bisecting cause commit starting from 34816d20f173a90389c8a7e641166d8ea9dce70a building syzkaller on e6b0d3140b98e8456fbd089d584e932e19257d94 testing commit 34816d20f173a90389c8a7e641166d8ea9dce70a with gcc (GCC) 8.1.0 kernel signature: 916eb51ad5f93857065ebcd4e5abcaf35c558f797bf91c74ee41f5448d219432 run #0: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.9 testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 8.1.0 kernel signature: ad26947ba0cbd73c19f717edb55aa6cd6598fdd9205215e2bf7a994a142d15f3 run #0: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0 kernel signature: 86887bba36ce220787b68268012b476e2e65182301edcef00380f38caa109173 run #0: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0 kernel signature: 881cba35de6712894c4e57eb826bf64609acbd3e1962f412767601e83f4c28b9 run #0: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0 kernel signature: 6bf0032ba83765f35f719328e3cccf0b322c74cd85d01a97b8c5c5befbf51bc6 run #0: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0 kernel signature: 3af795f893fdf0a61ab0151e4c25e390006e70bdbcf66dc83b7377c1a69cf8e3 run #0: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0 kernel signature: 5e176434dc5b442289076c4b26dec486802078fd3054f8e99f3b5f69f82dc5e8 run #0: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 kernel signature: 121ab024ac0ff6f6f74070ae75cc89a70c77aae17d8ec08321514667bc83f4ca run #0: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 kernel signature: ea24e4da1f46a1d21ce2e53dde6ad0b1066d26e0914b6499419d9fca9b8723d4 run #0: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 kernel signature: 9e15330394d4026be3f18448b5d1ecc7883d3f6258c2650c7d20ca601e6f6a22 run #0: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 kernel signature: 5e6ef45b85d68806f959bf450e6af3fd3dc8a21ad764280a7f077a4d6c087b00 run #0: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 kernel signature: 6a73d0eade097aa45a6fe4979dbeb0297797b0513bb7075a389adee144c11d1a all runs: OK # git bisect start 1c163f4c7b3f621efff9b28a47abb36f7378d783 8fe28cb58bcb235034b64cbbb7550a8a43fd88be Bisecting: 7011 revisions left to test after this (roughly 13 steps) [af7ddd8a627c62a835524b3f5b471edbbbcce025] Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping testing commit af7ddd8a627c62a835524b3f5b471edbbbcce025 with gcc (GCC) 8.1.0 kernel signature: 671c5518da8b0a9d8ab4d9d616d6f071e2c1ce062f94edf18597d38566157dc3 all runs: OK # git bisect good af7ddd8a627c62a835524b3f5b471edbbbcce025 Bisecting: 3532 revisions left to test after this (roughly 12 steps) [c9bef4a651769927445900564781a9c99fdf6258] Merge tag 'pinctrl-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl testing commit c9bef4a651769927445900564781a9c99fdf6258 with gcc (GCC) 8.1.0 kernel signature: 5380026aea6b9f0c27bc5635289dc7aadb6c508c47f159bf65289c9bd773499e all runs: OK # git bisect good c9bef4a651769927445900564781a9c99fdf6258 Bisecting: 1768 revisions left to test after this (roughly 11 steps) [4d5f6e0201bc568c0758ed3f77a06648ec9fd482] Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi testing commit 4d5f6e0201bc568c0758ed3f77a06648ec9fd482 with gcc (GCC) 8.1.0 kernel signature: 3c5985ff351939b2997ea560392c2f8885dea9da99bb9a5a1e98bde6a3062e00 run #0: crashed: WARNING: filesystem loop2 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway # git bisect bad 4d5f6e0201bc568c0758ed3f77a06648ec9fd482 Bisecting: 881 revisions left to test after this (roughly 10 steps) [786ac51a48465da56f333652ec1d8b215bb272fe] kbuild: remove UIMAGE_IN and UIMAGE_OUT testing commit 786ac51a48465da56f333652ec1d8b215bb272fe with gcc (GCC) 8.1.0 kernel signature: 827ed3c14cb25b0794529493626adcbe139dc9d326a854a7eeedca68262febd6 run #0: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #1: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #2: crashed: WARNING: filesystem loop3 was created with 512 inodes, the real maximum is 511, mounting anyway run #3: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #4: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #5: crashed: WARNING: filesystem loop1 was created with 512 inodes, the real maximum is 511, mounting anyway run #6: crashed: WARNING: filesystem loop0 was created with 512 inodes, the real maximum is 511, mounting anyway run #7: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway run #8: crashed: WARNING: filesystem loop4 was created