bisecting fixing commit since 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf building syzkaller on 510951950dc0ee69cfdaf746061d3dbe31b49fd8 testing commit 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf with gcc (GCC) 8.1.0 kernel signature: dd5bcac7cc69ce310218a7047caa021b7c1d910e1bc1c63dcba8123abee9efe9 all runs: crashed: INFO: rcu detected stall in tipc_release testing current HEAD 5ee88057889bbca5f5bb96031b62b3756b33e164 testing commit 5ee88057889bbca5f5bb96031b62b3756b33e164 with gcc (GCC) 8.1.0 kernel signature: 63519b87bfc620dba4589e5d487e0bec440f2a103c588859da4d35c6598001a2 all runs: OK # git bisect start 5ee88057889bbca5f5bb96031b62b3756b33e164 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf Bisecting: 24653 revisions left to test after this (roughly 15 steps) [93b694d096cc10994c817730d4d50288f9ae3d66] Merge tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm testing commit 93b694d096cc10994c817730d4d50288f9ae3d66 with gcc (GCC) 8.1.0 kernel signature: 8180b8812ef58e5ca7b8c39983c5742718687475aa9c5b677991a1445119cca6 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in tipc_release run #2: crashed: INFO: rcu detected stall in tipc_release run #3: crashed: INFO: rcu detected stall in tipc_release run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in tipc_release run #6: crashed: INFO: rcu detected stall in tipc_release run #7: crashed: INFO: rcu detected stall in tipc_release run #8: crashed: INFO: rcu detected stall in tipc_release run #9: crashed: INFO: rcu detected stall in tipc_release # git bisect good 93b694d096cc10994c817730d4d50288f9ae3d66 Bisecting: 12316 revisions left to test after this (roughly 14 steps) [1d36dffa5d887715dacca0f717f4519b7be5e498] Merge tag 'drm-next-2020-12-11' of git://anongit.freedesktop.org/drm/drm testing commit 1d36dffa5d887715dacca0f717f4519b7be5e498 with gcc (GCC) 8.1.0 kernel signature: 520d816272744664a62679e01db0da87daf015311ea37754cd0d345fce692963 run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release run #2: crashed: INFO: rcu detected stall in tipc_release 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 1d36dffa5d887715dacca0f717f4519b7be5e498 Bisecting: 6178 revisions left to test after this (roughly 13 steps) [8958b2491104d7f254cff0698505392582dbc13a] mm: fix some spelling mistakes in comments testing commit 8958b2491104d7f254cff0698505392582dbc13a with gcc (GCC) 8.1.0 kernel signature: 49a9bd7a7af631e92f21c6ab2a3a93992709132ddaf815c2831e79da63299bf4 run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release 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 good 8958b2491104d7f254cff0698505392582dbc13a Bisecting: 3089 revisions left to test after this (roughly 12 steps) [7ddcdea5b54492f54700f427f58690cf1e187e5e] tools headers UAPI: Sync linux/const.h with the kernel headers testing commit 7ddcdea5b54492f54700f427f58690cf1e187e5e with gcc (GCC) 8.1.0 kernel signature: f88163868b211ce9debf9d6263774bd04b4438a680b125f6352ad2d2c36b9c61 all runs: OK # git bisect bad 7ddcdea5b54492f54700f427f58690cf1e187e5e Bisecting: 1540 revisions left to test after this (roughly 11 steps) [278f54c46164e9859090dde7e4ceede830c6beb6] Merge tag 'mfd-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd testing commit 278f54c46164e9859090dde7e4ceede830c6beb6 with gcc (GCC) 8.1.0 kernel signature: 2e9bae8e4b3df6feb8ac2467f2ac59ffed158e8de4c90a4afcef6e99aff28b4a all runs: OK # git bisect bad 278f54c46164e9859090dde7e4ceede830c6beb6 Bisecting: 786 revisions left to test after this (roughly 10 steps) [005b2a9dc819a1265a8c765595f8f6d88d6173d9] Merge tag 'tif-task_work.arch-2020-12-14' of