bisecting cause commit starting from 4703d9119972bf586d2cca76ec6438f819ffa30e building syzkaller on 2e95ab335759ed7e1c246c2057c84d813a2c29e1 testing commit 4703d9119972bf586d2cca76ec6438f819ffa30e with gcc (GCC) 8.1.0 kernel signature: 7a969b232c982c77279cecc6d40a67e93b6a9fe60bbed774004c98b8f965bc51 run #0: crashed: INFO: rcu detected stall in ip_set_uadd run #1: crashed: INFO: rcu detected stall in ip_set_uadd run #2: crashed: INFO: rcu detected stall in ip_set_uadd run #3: crashed: INFO: rcu detected stall in ip_set_uadd run #4: crashed: INFO: rcu detected stall in ip_set_uadd run #5: crashed: INFO: rcu detected stall in ip_set_uadd run #6: crashed: INFO: rcu detected stall in ip_set_uadd run #7: crashed: INFO: rcu detected stall in hash_ip4_gc run #8: crashed: INFO: rcu detected stall in ip_set_uadd run #9: crashed: INFO: rcu detected stall in ip_set_uadd testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0 kernel signature: 5d63cef5afa01b7757720d334adcce084c345310dc395b0dfbfb3507c69fef48 all runs: crashed: INFO: rcu detected stall in ip_set_uadd testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 kernel signature: ef6766275ffa84fdf1633ea59db8925e7e6d0a31b57d032ef9eaa74bf26f4849 run #0: crashed: INFO: rcu detected stall in ip_set_uadd run #1: crashed: INFO: rcu detected stall in ip_set_uadd run #2: crashed: INFO: rcu detected stall in ip_set_uadd run #3: crashed: INFO: rcu detected stall in ip_set_uadd run #4: crashed: INFO: task hung in synchronize_rcu run #5: crashed: INFO: rcu detected stall in ip_set_uadd run #6: crashed: INFO: task hung in synchronize_rcu run #7: crashed: no output from test machine 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-executor880916810" "root@10.128.0.169:./syz-executor880916810"]: exit status 1 ssh: connect to host 10.128.0.169 port 22: Connection timed out lost connection run #9: OK testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 kernel signature: 77e2b3a9e63b189c24f74348fa9ac8d0de5734a8fbece50e38ccdba3f781cca3 run #0: crashed: INFO: task hung in nfnetlink_rcv_msg run #1: crashed: INFO: rcu detected stall in ip_set_uadd run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in nfnetlink_rcv_msg run #4: crashed: INFO: task hung in corrupted run #5: crashed: INFO: task hung in nfnetlink_rcv_msg run #6: crashed: INFO: task hung in nfnetlink_rcv_msg run #7: crashed: INFO: rcu detected stall in hash_ip4_gc run #8: OK run #9: OK testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 kernel signature: 76c6181e63e5424d0dd77b828b072233dec051dade9a49f42bff613b8c276b6a run #0: crashed: INFO: rcu detected stall in ip_set_uadd run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: INFO: task hung in nfnetlink_rcv_msg run #4: crashed: INFO: task hung in synchronize_rcu run #5: crashed: INFO: task hung in corrupted run #6: crashed: INFO: task hung in corrupted run #7: crashed: INFO: task hung in corrupted 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-executor966731520" "root@10.128.10.43:./syz-executor966731520"]: exit status 1 Connection timed out during banner exchange lost connection 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-executor479580767" "root@10.128.0.148:./syz-executor479580767"]: exit status 1 ssh: connect to host 10.128.0.148 port 22: Connection timed out lost connection testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 kernel signature: f4f0d5ece951656fb6471e4b21c52fe73abc65e43af868773ebafe93d0d9b90b run #0: crashed: INFO: rcu detected stall in ip_set_uadd run #1: crashed: INFO: rcu detected stall in ip_set_uadd run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in nfnetlink_rcv_msg run #4: crashed: INFO: task hung in nfnetlink_rcv_msg run #5: crashed: INFO: task hung in synchronize_rcu run #6: crashed: INFO: rcu detected stall in ip_set_uadd run #7: crashed: INFO: task hung in ip_set_net_exit 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-executor149961705" "root@10.128.0.130:./syz-executor149961705"]: