steps)
[0be44352071dc87a4f9bf879642b1d44876971d9] KVM: x86/mmu: Reuse the current root if possible for fast switch

Reproducer flagged being flaky
revisions tested: 29, total time: 8h10m13.915363198s (build: 3h15m3.350429535s, test: 4h49m1.232029768s)
error: bisection is taking too long (>8h0m0s), aborting