syzbot


WARNING: bad unlock balance in ucma_event_handler
Status: fixed on 2020/05/10 10:42
Reported-by: syzbot+e5579222b6a3edd96522@syzkaller.appspotmail.com
Fix commit: 7c11910783a1 RDMA/ucma: Put a lock around every call to the rdma_cm layer
First crash: 1299d, last: 609d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: possible deadlock in ucma_migrate_id (log)
Repro: C syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING: bad unlock balance in ucma_event_handler C inconclusive 2 210d 706d 0/1 upstream: reported C repro on 2020/01/02 01:32
linux-4.19 WARNING: bad unlock balance in ucma_event_handler C error 13 62d 792d 0/1 upstream: reported C repro on 2019/10/08 08:22

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/12/11 11:58 upstream 6794862a16ef e30d3b52 .config log report syz C
Crashes (143):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/01/02 03:35 upstream 738d2902773e 25a0186e .config log report syz C
ci-upstream-kasan-gce 2020/01/02 01:53 upstream 738d2902773e 25a0186e .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/01/02 01:37 upstream 738d2902773e 25a0186e .config log report syz C
ci-upstream-kasan-gce-selinux-root 2018/09/07 02:23 upstream ca16eb342ebe e30d3b52 .config log report syz C
ci-upstream-kasan-gce-root 2018/06/18 22:51 upstream 9ffc59d57228 45c54f75 .config log report syz C
ci-upstream-kasan-gce-root 2018/05/20 02:52 upstream 0b449a441dac f48c20b8 .config log report syz C
ci-upstream-kasan-gce 2018/05/19 16:44 upstream 73fcb1a370c7 849705db .config log report syz C
ci-upstream-kasan-gce 2018/05/19 14:57 upstream 73fcb1a370c7 849705db .config log report syz C
ci-upstream-kasan-gce-root 2018/05/19 13:58 upstream 73fcb1a370c7 849705db .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/01/08 07:22 linux-next 264673852033 6738e0b3 .config log report syz C
ci-upstream-kasan-gce-smack-root 2018/09/12 22:18 upstream 96eddb810b14 71907daf .config log report syz
ci-upstream-kasan-gce-root 2018/09/07 01:54 upstream ca16eb342ebe e30d3b52 .config log report syz
ci-upstream-kasan-gce-386 2020/01/02 01:39 upstream 738d2902773e 25a0186e .config log report syz
ci-upstream-kasan-gce-386 2018/06/18 22:41 upstream 9ffc59d57228 45c54f75 .config log report syz
ci-upstream-kasan-gce-386 2018/05/19 07:17 upstream 2c71d338bef2 849705db .config log report syz
ci-upstream-linux-next-kasan-gce-root 2018/09/10 13:36 linux-next f2b6e66e9885 6b5120a4 .config log report syz
ci-upstream-kasan-gce-selinux-root 2020/04/07 21:23 upstream 763dede1b248 db9bcd4b .config log report
ci-upstream-kasan-gce 2020/01/26 23:31 upstream a45ea48e2bcd dd56146d .config log report
ci-upstream-kasan-gce-root 2020/01/26 11:09 upstream 2821e26f3a0a f4e7270e .config log report
ci-qemu-upstream 2020/01/10 14:59 upstream bef1d88263ff 532ec44e .config log report
ci-upstream-kasan-gce 2019/10/09 18:28 upstream e3280b54afed 312c6a5a .config log report
ci-upstream-kasan-gce 2019/09/22 19:26 upstream f7c3bf8fa7e5 d96e88f3 .config log report
ci-upstream-kasan-gce 2019/06/10 17:04 upstream d1fdb6d8f6a4 0159583c .config log report
ci-upstream-kasan-gce 2019/04/02 12:29 upstream 5e7a8ca31926 dfd3394d .config log report
ci-upstream-kasan-gce-root 2019/02/12 19:36 upstream aa0c38cf39de 6ecc6d0f .config log report
ci-upstream-kasan-gce 2019/01/27 06:22 upstream ba6069759381 c73f090a .config log report
ci-upstream-kasan-gce 2019/01/26 15:17 upstream ba6069759381 c73f090a .config log report
