bisecting cause commit starting from 2a987e65025e2b79c6d453b78cb5985ac6e5eb26 building syzkaller on a4a2a50158b25d4af0fd07528f38e6656b903d68 testing commit 2a987e65025e2b79c6d453b78cb5985ac6e5eb26 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: a4b0a8997559174ef9cfbc3ab7452975a4540d29305304ed5605cd36028984fd run #0: 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" "/tmp/syz-executor370914051" "root@10.128.15.220:./syz-executor370914051"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.220 port 22 timed out lost connection 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" "/tmp/syz-executor902790938" "root@10.128.15.225:./syz-executor902790938"]: exit status 1 ssh: connect to host 10.128.15.225 port 22: Connection timed out lost connection run #2: OK run #3: crashed: INFO: rcu detected stall in corrupted run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: crashed: WARNING in insert_work run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK reproducer seems to be flaky testing release v5.15 testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f022453079e48b0d1b235afa1df77c4f350bb0819401752f5af42ca0fa10a066 run #0: 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" "/tmp/syz-executor628542466" "root@10.128.15.200:./syz-executor628542466"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.200 port 22 timed out lost connection 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" "/tmp/syz-executor189266564" "root@10.128.15.203:./syz-executor189266564"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.203 port 22 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" "/tmp/syz-executor464218643" "root@10.128.15.206:./syz-executor464218643"]: exit status 1 ssh: connect to host 10.128.15.206 port 22: Connection timed out lost connection run #3: OK 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" "/tmp/syz-executor843728062" "root@10.128.15.211:./syz-executor843728062"]: exit status 1 ssh: connect to host 10.128.15.211 port 22: Connection timed out lost connection run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect start 2a987e65025e2b79c6d453b78cb5985ac6e5eb26 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 7052 revisions left to test after this (roughly 13 steps) [ff0700f03609b9f0defacd4ce96d9519d721e0a2] Merge tag 'sound-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit ff0700f03609b9f0defacd4ce96d9519d721e0a2 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 03e30864857a100b480cbd06b59ff8bb683c6a44087a564d3a46f542711fd4d6 all runs: OK # git bisect good ff0700f03609b9f0defacd4ce96d9519d721e0a2 Bisecting: 3548 revisions left to test after this (roughly 12 steps) [6b491a86b77c0dc323ca49f3a29a0f67178b75f8] perf build: Install libbpf headers locally when building testing commit 6b491a86b77c0dc323ca49f3a29a0f67178b75f8 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 89d1c0cef67444f98ef9ccc844abf558452d325e33d3e67401f7e9e36e64e0f0 run #0: 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" "/tmp/syz-executor954399326" "root@10.128.0.228:./syz-executor954399326"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.0.228 port 22 timed out lost connection 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" "/tmp/syz-executor883070501" "root@10.128.1.33:./syz-executor883070501"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.1.33 port 22 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" "/tmp/syz-executor046794051" "root@10.128.1.61:./syz-executor046794051"]: exit status 1 ssh: connect to host 10.128.1.61 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" "/tmp/syz-executor191573594" "root@10.128.15.201:./syz-executor191573594"]: exit status 1 ssh: connect to host 10.128.15.201 port 22: Connection timed out lost connection run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 6b491a86b77c0dc323ca49f3a29a0f67178b75f8 Bisecting: 1750 revisions left to test after this (roughly 11 steps) [f78e9de80f5ad15719a069a4e6c11e2777122188] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input testing commit f78e9de80f5ad15719a069a4e6c11e2777122188 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2d56da37c1d915e5caf407e82d725aaaa3620053310b4920db741939e5da280a run #0: 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" "/tmp/syz-executor794512825" "root@10.128.10.52:./syz-executor794512825"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.10.52 