bisecting cause commit starting from 0044cdeb731313f20b63cb5644de7588731de32b building syzkaller on 2f93b54f26aa40233a0a584ce8714e55c8dd159a testing commit 0044cdeb731313f20b63cb5644de7588731de32b with gcc (GCC) 8.1.0 all runs: crashed: general protection fault in skb_unlink testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in skb_unlink run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in requeue_rx_msgs run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in skb_unlink run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.15 testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in requeue_rx_msgs run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in requeue_rx_msgs run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in requeue_rx_msgs run #7: crashed: general protection fault in requeue_rx_msgs run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in requeue_rx_msgs run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in skb_unlink run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in skb_unlink run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in requeue_rx_msgs run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0 all runs: crashed: general protection fault in skb_unlink testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0 all runs: crashed: general protection fault in skb_unlink testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 all runs: crashed: general protection fault in skb_unlink testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 run #0: crashed: general protection fault in skb_unlink run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in requeue_rx_msgs run #6: crashed: general protection fault in skb_unlink run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 all runs: crashed: general protection fault in skb_unlink testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 run #0: crashed: general protection fault in requeue_rx_msgs run #1: crashed: general protection fault in skb_unlink run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in skb_unlink run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in skb_unlink run #9: crashed: general protection fault in skb_unlink testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 run #0: crashed: general protection fault in skb_unlink run #1: crashed: general protection fault in requeue_rx_msgs run #2: crashed: general protection fault in skb_unlink run #3: crashed: general protection fault in skb_unlink run #4: crashed: general protection fault in skb_unlink run #5: crashed: general protection fault in skb_unlink run #6: crashed: general protection fault in skb_unlink run #7: crashed: general protection fault in skb_unlink run #8: crashed: general protection fault in requeue_rx_msgs run #9: crashed: general protection fault in requeue_rx_msgs testing release v4.5 testing commit b562e44f507e863c6792946e4e1b1449fbbac85d with gcc (GCC) 5.5.0 all runs: OK # git bisect start 2dcd0af568b0cf583645c8a317dd12e344b1c72a b562e44f507e863c6792946e4e1b1449fbbac85d Bisecting: 8131 revisions left to test after this (roughly 13 steps) [6b5f04b6cf8ebab9a65d9c0026c650bb2538fd0f] Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup testing commit 6b5f04b6cf8ebab9a65d9c0026c650bb2538fd0f with gcc (GCC) 5.5.0 all runs: OK # git bisect good 6b5f04b6cf8ebab9a65d9c0026c650bb2538fd0f Bisecting: 3735 revisions left to test after this (roughly 12 steps) [266c73b77706f2d05b4a3e70a5bb702ed35431d6] Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux testing commit 266c73b77706f2d05b4a3e70a5bb702ed35431d6 with gcc (GCC) 5.5.0 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink # git bisect bad 266c73b77706f2d05b4a3e70a5bb702ed35431d6 Bisecting: 2149 revisions left to test after this (roughly 11 steps) [33b3d2e88c9efd701b6153ca4714d4aa6e9f5af0] Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc testing commit 33b3d2e88c9efd701b6153ca4714d4aa6e9f5af0 with gcc (GCC) 5.5.0 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in requeue_rx_msgs run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink # git bisect bad 33b3d2e88c9efd701b6153ca4714d4aa6e9f5af0 Bisecting: 1122 revisions left to test after this (roughly 10 steps) [9531ab65f4ec066a6e6617a08a293c60397a161b] Merge branch 'kcm' testing commit 9531ab65f4ec066a6e6617a08a293c60397a161b with gcc (GCC) 5.5.0 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in skb_unlink # git bisect bad 9531ab65f4ec066a6e6617a08a293c60397a161b Bisecting: 560 revisions left to test after this (roughly 9 steps) [d289cbed9d55a94e44c0ff2c9803e1d68e4b57fe] Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue testing commit d289cbed9d55a94e44c0ff2c9803e1d68e4b57fe with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: 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-executor445710433" "root@10.128.0.184:./syz-executor445710433"]: exit status 1 ssh: connect to host 10.128.0.184 port 22: Connection timed out lost connection 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-executor910086220" "root@10.128.0.186:./syz-executor910086220"]: exit status 1 ssh: connect to host 10.128.0.186 port 22: Connection timed out lost connection run #3: 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-executor918180667" "root@10.128.0.203:./syz-executor918180667"]: exit status 1 ssh: connect to host 10.128.0.203 port 22: Connection timed out lost connection run #4: 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-executor641131870" "root@10.128.0.207:./syz-executor641131870"]: exit status 1 ssh: connect to host 10.128.0.207 port 22: Connection timed out lost connection run #5: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad d289cbed9d55a94e44c0ff2c9803e1d68e4b57fe Bisecting: 280 revisions left to test after this (roughly 8 steps) [4952cd3e7b47dfe8f7d6c69973b13eb487eb2bd0] tipc: refactor node xmit and fix memory leaks testing commit 4952cd3e7b47dfe8f7d6c69973b13eb487eb2bd0 with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock run #2: crashed: possible deadlock in nf_conntrack_lock run #3: crashed: possible deadlock in nf_conntrack_lock run #4: crashed: possible deadlock in nf_conntrack_lock run #5: 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-executor072529472" "root@10.128.10.45:./syz-executor072529472"]: exit status 1 ssh: connect to host 10.128.10.45 port 22: Connection timed out lost connection run #6: 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-executor897561759" "root@10.128.10.58:./syz-executor897561759"]: exit status 1 ssh: connect to host 10.128.10.58 port 22: Connection timed out lost connection run #7: 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-executor036955506" "root@10.128.10.32:./syz-executor036955506"]: exit status 1 ssh: connect to host 10.128.10.32 port 22: Connection timed out lost connection run #8: 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-executor229949481" "root@10.128.10.38:./syz-executor229949481"]: exit status 1 ssh: connect to host 10.128.10.38 port 22: Connection timed out lost connection run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad 4952cd3e7b47dfe8f7d6c69973b13eb487eb2bd0 Bisecting: 140 revisions left to test after this (roughly 7 steps) [06e56ded867d1035b877aba28189736f41e85ab0] batman-adv: Convert batadv_bla_backbone_gw to kref testing commit 06e56ded867d1035b877aba28189736f41e85ab0 with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock run #2: crashed: possible deadlock in nf_conntrack_lock run #3: 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-executor712055363" "root@10.128.1.60:./syz-executor712055363"]: exit status 1 ssh: connect to host 10.128.1.60 port 22: Connection timed out lost connection run #4: 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-executor086964934" "root@10.128.1.47:./syz-executor086964934"]: exit status 1 ssh: connect to host 10.128.1.47 port 22: Connection timed out lost connection run #5: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad 06e56ded867d1035b877aba28189736f41e85ab0 Bisecting: 69 revisions left to test after this (roughly 6 steps) [2e365b1b80aa98655a5582dbb9bf6cf8c0ff268c] be2net: Don't run ethtool self-tests for VFs testing commit 2e365b1b80aa98655a5582dbb9bf6cf8c0ff268c with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock run #2: crashed: possible deadlock in nf_conntrack_lock run #3: 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-executor985849320" "root@10.128.1.52:./syz-executor985849320"]: exit status 1 ssh: connect to host 10.128.1.52 port 22: Connection timed out lost connection run #4: 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-executor288429095" "root@10.128.0.16:./syz-executor288429095"]: exit status 1 ssh: connect to host 10.128.0.16 port 22: Connection timed out lost connection run #5: 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-executor087978842" "root@10.128.1.51:./syz-executor087978842"]: exit status 1 ssh: connect to host 10.128.1.51 port 22: Connection timed out lost connection run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad 2e365b1b80aa98655a5582dbb9bf6cf8c0ff268c Bisecting: 34 revisions left to test after this (roughly 5 steps) [9d691539eea2d977e3eb86766c389a19a9c13146] tcp: do not enqueue skb with SYN flag testing commit 9d691539eea2d977e3eb86766c389a19a9c13146 with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: 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-executor560790940" "root@10.128.1.19:./syz-executor560790940"]: exit status 1 ssh: connect to host 10.128.1.19 port 22: Connection timed out lost connection 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-executor749598795" "root@10.128.10.56:./syz-executor749598795"]: exit status 1 ssh: connect to host 10.128.10.56 port 22: Connection timed out lost connection run #3: 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-executor128458542" "root@10.128.0.21:./syz-executor128458542"]: exit status 1 ssh: connect to host 10.128.0.21 port 22: Connection timed out lost connection run #4: 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-executor190696629" "root@10.128.10.43:./syz-executor190696629"]: exit status 1 ssh: connect to host 10.128.10.43 port 22: Connection timed out lost connection run #5: 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-executor136313488" "root@10.128.0.209:./syz-executor136313488"]: exit status 1 ssh: connect to host 10.128.0.209 port 22: Connection timed out lost connection run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad 9d691539eea2d977e3eb86766c389a19a9c13146 Bisecting: 17 revisions left to test after this (roughly 4 steps) [f6d83d1376f496e6218080dd6eb663830672813f] i40evf: add new write-back mode testing commit f6d83d1376f496e6218080dd6eb663830672813f with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock run #2: crashed: possible deadlock in nf_conntrack_lock run #3: 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-executor791147586" "root@10.128.1.35:./syz-executor791147586"]: exit status 1 ssh: connect to host 10.128.1.35 port 22: Connection timed out lost connection run #4: 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-executor940431545" "root@10.128.1.50:./syz-executor940431545"]: exit status 1 ssh: connect to host 10.128.1.50 port 22: Connection timed out lost connection run #5: 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-executor654875332" "root@10.128.1.53:./syz-executor654875332"]: exit status 1 ssh: connect to host 10.128.1.53 port 22: Connection timed out lost connection run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad f6d83d1376f496e6218080dd6eb663830672813f Bisecting: 8 revisions left to test after this (roughly 3 steps) [209dc4daf23f92b3e0bc6d602411506c4083e421] i40evf: allow channel bonding of VFs testing commit 209dc4daf23f92b3e0bc6d602411506c4083e421 with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock 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-executor993729174" "root@10.128.0.149:./syz-executor993729174"]: exit status 1 ssh: connect to host 10.128.0.149 port 22: Connection timed out lost connection run #3: 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-executor880820989" "root@10.128.0.229:./syz-executor880820989"]: exit status 1 ssh: connect to host 10.128.0.229 port 22: Connection timed out lost connection run #4: 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-executor728621624" "root@10.128.15.196:./syz-executor728621624"]: exit status 1 ssh: connect to host 10.128.15.196 port 22: Connection timed out lost connection run #5: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad 209dc4daf23f92b3e0bc6d602411506c4083e421 Bisecting: 3 revisions left to test after this (roughly 2 steps) [b45efa30a626e915192a6c548cd8642379cd47cc] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net testing commit b45efa30a626e915192a6c548cd8642379cd47cc with gcc (GCC) 5.5.0 run #0: crashed: possible deadlock in nf_conntrack_lock run #1: crashed: possible deadlock in nf_conntrack_lock 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-executor506329642" "root@10.128.0.212:./syz-executor506329642"]: exit status 1 ssh: connect to host 10.128.0.212 port 22: Connection timed out lost connection run #3: 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-executor223727489" "root@10.128.0.14:./syz-executor223727489"]: exit status 1 ssh: connect to host 10.128.0.14 port 22: Connection timed out lost connection run #4: 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-executor952198892" "root@10.128.0.13:./syz-executor952198892"]: exit status 1 ssh: connect to host 10.128.0.13 port 22: Connection timed out lost connection run #5: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #6: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #7: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #8: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock run #9: crashed: BUG: spinlock lockup suspected in nf_conntrack_lock # git bisect bad b45efa30a626e915192a6c548cd8642379cd47cc Bisecting: 1 revision left to test after this (roughly 1 step) [725da8dee445662beea77d3f42c3f4c79f7a7a0e] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net testing commit 725da8dee445662beea77d3f42c3f4c79f7a7a0e with gcc (GCC) 5.5.0 all runs: OK # git bisect good 725da8dee445662beea77d3f42c3f4c79f7a7a0e Bisecting: 0 revisions left to test after this (roughly 0 steps) [7a26019fdecdb45ff784ae4e3b7e0cc9045100ca] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net testing commit 7a26019fdecdb45ff784ae4e3b7e0cc9045100ca with gcc (GCC) 5.5.0 all runs: OK # git bisect good 7a26019fdecdb45ff784ae4e3b7e0cc9045100ca b45efa30a626e915192a6c548cd8642379cd47cc is the first bad commit revisions tested: 27, total time: 3h51m44.345268187s (build: 1h23m50.502488892s, test: 2h21m20.891442023s) first bad commit: b45efa30a626e915192a6c548cd8642379cd47cc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net cc: ["davem@davemloft.net"] crash: BUG: spinlock lockup suspected in nf_conntrack_lock [] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 BUG: spinlock lockup suspected on CPU#1, kworker/u4:0/6 lock: nf_conntrack_locks+0x0/0xe000, .magic: dead4ead, .owner: kworker/u4:0/6, .owner_cpu: 1 CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net ffffffff82e0a780 ffff8802169a7c10 ffffffff8180b169 ffff8802169a2180 ffff8802169a7c30 ffffffff811bfed3 ffffffff82e0a780 0000000089173700 ffff8802169a7c60 ffffffff811bfffb ffffffff82e0a780 ffff8802157d5570 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x4b/0x72 lib/dump_stack.c:50 [] spin_dump+0x73/0xc0 kernel/locking/spinlock_debug.c:67 [] __spin_lock_debug kernel/locking/spinlock_debug.c:117 [inline] [] do_raw_spin_lock+0x9b/0x160 kernel/locking/spinlock_debug.c:137 [] __raw_spin_lock include/linux/spinlock_api_smp.h:145 [inline] [] _raw_spin_lock+0x3b/0x50 kernel/locking/spinlock.c:151 [] spin_lock include/linux/spinlock.h:302 [inline] [] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:74 [] ctnl_untimeout.isra.4+0xdc/0x110 net/netfilter/nfnetlink_cttimeout.c:315 [] cttimeout_net_exit+0x28/0x80 net/netfilter/nfnetlink_cttimeout.c:581 [] ops_exit_list.isra.4+0x33/0x60 net/core/net_namespace.c:134 [] cleanup_net+0x1a9/0x270 net/core/net_namespace.c:431 [] process_one_work+0x215/0x650 kernel/workqueue.c:2036 [] worker_thread+0x49/0x490 kernel/workqueue.c:2170 [] kthread+0xf9/0x110 kernel/kthread.c:209 [] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffffffff82e21540 ti: ffffffff82e00000 task.ti: ffffffff82e00000 RIP: 0010:[] [] native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:50 RSP: 0018:ffffffff82e03eb8 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffffff82e00000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff810876d9 RBP: ffffffff82e03eb8 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82e00000 FS: 0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000481420 CR3: 00000000b9c88000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff82e03ed8 ffffffff810876e8 ffffffff82e00000 ffffffff82e04000 ffffffff82e03ee8 ffffffff8108803a ffffffff82e03ef8 ffffffff811b3bd5 ffffffff82e03f40 ffffffff811b3fb7 ffffffff82e04000 9b64ffb15f2c34b6 Call Trace: [] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline] [] default_idle+0x28/0x160 arch/x86/kernel/process.c:304 [] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:295 [] default_idle_call+0x25/0x50 kernel/sched/idle.c:92 [] cpuidle_idle_call kernel/sched/idle.c:150 [inline] [] cpu_idle_loop kernel/sched/idle.c:246 [inline] [] cpu_startup_entry+0x3b7/0x440 kernel/sched/idle.c:294 [] rest_init+0x135/0x140 init/main.c:412 [] start_kernel+0x4a6/0x4b3 init/main.c:683 [] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:203 [] x86_64_start_kernel+0x145/0x152 arch/x86/kernel/head64.c:184 Code: 00 00 00 00 00 55 48 89 e5 fa 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 66 0f 1f 84 NMI backtrace for cpu 1 CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net task: ffff8802169a2180 ti: ffff8802169a4000 task.ti: ffff8802169a4000 RIP: 0010:[] [] native_write_msr_safe+0x6/0x40 arch/x86/include/asm/msr.h:132 RSP: 0018:ffff8802169a7b68 EFLAGS: 00000086 RAX: 0000000000000400 RBX: ffffffff8301c5a0 RCX: 0000000000000830 RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000830 RBP: ffff8802169a7b70 R08: 0000000000000400 R09: 0000000000000003 R10: ffff8802169a2a18 R11: 0000000000000001 R12: 0000000000080000 R13: 0000000000000001 R14: 0000000000000001 R15: 000000000000a130 FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056007cb90000 CR3: 0000000002e1a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff810bd7fa ffff8802169a7bb8 ffffffff810bd8af 0000000000000282 0000000200000010 0000000000011440 0000000000000001 ffffffff810ba4c0 0000000089173700 0000000000000001 ffff8802169a7bc8 ffffffff810bd97e Call Trace: [] __x2apic_send_IPI_mask+0xaf/0x120 arch/x86/kernel/apic/x2apic_phys.c:62 [] x2apic_send_IPI_mask+0xe/0x10 arch/x86/kernel/apic/x2apic_cluster.c:87 [] nmi_raise_cpu_backtrace+0x16/0x20 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace+0x243/0x250 lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:41 [inline] [] __spin_lock_debug kernel/locking/spinlock_debug.c:119 [inline] [] do_raw_spin_lock+0xa5/0x160 kernel/locking/spinlock_debug.c:137 [] __raw_spin_lock include/linux/spinlock_api_smp.h:145 [inline] [] _raw_spin_lock+0x3b/0x50 kernel/locking/spinlock.c:151 [] spin_lock include/linux/spinlock.h:302 [inline] [] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:74 [] ctnl_untimeout.isra.4+0xdc/0x110 net/netfilter/nfnetlink_cttimeout.c:315 [] cttimeout_net_exit+0x28/0x80 net/netfilter/nfnetlink_cttimeout.c:581 [] ops_exit_list.isra.4+0x33/0x60 net/core/net_namespace.c:134 [] cleanup_net+0x1a9/0x270 net/core/net_namespace.c:431 [] process_one_work+0x215/0x650 kernel/workqueue.c:2036 [] worker_thread+0x49/0x490 kernel/workqueue.c:2170 [] kthread+0xf9/0x110 kernel/kthread.c:209 [] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 Code: 5b 5d c3 48 c1 e2 20 48 89 d3 31 d2 48 09 c3 48 89 de e8 9e 07 78 00 48 89 d8 5b 5d c3 0f 1f 84 00 00 00 00 00 89 f0 89 f9 0f 30 <31> c0 0f 1f 44 00 00 c3 55 41 89 f0 48 89 d6 48 c1 e6 20 89 c2