===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/4061 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.4/4061: #0: ffff88800f84c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049a02078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a130950 (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: 4061 Comm: syz-executor.4 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_symlink+0x623/0xb40 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: 0033:0x7f121beaf427 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:00007ffea351a288 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f121beaf427 RDX: 00007ffea351a363 RSI: 00007f121bf0a02f RDI: 00007ffea351a350 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffea351a120 R10: 00007ffea3519fd7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffea351a350 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4061 Modules linked in: CPU: 1 UID: 0 PID: 4061 Comm: syz-executor.4 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:ffff88804a88f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a4e3700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804a4e3afc RBP: ffff88804a4e3700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a4e3700 R13: 0000000000000001 R14: ffffffff85c10d00 R15: ffff88804999c5d0 FS: 0000555576609400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d021000 CR3: 000000000a879000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f121beaf427 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:00007ffea351a288 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f121beaf427 RDX: 00007ffea351a363 RSI: 00007f121bf0a02f RDI: 00007ffea351a350 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffea351a120 R10: 00007ffea3519fd7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffea351a350 irq event stamp: 507 hardirqs last enabled at (507): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (506): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (502): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (500): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.1 uses obsolete (PF_INET,SOCK_PACKET) process 'syz-executor.2' launched './file1' with NULL argv: empty string added netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop5: detected capacity change from 0 to 6 Bluetooth: hci1: unexpected event 0x13 length: 431 > 260 Bluetooth: hci1: Malformed Event: 0x13 Bluetooth: hci1: unexpected event 0x13 length: 431 > 260 Bluetooth: hci1: Malformed Event: 0x13 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd netlink: 'syz-executor.4': attribute type 11 has an invalid length. netlink: 'syz-executor.4': attribute type 11 has an invalid length. netlink: 'syz-executor.4': attribute type 11 has an invalid length. Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x01 length: 430 > 18 Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x01 length: 430 > 18 debugfs: '0' already exists in 'hci5' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci5/hci5:0' CPU: 0 UID: 0 PID: 290 Comm: kworker/u11:0 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci5 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x1246/0x1e40 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x65b/0x8b0 process_one_work+0x8e1/0x1960 worker_thread+0x67e/0xe90 kthread+0x385/0x490 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 kobject: kobject_add_internal failed for hci5:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci5: failed to register connection device netlink: 'syz-executor.4': attribute type 11 has an invalid length. Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x01 length: 430 > 18 debugfs: '0' already exists in 'hci5' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci5/hci5:0' CPU: 0 UID: 0 PID: 290 Comm: kworker/u11:0 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci5 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x1246/0x1e40 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x65b/0x8b0 process_one_work+0x8e1/0x1960 worker_thread+0x67e/0xe90 kthread+0x385/0x490 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 kobject: kobject_add_internal failed for hci5:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci5: failed to register connection device Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x01 length: 430 > 18 debugfs: '0' already exists in 'hci5' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci5/hci5:0' CPU: 0 UID: 0 PID: 290 Comm: kworker/u11:0 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci5 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x1246/0x1e40 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x65b/0x8b0 process_one_work+0x8e1/0x1960 worker_thread+0x67e/0xe90 kthread+0x385/0x490 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 netlink: 'syz-executor.4': attribute type 11 has an invalid length. kobject: kobject_add_internal failed for hci5:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci5: failed to register connection device Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x01 length: 430 > 18 debugfs: '0' already exists in 'hci5' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci5/hci5:0' CPU: 0 UID: 0 PID: 290 Comm: kworker/u11:0 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci5 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x1246/0x1e40 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x65b/0x8b0 process_one_work+0x8e1/0x1960 worker_thread+0x67e/0xe90 kthread+0x385/0x490 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 kobject: kobject_add_internal failed for hci5:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci5: failed to register connection device Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout