===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.5/4371 is trying to release lock (rcu_read_lock) at: [] __wait_on_freeing_inode+0x105/0x350 but there are no more locks to release! other info that might help us debug this: 4 locks held by syz-executor.5/4371: #0: ffff88800f73e3f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff88803dc82a00 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f87a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890 stack backtrace: CPU: 0 UID: 0 PID: 4371 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_unlock_imbalance_bug+0x118/0x130 lock_release+0x1ee/0x270 __wait_on_freeing_inode+0x10a/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e22413b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1e1f989188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f1e22526f60 RCX: 00007f1e22413b19 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000200 RBP: 00007f1e2246df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdef8708ff R14: 00007f1e1f989300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4371 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.5/4371 Modules linked in: CPU: 0 UID: 0 PID: 4371 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_exp_handler+0x12b/0x570 Code: 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 cb 03 00 00 0f b6 43 11 84 c0 75 b6 85 c9 74 1d 0f 8f bf 00 00 00 90 <0f> 0b 90 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6f ae 74 03 RSP: 0018:ffff88806ce085b0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801db99b80 RDI: ffff88801db99f7c RBP: ffffffff85e310c0 R08: 0000000000000000 R09: fffffbfff0ccdc6a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31138 R15: ffff88806ce38820 FS: 00007f1e1f989700(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1e22523000 CR3: 000000000cec7000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0x5f/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:__report_bug+0x4cf/0x5b0 Code: 0f b6 14 28 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b0 00 00 00 48 63 2b 4c 89 e7 48 01 dd 48 89 ee e8 51 5a b0 fc <49> 39 ec 74 22 e8 b7 5f b0 fc 48 83 c3 10 48 81 fb 10 86 6c 86 72 RSP: 0018:ffff88806ce08720 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8667d4c0 RCX: ffffffff84c51bdf RDX: ffff88801db99b80 RSI: ffffffff815d6d6f RDI: 0000000000000006 RBP: ffffffff814a218f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff814a218f R11: 0000000000000000 R12: ffffffff815d6d6f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88806ce08970 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801db99b80 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8135f942 RDI: ffff88801db99f7c RBP: ffff88801db99b80 R08: 0000000000000001 R09: ffff88806ce08a50 R10: 000000000003d1db R11: 00000000000c7b10 R12: ffff88801db99b80 R13: ffff88806ce08a58 R14: ffff888020547f48 R15: ffff88806ce08a10 unwind_next_frame+0x3bc/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_record_aux_stack+0x89/0xa0 __call_rcu_common.constprop.0+0x70/0xad0 kfree+0x319/0x5d0 neigh_rcu_free_parms+0x6c/0xa0 rcu_core+0x543/0x1b30 handle_softirqs+0x1b1/0x7d0 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:vprintk_store+0x17f/0xa30 Code: e8 e6 f6 1f 00 41 80 fd 03 0f 86 ce 00 00 00 e8 17 fc 1f 00 48 89 ee 31 ff 45 31 ff e8 5a f7 1f 00 48 85 ed 0f 85 6c 04 00 00 fc fb 1f 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7 RSP: 0018:ffff888020546f38 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88806ce244a5 RCX: ffffffff817df7eb RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81558415 RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e357 R11: 0000000000000001 R12: 0000000000000062 R13: 0000000000000002 R14: ffffffff85d4aef0 R15: 0000000000000062 vprintk_emit+0x13c/0x680 _printk+0xbe/0xf0 __warn+0xa5/0x370 __report_bug+0x421/0x5b0 report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff888020547510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801db99b80 RCX: ffffc90001de8000 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801db99f7c RBP: ffff88801db99b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801db99b80 R13: 0000000000000001 R14: ffffffff85c10da0 R15: ffff88801bbf32c0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e22413b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1e1f989188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f1e22526f60 RCX: 00007f1e22413b19 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000200 RBP: 00007f1e2246df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdef8708ff R14: 00007f1e1f989300 R15: 0000000000022000 irq event stamp: 137 hardirqs last enabled at (137): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (136): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (132): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (130): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Modules linked in: CPU: 0 UID: 0 PID: 4371 Comm: syz-executor.5 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff888020547510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801db99b80 RCX: ffffc90001de8000 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801db99f7c RBP: ffff88801db99b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801db99b80 R13: 0000000000000001 R14: ffffffff85c10da0 R15: ffff88801bbf32c0 FS: 00007f1e1f989700(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1e22523000 CR3: 000000000cec7000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e22413b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1e1f989188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f1e22526f60 RCX: 00007f1e22413b19 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000200 RBP: 00007f1e2246df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdef8708ff R14: 00007f1e1f989300 R15: 0000000000022000 irq event stamp: 137 hardirqs last enabled at (137): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (136): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (132): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (130): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0f b6 14 28 movzbl (%rax,%rbp,1),%edx 4: 48 89 d8 mov %rbx,%rax 7: 83 e0 07 and $0x7,%eax a: 83 c0 03 add $0x3,%eax d: 38 d0 cmp %dl,%al f: 7c 08 jl 0x19 11: 84 d2 test %dl,%dl 13: 0f 85 b0 00 00 00 jne 0xc9 19: 48 63 2b movslq (%rbx),%rbp 1c: 4c 89 e7 mov %r12,%rdi 1f: 48 01 dd add %rbx,%rbp 22: 48 89 ee mov %rbp,%rsi 25: e8 51 5a b0 fc callq 0xfcb05a7b * 2a: 49 39 ec cmp %rbp,%r12 <-- trapping instruction 2d: 74 22 je 0x51 2f: e8 b7 5f b0 fc callq 0xfcb05feb 34: 48 83 c3 10 add $0x10,%rbx 38: 48 81 fb 10 86 6c 86 cmp $0xffffffff866c8610,%rbx 3f: 72 .byte 0x72