ci2 starts bisection 2023-06-29 04:54:59.751208978 +0000 UTC m=+42038.663012273 bisecting fixing commit since a343b0dd87b42ba9d508fbf7d0c06f744c2e0954 building syzkaller on cf1845599c0bdab59c69518eaa0ecb960ec7ddf0 ensuring issue is reproducible on original commit a343b0dd87b42ba9d508fbf7d0c06f744c2e0954 testing commit a343b0dd87b42ba9d508fbf7d0c06f744c2e0954 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: c403050ee2ef1a7a24c99a28126f16222f76045a385f9fda50a4a785206e56af all runs: crashed: WARNING in print_bfs_bug testing current HEAD a1c449d00ff8ce2c5fcea5f755df682d1f6bc2ef testing commit a1c449d00ff8ce2c5fcea5f755df682d1f6bc2ef gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f749f08b6aa98cf71c98242079a86feba4c65ff72b9fe656248237866f3108b7 all runs: crashed: WARNING in print_bfs_bug crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 1h7m21.991149447s (build: 56m4.904401338s, test: 10m26.66684399s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 6.1.36 crash: WARNING in print_bfs_bug ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 3900 at kernel/locking/lockdep.c:2067 print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2067 Modules linked in: CPU: 0 PID: 3900 Comm: syz-executor.0 Not tainted 6.1.36-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2067 Code: ff ff e8 91 f9 22 08 90 55 53 89 fb e8 17 fe 69 02 89 c5 e8 a0 1e ff ff 85 ed 74 10 48 c7 c7 80 93 eb 89 89 de e8 4e 8a e9 ff <0f> 0b 5b 5d c3 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 RSP: 0018:ffffc9000469ec88 EFLAGS: 00010046 RAX: b0f855dc56fc8600 RBX: 00000000ffffffff RCX: 0000000000000004 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed1017384f1c R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff9043b4a8 R13: 000000000001f301 R14: ffffffff8ee1d7d0 R15: ffffffff9043b2e8 FS: 000055555614d400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3b9ed56be CR3: 000000001e1e1000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage kernel/locking/lockdep.c:2792 [inline] check_prev_add kernel/locking/lockdep.c:3102 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x4107/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 alloc_object+0x1ba/0x6c0 lib/debugobjects.c:233 lookup_object_or_alloc lib/debugobjects.c:578 [inline] debug_object_activate+0x240/0x860 lib/debugobjects.c:699 debug_rcu_head_queue kernel/rcu/rcu.h:189 [inline] call_rcu+0x93/0xa10 kernel/rcu/tree.c:2784 __dentry_kill+0x41b/0x560 fs/dcache.c:621 shrink_dentry_list+0x2a0/0x550 fs/dcache.c:1201 prune_dcache_sb+0x106/0x170 fs/dcache.c:1282 super_cache_scan+0x2b3/0x3d0 fs/super.c:104 do_shrink_slab+0x440/0xba0 mm/vmscan.c:846 shrink_slab_memcg mm/vmscan.c:915 [inline] shrink_slab+0x46e/0x720 mm/vmscan.c:994 shrink_node_memcgs mm/vmscan.c:6129 [inline] shrink_node+0x729/0x22a0 mm/vmscan.c:6158 shrink_zones mm/vmscan.c:6396 [inline] do_try_to_free_pages+0x773/0x16e0 mm/vmscan.c:6458 try_to_free_mem_cgroup_pages+0x3cb/0x910 mm/vmscan.c:6773 reclaim_high+0x1dd/0x260 mm/memcontrol.c:2389 mem_cgroup_handle_over_high+0x146/0x2b0 mm/memcontrol.c:2574 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline] exit_to_user_mode_loop+0x96/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd3b9289e9b Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00 RSP: 002b:00007fff30d6aca0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: 0000000000001d63 RBX: 0000000000000000 RCX: 00007fd3b9289e9b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 000055555614d400 R10: 000055555614d6d0 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff30d6ad80