bisecting fixing commit since 0a50438c84363bd37fe18fe432888ae9a074dcab
building syzkaller on 6a81331a1d4c744da9204d02ec88d558f7eea9c9
testing commit 0a50438c84363bd37fe18fe432888ae9a074dcab with gcc (GCC) 10.2.1 20210217
kernel signature: bbd20a20f626436082f31925c513db2b886ee1f2ccc10cfe5a241d44ca7746ce
all runs: crashed: KASAN: use-after-free Read in dvb_usb_device_exit
testing current HEAD f88cd3fb9df228e5ce4e13ec3dbad671ddb2146e
testing commit f88cd3fb9df228e5ce4e13ec3dbad671ddb2146e with gcc (GCC) 10.2.1 20210217
kernel signature: 8bb43d400848df61b2e44a4cdf7b7ed0ba4c7ceabb1cdaa97d59923b267595ae
all runs: OK
# git bisect start f88cd3fb9df228e5ce4e13ec3dbad671ddb2146e 0a50438c84363bd37fe18fe432888ae9a074dcab
Bisecting: 8563 revisions left to test after this (roughly 13 steps)
[238da4d004856ac5f832899f6f3fa27c0102381f] Merge tag 'vfio-v5.13-rc1' of git://github.com/awilliam/linux-vfio

testing commit 238da4d004856ac5f832899f6f3fa27c0102381f with gcc (GCC) 10.2.1 20210217
kernel signature: 465c9b7b05e7d96b87ef505f24d299ee8e2046af57c6ecc1f4a2e231626d32df
all runs: OK
# git bisect bad 238da4d004856ac5f832899f6f3fa27c0102381f
Bisecting: 4129 revisions left to test after this (roughly 12 steps)
[2f9ef0559efbee18a10a3ca26eefe57f69918693] Merge tag 'docs-5.13' of git://git.lwn.net/linux

testing commit 2f9ef0559efbee18a10a3ca26eefe57f69918693 with gcc (GCC) 10.2.1 20210217
kernel signature: 0bc561989cde8172845a6da056cfc4f54c74e1d999c173d0d098d7f8173c2089
all runs: crashed: KASAN: use-after-free Read in dvb_usb_device_exit
# git bisect good 2f9ef0559efbee18a10a3ca26eefe57f69918693
Bisecting: 2594 revisions left to test after this (roughly 11 steps)
[3aa139aa9fdc138a84243dc49dc18d9b40e1c6e4] Merge tag 'media/v5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

testing commit 3aa139aa9fdc138a84243dc49dc18d9b40e1c6e4 with gcc (GCC) 10.2.1 20210217
kernel signature: 63deaa648e0619cdd1ade0da5fa76bb16b7d2baf09d9b2f167758540c8bd25c8
all runs: OK
# git bisect bad 3aa139aa9fdc138a84243dc49dc18d9b40e1c6e4
Bisecting: 771 revisions left to test after this (roughly 10 steps)
[5e6720888523eaac7c548df0d263739c56a3c22e] Merge branch 'work.coredump' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

testing commit 5e6720888523eaac7c548df0d263739c56a3c22e with gcc (GCC) 10.2.1 20210217
kernel signature: ecd30c7f3eb0bd1fd6ee6860e00f13d9c34a20436b8e3299a4bef21b2734f150
all runs: crashed: KASAN: use-after-free Read in dvb_usb_device_exit
# git bisect good 5e6720888523eaac7c548df0d263739c56a3c22e
Bisecting: 385 revisions left to test after this (roughly 9 steps)
[9172652d72f8e9a1f4d9f667dde0beec60bcde41] media: venus: venc: Add support for CLL and Mastering display controls

testing commit 9172652d72f8e9a1f4d9f667dde0beec60bcde41 with gcc (GCC) 10.2.1 20210217
kernel signature: bd6e7ae305645c9cfbd883c71336f4e622e35750b5b2bd84ac819dd51462738f
all runs: OK
# git bisect bad 9172652d72f8e9a1f4d9f667dde0beec60bcde41
Bisecting: 192 revisions left to test after this (roughly 8 steps)
[c10a3718d9555fafe9325d63b11ff76daed69c03] media: media/usb/gspca/w996Xcf.c: /** -> /*

testing commit c10a3718d9555fafe9325d63b11ff76daed69c03 with gcc (GCC) 10.2.1 20210217
kernel signature: 9ca8919eaacbb12005a2ba1dd98c787e326e59fc38a16c6f8416ad195bd88c3d
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: boot failed: WARNING in kvm_wait
# git bisect bad c10a3718d9555fafe9325d63b11ff76daed69c03
Bisecting: 96 revisions left to test after this (roughly 7 steps)
[b41e932604257d162f3f9223d8659c755b5a66a8] media: imx: capture: Decouple video node from source with MC-centric API

testing commit b41e932604257d162f3f9223d8659c755b5a66a8 with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
run #0: crashed: WARNING in kvm_wait
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
reproducer seems to be flaky
# git bisect good b41e932604257d162f3f9223d8659c755b5a66a8
Bisecting: 48 revisions left to test after this (roughly 6 steps)
[86ee6729c9b41797442f51768a676696560ecd88] media: add a subsystem profile documentation

testing commit 86ee6729c9b41797442f51768a676696560ecd88 with gcc (GCC) 10.2.1 20210217
kernel signature: 880d08032ef7c85d491a9495dee7d22d3154b7be76c55ccae60ea341494bc266
all runs: OK
# git bisect bad 86ee6729c9b41797442f51768a676696560ecd88
Bisecting: 23 revisions left to test after this (roughly 5 steps)
[67c98cb1ac7c8e7a3e1babf5d67613ee99f32269] media: imx: imx7-media-csi: Don't double-enable the CSI

testing commit 67c98cb1ac7c8e7a3e1babf5d67613ee99f32269 with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
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: WARNING in kvm_wait
# git bisect bad 67c98cb1ac7c8e7a3e1babf5d67613ee99f32269
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[3c1dbc71c6465687af2211d60673d4b52c082fd0] media: imx: imx7-media-csi: Don't lock access to is_csi2

testing commit 3c1dbc71c6465687af2211d60673d4b52c082fd0 with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
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: WARNING in kvm_wait
# git bisect bad 3c1dbc71c6465687af2211d60673d4b52c082fd0
Bisecting: 5 revisions left to test after this (roughly 3 steps)
[61c699bfb013a0f3e4378a0bf3c18450d7ef5b70] media: imx: imx7-media-csi: Create immutable link to capture device

testing commit 61c699bfb013a0f3e4378a0bf3c18450d7ef5b70 with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
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: WARNING in kvm_wait
# git bisect bad 61c699bfb013a0f3e4378a0bf3c18450d7ef5b70
Bisecting: 2 revisions left to test after this (roughly 2 steps)
[ab7d9fed90561257bc98f1593a4c337447a8efed] media: imx: capture: Support creating immutable link to capture device

testing commit ab7d9fed90561257bc98f1593a4c337447a8efed with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
run #0: crashed: WARNING in kvm_wait
run #1: crashed: WARNING in kvm_wait
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: boot failed: WARNING in kvm_wait
run #19: boot failed: WARNING in kvm_wait
# git bisect good ab7d9fed90561257bc98f1593a4c337447a8efed
Bisecting: 0 revisions left to test after this (roughly 1 step)
[fbd36bceb8160968e5edf796c449e962c6f311a5] media: imx: imx7-media-csi: Move (de)init from link setup to .s_stream()

testing commit fbd36bceb8160968e5edf796c449e962c6f311a5 with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
all runs: OK
# git bisect bad fbd36bceb8160968e5edf796c449e962c6f311a5
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[dbeecb112cb462e680a4af493ef256fa27e5997a] media: imx: imx7-media-csi: Remove control handler

testing commit dbeecb112cb462e680a4af493ef256fa27e5997a with gcc (GCC) 10.2.1 20210217
kernel signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
run #0: crashed: WARNING in kvm_wait
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: boot failed: WARNING in kvm_wait
run #19: boot failed: WARNING in kvm_wait
# git bisect good dbeecb112cb462e680a4af493ef256fa27e5997a
fbd36bceb8160968e5edf796c449e962c6f311a5 is the first bad commit
commit fbd36bceb8160968e5edf796c449e962c6f311a5
Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date:   Mon Feb 15 05:26:56 2021 +0100

    media: imx: imx7-media-csi: Move (de)init from link setup to .s_stream()
    
    There's no need to initialize the CSI every time a link is enabled (and
    de-initialize it when a link is disabled). Move initialization to
    .s_stream() instead.
    
    Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
    Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
    Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
    Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

 drivers/staging/media/imx/imx7-media-csi.c | 30 +++++++++++-------------------
 1 file changed, 11 insertions(+), 19 deletions(-)

culprit signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
parent  signature: 7ade78c5eaf5c2522e74b7e6d54912131328e2d726b284f38e964b0005be2054
Reproducer flagged being flaky
revisions tested: 16, total time: 4h21m36.178305959s (build: 2h0m40.936905747s, test: 2h18m42.940059823s)
first good commit: fbd36bceb8160968e5edf796c449e962c6f311a5 media: imx: imx7-media-csi: Move (de)init from link setup to .s_stream()
recipients (to): ["hverkuil-cisco@xs4all.nl" "laurent.pinchart@ideasonboard.com" "mchehab+huawei@kernel.org" "rmfrfs@gmail.com"]
recipients (cc): []