with 512 inodes, the real maximum is 511, mounting anyway run #9: crashed: WARNING: filesystem loop5 was created with 512 inodes, the real maximum is 511, mounting anyway # git bisect bad 786ac51a48465da56f333652ec1d8b215bb272fe Bisecting: 447 revisions left to test after this (roughly 9 steps) [6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d] Merge branch 'for-linus-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml testing commit 6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d with gcc (GCC) 8.1.0 kernel signature: c606e652e9422ddbfd776f642803008f02ab1b5037305767983d2c56b06f7993 run #0: basic kernel testing failed: general protection fault in batadv_iv_ogm_queue_add run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: crashed: WARNING in batadv_mcast_mla_update run #8: OK run #9: OK reproducer seems to be flaky # git bisect bad 6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d Bisecting: 226 revisions left to test after this (roughly 8 steps) [8e143b90e4d45cca3dc53760d3cfab988bc74571] Merge tag 'iommu-updates-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu testing commit 8e143b90e4d45cca3dc53760d3cfab988bc74571 with gcc (GCC) 8.1.0 kernel signature: 47157f79a1448e3354da49dabb74420df74fb95b0c9cca32a30dd2e9e85dccf4 all runs: OK # git bisect good 8e143b90e4d45cca3dc53760d3cfab988bc74571 Bisecting: 121 revisions left to test after this (roughly 7 steps) [85f78456f286da46fb054c7d45e4193cb757ac83] Merge tag '9p-for-4.21' of git://github.com/martinetd/linux testing commit 85f78456f286da46fb054c7d45e4193cb757ac83 with gcc (GCC) 8.1.0 kernel signature: f78f45886ab198e880c6249c2c62fa135ad369d123fccf75ae83c8007b278050 all runs: OK # git bisect good 85f78456f286da46fb054c7d45e4193cb757ac83 Bisecting: 60 revisions left to test after this (roughly 6 steps) [cb24e35b4fa8448e7ee963884958235b8de44f25] sunrpc: convert unnecessary GFP_ATOMIC to GFP_NOFS testing commit cb24e35b4fa8448e7ee963884958235b8de44f25 with gcc (GCC) 8.1.0 kernel signature: 187a1689a0fe65edce025c9e0433e431c96abe808cc9a91e29f163e4d848c6dd all runs: OK # git bisect good cb24e35b4fa8448e7ee963884958235b8de44f25 Bisecting: 31 revisions left to test after this (roughly 5 steps) [e6b92572808467f35fd159d47c45b650de29e722] Merge tag 'nfs-for-4.21-1' of git://git.linux-nfs.org/projects/anna/linux-nfs testing commit e6b92572808467f35fd159d47c45b650de29e722 with gcc (GCC) 8.1.0 kernel signature: d33e471409dfbd2f29f908d14cec8dc703a62e30c190b427c37624d46e35254e all runs: OK # git bisect good e6b92572808467f35fd159d47c45b650de29e722 Bisecting: 15 revisions left to test after this (roughly 4 steps) [b9794231737ab8c8a3a225b50aa168c4c7f9b9ec] um: writev needs testing commit b9794231737ab8c8a3a225b50aa168c4c7f9b9ec with gcc (GCC) 8.1.0 kernel signature: 2df9fe4a52148c8d47af501a63c527e18c4f5699aa390c752a4abfaea9b64c47 all runs: OK # git bisect good b9794231737ab8c8a3a225b50aa168c4c7f9b9ec Bisecting: 7 revisions left to test after this (roughly 3 steps) [98dfd32620e970eb576ebce5ea39d905cb005e72] s390/pci: fix sleeping in atomic during hotplug testing commit 98dfd32620e970eb576ebce5ea39d905cb005e72 with gcc (GCC) 8.1.0 kernel signature: e6a4183d304e3eb289e1a23a544eab2be0d0135cc09dcad0df55e7f42e800228 all runs: OK # git bisect good 98dfd32620e970eb576ebce5ea39d905cb005e72 Bisecting: 2 revisions left to test after this (roughly 2 steps) [ec10574d00da0d8b6ec9d0099410aae8aad4695a] Merge tag 'vfio-ccw-20181213' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw into features testing commit ec10574d00da0d8b6ec9d0099410aae8aad4695a with gcc (GCC) 8.1.0 kernel signature: e6a4183d304e3eb289e1a23a544eab2be0d0135cc09dcad0df55e7f42e800228 all runs: OK # git bisect good ec10574d00da0d8b6ec9d0099410aae8aad4695a Bisecting: 1 revision left to test after this (roughly 1 step) [940b241d9050fc354f68c182e99fc3da1ff36bc0] um: Remove obsolete reenable_XX calls testing commit 940b241d9050fc354f68c182e99fc3da1ff36bc0 with gcc (GCC) 8.1.0 kernel signature: 2df9fe4a52148c8d47af501a63c527e18c4f5699aa390c752a4abfaea9b64c47 all runs: OK # git bisect good 940b241d9050fc354f68c182e99fc3da1ff36bc0 Bisecting: 0 revisions left to test after this (roughly 0 steps) [04a17edeca524b71dbb5be41a7002d247fbf34c0] Merge tag 's390-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux testing commit 04a17edeca524b71dbb5be41a7002d247fbf34c0 with gcc (GCC) 8.1.0 kernel signature: c606e652e9422ddbfd776f642803008f02ab1b5037305767983d2c56b06f7993 all runs: OK # git bisect good 04a17edeca524b71dbb5be41a7002d247fbf34c0 6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d is the first bad commit commit 6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d Merge: 04a17edeca52 940b241d9050 Author: Linus Torvalds Date: Wed Jan 2 18:39:22 2019 -0800 Merge branch 'for-linus-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML updates from Richard Weinberger: - DISCARD support for our block device driver - Many TLB flush optimizations - Various smaller fixes - And most important, Anton agreed to help me maintaining UML * 'for-linus-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: Remove obsolete reenable_XX calls um: writev needs Add Anton Ivanov to UML maintainers um: remove redundant generic-y um: Optimize Flush TLB for force/fork case um: Avoid marking pages with "changed protection" um: Skip TLB flushing where not needed um: Optimize TLB operations v2 um: Remove unnecessary faulted check in uaccess.c um: Add support for DISCARD in the UBD Driver um: Remove unsafe printks from the io thread um: Clean-up command processing in UML UBD driver um: Switch to block-mq constants in the UML UBD driver um: Make GCOV depend on !KCOV um: Include sys/uio.h to have writev() um: Add HAVE_DEBUG_BUGVERBOSE um: Update maintainers file entry MAINTAINERS | 3 +- arch/um/Kconfig | 1 + arch/um/Kconfig.debug | 1 + arch/um/drivers/chan_kern.c | 10 -- arch/um/drivers/line.c | 10 -- arch/um/drivers/mconsole_kern.c | 2 - arch/um/drivers/net_kern.c | 2 - arch/um/drivers/port_kern.c | 1 - arch/um/drivers/random.c | 1 - arch/um/drivers/ubd_kern.c | 231 ++++++++++++++++++++++++-------------- arch/um/drivers/vector_user.c | 2 + arch/um/include/asm/Kbuild | 2 - arch/um/include/asm/pgtable.h | 9 +- arch/um/include/shared/irq_user.h | 1 - arch/um/include/shared/os.h | 1 + arch/um/kernel/irq.c | 6 - arch/um/kernel/sigio.c | 1 - arch/um/kernel/skas/uaccess.c | 23 ++-- arch/um/kernel/tlb.c | 115 ++++++++++++------- arch/um/os-Linux/file.c | 10 ++ 20 files changed, 259 insertions(+), 173 deletions(-) Reproducer flagged being flaky revisions tested: 26, total time: 4h59m9.95458789s (build: 2h11m6.083603757s, test: 2h44m42.707443917s) first bad commit: 6aa293d8ff0939802a6c86cee6cd152c1b0a7a0d Merge branch 'for-linus-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml recipients (to): ["torvalds@linux-foundation.org"] recipients (cc): [] crash: WARNING in batadv_mcast_mla_update team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves WARNING: CPU: 0 PID: 9394 at net/batman-adv/multicast.c:371 batadv_mcast_mla_bridge_get net/batman-adv/multicast.c:294 [inline] WARNING: CPU: 0 PID: 9394 at net/batman-adv/multicast.c:371 __batadv_mcast_mla_update net/batman-adv/multicast.c:630 [inline] WARNING: CPU: 0 PID: 9394 at net/batman-adv/multicast.c:371 batadv_mcast_mla_update+0x15ef/0x2020 net/batman-adv/multicast.c:661 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9394 Comm: kworker/u4:6 Not tainted 4.20.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_mcast_mla_update Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x86/0xca lib/dump_stack.c:113 panic+0x1e7/0x35b kernel/panic.c:189 __warn.cold.7+0x1b/0x38 kernel/panic.c:544 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x1c0 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_mcast_mla_tt_add net/batman-adv/multicast.c:371 [inline] RIP: 0010:__batadv_mcast_mla_update net/batman-adv/multicast.c:636 [inline] RIP: 0010:batadv_mcast_mla_update+0x15ef/0x2020 net/batman-adv/multicast.c:661 Code: df 4c 89 f1 48 c1 e9 03 80 3c 01 00 0f 85 2f 0a 00 00 4c 3b b5 28 fe ff ff 4c 89 f7 4d 8b 3e 0f 85 28 fc ff ff e9 50 f1 ff ff <0f> 0b e9 87 ee ff ff 40 88 b5 10 fe ff ff e8 1e c7 0f fa 0f b6 93 RSP: 0018:ffff88809fe5fb30 EFLAGS: 00010202 RAX: 0000000000000121 RBX: ffff88809fe5fd30 RCX: 1ffff11012243119 RDX: 1ffff1101396bb7c RSI: ffff8880912188a8 RDI: ffff88809121887c RBP: ffff88809fe5fd58 R08: ffff8880912188c8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809cb5dbe0 R13: ffff88809cb5d340 R14: 0000000000000000 R15: ffff88809fe5fc70 process_one_work+0x7b9/0x15a0 kernel/workqueue.c:2153 worker_thread+0x85/0xb60 kernel/workqueue.c:2296 kthread+0x324/0x3e0 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..