===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.6/296 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.6/296: #0: ffff88800f75c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bdc8d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f740950 (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: 296 Comm: syz-executor.6 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f37bf2ffc27 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 53 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:00007ffd927469d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd92746a60 RCX: 00007f37bf2ffc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd92746a60 RBP: 00007ffd92746a3c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd92746776 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000044067 R14: 000000000000000a R15: 00007ffd92746aa0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/296 Modules linked in: CPU: 0 UID: 0 PID: 296 Comm: syz-executor.6 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_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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888013ea8000 RCX: ffffffff81893504 RDX: 0000000000000000 RSI: ffffffff8189351b RDI: ffff888013ea83fc RBP: ffff888013ea8000 R08: ffffffff8189345d R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff888013ea8000 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 00005555645d3400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555798e6c18 CR3: 000000001e614000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 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:__report_bug+0x4a9/0x5b0 Code: 74 67 86 48 89 de e8 96 5a b0 fc 49 39 dc 48 c7 c3 c0 74 67 86 75 3e eb 5e e8 f3 5f b0 fc 48 89 d8 48 c1 e8 03 42 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 RSP: 0018:ffff88800a28f790 EFLAGS: 00000216 RAX: 1ffffffff0cceec0 RBX: ffffffff86677600 RCX: ffffffff84c51bdf RDX: 0000000000000000 RSI: ffffffff84c51bad RDI: 0000000000000006 RBP: ffffffff84ce2ddf R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff84ce2ddf 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:ffff88800a28f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888013ea8000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888013ea83fc RBP: ffff888013ea8000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888013ea8000 R13: 0000000000000001 R14: ffffffff85c0d150 R15: ffff88801bc932c0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f37bf2ffc27 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 53 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:00007ffd927469d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd92746a60 RCX: 00007f37bf2ffc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd92746a60 RBP: 00007ffd92746a3c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd92746776 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000044067 R14: 000000000000000a R15: 00007ffd92746aa0 irq event stamp: 283493 hardirqs last enabled at (283493): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (283492): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (283488): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (283486): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout ---------------- Code disassembly (best guess): 0: 74 67 je 0x69 2: 86 48 89 xchg %cl,-0x77(%rax) 5: de e8 fsubrp %st,%st(0) 7: 96 xchg %eax,%esi 8: 5a pop %rdx 9: b0 fc mov $0xfc,%al b: 49 39 dc cmp %rbx,%r12 e: 48 c7 c3 c0 74 67 86 mov $0xffffffff866774c0,%rbx 15: 75 3e jne 0x55 17: eb 5e jmp 0x77 19: e8 f3 5f b0 fc callq 0xfcb06011 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 08 jl 0x3f 37: 84 d2 test %dl,%dl 39: 0f 85 b0 00 00 00 jne 0xef 3f: 48 rex.W