ci-upstream-kasan-gce-root 2019/01/25 04:58 upstream c04e2a780caf bfab9cd8 .config log report
ci-upstream-kasan-gce 2019/01/10 15:03 upstream ba422731316d db9b6579 .config log report
ci-upstream-kasan-gce 2019/01/01 12:56 upstream e1ef035d272e 3d85f48c .config log report
ci-upstream-kasan-gce 2018/12/16 15:51 upstream 6531e115b7ab def91db3 .config log report
ci-upstream-kasan-gce-root 2018/12/13 08:58 upstream f5d582777bcb 02613a41 .config log report
ci-upstream-kasan-gce 2018/12/05 20:19 upstream d08970904582 ac6c0578 .config log report
ci-upstream-kasan-gce 2018/12/05 14:11 upstream 0072a0c14d5b ac6c0578 .config log report
ci-upstream-kasan-gce 2018/12/05 07:54 upstream 0072a0c14d5b f162ad97 .config log report
ci-upstream-kasan-gce-root 2018/11/27 22:46 upstream ef78e5ec9214 4b6d14f2 .config log report
ci-upstream-kasan-gce 2018/11/17 21:13 upstream 1ce80e0fe98e adf636a8 .config log report
ci-upstream-kasan-gce 2018/10/27 08:13 upstream 345671ea0f92 a8292de9 .config log report
ci-upstream-kasan-gce-smack-root 2018/10/25 15:30 upstream bd6bf7c10484 a8292de9 .config log report
ci-upstream-kasan-gce 2018/10/25 08:17 upstream 01aa9d518eae a8292de9 .config log report
ci-upstream-kasan-gce 2018/10/17 19:14 upstream c0cff31be705 1ba7fd7e .config log report
ci-upstream-kasan-gce 2018/10/14 00:04 upstream 7ec21823634d caf12900 .config log report
ci-upstream-kasan-gce 2018/10/12 16:33 upstream 6b3944e42e2e caf12900 .config log report
ci-upstream-kasan-gce-selinux-root 2018/10/03 02:26 upstream 1d2ba7fee28b 0f3e0261 .config log report
ci-upstream-kasan-gce-smack-root 2018/10/02 02:33 upstream 385afbf8c3e8 e06f7713 .config log report
ci-upstream-kasan-gce 2018/10/01 19:31 upstream 17b57b1883c1 48a50c6b .config log report
ci-upstream-kasan-gce-root 2018/09/24 04:30 upstream 6bf4ca7fbc85 28d9ac76 .config log report
ci-upstream-kasan-gce-selinux-root 2018/09/23 20:07 upstream 6bf4ca7fbc85 28d9ac76 .config log report
ci-upstream-kasan-gce-386 2020/04/02 13:44 upstream 919dce24701f a34e2c33 .config log report
ci-upstream-kasan-gce-386 2020/01/01 14:59 upstream 738d2902773e 25a0186e .config log report
ci-upstream-kasan-gce-386 2019/06/08 14:18 upstream 79c3ba3206c7 0159583c .config log report
ci-upstream-kasan-gce-386 2019/04/05 08:03 upstream 8e22ba96d44c e5d1b3ac .config log report
ci-upstream-kasan-gce-386 2019/03/03 05:13 upstream c93d9218ea56 1c0e457a .config log report
ci-upstream-kasan-gce-386 2018/11/29 08:22 upstream 60b548237fed 4b6d14f2 .config log report
ci-upstream-kasan-gce-386 2018/11/14 06:15 upstream ccda4af0f4b9 5f5f6d14 .config log report
ci-upstream-kasan-gce-386 2018/10/19 04:42 upstream fa520c47eaa1 9aba67b5 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/02/26 02:44 linux-next bdc5461b23ca 59b57593 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/02/05 17:08 linux-next 2747d5fdab78 662cf49a .config log report
ci-upstream-linux-next-kasan-gce-root 2019/03/24 20:04 linux-next e382d91f5f80 acbc5b7d .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/21 11:19 linux-next a790195efddd badbbeee .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/13 05:09 linux-next b808822a75a3 c3f3344c .config log report
ci-upstream-linux-next-kasan-gce-root 2018/11/13 20:28 linux-next 442b8cea2477 5f5f6d14 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/16 09:23 linux-next 6d5d82417dd6 8cd30605 .config log report