===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.3/6754 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.3/6754: #0: ffff88800f8203f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b5e3d10 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f824950 (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: 6754 Comm: syz-executor.3 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: 0033:0x7f8c05aab427 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:00007fff9e99bf58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8c05aab427 RDX: 00007fff9e99c033 RSI: 00007f8c05b06022 RDI: 00007fff9e99c020 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff9e99bdf0 R10: 00007fff9e99bca7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff9e99c020 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/6754 Modules linked in: CPU: 0 UID: 0 PID: 6754 Comm: syz-executor.3 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 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:ffff88804f8579a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888037833700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888037833afc RBP: ffff888037833700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888037833700 R13: 0000000000000001 R14: ffffffff85c0f810 R15: ffff888048cd45d0 FS: 0000555563a58400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff9e99c020 CR3: 000000004f89e000 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: 0033:0x7f8c05aab427 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:00007fff9e99bf58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8c05aab427 RDX: 00007fff9e99c033 RSI: 00007f8c05b06022 RDI: 00007fff9e99c020 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff9e99bdf0 R10: 00007fff9e99bca7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff9e99c020 irq event stamp: 301 hardirqs last enabled at (301): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (300): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (296): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (294): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:823 at rcu_sched_clock_irq+0x1431/0x2e50, CPU#0: syz-executor.3/6754 Modules linked in: CPU: 0 UID: 0 PID: 6754 Comm: syz-executor.3 Tainted: G W 6.19.0-rc5-next-20260116 #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_sched_clock_irq+0x1431/0x2e50 Code: d1 f4 ff ff e8 90 dd 55 00 e9 12 f2 ff ff 48 c7 c7 b4 f2 66 86 e8 df dd 55 00 e9 07 ef ff ff e8 95 a2 c2 ff e9 1e f6 ff ff 90 <0f> 0b 90 e9 fa ee ff ff f3 48 0f bc c0 89 c3 83 f8 3f 0f 86 a3 fa RSP: 0018:ffff88806ce08b68 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: 0000000000000000 RCX: ffffffff815ddf6f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888037833afc RBP: ffff888037833700 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: ffffffff8666e857 R11: 0000000000000000 R12: ffff888037833700 R13: 0000000000000000 R14: ffffffff8666f2b4 R15: dffffc0000000000 FS: 0000555563a58400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fee7c58bfc8 CR3: 000000004f89e000 CR4: 0000000000350ef0 Call Trace: update_process_times+0xf2/0x210 tick_nohz_handler+0x4ff/0x8c0 __hrtimer_run_queues+0x654/0xbb0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x300 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:schedule+0x29d/0x390 Code: d9 00 00 00 f6 43 19 10 0f 85 d9 00 00 00 48 8d bd c0 11 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 cd 00 00 00 48 8b bd c0 11 00 00 48 85 ff 74 0a be 01 00 00 RSP: 0018:ffff88804f8579a8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888037833700 RCX: ffffffff84cfcc9d RDX: 1ffff11006f06918 RSI: 0000000000000000 RDI: ffff8880378348c0 RBP: ffff888037833700 R08: ffffffff84cfcc9d R09: 0000000000000001 R10: ffffffff85c16883 R11: 0000000000000001 R12: ffff88803783372c R13: 0000000000000001 R14: ffffffff85c0f810 R15: ffff888048cd45d0 __wait_on_freeing_inode+0x2e7/0x350 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: 0033:0x7f8c05aab427 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:00007fff9e99bf58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8c05aab427 RDX: 00007fff9e99c033 RSI: 00007f8c05b06022 RDI: 00007fff9e99c020 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff9e99bdf0 R10: 00007fff9e99bca7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff9e99c020 irq event stamp: 301 hardirqs last enabled at (301): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (300): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (296): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (294): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci8: command 0x0406 tx timeout ---------------- Code disassembly (best guess): 0: d9 00 flds (%rax) 2: 00 00 add %al,(%rax) 4: f6 43 19 10 testb $0x10,0x19(%rbx) 8: 0f 85 d9 00 00 00 jne 0xe7 e: 48 8d bd c0 11 00 00 lea 0x11c0(%rbp),%rdi 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 cd 00 00 00 jne 0xfd <-- trapping instruction 30: 48 8b bd c0 11 00 00 mov 0x11c0(%rbp),%rdi 37: 48 85 ff test %rdi,%rdi 3a: 74 0a je 0x46 3c: be .byte 0xbe 3d: 01 00 add %eax,(%rax)