EXT4-fs warning (device sda): __ext4_ioctl:1554: Setting inode version is not supported with metadata_csum enabled. EXT4-fs warning (device sda): __ext4_ioctl:1554: Setting inode version is not supported with metadata_csum enabled. ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.4/285 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.4/285: #0: ffff88800f6fa3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c873388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6fe950 (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: 285 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: 0033:0x7f88a99d6c27 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:00007ffd9c1788e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd9c178970 RCX: 00007f88a99d6c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd9c178970 RBP: 00007ffd9c17894c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd9c178686 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002e6d9 R14: 000000000000000a R15: 00007ffd9c1789b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/285 Modules linked in: CPU: 1 UID: 0 PID: 285 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_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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888017178000 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff8880171783fc RBP: ffff888017178000 R08: 0000000000000000 R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 0000000000000112 R12: ffff888017178000 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 0000555582ec7400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555e58fc58 CR3: 000000000ea2e000 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:write_comp_data+0x17/0xa0 Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 65 8b 05 76 64 38 06 65 48 8b 15 56 64 38 06 a9 00 01 ff 00 <74> 27 f6 c4 01 74 1d a9 00 00 0f 00 75 16 a9 00 00 f0 00 74 05 e9 RSP: 0018:ffff88800f69f788 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff86677a50 RCX: ffffffff84c54bdf RDX: ffff888017178000 RSI: ffffffff815d742f RDI: 0000000000000006 RBP: ffffffff86ff2e60 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff86ff2e60 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/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:ffff88800f69f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888017178000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880171783fc RBP: ffff888017178000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017178000 R13: 0000000000000001 R14: ffffffff85c0e320 R15: ffff88801c8a4f58 __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: 0033:0x7f88a99d6c27 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:00007ffd9c1788e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd9c178970 RCX: 00007f88a99d6c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd9c178970 RBP: 00007ffd9c17894c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd9c178686 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002e6d9 R14: 000000000000000a R15: 00007ffd9c1789b0 irq event stamp: 206527 hardirqs last enabled at (206527): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (206526): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (206520): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (206518): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs warning (device loop5): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop5: detected capacity change from 0 to 2048 EXT4-fs warning (device loop5): ext4_multi_mount_protect:288: Invalid MMP block in superblock ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 90 90 90 90 90 add %dl,-0x6f6f6f70(%rax) 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 49 89 d2 mov %rdx,%r10 16: 65 8b 05 76 64 38 06 mov %gs:0x6386476(%rip),%eax # 0x6386493 1d: 65 48 8b 15 56 64 38 mov %gs:0x6386456(%rip),%rdx # 0x638647b 24: 06 25: a9 00 01 ff 00 test $0xff0100,%eax * 2a: 74 27 je 0x53 <-- trapping instruction 2c: f6 c4 01 test $0x1,%ah 2f: 74 1d je 0x4e 31: a9 00 00 0f 00 test $0xf0000,%eax 36: 75 16 jne 0x4e 38: a9 00 00 f0 00 test $0xf00000,%eax 3d: 74 05 je 0x44 3f: e9 .byte 0xe9