exit status 1 ssh: connect to host 10.128.0.130 port 22: Connection timed out lost connection 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-executor111610420" "root@10.128.10.43:./syz-executor111610420"]: exit status 1 ssh: connect to host 10.128.10.43 port 22: Connection timed out lost connection testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 kernel signature: 19b389877c352901c9956fb5d79a70c8718db712b1324e5ca3d6c1c018a737c1 all runs: OK # git bisect start 1c163f4c7b3f621efff9b28a47abb36f7378d783 8fe28cb58bcb235034b64cbbb7550a8a43fd88be Bisecting: 7011 revisions left to test after this (roughly 13 steps) [af7ddd8a627c62a835524b3f5b471edbbbcce025] Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping testing commit af7ddd8a627c62a835524b3f5b471edbbbcce025 with gcc (GCC) 8.1.0 kernel signature: 764b346e6cdc3c3714c6c02a098e3ebfc2cc87b3f11cf125fe8861e1775a0296 run #0: crashed: INFO: task hung in nfnetlink_rcv_msg run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in corrupted run #4: crashed: INFO: task hung in corrupted run #5: crashed: INFO: task hung in synchronize_rcu run #6: crashed: INFO: task hung in ip_set_net_exit run #7: crashed: INFO: rcu detected stall in hash_ip4_gc 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-executor827174511" "root@10.128.0.87:./syz-executor827174511"]: exit status 1 ssh: connect to host 10.128.0.87 port 22: Connection timed out lost connection 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-executor655379202" "root@10.128.0.13:./syz-executor655379202"]: exit status 1 ssh: connect to host 10.128.0.13 port 22: Connection timed out lost connection # git bisect bad af7ddd8a627c62a835524b3f5b471edbbbcce025 Bisecting: 3448 revisions left to test after this (roughly 12 steps) [792bf4d871dea8b69be2aaabdd320d7c6ed15985] Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 792bf4d871dea8b69be2aaabdd320d7c6ed15985 with gcc (GCC) 8.1.0 kernel signature: a5cdd6b446e211494ef24c1844ec27b9752f69fcea6deb1ec28a9845bec6b4f2 all runs: OK # git bisect good 792bf4d871dea8b69be2aaabdd320d7c6ed15985 Bisecting: 1729 revisions left to test after this (roughly 11 steps) [aa9d6e0f33aea8a1879e7e53fe0e436943f9ce0c] linux/netlink.h: drop unnecessary extern prefix testing commit aa9d6e0f33aea8a1879e7e53fe0e436943f9ce0c with gcc (GCC) 8.1.0 kernel signature: 81d82e1679331c1e808624c741d3491f7d578b86ada8af84382871d71e8c69aa all runs: OK # git bisect good aa9d6e0f33aea8a1879e7e53fe0e436943f9ce0c Bisecting: 835 revisions left to test after this (roughly 10 steps) [e0c38a4d1f196a4b17d2eba36afff8f656a4f1de] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next testing commit e0c38a4d1f196a4b17d2eba36afff8f656a4f1de with gcc (GCC) 8.1.0 kernel signature: a9c986f28498c6989cf1fa707d90c77edd80637643c66ff8eacfcf773d74df03 run #0: crashed: INFO: task hung in nfnetlink_rcv_msg run #1: crashed: INFO: task hung in synchronize_rcu run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: INFO: task hung in synchronize_rcu run #4: crashed: INFO: task hung in synchronize_rcu run #5: crashed: INFO: task hung in nfnetlink_rcv_msg run #6: crashed: INFO: task hung in nfnetlink_rcv_msg run #7: crashed: INFO: task hung in synchronize_rcu run #8: crashed: INFO: task hung in rtnl_lock 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-executor274580410" "root@10.128.10.38:./syz-executor274580410"]: exit status 1 Connection timed out during banner exchange lost connection # git bisect bad e0c38a4d1f196a4b17d2eba36afff8f656a4f1de Bisecting: 384 revisions left to test after this (roughly 9 steps) [8d6973327ee84c2f40dd9efd8928d4a1186c96e2] Merge tag 'powerpc-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 8d6973327ee84c2f40dd9efd8928d4a1186c96e2 with gcc (GCC) 8.1.0 kernel signature: 35ef7fd40acad9b397522bf47ef0a97f7b6e56f19529e61f24158034ba685932 all runs: OK # git bisect good 8d6973327ee84c2f40dd9efd8928d4a1186c96e2 Bisecting: 222 revisions left to test after this (roughly 8 