ci2 starts bisection 2026-01-06 23:19:54.081279441 +0000 UTC m=+3577806.258402508
bisecting fixing commit since 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4
building syzkaller on 86341da6b45d602116fb0c60fac1641c24aedbe9
ensuring issue is reproducible on original commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4

testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: acbc781ea48a6d22dd591464aeea44ee7ed9ebb257ed00c7067d11e3d43b8f9c
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 45f9839a4e6e397bb94dcf802b9323e92123b59cf367031ff2636e5c07c84a32
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
kconfig minimization: base=3829 full=7619 leaves diff=2129
split chunks (needed=false): <2129>
split chunk #0 of len 2129 into 5 parts
testing without sub-chunk 1/5
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 182eb3d3e8a7911035d60e70f48ac89250c4b930bbd8f309509d0fcf16f2a4f2
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, 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 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: fe3b3d339a6d4cd8a246f3f7a7d68d70c2fd032dc45e9f6d8d59c6a568a8942e
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: b5116aa2405b9ed358f3ec7f622577e4e3bfce7f56c0a2afb35721b14df71ef8
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: ba9e9c593611c38760c5f59bd2baa4cee9e9a2adb0c5bb5a9ea9f1fa27342e69
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 6af575e5ac03fcc779875b52c6a148405a177b478ff0fa9845bb29fc54f9d887
all runs: crashed: INFO: task hung in __fdget_pos
representative crash: INFO: task hung in __fdget_pos, types: [HANG]
the chunk can be dropped
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
determining the merge base between 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 and f0b9d8eb98dfee8d00419aa07543bdc2c1a44fb1
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
failed building 830b3c68c1fb1e9176028d02ef86f3cf76aa2476: ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined
llvm-objdump: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
llvm-objcopy: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
reproducer does not crash the merge base, so there's no known bad commit
revisions tested: 7, total time: 2h3m49.470926795s (build: 1h1m25.623244387s, test: 53m48.67587768s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1