process 'syz-executor.3' launched './file1' with NULL argv: empty string added EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 512 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.4/282 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.4/282: #0: ffff88800f75a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bcef640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f75e950 (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: 282 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260116 #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 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4579bd2c27 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:00007ffe85f83de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe85f83e70 RCX: 00007f4579bd2c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe85f83e70 RBP: 00007ffe85f83e4c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffe85f83b87 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000243eb R14: 0000000000000004 R15: 00007ffe85f83eb0 ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.4/282 Modules linked in: CPU: 0 UID: 0 PID: 282 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260116 #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 6f d7 74 03 RSP: 0018:ffff88806ce08600 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801622b700 RDI: ffff88801622bafc RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31378 R15: ffff88806ce38820 FS: 000055558c5a0400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cc3e000 CR3: 000000000d6eb000 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+0x4b8/0x5b0 Code: c7 c3 c0 79 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 84 d2 <0f> 85 b0 00 00 00 48 63 2b 4c 89 e7 48 01 dd 48 89 ee e8 11 31 b0 RSP: 0018:ffff88806ce08770 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffffffff8667ff10 RCX: ffffffff84c54bdf RDX: 0000000000000000 RSI: ffffffff84c54bad RDI: 0000000000000006 RBP: ffffffff84ceccd7 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff84ceccd7 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: ffff88801622b700 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8135f8c2 RDI: ffff88801622bafc RBP: ffff88801622b700 R08: 0000000000000001 R09: ffff88806ce08aa0 R10: 000000000003d20b R11: 00000000000250af R12: ffff88801622b700 R13: ffff88806ce08aa8 R14: ffff88806ce08dd8 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: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 da dc 1f 00 e8 d5 58 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 08 2b RSP: 0018:ffff88801b02f418 EFLAGS: 00000246 RAX: ffffffff86155b78 RBX: 0000000000000001 RCX: ffffffff817dfeab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8155a58b RBP: ffff88801b02f578 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e857 R11: 000000002d2d2d2d R12: 0000000000000200 R13: ffffffff86155b20 R14: 0000000000000000 R15: dffffc0000000000 __console_flush_and_unlock+0xb1/0x1d0 vprintk_emit+0x4b5/0x680 _printk+0xbe/0xf0 __report_bug+0x322/0x5b0 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 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:ffff88801b02f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801622b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801622bafc RBP: ffff88801622b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801622b700 R13: 0000000000000001 R14: ffffffff85c0d290 R15: ffff888049cdd8e0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4579bd2c27 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:00007ffe85f83de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe85f83e70 RCX: 00007f4579bd2c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe85f83e70 RBP: 00007ffe85f83e4c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffe85f83b87 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000243eb R14: 0000000000000004 R15: 00007ffe85f83eb0 irq event stamp: 180431 hardirqs last enabled at (180431): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (180430): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (180426): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (180424): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/282 Modules linked in: CPU: 0 UID: 0 PID: 282 Comm: syz-executor.4 Tainted: G W 6.19.0-rc5-next-20260116 #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_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:ffff88801b02f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801622b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801622bafc RBP: ffff88801622b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801622b700 R13: 0000000000000001 R14: ffffffff85c0d290 R15: ffff888049cdd8e0 FS: 000055558c5a0400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cc3e000 CR3: 000000000d6eb000 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 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4579bd2c27 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:00007ffe85f83de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe85f83e70 RCX: 00007f4579bd2c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe85f83e70 RBP: 00007ffe85f83e4c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffe85f83b87 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000243eb R14: 0000000000000004 R15: 00007ffe85f83eb0 irq event stamp: 180431 hardirqs last enabled at (180431): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (180430): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (180426): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (180424): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci1: Opcode 0x0c1a failed: -110 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci1: command 0x0c1a tx timeout ---------------- Code disassembly (best guess): 0: c7 c3 c0 79 67 86 mov $0x866779c0,%ebx 6: 75 3e jne 0x46 8: eb 5e jmp 0x68 a: e8 b3 36 b0 fc callq 0xfcb036c2 f: 48 89 d8 mov %rbx,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx 1b: 48 89 d8 mov %rbx,%rax 1e: 83 e0 07 and $0x7,%eax 21: 83 c0 03 add $0x3,%eax 24: 38 d0 cmp %dl,%al 26: 7c 08 jl 0x30 28: 84 d2 test %dl,%dl * 2a: 0f 85 b0 00 00 00 jne 0xe0 <-- trapping instruction 30: 48 63 2b movslq (%rbx),%rbp 33: 4c 89 e7 mov %r12,%rdi 36: 48 01 dd add %rbx,%rbp 39: 48 89 ee mov %rbp,%rsi 3c: e8 .byte 0xe8 3d: 11 31 adc %esi,(%rcx) 3f: b0 .byte 0xb0