===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.0/6551 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.0/6551: #0: ffff88800faaa3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880495a6330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800faae950 (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: 1 UID: 0 PID: 6551 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260116 #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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc11a0ef427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffeec30eec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc11a0ef427 RDX: ffffffffffffffbc RSI: 00007fc11a14a00e RDI: 00007fc11a1491dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffeec30e940 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffeec30ef90 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/6551 Modules linked in: CPU: 1 UID: 0 PID: 6551 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#1: syz-executor.0/6551 Modules linked in: CPU: 1 UID: 0 PID: 6551 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260116 #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 d7 74 03 RSP: 0018:ffff88806cf085a0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806cf38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801aecb700 RDI: ffff88801aecbafc RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806cf38811 R13: ffff88806cf38828 R14: ffffffff85e31378 R15: ffff88806cf38820 FS: 0000555587f8f400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc11a16f540 CR3: 0000000013d82000 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:__sanitizer_cov_trace_cmp8+0x0/0x20 Code: 0c 24 89 f2 89 fe bf 04 00 00 00 e9 da fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 a8 fe RSP: 0018:ffff88806cf08718 EFLAGS: 00000287 RAX: 0000000000000003 RBX: ffffffff866830c0 RCX: ffffffff84c54bdf RDX: 0000000000000000 RSI: ffffffff815cf088 RDI: ffffffff815d742f RBP: ffffffff815cf088 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815cf067 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88806cf08970 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801aecb700 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88801aecbafc RBP: ffff88801aecb700 R08: ffffffff86eb37b4 R09: ffffffff84e98ac0 R10: 000000000003d20b R11: 00000000000c5e24 R12: ffff88801aecb700 R13: ffff88806cf08a58 R14: ffff88804a4d7890 R15: ffff88806cf08a10 unwind_next_frame+0x3bc/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x43/0x70 kfree+0x149/0x5d0 slab_free_after_rcu_debug+0x6c/0x260 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:console_flush_one_record+0x900/0xb70 Code: 8b 04 24 48 c1 e8 03 42 80 3c 38 00 0f 85 53 02 00 00 4d 89 65 58 e9 41 ff ff ff e8 da dc 1f 00 e8 d5 58 28 00 fb 48 8b 04 24 <48> c1 e8 03 42 80 3c 38 00 0f 84 1f ff ff ff 48 8b 3c 24 e8 08 2b RSP: 0018:ffff88804a4d7300 EFLAGS: 00000246 RAX: ffffffff86155b78 RBX: 0000000000000001 RCX: ffffffff817dfeab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8155a58b RBP: ffff88804a4d7460 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e857 R11: 000000003a504952 R12: 0000000000000200 R13: ffffffff86155b20 R14: 0000000000000000 R15: dffffc0000000000 __console_flush_and_unlock+0xb1/0x1d0 vprintk_emit+0x4b5/0x680 _printk+0xbe/0xf0 show_iret_regs+0x26/0x60 __show_regs+0x2a/0x750 show_regs+0x33/0x60 __warn+0xfc/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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88804a4d79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801aecb700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801aecbafc RBP: ffff88801aecb700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801aecb700 R13: 0000000000000001 R14: ffffffff85c0cc50 R15: ffff8880494fb2c0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc11a0ef427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffeec30eec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc11a0ef427 RDX: ffffffffffffffbc RSI: 00007fc11a14a00e RDI: 00007fc11a1491dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffeec30e940 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffeec30ef90 irq event stamp: 675 hardirqs last enabled at (675): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (674): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (670): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (668): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88804a4d79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801aecb700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801aecbafc RBP: ffff88801aecb700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801aecb700 R13: 0000000000000001 R14: ffffffff85c0cc50 R15: ffff8880494fb2c0 FS: 0000555587f8f400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc11a16f540 CR3: 0000000013d82000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc11a0ef427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffeec30eec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc11a0ef427 RDX: ffffffffffffffbc RSI: 00007fc11a14a00e RDI: 00007fc11a1491dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffeec30e940 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffeec30ef90 irq event stamp: 675 hardirqs last enabled at (675): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (674): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (670): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (668): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0c 24 or $0x24,%al 2: 89 f2 mov %esi,%edx 4: 89 fe mov %edi,%esi 6: bf 04 00 00 00 mov $0x4,%edi b: e9 da fe ff ff jmpq 0xfffffeea 10: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 17: 00 00 00 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 8b 0c 24 mov (%rsp),%rcx 32: 48 89 f2 mov %rsi,%rdx 35: 48 89 fe mov %rdi,%rsi 38: bf 06 00 00 00 mov $0x6,%edi 3d: e9 .byte 0xe9 3e: a8 fe test $0xfe,%al