===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.1/4555 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.1/4555: #0: ffff88800f6263f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804eaa4698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f62a950 (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: 4555 Comm: syz-executor.1 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: 0033:0x7f5594ca7427 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:00007ffc4bd35488 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5594ca7427 RDX: ffffffffffffffbc RSI: 00007f5594d0200e RDI: 00007f5594d011dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc4bd34f00 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc4bd35550 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/4555 Modules linked in: CPU: 1 UID: 0 PID: 4555 Comm: syz-executor.1 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:ffff888050bf79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804f2a1b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804f2a1f7c RBP: ffff88804f2a1b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804f2a1b80 R13: 0000000000000001 R14: ffffffff85c0e460 R15: ffff88804e9d9628 FS: 000055555a4c7400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555a4c7708 CR3: 000000000bd8c000 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: 0033:0x7f5594ca7427 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:00007ffc4bd35488 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5594ca7427 RDX: ffffffffffffffbc RSI: 00007f5594d0200e RDI: 00007f5594d011dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc4bd34f00 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc4bd35550 irq event stamp: 625 hardirqs last enabled at (625): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (624): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (620): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (618): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.1/4555 Modules linked in: CPU: 0 UID: 0 PID: 4555 Comm: syz-executor.1 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 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 4f 83 74 03 RSP: 0018:ffff88806ce08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88804f2a1b80 RDI: ffff88804f2a1f7c RBP: ffffffff85e31080 R08: 0000000000000000 R09: fffffbfff0ccdd6a R10: 0000000000000001 R11: ffff88806ce08ff8 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e310f8 R15: ffff88806ce38820 FS: 000055555a4c7400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4dd105f2e0 CR3: 000000000bd8c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0xa1/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x204/0x840 Code: e7 48 c7 03 00 00 00 00 e8 d9 80 89 03 4d 85 f6 75 ba 49 8d 7c 24 48 e8 4a 63 89 03 e8 65 1b 36 00 fb 65 48 8b 1d 34 fa 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:ffff888050bf77f8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88804f2a1b80 RCX: ffffffff817e018b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8147e5db RBP: ffff888050bf7840 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666eb57 R11: 0000000000000000 R12: ffff88806ce379c0 R13: ffff88800a821b80 R14: ffff88806cf37a20 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+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: 0033:0x7f5594ca7427 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:00007ffc4bd35488 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5594ca7427 RDX: ffffffffffffffbc RSI: 00007f5594d0200e RDI: 00007f5594d011dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc4bd34f00 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc4bd35550 irq event stamp: 625 hardirqs last enabled at (625): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (624): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (620): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (618): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e7 48 out %eax,$0x48 2: c7 03 00 00 00 00 movl $0x0,(%rbx) 8: e8 d9 80 89 03 callq 0x38980e6 d: 4d 85 f6 test %r14,%r14 10: 75 ba jne 0xffffffcc 12: 49 8d 7c 24 48 lea 0x48(%r12),%rdi 17: e8 4a 63 89 03 callq 0x3896366 1c: e8 65 1b 36 00 callq 0x361b86 21: fb sti 22: 65 48 8b 1d 34 fa 65 mov %gs:0x665fa34(%rip),%rbx # 0x665fa5e 29: 06 * 2a: 48 8d bb b8 14 00 00 lea 0x14b8(%rbx),%rdi <-- trapping instruction 31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 38: fc ff df 3b: 48 89 fa mov %rdi,%rdx 3e: 48 rex.W 3f: c1 .byte 0xc1