ci2 starts bisection 2023-07-10 05:35:32.806381041 +0000 UTC m=+221526.386931437
bisecting fixing commit since d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb
building syzkaller on a4ae4f428721da42ac15f07d6f3b54584dedee27
ensuring issue is reproducible on original commit d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb

testing commit d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 48c2e66910420cfc80fb45998eb016d040e403f556e96cfc5291059ce7719eff
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: kernel BUG in btrfs_exclop_balance
run #5: crashed: kernel BUG in btrfs_exclop_balance
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: kernel BUG in btrfs_exclop_balance
run #11: crashed: kernel BUG in btrfs_exclop_balance
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: kernel BUG in btrfs_exclop_balance
run #17: crashed: kernel BUG in btrfs_exclop_balance
run #18: crashed: INFO: rcu detected stall in corrupted
run #19: crashed: INFO: rcu detected stall in corrupted
run #20: crashed: INFO: rcu detected stall in corrupted
run #21: crashed: INFO: rcu detected stall in corrupted
run #22: crashed: INFO: rcu detected stall in corrupted
run #23: crashed: INFO: rcu detected stall in corrupted
run #24: crashed: INFO: rcu detected stall in corrupted
run #25: crashed: INFO: rcu detected stall in corrupted
run #26: crashed: INFO: rcu detected stall in corrupted
run #27: crashed: INFO: rcu detected stall in corrupted
run #28: crashed: kernel BUG in btrfs_exclop_balance
run #29: crashed: kernel BUG in btrfs_exclop_balance
run #30: crashed: kernel BUG in btrfs_exclop_balance
run #31: crashed: kernel BUG in btrfs_exclop_balance
run #32: crashed: kernel BUG in btrfs_exclop_balance
run #33: crashed: kernel BUG in btrfs_exclop_balance
run #34: crashed: kernel BUG in btrfs_exclop_balance
run #35: crashed: kernel BUG in btrfs_exclop_balance
run #36: crashed: kernel BUG in btrfs_exclop_balance
run #37: crashed: kernel BUG in btrfs_exclop_balance
run #38: OK
representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f9bdddaaa2ef47f5e5355dd759b358a7ba04efbd32e01e72f6556adcbc6b449d
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: kernel BUG in btrfs_exclop_balance
run #5: crashed: kernel BUG in btrfs_exclop_balance
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: INFO: rcu detected stall in corrupted
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: INFO: rcu detected stall in corrupted
run #17: crashed: INFO: rcu detected stall in corrupted
run #18: crashed: kernel BUG in btrfs_exclop_balance
run #19: crashed: kernel BUG in btrfs_exclop_balance
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 61fd484b2cf6bc8022e8e5ea6f693a9991740ac2
testing commit 61fd484b2cf6bc8022e8e5ea6f693a9991740ac2 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: cd9d12dc3c87ab25b5babd958179132884817f3b9b2f7c69be26cd9fd620aa62
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: kernel BUG in btrfs_exclop_balance
run #9: crashed: kernel BUG in btrfs_exclop_balance
run #10: crashed: INFO: rcu detected stall in corrupted
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: kernel BUG in btrfs_exclop_balance
run #13: crashed: kernel BUG in btrfs_exclop_balance
run #14: crashed: kernel BUG in btrfs_exclop_balance
run #15: crashed: kernel BUG in btrfs_exclop_balance
run #16: crashed: kernel BUG in btrfs_exclop_balance
run #17: crashed: kernel BUG in btrfs_exclop_balance
run #18: crashed: kernel BUG in btrfs_exclop_balance
run #19: crashed: kernel BUG in btrfs_exclop_balance
representative crash: INFO: rcu detected stall in corrupted, types: [HANG BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 3, total time: 2h16m33.551605362s (build: 1h32m40.721342771s, test: 22m26.390343716s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 6.1.38
crash: INFO: rcu detected stall in corrupted
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P3832 } 2664 jiffies s: 2801 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):