===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/4393 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.4/4393: #0: ffff88800fb943f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88800bc06330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a570950 (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: 4393 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: 0033:0x7faa7cf5d427 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:00007ffe46902df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa7cf5d427 RDX: 00007ffe46902ed7 RSI: 00007faa7cfb8019 RDI: 00007ffe46902ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe46902c90 R10: 00007ffe46902b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe46902ec0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/4393 Modules linked in: CPU: 0 UID: 0 PID: 4393 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88802032b700 RCX: ffffffff81893504 RDX: 0000000000000000 RSI: ffffffff8189351b RDI: ffff88802032bafc RBP: ffff88802032b700 R08: ffffffff8189345d R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff88802032b700 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 000055559110e400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d4dfdc6b8 CR3: 0000000049650000 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+0x4/0x120 Code: eb a2 48 89 ef e8 ac a4 ee fc e9 0f ff ff ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <41> 55 49 89 f5 41 54 49 89 fc 53 e8 cc 56 b0 fc 65 ff 05 55 ab e8 RSP: 0018:ffff88801af1f888 EFLAGS: 00000246 RAX: ffff88801af1f8f8 RBX: 000000000000fffe RCX: ffffffff810016ca RDX: 0000000000000000 RSI: ffff88801af1f8f8 RDI: ffffffff815d6d6f RBP: ffff88801af1f8f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d6d6f R13: 0000000000000200 R14: 0000000000000002 R15: 000000000000000b 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:ffff88801af1f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88802032b700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88802032bafc RBP: ffff88802032b700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802032b700 R13: 0000000000000001 R14: ffffffff85c0c7f0 R15: ffff88800bf3b2c0 __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: 0033:0x7faa7cf5d427 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:00007ffe46902df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa7cf5d427 RDX: 00007ffe46902ed7 RSI: 00007faa7cfb8019 RDI: 00007ffe46902ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe46902c90 R10: 00007ffe46902b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe46902ec0 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 ]--- loop2: detected capacity change from 0 to 64 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 64 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 64 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess): 0: eb a2 jmp 0xffffffa4 2: 48 89 ef mov %rbp,%rdi 5: e8 ac a4 ee fc callq 0xfceea4b6 a: e9 0f ff ff ff jmpq 0xffffff1e f: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 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: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 0f 1f 40 d6 nopl -0x2a(%rax) * 2a: 41 55 push %r13 <-- trapping instruction 2c: 49 89 f5 mov %rsi,%r13 2f: 41 54 push %r12 31: 49 89 fc mov %rdi,%r12 34: 53 push %rbx 35: e8 cc 56 b0 fc callq 0xfcb05706 3a: 65 gs 3b: ff .byte 0xff 3c: 05 .byte 0x5 3d: 55 push %rbp 3e: ab stos %eax,%es:(%rdi) 3f: e8 .byte 0xe8