bisecting cause commit starting from 2f111a6fd5b5297b4e92f53798ca086f7c7d33a4
building syzkaller on 55f90bc6164340898299a59bec0f8599be49a13e
testing commit 2f111a6fd5b5297b4e92f53798ca086f7c7d33a4
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a37ed767b9fe674e411bfe9303a2270082a1d43cc2d37e8fd3d9063c9b0924b1
run #0: crashed: INFO: task hung in sisusb_open
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in sisusb_open
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in sisusb_open
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in sisusb_open
run #10: crashed: INFO: task hung in usb_register_dev
run #11: crashed: INFO: task hung in usb_register_dev
run #12: crashed: INFO: task hung in usb_register_dev
run #13: crashed: INFO: task hung in usb_register_dev
run #14: crashed: INFO: task hung in usb_register_dev
run #15: crashed: INFO: task hung in usb_register_dev
run #16: crashed: INFO: task hung in usb_register_dev
run #17: crashed: INFO: task hung in usb_register_dev
run #18: crashed: INFO: task hung in usb_register_dev
run #19: crashed: INFO: task hung in usb_register_dev
testing release v5.14
testing commit 7d2a07b769330c34b4deabeed939325c77a7ec2f
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: c7d28c881d6e1b7aa23bc0fc87f336297933695a96165abbbb323bb34b5070fb
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in sisusb_open
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.13
testing commit 62fb9874f5da54fdb243003b386128037319b219
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a3f350848c051499d97d38b08ecd68385fd10c27fcfd20b06992adbce838ca3a
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in sisusb_open
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in sisusb_open
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.12
testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a582ba57c90942cc23dc503cc2d3521e3eb7164c0b908d509e1b1c98ca2f1a23
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in sisusb_open
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in sisusb_open
run #6: crashed: INFO: task hung in sisusb_open
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f2d6b5fde1fff249cf072f4a3dcbd50c9d695d70b44443dd8de36d226be8bfa9
run #0: crashed: INFO: task hung in sisusb_open
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in sisusb_open
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in sisusb_open
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 61d97cb1d078313701cfe2afabd9bd1d17b4a6404783678afeee88f7e9d63bb6
all runs: crashed: INFO: task hung in usb_register_dev
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f7a80ab1f7fa2bf20520c6b2ad67c3f4b86108c37117ffb2b3d65db4eec64ebc
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in sisusb_open
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in sisusb_open
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in sisusb_open
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in sisusb_open
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in sisusb_open
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c
compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b1dbc3f7ed501f704f2b0faab2b32ccd6a7aa95eff56937ae2b75339fa5d7aff
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in sisusb_open
run #3: crashed: INFO: task hung in sisusb_open
run #4: crashed: INFO: task hung in sisusb_open
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: ed79597d511455bc16e4b35894356d0f5dda501833b1b73bc59970453253f88e
run #0: crashed: INFO: task hung in usb_register_dev
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in sisusb_open
run #3: crashed: INFO: task hung in sisusb_open
run #4: crashed: INFO: task hung in sisusb_open
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in sisusb_open
run #7: crashed: INFO: task hung in sisusb_open
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4c8ebaac554bef6288f1d2411995413e344e8b380f330d307297d6b0268a59f3
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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a7b8df9a07e96d371df0775d4306dff25d24e124beca6df2681faf405c938f0b
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 260e57da7fac6bab5a3c14143d732b9132663808205b142a4b1b82d8341ed464
all runs: OK
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ace78281ce60b6b81a4792e48e8c8a3e44dc4a22f006cd576fe1e3a36e9aa6db
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 81262375d6e2230d23ac23a5cb00be14e31bb4250b256dd66cade3c0143700bf
all runs: crashed: INFO: task hung in corrupted
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2806f3b59c59f13085036ebb41545b30abb7f70c2544314bdbb6c6f2506cf0b5
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fe7a9b06631a6c46af384c6f740895735dc582366b29d2c9ab779af6a642a028
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
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a478d7e3520ac4bd71af4862ef459f1a01dfab3bf40b90df19a618c68c545583
all runs: crashed: INFO: task hung in corrupted
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0f5b100df5051bcf9b26b13d2a753c953880f780cb0aaa449cb8c97c90678045
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0cda8b774ad01ea72c2d8c42c6b79b6102cd4eb7d6d5448b0e4e0159dd66f6e6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 31e086da95b3f6fdadfb9509d9b8f4076dd26613d197ff4b23d0f4c99e5a9f17
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
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 573ffff24d0774c6a63334e249d4e00291551c8cb7221fd3139158dca3545eb6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 96181ee4b4bda5b0c055eb34e5c0f88f1cc530fbe4607c97de75de98dbb4873e
all runs: OK
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 92ad8f539ecbecd73d896cb9d8da54eeb015c02e1d73ff8d7126271ef0aeaeca
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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2629a9bac244020d3c9c716440c0c0b20237670dae92a753de5c6572ceb69d65
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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 632d48d7a22229630f6fbd26c3fd308b76684786d6a2b9560361a8e87c8bfac5
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 12005ee08d7d7cdfac632e7b9ae75f61cf337c94025b4cf15c96b7f46c56bfc0
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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 90f9e2bf50a9fbbbb44145f293c66cc50af706954b3d44ace0e6839482b7b235
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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 79da708e8bba98807e5cc29247a5a0e580518e30e97a145feb1f82203ca9bbb5
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(NUM,NUM)
# 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
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bc65800fe447c66b582a96a3c0f6d09409f486bae9f39c5ee7f874c3c4641860
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

revisions tested: 29, total time: 8h4m33.027446762s (build: 3h7m17.275821744s, test: 4h53m6.085882521s)
error: bisection is taking too long (>8h0m0s), aborting