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