===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.3/282 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.3/282: #0: ffff88800f8c03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b226cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8c4950 (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: 282 Comm: syz-executor.3 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: 0033:0x7f468e52dc27 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:00007ffc58d40a68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc58d40af0 RCX: 00007f468e52dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc58d40af0 RBP: 00007ffc58d40acc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc58d40806 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002fec0 R14: 0000000000000011 R15: 00007ffc58d40b30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/282 Modules linked in: CPU: 1 UID: 0 PID: 282 Comm: syz-executor.3 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_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:ffff88801c1ff9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801c0b5280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801c0b567c RBP: ffff88801c0b5280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801c0b5280 R13: 0000000000000001 R14: ffffffff85c10850 R15: ffff88801b379fb0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#1: syz-executor.3/282 Modules linked in: CPU: 1 UID: 0 PID: 282 Comm: syz-executor.3 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:ffff88806cf08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806cf38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801c0b5280 RDI: ffff88801c0b567c RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: ffff88806cf08ff8 R12: ffff88806cf38811 R13: ffff88806cf38828 R14: ffffffff85e31378 R15: ffff88806cf38820 FS: 000055557b975400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e5addf2f28 CR3: 0000000014337000 CR4: 0000000000350ef0 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:vprintk_store+0x17f/0xa30 Code: e8 d6 f6 1f 00 41 80 fd 03 0f 86 ce 00 00 00 e8 07 fc 1f 00 48 89 ee 31 ff 45 31 ff e8 4a f7 1f 00 48 85 ed 0f 85 6c 04 00 00 ec fb 1f 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7 RSP: 0018:ffff88801c1ff390 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88806cf244a5 RCX: ffffffff817dfeab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81558ae5 RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e857 R11: 0000000000000001 R12: 0000000000000041 R13: 0000000000000002 R14: ffffffff85d49d78 R15: 0000000000000041 vprintk_emit+0x13c/0x680 _printk+0xbe/0xf0 __show_regs+0x2d2/0x750 show_regs+0x33/0x60 __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 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:ffff88801c1ff9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801c0b5280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801c0b567c RBP: ffff88801c0b5280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801c0b5280 R13: 0000000000000001 R14: ffffffff85c10850 R15: ffff88801b379fb0 __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: 0033:0x7f468e52dc27 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:00007ffc58d40a68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc58d40af0 RCX: 00007f468e52dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc58d40af0 RBP: 00007ffc58d40acc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc58d40806 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002fec0 R14: 0000000000000011 R15: 00007ffc58d40b30 irq event stamp: 238495 hardirqs last enabled at (238495): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (238494): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (238490): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (238488): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FS: 000055557b975400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e5addf2f28 CR3: 0000000014337000 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: 0033:0x7f468e52dc27 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:00007ffc58d40a68 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc58d40af0 RCX: 00007f468e52dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc58d40af0 RBP: 00007ffc58d40acc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc58d40806 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002fec0 R14: 0000000000000011 R15: 00007ffc58d40b30 irq event stamp: 238495 hardirqs last enabled at (238495): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (238494): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (238490): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (238488): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop6: detected capacity change from 0 to 2048 ext4: Unknown parameter '¬4' syz-executor.5 (4273) used greatest stack depth: 23608 bytes left ---------------- Code disassembly (best guess): 0: e8 d6 f6 1f 00 callq 0x1ff6db 5: 41 80 fd 03 cmp $0x3,%r13b 9: 0f 86 ce 00 00 00 jbe 0xdd f: e8 07 fc 1f 00 callq 0x1ffc1b 14: 48 89 ee mov %rbp,%rsi 17: 31 ff xor %edi,%edi 19: 45 31 ff xor %r15d,%r15d 1c: e8 4a f7 1f 00 callq 0x1ff76b 21: 48 85 ed test %rbp,%rbp 24: 0f 85 6c 04 00 00 jne 0x496 * 2a: e8 ec fb 1f 00 callq 0x1ffc1b <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 48 03 44 24 10 add 0x10(%rsp),%rax 3e: 48 rex.W 3f: c7 .byte 0xc7