git://git.kernel.dk/linux-block testing commit 005b2a9dc819a1265a8c765595f8f6d88d6173d9 with gcc (GCC) 8.1.0 kernel signature: faefc745d0baa09ecc302a2abcaafb1af23a6912e8f62553016085694df70878 all runs: OK # git bisect bad 005b2a9dc819a1265a8c765595f8f6d88d6173d9 Bisecting: 345 revisions left to test after this (roughly 9 steps) [1a50ede2b3c846761a71c409f53e9121311a13c2] Merge tag 'nfsd-5.11' of git://git.linux-nfs.org/projects/cel/cel-2.6 testing commit 1a50ede2b3c846761a71c409f53e9121311a13c2 with gcc (GCC) 8.1.0 kernel signature: 64d005386853efd82c100181dd5646a739c33a94666c45543c7fd8cb12ab247b run #0: OK run #1: OK run #2: OK run #3: OK run #4: OK run #5: crashed: INFO: rcu detected stall in tipc_release run #6: OK run #7: OK run #8: OK run #9: OK # git bisect good 1a50ede2b3c846761a71c409f53e9121311a13c2 Bisecting: 173 revisions left to test after this (roughly 8 steps) [3d5de2ddc6ba924d7c10460a1dc3aae8786b9d52] Merge tag 'audit-pr-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit testing commit 3d5de2ddc6ba924d7c10460a1dc3aae8786b9d52 with gcc (GCC) 8.1.0 kernel signature: c6551ef67efd894c1c379a31e13d1c067f3228b738f1e9b67896c5f356955ab8 run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release 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 good 3d5de2ddc6ba924d7c10460a1dc3aae8786b9d52 Bisecting: 102 revisions left to test after this (roughly 7 steps) [ad4fddef5f2345aa9214e979febe2f47639c10d9] mips: fix Section mismatch in reference testing commit ad4fddef5f2345aa9214e979febe2f47639c10d9 with gcc (GCC) 8.1.0 kernel signature: 9c7d91a5f14c72ab0d04f4e18897edf098231a1cee9ac8a7f18d2502cf06bf0a run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release run #2: crashed: INFO: rcu detected stall in tipc_release run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in tipc_release run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in tipc_release run #7: crashed: INFO: rcu detected stall in tipc_release run #8: crashed: INFO: rcu detected stall in tipc_release run #9: OK # git bisect good ad4fddef5f2345aa9214e979febe2f47639c10d9 Bisecting: 48 revisions left to test after this (roughly 6 steps) [571b12dd1ad41f371448b693c0bd2e64968c7af4] Merge tag 'hyperv-next-signed-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux testing commit 571b12dd1ad41f371448b693c0bd2e64968c7af4 with gcc (GCC) 8.1.0 kernel signature: c60c5be506e72015a744631684fbe869028605e24b92190d6485d023671bd9e7 run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release run #2: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor511594654" "root@10.128.15.201:./syz-executor511594654"]: exit status 1 ssh: connect to host 10.128.15.201 port 22: Connection timed out lost connection run #3: OK run #4: OK run #5: OK run #6: crashed: INFO: rcu detected stall in tipc_release run #7: crashed: INFO: rcu detected stall in tipc_release run #8: OK run #9: OK # git bisect good 571b12dd1ad41f371448b693c0bd2e64968c7af4 Bisecting: 24 revisions left to test after this (roughly 5 steps) [24a31b81e38309b1604f24520110aae1f83f3cbf] riscv: add support for TIF_NOTIFY_SIGNAL testing commit 24a31b81e38309b1604f24520110aae1f83f3cbf with gcc (GCC) 8.1.0 kernel signature: aa045a2cddd861406eddc30a0bafa442335c757e3200ae0f6add280f45a6c9e0 all runs: crashed: INFO: rcu detected stall in tipc_release # git bisect good 24a31b81e38309b1604f24520110aae1f83f3cbf Bisecting: 12 revisions left to test after this (roughly 4 steps) [8312f41f08edc641aa927d31fb71319694ae9c42] Merge tag 'mips_5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux testing commit 8312f41f08edc641aa927d31fb71319694ae9c42 