bisecting fixing commit since 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796 building syzkaller on 5d7b90f1af2e3bf33992b75e7fcf0bab6bf49bd6 testing commit 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796 with gcc (GCC) 8.1.0 kernel signature: 437113e1f4f8fe7ba584950bfad5cb81bc6061f5ef04c2f124231c484ca6b188 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free testing current HEAD c10b57a567e4333b9fdf60b5ec36de9859263ca2 testing commit c10b57a567e4333b9fdf60b5ec36de9859263ca2 with gcc (GCC) 8.1.0 kernel signature: a7ac1256924041111f9eb04b4585b66fee8356dcd6ea22aae73a184625d09abb all runs: OK # git bisect start c10b57a567e4333b9fdf60b5ec36de9859263ca2 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796 Bisecting: 325 revisions left to test after this (roughly 8 steps) [18a7af5cb6de5c44c3d0f6880b9d6a1d79783ad4] cifs: don't leak -EAGAIN for stat() during reconnect testing commit 18a7af5cb6de5c44c3d0f6880b9d6a1d79783ad4 with gcc (GCC) 8.1.0 kernel signature: 3e488440a424081dd35f8b92fe4d609010ff89014e20d61801338d7f7fdd41c5 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 18a7af5cb6de5c44c3d0f6880b9d6a1d79783ad4 Bisecting: 162 revisions left to test after this (roughly 7 steps) [7934f5c57db8927fad85ed09a9c2df9d7aab0459] iio: magnetometer: ak8974: Fix negative raw values in sysfs testing commit 7934f5c57db8927fad85ed09a9c2df9d7aab0459 with gcc (GCC) 8.1.0 kernel signature: 397a8f8a48d304fa39a7748c43e0c51a342ff489a82dec0a5e61d7f94036e145 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 7934f5c57db8927fad85ed09a9c2df9d7aab0459 Bisecting: 81 revisions left to test after this (roughly 6 steps) [dc0ea9b710102ef628a26663d892031a2c381549] xfrm: policy: Fix doulbe free in xfrm_policy_timer testing commit dc0ea9b710102ef628a26663d892031a2c381549 with gcc (GCC) 8.1.0 kernel signature: 26e8f3725c03881902a29750eb2a2a5025c04052ee6a6b70438d88cbdcb5e628 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good dc0ea9b710102ef628a26663d892031a2c381549 Bisecting: 40 revisions left to test after this (roughly 5 steps) [4520f06b03ae667e442da1ab9351fd28cd7ac598] Linux 4.14.175 testing commit 4520f06b03ae667e442da1ab9351fd28cd7ac598 with gcc (GCC) 8.1.0 kernel signature: 0056d8787a3773ca0a81e27326dc88041253b5b761a9a1747dd64cb759a35ddb all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 4520f06b03ae667e442da1ab9351fd28cd7ac598 Bisecting: 20 revisions left to test after this (roughly 4 steps) [982a76b0f0e1d0aa10af57bc9bcf0e578feea1a8] mlxsw: spectrum_flower: Do not stop at FLOW_ACTION_VLAN_MANGLE testing commit 982a76b0f0e1d0aa10af57bc9bcf0e578feea1a8 with gcc (GCC) 8.1.0 kernel signature: 3852d526dd9512e383ed607f7d7800d4cdc54e39b0a9375bf17e9544e612abbb all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 982a76b0f0e1d0aa10af57bc9bcf0e578feea1a8 Bisecting: 10 revisions left to test after this (roughly 3 steps) [b51bea602a48a18c980da3e7e28f917ab3b464d6] RDMA/cm: Update num_paths in cma_resolve_iboe_route error flow testing commit b51bea602a48a18c980da3e7e28f917ab3b464d6 with gcc (GCC) 8.1.0 kernel signature: 32a34994db87cae1e3d283832d9832dbc0a6a754d79bc3306ed5cd3d04022f9a all runs: OK # git bisect bad b51bea602a48a18c980da3e7e28f917ab3b464d6 Bisecting: 4 revisions left to test after this (roughly 2 steps) [596bd9d7a516dd6adefd6c326bcbb94cc2d5e64c] IB/hfi1: Call kobject_put() when kobject_init_and_add() fails testing commit 596bd9d7a516dd6adefd6c326bcbb94cc2d5e64c with gcc (GCC) 8.1.0 kernel signature: 1ac0a2155cbedac0d6570fac1dd7228b32a89ad6cc0986f1c1c10c10afa0ccf7 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 596bd9d7a516dd6adefd6c326bcbb94cc2d5e64c Bisecting: 2 revisions left to test after this (roughly 1 step) [9218bca65e3b6d946c08e8a02b860d52143dcb7c] ceph: remove the extra slashes in the server path testing commit 9218bca65e3b6d946c08e8a02b860d52143dcb7c with gcc (GCC) 8.1.0 kernel signature: 205ce48f812305c5c799f09d00a13ead9ac25e196f503813eba2c65090025a37 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 9218bca65e3b6d946c08e8a02b860d52143dcb7c Bisecting: 0 revisions left to test after this (roughly 1 step) [0da9c032adbb6f83cc7f548c5155d26c64f44d63] Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl testing commit 0da9c032adbb6f83cc7f548c5155d26c64f44d63 with gcc (GCC) 8.1.0 kernel signature: fb67b49c256f63f7a8b27df54a0c52433f2a202a2456401f607eeb08849e07aa all runs: OK # git bisect bad 0da9c032adbb6f83cc7f548c5155d26c64f44d63 Bisecting: 0 revisions left to test after this (roughly 0 steps) [4452a6c44d8836bca9452aaad1a05c21aa840949] ceph: canonicalize server path in place testing commit 4452a6c44d8836bca9452aaad1a05c21aa840949 with gcc (GCC) 8.1.0 kernel signature: ab9ca33ea4614045dbcd72e6dcd4976355ec025c07cbc1a9974828839c4d5ab2 all runs: crashed: WARNING: ODEBUG bug in rfcomm_dlc_free # git bisect good 4452a6c44d8836bca9452aaad1a05c21aa840949 0da9c032adbb6f83cc7f548c5155d26c64f44d63 is the first bad commit commit 0da9c032adbb6f83cc7f548c5155d26c64f44d63 Author: Qiujun Huang Date: Sun Mar 8 17:45:27 2020 +0800 Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl commit 71811cac8532b2387b3414f7cd8fe9e497482864 upstream. Needn't call 'rfcomm_dlc_put' here, because 'rfcomm_dlc_exists' didn't increase dlc->refcnt. Reported-by: syzbot+4496e82090657320efc6@syzkaller.appspotmail.com Signed-off-by: Qiujun Huang Suggested-by: Hillf Danton Signed-off-by: Marcel Holtmann Signed-off-by: Greg Kroah-Hartman net/bluetooth/rfcomm/tty.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) culprit signature: fb67b49c256f63f7a8b27df54a0c52433f2a202a2456401f607eeb08849e07aa parent signature: ab9ca33ea4614045dbcd72e6dcd4976355ec025c07cbc1a9974828839c4d5ab2 revisions tested: 12, total time: 2h42m40.783655328s (build: 1h40m59.705771644s, test: 1h0m25.913070211s) first good commit: 0da9c032adbb6f83cc7f548c5155d26c64f44d63 Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl cc: ["gregkh@linuxfoundation.org" "hqjagain@gmail.com" "marcel@holtmann.org"]