ci2 starts bisection 2026-01-19 07:11:06.203415184 +0000 UTC m=+209253.384698516
bisecting fixing commit since 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e
building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4
ensuring issue is reproducible on original commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e

testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 7ac46ee73272f4e813678bd4c1d7be14a3c120206c0de1dcc28d49322baf8c95
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
run #10: crashed: possible deadlock in bd_prepare_to_claim
run #11: crashed: possible deadlock in bd_prepare_to_claim
run #12: crashed: possible deadlock in bd_prepare_to_claim
run #13: crashed: possible deadlock in bd_prepare_to_claim
run #14: crashed: possible deadlock in bd_prepare_to_claim
run #15: crashed: possible deadlock in bd_prepare_to_claim
run #16: crashed: possible deadlock in bd_prepare_to_claim
run #17: crashed: possible deadlock in bd_prepare_to_claim
run #18: crashed: possible deadlock in bd_prepare_to_claim
run #19: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
check whether we can drop unnecessary instrumentation
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 400e513fcbaf052d1ff9b148bc969a04241eeee0275fa6b84a8d0b165dfbe344
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: possible deadlock in bd_prepare_to_claim
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the bug reproduces without the instrumentation
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
kconfig minimization: base=3913 full=7799 leaves diff=2159
split chunks (needed=false): <2159>
split chunk #0 of len 2159 into 5 parts
testing without sub-chunk 1/5
disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 588bc1f430ece5abd18f3a4e28873bd16f8300b529556c363881ed0a0e22e6ab
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 8c56bc599269fa0497430c154abf51512f9cb4642eaf2d464e8dd30dd2f2f872
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: possible deadlock in bd_prepare_to_claim
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 77cb72e098aab52ceb5f09db5203d99a4c3cce3dffb9586b2d10d0a0f3cd5347
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: crashed: possible deadlock in bd_prepare_to_claim
run #2: crashed: possible deadlock in bd_prepare_to_claim
run #3: crashed: possible deadlock in bd_prepare_to_claim
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 35c75dd919f4c7e60a9e0b92a4a20031e1e49b12376fec37316a078d18167720
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: 8e7d2b9c8f14d3547f444b7ab5248a6b99629d431ac5ee9be778df22d11a018a
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: possible deadlock in bd_prepare_to_claim
run #4: crashed: possible deadlock in bd_prepare_to_claim
run #5: crashed: possible deadlock in bd_prepare_to_claim
run #6: crashed: possible deadlock in bd_prepare_to_claim
run #7: crashed: possible deadlock in bd_prepare_to_claim
run #8: crashed: possible deadlock in bd_prepare_to_claim
run #9: crashed: possible deadlock in bd_prepare_to_claim
representative crash: possible deadlock in bd_prepare_to_claim, types: [LOCKDEP]
the chunk can be dropped
disabling configs for [kasan atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
determining the merge base between 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e and 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7
ffc253263a1375a65fa6c9f62a893e9767fbebfa/Linux 6.6 is a merge base, check if it has the bug
testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
kernel signature: b64f6663f07f16fecb1761991f2a68571cc2ef92d3ba9318f9dfd2da658fccd2
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
false negative chance: 0.000
reproducer does not crash the merge base, so there's no known bad commit
revisions tested: 8, total time: 1h47m34.129730152s (build: 48m33.232314224s, test: 53m10.438171625s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.6