steps) [e770454fabde2e0f8fb3e5039a2b6df8f128bc9b] Merge branch 'expand-txtimestamp-selftest' testing commit e770454fabde2e0f8fb3e5039a2b6df8f128bc9b with gcc (GCC) 8.1.0 kernel signature: 96058b687bf973f364fb803e2760d32534f710f1e22f3f3763d14b57b9be2dab all runs: OK # git bisect good e770454fabde2e0f8fb3e5039a2b6df8f128bc9b Bisecting: 106 revisions left to test after this (roughly 7 steps) [c3e533692527046fb55020e7fac8c4272644ba45] Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next testing commit c3e533692527046fb55020e7fac8c4272644ba45 with gcc (GCC) 8.1.0 kernel signature: 94abd9c80a91412bf5a7bc3945371bfe65830c074af73eae251bfb8e3b0fbab7 run #0: crashed: INFO: task hung in synchronize_rcu run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in rtnl_lock run #3: crashed: INFO: task hung in corrupted run #4: crashed: no output from test machine run #5: crashed: INFO: task hung in ip_set_net_exit 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-executor136022386" "root@10.128.0.182:./syz-executor136022386"]: exit status 1 ssh: connect to host 10.128.0.182 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-executor848986153" "root@10.128.15.192:./syz-executor848986153"]: exit status 1 ssh: connect to host 10.128.15.192 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-executor694260084" "root@10.128.15.199:./syz-executor694260084"]: exit status 1 ssh: connect to host 10.128.15.199 port 22: Connection timed out lost connection 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-executor789627971" "root@10.128.0.112:./syz-executor789627971"]: exit status 1 ssh: connect to host 10.128.0.112 port 22: Connection timed out lost connection # git bisect bad c3e533692527046fb55020e7fac8c4272644ba45 Bisecting: 57 revisions left to test after this (roughly 6 steps) [9df95e8ec568f98d89fe2c72342714296ac6ce27] bpf: sparc64: Enable sparc64 jit to provide bpf_line_info testing commit 9df95e8ec568f98d89fe2c72342714296ac6ce27 with gcc (GCC) 8.1.0 kernel signature: eb3fa2e8528cb9efc8f804faa892623d198e468894f4fb6a3903baa6c69a3e80 all runs: OK # git bisect good 9df95e8ec568f98d89fe2c72342714296ac6ce27 Bisecting: 28 revisions left to test after this (roughly 5 steps) [06aa151ad1fc74a49b45336672515774a678d78d] netfilter: ipt_CLUSTERIP: check MAC address when duplicate config is set testing commit 06aa151ad1fc74a49b45336672515774a678d78d with gcc (GCC) 8.1.0 kernel signature: f5c948aadd5bce6cc512b91bf673b0a9bada8738163567106b975f95e612a18b run #0: crashed: INFO: task hung in nfnetlink_rcv_msg run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: INFO: task hung in synchronize_rcu run #4: crashed: INFO: task hung in synchronize_rcu run #5: crashed: INFO: task hung in synchronize_rcu run #6: crashed: INFO: task hung in nfnetlink_rcv_msg 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-executor810429625" "root@10.128.10.63:./syz-executor810429625"]: exit status 1 ssh: connect to host 10.128.10.63 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-executor251294404" "root@10.128.0.131:./syz-executor251294404"]: exit status 1 ssh: connect to host 10.128.0.131 port 22: Connection timed out lost connection run #9: OK # git bisect bad 06aa151ad1fc74a49b45336672515774a678d78d Bisecting: 14 revisions left to test after this (roughly 4 steps) [a504b703bb1da526a01593da0e4be2af9d9f5fa8] netfilter: nat: limit port clash resolution attempts testing commit a504b703bb1da526a01593da0e4be2af9d9f5fa8 with gcc (GCC) 8.1.0 kernel signature: 6a92b250d6d0137cc33d654cc5f8110a509f274c60bf1eafa20399aa4248b283 run #0: OK run #1: crashed: INFO: task hung in synchronize_rcu run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in nfnetlink_rcv_msg run #4: crashed: INFO: task hung in synchronize_rcu run #5: crashed: INFO: task hung in nfnetlink_rcv_msg run #6: crashed: INFO: rcu detected stall in ip_set_uadd run #7: crashed: INFO: task hung in corrupted 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-executor133262077" "root@10.128.15.193:./syz-executor133262077"]: exit status 1 ssh: connect to host 10.128.15.193 port 22: Connection timed out lost connection 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-executor191653432" "root@10.128.10.63:./syz-executor191653432"]: exit status 1 Connection timed out during banner exchange lost connection # git bisect bad a504b703bb1da526a01593da0e4be2af9d9f5fa8 Bisecting: 6 revisions left to test after this (roughly 3 steps) [b9660987692230b381b64c1f1e912febe142c390] netfilter: nf_flow_table: simplify nf_flow_offload_gc_step() testing commit b9660987692230b381b64c1f1e912febe142c390 with gcc (GCC) 8.1.0 kernel signature: 2e03e64b8050ad4d159a54af009bbc593617b78d1314101ae80f4e1efd418e70 run #0: crashed: INFO: task hung in corrupted run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in synchronize_rcu run #4: crashed: INFO: task hung in synchronize_rcu 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-executor027304833" "root@10.128.0.192:./syz-executor027304833"]: exit status 1 ssh: connect to host 10.128.0.192 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-executor621161196" "root@10.128.1.60:./syz-executor621161196"]: exit status 1 ssh: connect to host 10.128.1.60 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-executor286575451" "root@10.128.0.244:./syz-executor286575451"]: exit status 1 ssh: connect to host 10.128.0.244 port 22: Connection timed out lost connection run #8: OK run #9: crashed: INFO: rcu detected stall in cache_reap # git bisect bad b9660987692230b381b64c1f1e912febe142c390 Bisecting: 3 revisions left to test after this (roughly 2 steps) [23c42a403a9cfdbad6004a556c927be7dd61a8ee] netfilter: ipset: Introduction of new commands and protocol version 7 testing commit 23c42a403a9cfdbad6004a556c927be7dd61a8ee with gcc (GCC) 8.1.0 kernel signature: 1f053987d267ea947ec866acba8c35a9cee05b9bbf2c7fe97cf8eeff347d3192 run #0: crashed: INFO: task hung in corrupted run #1: crashed: INFO: task hung in nfnetlink_rcv_msg run #2: crashed: INFO: task hung in nfnetlink_rcv_msg run #3: crashed: INFO: task hung in nfnetlink_rcv_msg run #4: crashed: INFO: task hung in nfnetlink_rcv_msg 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-executor656006335" "root@10.128.15.201:./syz-executor656006335"]: exit status 1 Connection timed out during banner exchange 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-executor358236946" "root@10.128.15.203:./syz-executor358236946"]: exit status 1 ssh: connect to host 10.128.15.203 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-executor581904713" "root@10.128.15.204:./syz-executor581904713"]: exit status 1 Connection timed out during banner exchange lost connection run #8: OK run #9: OK # git bisect bad 23c42a403a9cfdbad6004a556c927be7dd61a8ee Bisecting: 0 revisions left to test after this (roughly 1 step) [29edbc3ebdb0faa934114f14bf12fc0b784d4f1b] netfilter: ipset: Make invalid MAC address checks consistent testing commit 29edbc3ebdb0faa934114f14bf12fc0b784d4f1b with gcc (GCC) 8.1.0 kernel signature: 05a7ef9a716248678b44aa39974362432f961a3ea8cfbb41775318fc75e3c64c all runs: OK # git bisect good 29edbc3ebdb0faa934114f14bf12fc0b784d4f1b 23c42a403a9cfdbad6004a556c927be7dd61a8ee is the first bad commit commit 23c42a403a9cfdbad6004a556c927be7dd61a8ee Author: Jozsef Kadlecsik Date: Sat Oct 27 15:07:40 2018 +0200 netfilter: ipset: Introduction of new commands and protocol version 7 Two new commands (IPSET_CMD_GET_BYNAME, IPSET_CMD_GET_BYINDEX) are introduced. The new commands makes possible to eliminate the getsockopt operation (in iptables set/SET match/target) and thus use only netlink communication between userspace and kernel for ipset. With the new protocol version, userspace can exactly know which functionality is supported by the running kernel. Both the kernel and userspace is fully backward compatible. Signed-off-by: Jozsef Kadlecsik include/linux/netfilter/ipset/ip_set.h | 2 +- include/uapi/linux/netfilter/ipset/ip_set.h | 19 ++-- net/netfilter/ipset/ip_set_core.c | 164 +++++++++++++++++++++++++--- 3 files changed, 160 insertions(+), 25 deletions(-) culprit signature: 1f053987d267ea947ec866acba8c35a9cee05b9bbf2c7fe97cf8eeff347d3192 parent signature: 05a7ef9a716248678b44aa39974362432f961a3ea8cfbb41775318fc75e3c64c revisions tested: 20, total time: 5h26m45.748323295s (build: 1h57m56.582535185s, test: 3h26m38.337303504s) first bad commit: 23c42a403a9cfdbad6004a556c927be7dd61a8ee netfilter: ipset: Introduction of new commands and protocol version 7 cc: ["coreteam@netfilter.org" "davem@davemloft.net" "fw@strlen.de" "kadlec@blackhole.kfki.hu" "linux-kernel@vger.kernel.org" "netdev@vger.kernel.org" "netfilter-devel@vger.kernel.org" "pablo@netfilter.org"] crash: INFO: task hung in nfnetlink_rcv_msg NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 Set syz2 is full, maxelem 65536 reached Set syz2 is full, maxelem 65536 reached Set syz2 is full, maxelem 65536 reached INFO: task syz-executor.2:6726 blocked for more than 140 seconds. Not tainted 4.19.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28368 6726 6577 0x20020004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x78c/0x1c00 kernel/sched/core.c:3473 schedule+0x7f/0x1b0 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x806/0x1210 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 nfnl_lock net/netfilter/nfnetlink.c:62 [inline] nfnetlink_rcv_msg+0x6f6/0xc10 net/netfilter/nfnetlink.c:223 netlink_rcv_skb+0x142/0x390 net/netlink/af_netlink.c:2476 nfnetlink_rcv+0x163/0x3b0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:631 ___sys_sendmsg+0x647/0x950 net/socket.c:2116 __sys_sendmsg+0xd9/0x180 net/socket.c:2154 __compat_sys_sendmsg net/compat.c:754 [inline] __do_compat_sys_sendmsg net/compat.c:761 [inline] __se_compat_sys_sendmsg net/compat.c:758 [inline] __ia32_compat_sys_sendmsg+0x75/0xb0 net/compat.c:758 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x235/0xa5a arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fa3ca9 Code: Bad RIP value. RSP: 002b:00000000f7f5d0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.4:6725 blocked for more than 140 seconds. Not tainted 4.19.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28432 6725 6574 0x20020004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x78c/0x1c00 kernel/sched/core.c:3473 schedule+0x7f/0x1b0 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x806/0x1210 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 nfnl_lock net/netfilter/nfnetlink.c:62 [inline] nfnetlink_rcv_msg+0x6f6/0xc10 net/netfilter/nfnetlink.c:223 netlink_rcv_skb+0x142/0x390 net/netlink/af_netlink.c:2476 nfnetlink_rcv+0x163/0x3b0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:631 ___sys_sendmsg+0x647/0x950 net/socket.c:2116 __sys_sendmsg+0xd9/0x180 net/socket.c:2154 __compat_sys_sendmsg net/compat.c:754 [inline] __do_compat_sys_sendmsg net/compat.c:761 [inline] __se_compat_sys_sendmsg net/compat.c:758 [inline] __ia32_compat_sys_sendmsg+0x75/0xb0 net/compat.c:758 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x235/0xa5a arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fb7ca9 Code: Bad RIP value. RSP: 002b:00000000f7f920cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000d00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.4:6730 blocked for more than 140 seconds. Not tainted 4.19.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28480 6730 6574 0x20020004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x78c/0x1c00 kernel/sched/core.c:3473 Set syz2 is full, maxelem 65536 reached schedule+0x7f/0x1b0 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x806/0x1210 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 nfnl_lock net/netfilter/nfnetlink.c:62 [inline] nfnetlink_rcv_msg+0x6f6/0xc10 net/netfilter/nfnetlink.c:223 netlink_rcv_skb+0x142/0x390 net/netlink/af_netlink.c:2476 nfnetlink_rcv+0x163/0x3b0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:631 ___sys_sendmsg+0x647/0x950 net/socket.c:2116 __sys_sendmsg+0xd9/0x180 net/socket.c:2154 __compat_sys_sendmsg net/compat.c:754 [inline] __do_compat_sys_sendmsg net/compat.c:761 [inline] __se_compat_sys_sendmsg net/compat.c:758 [inline] __ia32_compat_sys_sendmsg+0x75/0xb0 net/compat.c:758 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x235/0xa5a arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fb7ca9 Code: Bad RIP value. RSP: 002b:00000000f7f710cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:6728 blocked for more than 140 seconds. Not tainted 4.19.