===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.6/288 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.6/288: #0: ffff88800f7363f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bdd2a00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f742950 (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: 288 Comm: syz-executor.6 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a4dcfdc27 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 53 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:00007fff1fbc9c68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff1fbc9cf0 RCX: 00007f2a4dcfdc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff1fbc9cf0 RBP: 00007fff1fbc9ccc R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff1fbc9a06 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000003b494 R14: 000000000000000e R15: 00007fff1fbc9d30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/288 Modules linked in: CPU: 1 UID: 0 PID: 288 Comm: syz-executor.6 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:ffff88801913f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b9e8000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801b9e83fc RBP: ffff88801b9e8000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b9e8000 R13: 0000000000000001 R14: ffffffff85c11070 R15: ffff88801bc16268 FS: 000055556fe5f400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d45f5a718 CR3: 000000000bc18000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 loop4: detected capacity change from 0 to 256 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#1: syz-executor.6/288 Modules linked in: CPU: 1 UID: 0 PID: 288 Comm: syz-executor.6 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_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:ffff88806cf08740 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806cf38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801b9e8000 RDI: ffff88801b9e83fc RBP: ffffffff85e31080 R08: 0000000000000000 R09: fffffbfff0ccdd6a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806cf38811 R13: ffff88806cf38828 R14: ffffffff85e310f8 R15: ffff88806cf38820 FS: 000055556fe5f400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d45f5a718 CR3: 000000000bc18000 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:handle_bug+0x209/0x4f0 Code: 83 db ff 0f 1f 44 00 00 90 4c 8b ad 90 00 00 00 31 ff 41 81 e5 00 02 00 00 4c 89 ee 0f 1f 44 00 00 4d 85 ed 0f 85 3d 01 00 00 <0f> 1f 44 00 00 48 63 fb 48 c7 c6 60 2a e2 84 0f 1f 44 00 00 81 fb RSP: 0018:ffff88806cf088b0 EFLAGS: 00000206 RAX: ffff88806cf08918 RBX: 000000000000fffe RCX: ffffffff810016ca RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff88806cf08918 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d780f R13: 0000000000000200 R14: 0000000000000002 R15: 000000000000000b 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 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:ffff88806cf089c0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b9e8000 RCX: 000000000000000d RDX: 0000000000000000 RSI: ffffffff85e25d40 RDI: ffff88801b9e83fc RBP: ffff88801b9e8000 R08: ffffffff84e98ac0 R09: ffff88806cf08aa0 R10: 000000000003d1bb R11: 0000000000031bc8 R12: ffff88801b9e8000 R13: ffff88806cf08aa8 R14: ffff88801913fcb0 R15: ffff88806cf08a60 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/0x660 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:console_flush_one_record+0x900/0xb70 Code: 8b 04 24 48 c1 e8 03 42 80 3c 38 00 0f 85 53 02 00 00 4d 89 65 58 e9 41 ff ff ff e8 6a d8 1f 00 e8 e5 57 28 00 fb 48 8b 04 24 <48> c1 e8 03 42 80 3c 38 00 0f 84 1f ff ff ff 48 8b 3c 24 e8 f8 55 RSP: 0018:ffff88801913f2e0 EFLAGS: 00000246 RAX: ffffffff86155e98 RBX: 0000000000000001 RCX: ffffffff817e018b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8155a95b RBP: ffff88801913f440 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666eb57 R11: 64203a34706f6f6c R12: 0000000000000200 R13: ffffffff86155e40 R14: 0000000000000000 R15: dffffc0000000000 __console_flush_and_unlock+0xb1/0x1d0 vprintk_emit+0x4b5/0x680 _printk+0xbe/0xf0 __show_trace_log_lvl+0x204/0x380 __warn+0xfc/0x370 __report_bug+0x421/0x5b0 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 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:ffff88801913f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b9e8000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801b9e83fc RBP: ffff88801b9e8000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b9e8000 R13: 0000000000000001 R14: ffffffff85c11070 R15: ffff88801bc16268 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a4dcfdc27 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 53 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:00007fff1fbc9c68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff1fbc9cf0 RCX: 00007f2a4dcfdc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff1fbc9cf0 RBP: 00007fff1fbc9ccc R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff1fbc9a06 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000003b494 R14: 000000000000000e R15: 00007fff1fbc9d30 irq event stamp: 318221 hardirqs last enabled at (318221): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (318220): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (318216): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (318214): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a4dcfdc27 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 53 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:00007fff1fbc9c68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff1fbc9cf0 RCX: 00007f2a4dcfdc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff1fbc9cf0 RBP: 00007fff1fbc9ccc R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff1fbc9a06 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000003b494 R14: 000000000000000e R15: 00007fff1fbc9d30 irq event stamp: 318221 hardirqs last enabled at (318221): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (318220): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (318216): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (318214): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 83 db ff sbb $0xffffffff,%ebx 3: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 8: 90 nop 9: 4c 8b ad 90 00 00 00 mov 0x90(%rbp),%r13 10: 31 ff xor %edi,%edi 12: 41 81 e5 00 02 00 00 and $0x200,%r13d 19: 4c 89 ee mov %r13,%rsi 1c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 21: 4d 85 ed test %r13,%r13 24: 0f 85 3d 01 00 00 jne 0x167 * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 63 fb movslq %ebx,%rdi 32: 48 c7 c6 60 2a e2 84 mov $0xffffffff84e22a60,%rsi 39: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3e: 81 .byte 0x81 3f: fb sti