===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.6/4730 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.6/4730: #0: ffff88800f5723f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff88801c7af640 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f576950 (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: 4730 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_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f209e744b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f209bcba188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f209e857f60 RCX: 00007f209e744b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f209e79ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1f1145bf R14: 00007f209bcba300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/4730 Modules linked in: CPU: 1 UID: 0 PID: 4730 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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888049751b80 RCX: ffffffff81893b34 RDX: 0000000000000000 RSI: ffffffff81893b4b RDI: ffff888049751f7c RBP: ffff888049751b80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888049751b80 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 00007f209bcba700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f209e858018 CR3: 000000001f5be000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 tick_nohz_handler+0x4ff/0x8c0 __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+0x49d/0x5b0 Code: 00 00 00 00 00 fc ff df 48 81 c3 c0 7c 67 86 48 89 de e8 b6 80 b0 fc 49 39 dc 48 c7 c3 c0 7c 67 86 75 3e eb 5e e8 13 86 b0 fc <48> 89 d8 48 c1 e8 03 42 0f b6 14 28 48 89 d8 83 e0 07 83 c0 03 38 RSP: 0018:ffff88801ec9f2c0 EFLAGS: 00000212 RAX: 00000000000237a8 RBX: ffffffff8667a440 RCX: ffffc9000bc5f000 RDX: 0000000000040000 RSI: ffffffff84c4fbad RDI: 0000000000000006 RBP: ffffffff813339ef R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff813339ef R11: 0000000000000000 R12: ffffffff815d780f 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 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:ffff88801ec9f510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049751b80 RCX: ffffc9000bc5f000 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888049751f7c RBP: ffff888049751b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049751b80 R13: 0000000000000001 R14: ffffffff85c0ef00 R15: ffff88801c534f58 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f209e744b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f209bcba188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f209e857f60 RCX: 00007f209e744b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f209e79ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1f1145bf R14: 00007f209bcba300 R15: 0000000000022000 irq event stamp: 75 hardirqs last enabled at (75): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (74): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (70): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (68): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop0: detected capacity change from 0 to 6 FAT-fs (loop0): Directory bread(block 6) failed loop5: detected capacity change from 0 to 6 FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed loop3: detected capacity change from 0 to 6 FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop3): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed Bluetooth: hci3: Unexpected cc 0xdc53 with no status Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: unexpected event 0x2f length: 763 > 260 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci3: Injecting HCI hardware error event Bluetooth: hci3: hardware error 0x00 Bluetooth: hci3: Opcode 0x0c03 failed: -110 loop0: detected capacity change from 0 to 6 loop6: detected capacity change from 0 to 6 loop4: detected capacity change from 0 to 6 loop2: detected capacity change from 0 to 16382 FAT-fs (loop4): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop2: detected capacity change from 0 to 256 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop4): Directory bread(block 6) failed FAT-fs (loop4): Directory bread(block 6) failed SELinux: security_context_str_to_sid (system_u) failed with errno=-22 loop2: detected capacity change from 0 to 16382 FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed loop5: detected capacity change from 0 to 6 loop7: detected capacity change from 0 to 6 loop3: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop3): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed loop4: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed EXT4-fs (loop2): #blocks per group too big: 8448 FAT-fs (loop4): Directory bread(block 6) failed EXT4-fs (loop1): VFS: Can't find ext4 filesystem EXT4-fs (loop2): #blocks per group too big: 8448 FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop7): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop4): Directory bread(block 6) failed ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 81 fisttps -0x7f(%rax) 3: c3 retq 4: c0 7c 67 86 48 sarb $0x48,-0x7a(%rdi,%riz,2) 9: 89 de mov %ebx,%esi b: e8 b6 80 b0 fc callq 0xfcb080c6 10: 49 39 dc cmp %rbx,%r12 13: 48 c7 c3 c0 7c 67 86 mov $0xffffffff86677cc0,%rbx 1a: 75 3e jne 0x5a 1c: eb 5e jmp 0x7c 1e: e8 13 86 b0 fc callq 0xfcb08636 * 23: 48 89 d8 mov %rbx,%rax <-- trapping instruction 26: 48 c1 e8 03 shr $0x3,%rax 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 .byte 0x38