ci2 starts bisection 2025-11-18 12:45:25.371963233 +0000 UTC m=+89408.174979309
bisecting fixing commit since da3c5173c55f7a0cf65c967d864386c79dcba3f7
building syzkaller on 4b25d554e5643186ba6a09429089ac0275f7573b
ensuring issue is reproducible on original commit da3c5173c55f7a0cf65c967d864386c79dcba3f7

testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 7a77db23e699023570870a0826da545094dc0451962288f60f08b36616b0ec52
run #0: crashed: INFO: task hung in rtnetlink_rcv_msg
run #1: crashed: INFO: task hung in rtnl_lock
run #2: crashed: INFO: task hung in rtnl_lock
run #3: crashed: INFO: task hung in rtnl_lock
run #4: crashed: INFO: task hung in rtnl_lock
run #5: crashed: INFO: task hung in rtnl_lock
run #6: crashed: INFO: task hung in rtnl_lock
run #7: crashed: INFO: task hung in rtnl_lock
run #8: crashed: INFO: task hung in rtnl_lock
run #9: crashed: INFO: task hung in rtnl_lock
run #10: crashed: INFO: task hung in rtnl_lock
run #11: crashed: INFO: task hung in rtnl_lock
run #12: crashed: INFO: task hung in rtnl_lock
run #13: crashed: INFO: task hung in rtnl_lock
run #14: crashed: INFO: task hung in rtnl_lock
run #15: crashed: INFO: task hung in __netlink_dump_start
run #16: crashed: INFO: task hung in rtnl_lock
run #17: crashed: INFO: task hung in rtnl_lock
run #18: OK
run #19: OK
representative crash: INFO: task hung in rtnetlink_rcv_msg, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: cfdbdca18c08f2209a3e653ce4694d69568be2a177c0e2fc5165d901f4071ad2
run #0: crashed: INFO: task hung in rtnl_lock
run #1: crashed: INFO: task hung in rtnl_lock
run #2: crashed: INFO: task hung in rtnetlink_rcv_msg
run #3: crashed: INFO: task hung in rtnetlink_rcv_msg
run #4: crashed: INFO: task hung in rtnetlink_rcv_msg
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
kconfig minimization: base=7505 full=9708 leaves diff=1996
split chunks (needed=false): <1996>
split chunk #0 of len 1996 into 5 parts
testing without sub-chunk 1/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: aae5f7244a2503ee73704211ce410b540f801ee9d8820c62b7af86ac730f6190
run #0: crashed: INFO: task hung in rtnl_lock
run #1: crashed: INFO: task hung in rtnl_lock
run #2: crashed: INFO: task hung in rtnl_lock
run #3: crashed: INFO: task hung in rtnl_lock
run #4: crashed: INFO: task hung in rtnl_lock
run #5: crashed: INFO: task hung in rtnl_lock
run #6: crashed: INFO: task hung in rtnetlink_rcv_msg
run #7: crashed: INFO: task hung in rtnl_lock
run #8: OK
run #9: OK
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: e12e3d80b5f5ee28d422f5707665ad285d38ade916df1d979a9067ebff3df706
run #0: crashed: INFO: task hung in rtnl_lock
run #1: crashed: INFO: task hung in rtnl_lock
run #2: crashed: INFO: task hung in rtnl_lock
run #3: crashed: INFO: task hung in rtnl_lock
run #4: crashed: INFO: task hung in rtnetlink_rcv_msg
run #5: crashed: INFO: task hung in rtnl_lock
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 0a721d9e3ecb227bf8288bcade512cfc70379e66d7d0dc74e5541500bef3739a
all runs: crashed: INFO: task hung in rtnl_lock
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: ab193cdd1c4de57143f625a5ea78d854503aad906c5e0fd3d393a66e135e3b65
all runs: crashed: INFO: task hung in rtnl_lock
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit da3c5173c55f7a0cf65c967d864386c79dcba3f7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 326c0370d5e48c0fab19fa803b6fe72fb8b1ad6f3456dfc205a801e4c5c2e4f2
all runs: crashed: INFO: task hung in rtnl_lock
representative crash: INFO: task hung in rtnl_lock, types: [HANG]
the chunk can be dropped
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
determining the merge base between da3c5173c55f7a0cf65c967d864386c79dcba3f7 and e7c375b181600caf135cfd03eadbc45eb530f2cb
830b3c68c1fb1e9176028d02ef86f3cf76aa2476/Linux 6.1 is a merge base, check if it has the bug
testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: a75146e414bc69a82100955fc0a68a9622660da4d3cf9cb6d38e2bcaa02c93f9
run #0: basic kernel testing failed: BUG: ADDR [#NUM] PREEMPT SMP
run #1: basic kernel testing failed: BUG: ADDR [#NUM] PREEMPT SMP
run #2: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.10.8:./syz-execprog"]
run #3: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.10.11:./syz-execprog"]
run #4: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.1.251:./syz-execprog"]
run #5: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.0.43:./syz-execprog"]
run #6: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.10.2:./syz-execprog"]
run #7: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.0.173:./syz-execprog"]
run #8: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.1.162:./syz-execprog"]
run #9: basic kernel testing failed: failed to copy syz-execprog to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_arm64/syz-execprog" "root@10.128.10.7:./syz-execprog"]
unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0
reproducer does not crash the merge base, so there's no known bad commit
revisions tested: 8, total time: 2h2m56.098575033s (build: 59m3.625200513s, test: 57m37.880644234s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1