port 22 timed out lost connection 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" "/tmp/syz-executor621270328" "root@10.128.10.36:./syz-executor621270328"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.10.36 port 22 timed out lost connection run #2: crashed: INFO: rcu detected stall in ext4_file_write_iter run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect bad f78e9de80f5ad15719a069a4e6c11e2777122188 Bisecting: 920 revisions left to test after this (roughly 10 steps) [d2f38a3c6507b2520101f9a3807ed98f1bdc545a] Merge tag 'backlight-next-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight testing commit d2f38a3c6507b2520101f9a3807ed98f1bdc545a compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d071e7f1984da8381880a05cf8d64d1c32ae503575390acf93160b1039fa4460 run #0: 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" "/tmp/syz-executor926257549" "root@10.128.1.57:./syz-executor926257549"]: exit status 1 ssh: connect to host 10.128.1.57 port 22: Connection timed out lost connection 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" "/tmp/syz-executor180277575" "root@10.128.15.194:./syz-executor180277575"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.194 port 22 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" "/tmp/syz-executor965422030" "root@10.128.15.203:./syz-executor965422030"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.203 port 22 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" "/tmp/syz-executor593711664" "root@10.128.15.206:./syz-executor593711664"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.206 port 22 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" "/tmp/syz-executor383887074" "root@10.128.15.208:./syz-executor383887074"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.208 port 22 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" "/tmp/syz-executor628794328" "root@10.128.15.217:./syz-executor628794328"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.217 port 22 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" "/tmp/syz-executor225923415" "root@10.128.15.218:./syz-executor225923415"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.218 port 22 timed out lost connection run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good d2f38a3c6507b2520101f9a3807ed98f1bdc545a Bisecting: 460 revisions left to test after this (roughly 9 steps) [881007522c8fcc3785c75432dbb149ca1b78e106] Merge tag 'thermal-5.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm testing commit 881007522c8fcc3785c75432dbb149ca1b78e106 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d920c8329a1cd8c7b4affd2a9cb1e4325789f7fae9c9c40d07dd5d035a6b0e4a run #0: 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" "/tmp/syz-executor396131468" "root@10.128.0.242:./syz-executor396131468"]: exit status 1 ssh: connect to host 10.128.0.242 port 22: Connection timed out lost connection 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" "/tmp/syz-executor610961019" "root@10.128.10.56:./syz-executor610961019"]: exit status 1 ssh: connect to host 10.128.10.56 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" "/tmp/syz-executor797342618" "root@10.128.15.213:./syz-executor797342618"]: exit status 1 ssh: connect to host 10.128.15.213 port 22: Connection timed out lost connection run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 881007522c8fcc3785c75432dbb149ca1b78e106 Bisecting: 291 revisions left to test after this (roughly 8 steps) [b873e986816a0b8408c177b2c52a6915cca8713c] kasan: add kasan mode messages when kasan init testing commit b873e986816a0b8408c177b2c52a6915cca8713c compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: eb1b048cba49d98c77ccf14ae3efebae45b11344435d90b48d168193e6e3a8f9 all runs: OK # git bisect good b873e986816a0b8408c177b2c52a6915cca8713c Bisecting: 144 revisions left to test after this (roughly 7 steps) [6d76f6eb46cbf8334b37352f2c2908329d028286] Merge tag 'm68knommu-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu testing commit 6d76f6eb46cbf8334b37352f2c2908329d028286 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2b572dc71c39b575e413a4d136ecc5a0cdb8b1a5fe95bc121c647924ca266354 run #0: 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" "/tmp/syz-executor805549936" "root@10.128.0.53:./syz-executor805549936"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.0.53 