===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.4/4558 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.4/4558: #0: ffff88800f98e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049d8bd10 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f96a950 (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: 4558 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f851c6cb427 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:00007ffee5150df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f851c6cb427 RDX: 00007ffee5150ed7 RSI: 00007f851c726019 RDI: 00007ffee5150ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffee5150c90 R10: 00007ffee5150b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffee5150ec0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/4558 Modules linked in: CPU: 0 UID: 0 PID: 4558 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88806ce08b18 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888013e69b80 RCX: ffffffff81894e55 RDX: 0000000000000000 RSI: ffffffff81894e70 RDI: ffff888013e69f7c RBP: ffff888013e69b80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff888013e69b80 R13: 0000000000000000 R14: ffff88806ce21458 R15: dffffc0000000000 FS: 0000555594b5c400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f851c74b544 CR3: 000000004c023000 CR4: 0000000000350ef0 Call Trace: perf_event_update_userpage+0x4da/0x800 x86_pmu_del+0x476/0x6d0 event_sched_out+0x380/0xbf0 group_sched_out.part.0+0xff/0x310 __pmu_ctx_sched_out+0x4ab/0x6f0 perf_mux_hrtimer_handler+0x5d7/0xad0 __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+0x4a0/0x5b0 Code: 00 00 fc ff df 48 81 c3 c0 7a 67 86 48 89 de e8 56 31 b0 fc 49 39 dc 48 c7 c3 c0 7a 67 86 75 3e eb 5e e8 b3 36 b0 fc 48 89 d8 <48> c1 e8 03 42 0f b6 14 28 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 RSP: 0018:ffff88804bb7f750 EFLAGS: 00000293 RAX: ffffffff8667d1b0 RBX: ffffffff8667d1b0 RCX: ffffffff84c54bdf RDX: ffff888013e69b80 RSI: ffffffff84c54bad RDI: 0000000000000006 RBP: ffffffff8148176f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8148176f R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b 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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88804bb7f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888013e69b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888013e69f7c RBP: ffff888013e69b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888013e69b80 R13: 0000000000000001 R14: ffffffff85c0dec0 R15: ffff888049f23c48 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f851c6cb427 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:00007ffee5150df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f851c6cb427 RDX: 00007ffee5150ed7 RSI: 00007f851c726019 RDI: 00007ffee5150ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffee5150c90 R10: 00007ffee5150b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffee5150ec0 irq event stamp: 207 hardirqs last enabled at (207): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (206): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (202): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (200): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- tmpfs: Unknown parameter 'nr_i5C}rBBnڝ# 5ï4Tt;'tr{o#DZ!5WL} #' ---------------- Code disassembly (best guess), 4 bytes skipped: 0: df 48 81 fisttps -0x7f(%rax) 3: c3 retq 4: c0 7a 67 86 sarb $0x86,0x67(%rdx) 8: 48 89 de mov %rbx,%rsi b: e8 56 31 b0 fc callq 0xfcb03166 10: 49 39 dc cmp %rbx,%r12 13: 48 c7 c3 c0 7a 67 86 mov $0xffffffff86677ac0,%rbx 1a: 75 3e jne 0x5a 1c: eb 5e jmp 0x7c 1e: e8 b3 36 b0 fc callq 0xfcb036d6 23: 48 89 d8 mov %rbx,%rax * 26: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2a: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx 2f: 48 89 d8 mov %rbx,%rax 32: 83 e0 07 and $0x7,%eax 35: 83 c0 03 add $0x3,%eax 38: 38 d0 cmp %dl,%al 3a: 7c 08 jl 0x44