bisecting cause commit starting from 596cf45cbf6e4fa7bcb0df33e373a7d062b644b5 building syzkaller on ab342da3f9aa45e3f2d9e872576ab5cd3e3c350b testing commit 596cf45cbf6e4fa7bcb0df33e373a7d062b644b5 with gcc (GCC) 8.1.0 kernel signature: f6532028492ac97b3b2b6d2332e610ae53c8777d all runs: crashed: INFO: task hung in fb_open testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0 kernel signature: 9a2228dfa34bfa5a84864e6324ec13491a8f6dc5 all runs: crashed: INFO: task hung in fb_open testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 kernel signature: 4e384783c48fc1f210fbfa3a2f0d620c715ab857 run #0: crashed: INFO: task hung in do_fb_ioctl run #1: crashed: INFO: task hung in fb_open run #2: crashed: INFO: task hung in fb_open run #3: crashed: INFO: task hung in fb_open run #4: crashed: INFO: task hung in fb_open run #5: crashed: INFO: task hung in fb_open run #6: crashed: INFO: task hung in fb_open run #7: OK run #8: OK run #9: OK testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 kernel signature: 592b16ab9c562cdeee0578b01bb9cf61286d4c51 all runs: crashed: INFO: task hung in fb_open testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 kernel signature: 70dfe8b32d6ba36f29f644ba22994f3f0be08e71 all runs: crashed: INFO: task hung in fb_open testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 kernel signature: 815829b6e7070f78cff349f59b5e957d5460ff93 run #0: crashed: INFO: task hung in fb_open run #1: crashed: INFO: task hung in fb_open run #2: crashed: INFO: task hung in fb_open run #3: crashed: INFO: task hung in fb_open run #4: crashed: INFO: task hung in fb_open run #5: crashed: INFO: task hung in fb_open run #6: crashed: INFO: task hung in fb_open run #7: crashed: INFO: task hung in do_fb_ioctl run #8: crashed: INFO: task hung in fb_open run #9: crashed: INFO: task hung in fb_open testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 kernel signature: 04b8378f60ffff8bd12423d6feb241b769040f0f all runs: crashed: INFO: task hung in fb_open testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0 kernel signature: 2fe1a92164b4da8a454c3cb218ba0e04cd3df4d0 all runs: crashed: INFO: task hung in fb_open testing release v4.18 testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0 kernel signature: 13a01f58ab0051cb6c70002936f3d2f5a4f35df4 all runs: OK # git bisect start 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d 94710cac0ef4ee177a63b5227664b38c95bbf703 Bisecting: 7596 revisions left to test after this (roughly 13 steps) [db06f826ec12bf0701ea7fc0a3c0aa00b84417c8] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux testing commit db06f826ec12bf0701ea7fc0a3c0aa00b84417c8 with gcc (GCC) 8.1.0 kernel signature: 8fb2f32971a7d17e80269e542cdf3a7e0a45abbe run #0: crashed: no output from test machine 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 # git bisect bad db06f826ec12bf0701ea7fc0a3c0aa00b84417c8 Bisecting: 4493 revisions left to test after this (roughly 12 steps) [0a957467c5fd46142bc9c52758ffc552d4c5e2f7] x86: i8259: Add missing include file testing commit 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 with gcc (GCC) 8.1.0 kernel signature: 46d9932b0ca76825adf5539eaa886e356ca0c476 all runs: OK # git bisect good 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 Bisecting: 2289 revisions left to test after this (roughly 11 steps) [9a76aba02a37718242d7cdc294f0a3901928aa57] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next testing commit 9a76aba02a37718242d7cdc294f0a3901928aa57 with gcc (GCC) 8.1.0 kernel signature: b5275ac6a6134e0bca902357285a863ed2ce421f all runs: OK # git bisect good 9a76aba02a37718242d7cdc294f0a3901928aa57 Bisecting: 1167 revisions left to test after this (roughly 10 steps) [ef8e0ff97ae8168ffe1558a5726a8b348c8228a3] Merge tag 'drm-intel-next-2018-07-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-next testing commit ef8e0ff97ae8168ffe1558a5726a8b348c8228a3 with gcc (GCC) 8.1.0 kernel signature: 722d31c4aa93bf548cbb948c0540b645da6fe652 run #0: crashed: no output from test machine 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 # git bisect bad ef8e0ff97ae8168ffe1558a5726a8b348c8228a3 Bisecting: 560 revisions left to test after this (roughly 9 steps) [e0d018119ae82cbde32c1d4f8e9b8d8f43a3c88a] drm/v3d: Remove unnecessary dma_fence_ops. testing commit e0d018119ae82cbde32c1d4f8e9b8d8f43a3c88a with gcc (GCC) 8.1.0 kernel signature: e8cd66b14f9eb4b1231fbdc3e0843aedad196a4f all runs: boot failed: WARNING in drm_connector_init # git bisect skip e0d018119ae82cbde32c1d4f8e9b8d8f43a3c88a Bisecting: 560 revisions left to test after this (roughly 9 steps) [d6258eaa41fc531277d44fbbee670c866025bfdc] drm/amd/display: don't initialize result testing commit d6258eaa41fc531277d44fbbee670c866025bfdc with gcc (GCC) 8.1.0 kernel signature: 603350773798b579fc86802509ec1a4699217a8d all runs: OK # git bisect good d6258eaa41fc531277d44fbbee670c866025bfdc Bisecting: 269 revisions left to test after this (roughly 8 steps) [0c2fd59ae315e28f8868edf80df21a502f933fec] Merge branch 'mediatek-drm-next-4.19' of https://github.com/ckhu-mediatek/linux.git-tags into drm-next testing commit 0c2fd59ae315e28f8868edf80df21a502f933fec with gcc (GCC) 8.1.0 kernel signature: 5df89d718c69c8db15d8706f883fe046a877f60b all runs: boot failed: WARNING in drm_connector_init # git bisect skip 0c2fd59ae315e28f8868edf80df21a502f933fec Bisecting: 269 revisions left to test after this (roughly 8 steps) [3479fc248bf383549ff629c607df0486813e14fd] drm: move drv test macros out of drmP.h testing commit 3479fc248bf383549ff629c607df0486813e14fd with gcc (GCC) 8.1.0 kernel signature: 849cb50331fb45cd5f96ec22f55a8cdd5669f91a all runs: OK # git bisect good 3479fc248bf383549ff629c607df0486813e14fd Bisecting: 192 revisions left to test after this (roughly 8 steps) [05c72e77ccda89ff624108b1b59a0fc43843f343] drm/i915: Nuke the LVDS lid notifier testing commit 05c72e77ccda89ff624108b1b59a0fc43843f343 with gcc (GCC) 8.1.0 kernel signature: b1fcadbcb47d06685e789c9acc6c732944b705d0 all runs: OK # git bisect good 05c72e77ccda89ff624108b1b59a0fc43843f343 Bisecting: 97 revisions left to test after this (roughly 7 steps) [8038d2a9e6cde825be46359ad98a084da92294fe] Merge tag 'vmwgfx-next-4.19-2' of git://people.freedesktop.org/~thomash/linux into drm-next testing commit 8038d2a9e6cde825be46359ad98a084da92294fe with gcc (GCC) 8.1.0 kernel signature: 686d202478be952d3f76fee0f7d30b92707322f6 all runs: OK # git bisect good 8038d2a9e6cde825be46359ad98a084da92294fe Bisecting: 51 revisions left to test after this (roughly 6 steps) [539c475dadc430bd0f1601902fcacc1e55ffe85a] Merge tag 'drm-intel-next-2018-07-09' of git://anongit.freedesktop.org/drm/drm-intel into drm-next testing commit 539c475dadc430bd0f1601902fcacc1e55ffe85a with gcc (GCC) 8.1.0 kernel signature: d050d0932a20355e1da46925b533b6bf945b0187 all runs: boot failed: WARNING in drm_connector_init # git bisect skip 539c475dadc430bd0f1601902fcacc1e55ffe85a Bisecting: 51 revisions left to test after this (roughly 6 steps) [f4f3ec480e82fa0c8c93a02b01e46719e4985752] drm/mediatek: add