===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.1/5518 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.1/5518: #0: ffff88800f8d03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804ec86cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8d4950 (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: 5518 Comm: syz-executor.1 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: 0033:0x7f29cf272427 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:00007ffc404e1038 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f29cf272427 RDX: 00007ffc404e1113 RSI: 00007f29cf2cd022 RDI: 00007ffc404e1100 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc404e0ed0 R10: 00007ffc404e0d87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc404e1100 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/5518 Modules linked in: CPU: 0 UID: 0 PID: 5518 Comm: syz-executor.1 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:ffff8880465579a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801e03d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801e03d67c RBP: ffff88801e03d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801e03d280 R13: 0000000000000001 R14: ffffffff85c105d0 R15: ffff88804eeccf58 FS: 0000555573c49400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555573c49708 CR3: 000000004b782000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f29cf272427 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:00007ffc404e1038 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f29cf272427 RDX: 00007ffc404e1113 RSI: 00007f29cf2cd022 RDI: 00007ffc404e1100 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc404e0ed0 R10: 00007ffc404e0d87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc404e1100 irq event stamp: 863 hardirqs last enabled at (863): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (861): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (862): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (851): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.1/5518 Modules linked in: CPU: 0 UID: 0 PID: 5518 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260115 #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 d7 74 03 RSP: 0018:ffff88806ce08600 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801e03d280 RDI: ffff88801e03d67c RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd2a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31378 R15: ffff88806ce38820 FS: 0000555573c49400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ce2f000 CR3: 000000004b782000 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:__report_bug+0x4cf/0x5b0 Code: 0f b6 14 28 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b0 00 00 00 48 63 2b 4c 89 e7 48 01 dd 48 89 ee e8 11 31 b0 fc <49> 39 ec 74 22 e8 77 36 b0 fc 48 83 c3 10 48 81 fb 20 8c 6c 86 72 RSP: 0018:ffff88806ce08770 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8667ca70 RCX: ffffffff84c54bdf RDX: ffff88801e03d280 RSI: ffffffff815d742f RDI: 0000000000000006 RBP: ffffffff81445862 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81445862 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:ffff88806ce089c0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801e03d280 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88801e03d67c RBP: ffff88801e03d280 R08: 0000000000000001 R09: ffffffff84e98ac0 R10: 000000000003d20b R11: 0000000000028057 R12: ffff88801e03d280 R13: ffff88806ce08aa8 R14: ffff888046557ee0 R15: ffff88806ce08a60 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 kmem_cache_free+0x2cd/0x670 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 19 dc 89 03 4d 85 f6 75 ba 49 8d 7c 24 48 e8 9a be 89 03 e8 85 23 36 00 fb 65 48 8b 1d 34 05 66 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:ffff8880465577f8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88801e03d280 RCX: ffffffff817dfeab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8147dadb RBP: ffff888046557840 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e957 R11: 0000000000000000 R12: ffff88806ce379c0 R13: ffff8880193a3700 R14: ffff88806ce37a20 R15: ffff88801e03d768 __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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f29cf272427 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:00007ffc404e1038 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f29cf272427 RDX: 00007ffc404e1113 RSI: 00007f29cf2cd022 RDI: 00007ffc404e1100 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc404e0ed0 R10: 00007ffc404e0d87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc404e1100 irq event stamp: 863 hardirqs last enabled at (863): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (861): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (862): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (851): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0f b6 14 28 movzbl (%rax,%rbp,1),%edx 4: 48 89 d8 mov %rbx,%rax 7: 83 e0 07 and $0x7,%eax a: 83 c0 03 add $0x3,%eax d: 38 d0 cmp %dl,%al f: 7c 08 jl 0x19 11: 84 d2 test %dl,%dl 13: 0f 85 b0 00 00 00 jne 0xc9 19: 48 63 2b movslq (%rbx),%rbp 1c: 4c 89 e7 mov %r12,%rdi 1f: 48 01 dd add %rbx,%rbp 22: 48 89 ee mov %rbp,%rsi 25: e8 11 31 b0 fc callq 0xfcb0313b * 2a: 49 39 ec cmp %rbp,%r12 <-- trapping instruction 2d: 74 22 je 0x51 2f: e8 77 36 b0 fc callq 0xfcb036ab 34: 48 83 c3 10 add $0x10,%rbx 38: 48 81 fb 20 8c 6c 86 cmp $0xffffffff866c8c20,%rbx 3f: 72 .byte 0x72