port 22 timed out lost connection 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" "/tmp/syz-executor038904950" "root@10.128.10.7:./syz-executor038904950"]: exit status 1 ssh: connect to host 10.128.10.7 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" "/tmp/syz-executor053881181" "root@10.128.15.242:./syz-executor053881181"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.242 port 22 timed out lost connection run #3: OK run #4: crashed: INFO: rcu detected stall in ext4_file_write_iter run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect bad 6d76f6eb46cbf8334b37352f2c2908329d028286 Bisecting: 72 revisions left to test after this (roughly 6 steps) [9bea6aa4980f1b1afa69d4f83cdaa449d47c0fc4] Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf testing commit 9bea6aa4980f1b1afa69d4f83cdaa449d47c0fc4 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: bb59230f6a397d802686eebe757a9e70af7c201ad8850811cfc6735c0283f603 run #0: 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" "/tmp/syz-executor234506188" "root@10.128.0.138:./syz-executor234506188"]: exit status 1 ssh: connect to host 10.128.0.138 port 22: Connection timed out lost connection 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" "/tmp/syz-executor972772383" "root@10.128.0.231:./syz-executor972772383"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.0.231 port 22 timed out lost connection run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 9bea6aa4980f1b1afa69d4f83cdaa449d47c0fc4 Bisecting: 36 revisions left to test after this (roughly 5 steps) [8f1bc38bbb516826ede8c96cb73a884221f1a314] net: mana: Fix spelling mistake "calledd" -> "called" testing commit 8f1bc38bbb516826ede8c96cb73a884221f1a314 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f4217102b69f114c79526340d4d29d78653099e2edafb0681436bb08751f4edf run #0: 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" "/tmp/syz-executor849142200" "root@10.128.15.203:./syz-executor849142200"]: exit status 1 ssh: connect to host 10.128.15.203 port 22: Connection timed out lost connection 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" "/tmp/syz-executor604415402" "root@10.128.15.207:./syz-executor604415402"]: exit status 1 ssh: connect to host 10.128.15.207 port 22: Connection timed out lost connection run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 8f1bc38bbb516826ede8c96cb73a884221f1a314 Bisecting: 18 revisions left to test after this (roughly 4 steps) [c7ebe23cee350fb187ee00ff445b01e11de0bfe9] net/mlx5: Lag, fix a potential Oops with mlx5_lag_create_definer() testing commit c7ebe23cee350fb187ee00ff445b01e11de0bfe9 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7ab1c0bdc4626207e0de8231145caa4833237c179ebea2461b401046c4c8d093 run #0: 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" "/tmp/syz-executor264904021" "root@10.128.0.4:./syz-executor264904021"]: exit status 1 ssh: connect to host 10.128.0.4 port 22: Connection timed out lost connection run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good c7ebe23cee350fb187ee00ff445b01e11de0bfe9 Bisecting: 11 revisions left to test after this (roughly 3 steps) [c55a04176cba5a2de085461438b65e1c46541ef3] Merge tag 'char-misc-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc testing commit c55a04176cba5a2de085461438b65e1c46541ef3 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6e0f4fdb5f34077a7f0d7be2c1393bd8da79f12258535a7845c405ae582e1fb1 run #0: OK 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" "/tmp/syz-executor458202676" "root@10.128.0.115:./syz-executor458202676"]: exit status 1 ssh: connect to host 10.128.0.115 port 22: Connection timed out lost connection run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good c55a04176cba5a2de085461438b65e1c46541ef3 Bisecting: 5 revisions left to test after this (roughly 3 steps) [f54ca91fe6f25c2028f953ce82f19ca2ea0f07bb] Merge tag 'net-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net testing commit f54ca91fe6f25c2028f953ce82f19ca2ea0f07bb compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 0d1e3568f72b0edf2cc964c4266f69888ef288d65f09fdc6863fab4aea2132a7 run #0: 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" "/tmp/syz-executor236436304" "root@10.128.10.49:./syz-executor236436304"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.10.49 port 22 timed out lost connection 