===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.5/4341 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.5/4341: #0: ffff88800f73c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b79f640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6d8950 (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: 4341 Comm: syz-executor.5 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: 0033:0x7f2cc04a9427 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:00007ffd05eb09d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2cc04a9427 RDX: 00007ffd05eb0ab7 RSI: 00007f2cc0504019 RDI: 00007ffd05eb0aa0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd05eb0870 R10: 00007ffd05eb0727 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd05eb0aa0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4341 Modules linked in: CPU: 0 UID: 0 PID: 4341 Comm: syz-executor.5 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:ffff88804aff79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ada3700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801ada3afc RBP: ffff88801ada3700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ada3700 R13: 0000000000000001 R14: ffffffff85c0cfc0 R15: ffff88801b58cf58 FS: 000055557f123400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2cc0529545 CR3: 000000001ef09000 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: 0033:0x7f2cc04a9427 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:00007ffd05eb09d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2cc04a9427 RDX: 00007ffd05eb0ab7 RSI: 00007f2cc0504019 RDI: 00007ffd05eb0aa0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd05eb0870 R10: 00007ffd05eb0727 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd05eb0aa0 irq event stamp: 247 hardirqs last enabled at (247): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (246): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (242): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (240): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#1: syz-executor.5/4341 Modules linked in: CPU: 1 UID: 0 PID: 4341 Comm: syz-executor.5 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 RIP: 0010:rcu_exp_handler+0x12b/0x570 Code: 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 cb 03 00 00 0f b6 43 11 84 c0 75 b6 85 c9 74 1d 0f 8f bf 00 00 00 90 <0f> 0b 90 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6f ae 74 03 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 RSP: 0018:ffff88806cf085a0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806cf38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801ada3700 RDI: ffff88801ada3afc RBP: ffffffff85e310c0 R08: 0000000000000000 R09: fffffbfff0ccdc6a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806cf38811 R13: ffff88806cf38828 R14: ffffffff85e31138 R15: ffff88806cf38820 FS: 000055557f123400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa99ee03018 CR3: 000000001ef09000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0x5f/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x80 Code: 5c 03 48 c7 c0 f4 ff ff ff eb 92 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 68 54 38 06 65 8b 05 79 54 38 06 a9 00 01 ff 00 74 27 RSP: 0018:ffff88806cf08718 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffffff8667a450 RCX: ffffffff84c51bdf RDX: ffff88801ada3700 RSI: ffffffff84c51be9 RDI: 0000000000000006 RBP: ffffffff81372fb5 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81372fb5 R11: 0000000000000000 R12: ffffffff815d6d6f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4d9/0x5b0 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:ffff88806cf08970 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ada3700 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25d80 RDI: ffff88801ada3afc RBP: ffff88801ada3700 R08: ffffffff86a0fbf6 R09: ffffffff84e98ac0 R10: 000000000003d1db R11: 0000000000000003 R12: ffff88801ada3700 R13: ffff88806cf08a58 R14: ffff88804aff7f58 R15: ffff88806cf08a10 unwind_next_frame+0x3bc/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x43/0x70 kfree+0x149/0x5d0 slab_free_after_rcu_debug+0x6c/0x260 rcu_core+0x543/0x1b30 handle_softirqs+0x1b1/0x7d0 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x204/0x840 Code: e7 48 c7 03 00 00 00 00 e8 d9 aa 89 03 4d 85 f6 75 ba 49 8d 7c 24 48 e8 3a 8d 89 03 e8 45 1b 36 00 fb 65 48 8b 1d b4 f3 65 06 <48> 8d bb b8 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff88804aff77f8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88801ada3700 RCX: ffffffff817df7eb RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8147dc5b RBP: ffff88804aff7840 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e357 R11: 0000000000000000 R12: ffff88806cf379c0 R13: ffff8880166f0000 R14: ffff88806ce37a20 R15: 0000000000000000 __schedule+0xfb9/0x4680 preempt_schedule+0x4d/0x80 preempt_schedule_thunk+0x16/0x30 _raw_spin_unlock+0x32/0x40 __wait_on_freeing_inode+0x2e2/0x350 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: 0033:0x7f2cc04a9427 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:00007ffd05eb09d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2cc04a9427 RDX: 00007ffd05eb0ab7 RSI: 00007f2cc0504019 RDI: 00007ffd05eb0aa0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd05eb0870 R10: 00007ffd05eb0727 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd05eb0aa0 irq event stamp: 247 hardirqs last enabled at (247): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (246): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (242): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (240): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 10:aa:aa:aa:aa:aa Bluetooth: hci4: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: Frame is too long (len 125, expected len 4) Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: command 0x0406 tx timeout syz-executor.3 (4335) used greatest stack depth: 22896 bytes left Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 48 c7 c0 f4 ff ff ff mov $0xfffffffffffffff4,%rax 7: eb 92 jmp 0xffffff9b 9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: f3 0f 1e fa endbr64 24: 48 8b 34 24 mov (%rsp),%rsi * 28: 65 48 8b 15 68 54 38 mov %gs:0x6385468(%rip),%rdx # 0x6385498 <-- trapping instruction 2f: 06 30: 65 8b 05 79 54 38 06 mov %gs:0x6385479(%rip),%eax # 0x63854b0 37: a9 00 01 ff 00 test $0xff0100,%eax 3c: 74 27 je 0x65