Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.0/4535 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.0/4535: #0: ffff88800fa703f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b6203e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa74950 (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: 4535 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc36e4ee427 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:00007fff44515228 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc36e4ee427 RDX: ffffffffffffffbc RSI: 00007fc36e54900e RDI: 00007fc36e5481dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff44514ca0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff445152f0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4535 Modules linked in: CPU: 1 UID: 0 PID: 4535 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88801f3f79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801f269b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801f269f7c RBP: ffff88801f269b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801f269b80 R13: 0000000000000001 R14: ffffffff85c0c6b0 R15: ffff88804b4ab2c0 FS: 00005555684de400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555684de708 CR3: 000000000a66d000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc36e4ee427 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:00007fff44515228 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc36e4ee427 RDX: ffffffffffffffbc RSI: 00007fc36e54900e RDI: 00007fc36e5481dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff44514ca0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff445152f0 irq event stamp: 665 hardirqs last enabled at (665): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (664): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (658): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (656): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400 Bluetooth: hci0: SCO packet for unknown connection handle 201 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 UID: 0 PID: 4554 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_to_user+0x32/0xd0 simple_read_from_buffer+0xe0/0x180 proc_fail_nth_read+0x18a/0x240 vfs_read+0x1eb/0xc70 ksys_read+0x121/0x240 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5d7529469c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f5d72857170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5d7529469c RDX: 000000000000000f RSI: 00007f5d728571e0 RDI: 0000000000000004 RBP: 00007f5d728571d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd0df3ab0f R14: 00007f5d72857300 R15: 0000000000022000 Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400 Bluetooth: hci0: SCO packet for unknown connection handle 201 Bluetooth: hci0: unexpected event 0x2f length: 763 > 260 Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400 Bluetooth: hci0: SCO packet for unknown connection handle 201 Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400 Bluetooth: hci0: SCO packet for unknown connection handle 201 nfs4: Unknown parameter 'obj_type' nfs4: Unknown parameter 'obj_type' Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400 Bluetooth: hci0: Unexpected cc 0xdc53 with no status Bluetooth: hci0: unexpected event for opcode 0x0400