Bluetooth: hci3: unexpected event 0x09 length: 225 > 3 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/6048 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.7/6048: #0: ffff88800f67c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880388bd9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f670950 (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: 6048 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260115 #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: 0033:0x7f7af9f1d427 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:00007fffd5e66748 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7af9f1d427 RDX: 00007fffd5e66823 RSI: 00007f7af9f7802f RDI: 00007fffd5e66810 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffd5e665e0 R10: 00007fffd5e66497 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fffd5e66810 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/6048 Modules linked in: CPU: 1 UID: 0 PID: 6048 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260115 #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:ffff88804c8279a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801fc70000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801fc703fc RBP: ffff88801fc70000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801fc70000 R13: 0000000000000001 R14: ffffffff85c0e190 R15: ffff8880183c58e0 FS: 000055558b451400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555572734708 CR3: 000000001e0e9000 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: 0033:0x7f7af9f1d427 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:00007fffd5e66748 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7af9f1d427 RDX: 00007fffd5e66823 RSI: 00007f7af9f7802f RDI: 00007fffd5e66810 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffd5e665e0 R10: 00007fffd5e66497 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fffd5e66810 irq event stamp: 389 hardirqs last enabled at (389): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (388): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (384): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (382): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- perf: interrupt took too long (3205 > 3142), lowering kernel.perf_event_max_sample_rate to 62000 perf: interrupt took too long (5075 > 5052), lowering kernel.perf_event_max_sample_rate to 39000 perf: interrupt took too long (6346 > 6343), lowering kernel.perf_event_max_sample_rate to 31000 ext4: Unknown parameter 'jouïðçyÿ+hAvpÔ;¿' ext4: Unknown parameter 'jouïðçyÿ+hAvpÔ;¿' perf: interrupt took too long (7953 > 7932), lowering kernel.perf_event_max_sample_rate to 25000 perf: interrupt took too long (9953 > 9941), lowering kernel.perf_event_max_sample_rate to 20000 loop4: detected capacity change from 0 to 63 Bluetooth: hci4: Ignoring connect complete event for invalid link type Bluetooth: hci4: SCO packet for unknown connection handle 200 Bluetooth: hci4: Ignoring connect complete event for invalid link type FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: hci4: Ignoring connect complete event for invalid link type Bluetooth: hci4: SCO packet for unknown connection handle 100 Bluetooth: hci4: Ignoring connect complete event for invalid link type Bluetooth: hci4: SCO packet for unknown connection handle 100 perf: interrupt took too long (12451 > 12441), lowering kernel.perf_event_max_sample_rate to 16000 Bluetooth: hci4: Ignoring connect complete event for invalid link type Bluetooth: hci4: Ignoring connect complete event for invalid link type