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28480 6728 6576 0x20020004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x78c/0x1c00 kernel/sched/core.c:3473 schedule+0x7f/0x1b0 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x806/0x1210 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 nfnl_lock net/netfilter/nfnetlink.c:62 [inline] nfnetlink_rcv_msg+0x6f6/0xc10 net/netfilter/nfnetlink.c:223 netlink_rcv_skb+0x142/0x390 net/netlink/af_netlink.c:2476 nfnetlink_rcv+0x163/0x3b0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:631 ___sys_sendmsg+0x647/0x950 net/socket.c:2116 __sys_sendmsg+0xd9/0x180 net/socket.c:2154 __compat_sys_sendmsg net/compat.c:754 [inline] __do_compat_sys_sendmsg net/compat.c:761 [inline] __se_compat_sys_sendmsg net/compat.c:758 [inline] __ia32_compat_sys_sendmsg+0x75/0xb0 net/compat.c:758 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x235/0xa5a arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f69ca9 Code: Bad RIP value. RSP: 002b:00000000f7f230cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1071 Comm: khungtaskd Not tainted 4.19.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x109/0x15a lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x3e/0x76 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf5/0x119 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0x57c/0x9d0 kernel/hung_task.c:265 kthread+0x324/0x3e0 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6725 Comm: syz-executor.4 Not tainted 4.19.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hash_ip4_expire.isra.14+0x1fc/0x7d0 net/netfilter/ipset/ip_set_hash_gen.h:479 Code: 78 44 4c 89 ca 4c 89 ce 48 c1 ea 03 83 e6 07 42 0f b6 14 32 40 38 f2 7f 08 84 d2 0f 85 94 03 00 00 41 0f b6 57 19 49 83 c4 01 <48> 03 5d d0 44 39 e2 0f 86 c3 00 00 00 4d 0f a3 20 0f 82 6b ff ff RSP: 0018:ffff88009068eed0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffff88008238bf40 RCX: ffff88008238bf00 RDX: 0000000000000003 RSI: 0000000000000001 RDI: ffff88009af81998 RBP: ffff88009068ef78 R08: ffff88008238bf10 R09: ffff88008238bf19 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003 R13: ffff88009af81900 R14: dffffc0000000000 R15: ffff88008238bf00 FS: 0000000000000000(0000) GS:ffff8800aea00000(0063) knlGS:00000000f7f92b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7f7ebb0 CR3: 0000000091cce000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hash_ip4_add+0x6b1/0x1f47 net/netfilter/ipset/ip_set_hash_gen.h:713 hash_ip4_uadt+0x47c/0x700 net/netfilter/ipset/ip_set_hash_ip.c:155 call_ad+0x178/0x530 net/netfilter/ipset/ip_set_core.c:1515 ip_set_uadd+0x403/0xae0 net/netfilter/ipset/ip_set_core.c:1596 nfnetlink_rcv_msg+0x942/0xc10 net/netfilter/nfnetlink.c:228 netlink_rcv_skb+0x142/0x390 net/netlink/af_netlink.c:2476 nfnetlink_rcv+0x163/0x3b0 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:631 ___sys_sendmsg+0x647/0x950 net/socket.c:2116 __sys_sendmsg+0xd9/0x180 net/socket.c:2154 __compat_sys_sendmsg net/compat.c:754 [inline] __do_compat_sys_sendmsg net/compat.c:761 [inline] __se_compat_sys_sendmsg net/compat.c:758 [inline] __ia32_compat_sys_sendmsg+0x75/0xb0 net/compat.c:758 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x235/0xa5a arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fb7ca9 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7f920cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000d00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000