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" "/tmp/syz-executor752587887" "root@10.128.10.50:./syz-executor752587887"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.10.50 port 22 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" "/tmp/syz-executor756128377" "root@10.128.15.192:./syz-executor756128377"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.192 port 22 timed out lost connection run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good f54ca91fe6f25c2028f953ce82f19ca2ea0f07bb Bisecting: 2 revisions left to test after this (roughly 2 steps) [600b18f88f2625ba48542dfeaa5fe8b23b3fd2c4] Merge tag 'trace-v5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace testing commit 600b18f88f2625ba48542dfeaa5fe8b23b3fd2c4 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2b572dc71c39b575e413a4d136ecc5a0cdb8b1a5fe95bc121c647924ca266354 run #0: 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" "/tmp/syz-executor003364680" "root@10.128.10.60:./syz-executor003364680"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.10.60 port 22 timed out lost connection 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" "/tmp/syz-executor721855222" "root@10.128.15.212:./syz-executor721855222"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.15.212 port 22 timed out lost connection run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 600b18f88f2625ba48542dfeaa5fe8b23b3fd2c4 Bisecting: 0 revisions left to test after this (roughly 1 step) [6dbe88e93c351a6cf5b7c70850d7a1a7f67d83ab] m68knommu: Remove MCPU32 config symbol testing commit 6dbe88e93c351a6cf5b7c70850d7a1a7f67d83ab compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ac8b89f2d910129be68ba7a9c03a3fc0e4fab8d2dcdb7eb2e70f4c168af7ffb9 run #0: 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" "/tmp/syz-executor423540594" "root@10.128.10.63:./syz-executor423540594"]: exit status 1 ssh: connect to host 10.128.10.63 port 22: Connection timed out lost connection 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" "/tmp/syz-executor774041460" "root@10.128.0.159:./syz-executor774041460"]: exit status 1 ssh: connect to host 10.128.0.159 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" "/tmp/syz-executor399371462" "root@10.128.0.20:./syz-executor399371462"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.0.20 port 22 timed out lost connection run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK # git bisect good 6dbe88e93c351a6cf5b7c70850d7a1a7f67d83ab 6d76f6eb46cbf8334b37352f2c2908329d028286 is the first bad commit commit 6d76f6eb46cbf8334b37352f2c2908329d028286 Merge: 600b18f88f26 6dbe88e93c35 Author: Linus Torvalds Date: Thu Nov 11 14:22:05 2021 -0800 Merge tag 'm68knommu-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu updates from Greg Ungerer: "Only two changes. One removes the now unused CONFIG_MCPU32 symbol. The other sets a default for the CONFIG_MEMORY_RESERVE config symbol (this aids scripting and other automation) so you don't interactively get asked for a value at configure time. Summary: - remove unused CONFIG_MCPU32 symbol - default CONFIG_MEMORY_RESERVE value (for scripting)" * tag 'm68knommu-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: Remove MCPU32 config symbol m68k: set a default value for MEMORY_RESERVE arch/m68k/Kconfig.cpu | 11 ----------- arch/m68k/Kconfig.machine | 1 + arch/m68k/include/asm/bitops.h | 2 +- 3 files changed, 2 insertions(+), 12 deletions(-) Reproducer flagged being flaky revisions tested: 16, total time: 4h56m58.723255764s (build: 1h43m1.305200929s, test: 3h12m11.149374843s) first bad commit: 6d76f6eb46cbf8334b37352f2c2908329d028286 Merge tag 'm68knommu-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu recipients (to): ["torvalds@linux-foundation.org"] recipients (cc): [] crash: INFO: rcu detected stall in ext4_file_write_iter rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (1 GPs behind) idle=581/1/0x4000000000000000 softirq=16829/16834 fqs=1 (t=10500 jiffies g=18565 q=172) rcu: rcu_preempt kthread starved for 8454 jiffies! g18565 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:28760 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa5a/0x48f0 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 schedule_timeout+0x11d/0x250 kernel/time/timer.c:1881 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128 kthread+0x3ab/0x480 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9112 