with gcc (GCC) 8.1.0 kernel signature: d2018d18d46739c9ea7590cee42fe16facef1943973e15d55d09be10c42cf75d run #0: OK run #1: OK run #2: crashed: INFO: rcu detected stall in tipc_release run #3: OK run #4: OK run #5: OK run #6: OK run #7: crashed: INFO: rcu detected stall in tipc_release run #8: OK run #9: OK # git bisect good 8312f41f08edc641aa927d31fb71319694ae9c42 Bisecting: 6 revisions left to test after this (roughly 3 steps) [355fb9e2b78e78b38ec00f5cd9b05c6aceb98335] io_uring: remove 'twa_signal_ok' deadlock work-around testing commit 355fb9e2b78e78b38ec00f5cd9b05c6aceb98335 with gcc (GCC) 8.1.0 kernel signature: 2550bc8ffdf7d9f84a9fc2e4d349f9075362f77b26f68e103aa8fe15aa300e05 all runs: OK # git bisect bad 355fb9e2b78e78b38ec00f5cd9b05c6aceb98335 Bisecting: 2 revisions left to test after this (roughly 2 steps) [792ee0f6db5b942ee68ee7c9aea9d34dde4c4ff2] io_uring: JOBCTL_TASK_WORK is no longer used by task_work testing commit 792ee0f6db5b942ee68ee7c9aea9d34dde4c4ff2 with gcc (GCC) 8.1.0 kernel signature: 10e8cc8b895cde7c24c98833c3299582b19178cf5bab4083807396d38c46f82a run #0: crashed: INFO: rcu detected stall in tipc_release run #1: crashed: INFO: rcu detected stall in tipc_release run #2: crashed: INFO: rcu detected stall in tipc_release run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in tipc_release run #5: crashed: INFO: rcu detected stall in tipc_release run #6: crashed: INFO: rcu detected stall in tipc_release run #7: crashed: INFO: rcu detected stall in tipc_release run #8: crashed: INFO: rcu detected stall in corrupted run #9: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor247892856" "root@10.128.15.194:./syz-executor247892856"]: exit status 1 ssh: connect to host 10.128.15.194 port 22: Connection timed out lost connection # git bisect good 792ee0f6db5b942ee68ee7c9aea9d34dde4c4ff2 Bisecting: 0 revisions left to test after this (roughly 1 step) [e296dc4996b8094ccde45d19090d804c4103513e] kernel: remove checking for TIF_NOTIFY_SIGNAL testing commit e296dc4996b8094ccde45d19090d804c4103513e with gcc (GCC) 8.1.0 kernel signature: 76c7b008bd14aaa55254c652c744c1ee95b860eedea624c934f104344d1f978f all runs: OK # git bisect bad e296dc4996b8094ccde45d19090d804c4103513e Bisecting: 0 revisions left to test after this (roughly 0 steps) [98b89b649fce39dacb9dc036d6d0fdb8caff73f7] signal: kill JOBCTL_TASK_WORK testing commit 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 with gcc (GCC) 8.1.0 kernel signature: 428c5d19402243931647a86a60477eb25dec2c66d7f4d5dbab21d8a7e8a82da1 all runs: OK # git bisect bad 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 is the first bad commit commit 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 Author: Jens Axboe Date: Fri Oct 9 16:03:01 2020 -0600 signal: kill JOBCTL_TASK_WORK It's no longer used, get rid of it. Signed-off-by: Jens Axboe include/linux/sched/jobctl.h | 4 +--- kernel/signal.c | 20 -------------------- 2 files changed, 1 insertion(+), 23 deletions(-) culprit signature: 428c5d19402243931647a86a60477eb25dec2c66d7f4d5dbab21d8a7e8a82da1 parent signature: 10e8cc8b895cde7c24c98833c3299582b19178cf5bab4083807396d38c46f82a Reproducer flagged being flaky revisions tested: 18, total time: 4h39m9.851757111s (build: 1h32m35.104816111s, test: 3h4m21.082399143s) first good commit: 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 signal: kill JOBCTL_TASK_WORK recipients (to): ["axboe@kernel.dk" "linux-kernel@vger.kernel.org"] recipients (cc): ["axboe@kernel.dk" "christian.brauner@ubuntu.com" "ebiederm@xmission.com" "oleg@redhat.com" "pcc@google.com" "peterz@infradead.org"]