DPI1 support for mutex testing commit f4f3ec480e82fa0c8c93a02b01e46719e4985752 with gcc (GCC) 8.1.0 kernel signature: 65c4e61d15c8f8d52c97406c736b48e7307a6bb7 all runs: OK # git bisect good f4f3ec480e82fa0c8c93a02b01e46719e4985752 Bisecting: 41 revisions left to test after this (roughly 5 steps) [d00ddd9da79a868264997e192f9404aef1e46ba8] drm/nouveau/kms/nv50-: allocate push buffers in vidmem on pascal testing commit d00ddd9da79a868264997e192f9404aef1e46ba8 with gcc (GCC) 8.1.0 kernel signature: 1a72f83d7de07b87efabb45d34db38b61823a489 all runs: OK # git bisect good d00ddd9da79a868264997e192f9404aef1e46ba8 Bisecting: 20 revisions left to test after this (roughly 4 steps) [108019a7e6a34df91246365066bea7cf6faf6b02] drm/pl111: Use 64-bit arithmetic instead of 32-bit testing commit 108019a7e6a34df91246365066bea7cf6faf6b02 with gcc (GCC) 8.1.0 kernel signature: 7914b3755fa92049f411c958bed240cf48e50b56 all runs: OK # git bisect good 108019a7e6a34df91246365066bea7cf6faf6b02 Bisecting: 10 revisions left to test after this (roughly 3 steps) [9bace65934e74d47e467c44765e6a202c302fe7a] drm/i915: Substitute intel_format_is_yuv() with format->is_yuv testing commit 9bace65934e74d47e467c44765e6a202c302fe7a with gcc (GCC) 8.1.0 kernel signature: f87e39df8ccd3f9b9a3fee18b2904efa6aaca791 all runs: OK # git bisect good 9bace65934e74d47e467c44765e6a202c302fe7a Bisecting: 8 revisions left to test after this (roughly 3 steps) [979c11ef39cee79d6f556091a357890962be2580] drm/sun4i: Substitute sun4i_backend_format_is_yuv() with format->is_yuv testing commit 979c11ef39cee79d6f556091a357890962be2580 with gcc (GCC) 8.1.0 kernel signature: 28cb684f76b7bb54ff7a0fd601be53d4fa278e2d run #0: crashed: no output from test machine run #1: crashed: no output from test machine run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 979c11ef39cee79d6f556091a357890962be2580 Bisecting: 0 revisions left to test after this (roughly 0 steps) [d8bd23d9936bea7184a2bce1242ea646f4906d7d] drm/rockchip: Substitute is_yuv_support() with format->is_yuv testing commit d8bd23d9936bea7184a2bce1242ea646f4906d7d with gcc (GCC) 8.1.0 kernel signature: e93972f21960a258f384c12693937494613468e8 all runs: OK # git bisect good d8bd23d9936bea7184a2bce1242ea646f4906d7d 979c11ef39cee79d6f556091a357890962be2580 is the first bad commit commit 979c11ef39cee79d6f556091a357890962be2580 Author: Ayan Kumar Halder Date: Tue Jul 17 18:13:46 2018 +0100 drm/sun4i: Substitute sun4i_backend_format_is_yuv() with format->is_yuv drm_format_info table has a field 'is_yuv' to denote if the format is yuv or not. The driver is expected to use this instead of having a function for the same purpose. Signed-off-by: Ayan Kumar halder Reviewed-by: Ville Syrjala Link: https://patchwork.freedesktop.org/patch/msgid/1531847626-22248-5-git-send-email-ayan.halder@arm.com drivers/gpu/drm/sun4i/sun4i_backend.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) kernel signature: 28cb684f76b7bb54ff7a0fd601be53d4fa278e2d previous signature: e93972f21960a258f384c12693937494613468e8 revisions tested: 26, total time: 6h47m34.903357725s (build: 2h31m16.999386351s, test: 4h13m32.667516517s) first bad commit: 979c11ef39cee79d6f556091a357890962be2580 drm/sun4i: Substitute sun4i_backend_format_is_yuv() with format->is_yuv cc: ["airlied@linux.ie" "ayan.halder@arm.com" "dri-devel@lists.freedesktop.org" "linux-arm-kernel@lists.infradead.org" "linux-kernel@vger.kernel.org" "maxime.ripard@bootlin.com" "ville.syrjala@linux.intel.com" "wens@csie.org"] crash: no output from test machine