Comm: kworker/u4:7 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0x22e/0x9d0 kernel/smp.c:969 Code: 38 d0 7c 08 84 d2 0f 85 2b 05 00 00 8b 43 08 a8 01 74 2e 48 89 ca 49 89 cf 48 c1 ea 03 41 83 e7 07 4c 01 e2 41 83 c7 03 f3 90 <0f> b6 02 41 38 c7 7c 08 84 c0 0f 85 d4 04 00 00 8b 43 08 a8 01 75 RSP: 0018:ffffc9000d00fa60 EFLAGS: 00000202 RAX: 0000000000000011 RBX: ffff8880b9f3fc00 RCX: ffff8880b9f3fc08 RDX: ffffed10173e7f81 RSI: ffff8880b9e3ab08 RDI: ffffffff8a5f08a8 RBP: ffff8880b9e3ab00 R08: 0000000000000001 R09: ffffffff8edd1a07 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880b9e3ab08 R14: ffffed10173c7560 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c9c03e148 CR3: 000000000a88e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3f/0x70 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1112 [inline] text_poke_bp_batch+0x1b5/0x540 arch/x86/kernel/alternative.c:1297 text_poke_flush arch/x86/kernel/alternative.c:1451 [inline] text_poke_flush arch/x86/kernel/alternative.c:1448 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x15f/0x220 kernel/jump_label.c:177 static_key_enable+0x11/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:732 [inline] toggle_allocation_gate+0xe3/0x310 mm/kfence/core.c:724 process_one_work+0x85b/0x1430 kernel/workqueue.c:2298 worker_thread+0x598/0x1040 kernel/workqueue.c:2445 kthread+0x3ab/0x480 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 NMI backtrace for cpu 1 CPU: 1 PID: 9841 Comm: syz-executor175 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x18a/0x1c0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3878 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597 update_process_times+0x13b/0x1c0 kernel/time/timer.c:1785 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x18a/0xb00 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x2f5/0x780 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 be ab e4 f8 48 89 ef e8 06 22 e5 f8 e8 51 8f 01 f9 fb bf 01 00 00 00 86 ff d7 f8 65 8b 05 af c7 92 77 85 c0 74 02 5d c3 0f 1f 44 00 RSP: 0018:ffffc90001b2f0a0 EFLAGS: 00000202 RAX: 00000000008c3823 RBX: ffff88806a9eaca8 RCX: 1ffffffff1dc174e RDX: 0000000000000000 RSI: ffffffff88cb4d00 RDI: 0000000000000001 RBP: ffff88806a9eacb0 R08: 0000000000000001 R09: ffffffff8edd1a9f R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90001b2f120 R13: 0000000000000000 R14: fffff94000b40778 R15: dffffc0000000000 spin_unlock_irq include/linux/spinlock.h:399 [inline] __filemap_add_folio+0x479/0xa70 mm/filemap.c:952 filemap_add_folio+0xa7/0x170 mm/filemap.c:999 __filemap_get_folio+0x274/0x940 mm/filemap.c:1962 pagecache_get_page+0x10/0x100 mm/folio-compat.c:125 ext4_write_begin+0x228/0xff0 fs/ext4/inode.c:1174 ext4_da_write_begin+0x468/0x840 fs/ext4/inode.c:2941 generic_perform_write+0x1c7/0x440 mm/filemap.c:3756 ext4_buffered_write_iter+0x171/0x330 fs/ext4/file.c:269 ext4_file_write_iter+0x383/0x1160 fs/ext4/file.c:681 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x336/0x6d0 fs/read_write.c:725 do_iter_write+0x12a/0x620 fs/read_write.c:851 iter_file_splice_write+0x598/0xaf0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xfb/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x2dd/0x7c0 fs/splice.c:891 do_splice_direct+0x154/0x260 fs/splice.c:979 do_sendfile+0x91e/0x1110 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x186/0x1d0 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5d58822149 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdd2cb44f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f5d58822149 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 00008400fffffffb R11: 0000000000000246 R12: 00007f5d587e5920 R13: 0000000000000000 R14: 00007ffdd2cb4520 R15: 00007ffdd2cb4510 ---------------- Code disassembly (best guess): 0: 38 d0 cmp %dl,%al 2: 7c 08 jl 0xc 4: 84 d2 test %dl,%dl 6: 0f 85 2b 05 00 00 jne 0x537 c: 8b 43 08 mov 0x8(%rbx),%eax f: a8 01 test $0x1,%al 11: 74 2e je 0x41 13: 48 89 ca mov %rcx,%rdx 16: 49 89 cf mov %rcx,%r15 19: 48 c1 ea 03 shr $0x3,%rdx 1d: 41 83 e7 07 and $0x7,%r15d 21: 4c 01 e2 add %r12,%rdx 24: 41 83 c7 03 add $0x3,%r15d 28: f3 90 pause * 2a: 0f b6 02 movzbl (%rdx),%eax <-- trapping instruction 2d: 41 38 c7 cmp %al,%r15b 30: 7c 08 jl 0x3a 32: 84 c0 test %al,%al 34: 0f 85 d4 04 00 00 jne 0x50e 3a: 8b 43 08 mov 0x8(%rbx),%eax 3d: a8 01 test $0x1,%al 3f: 75 .byte 0x75