===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/280 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.1/280: #0: ffff88800f8383f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bd2ecb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f83c950 (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: 280 Comm: syz-executor.1 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: 0033:0x7f963fe34c27 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:00007fff6b2ef698 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff6b2ef720 RCX: 00007f963fe34c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff6b2ef720 RBP: 00007fff6b2ef6fc R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff6b2ef436 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000005d4ff R14: 0000000000000006 R15: 00007fff6b2ef760 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/280 Modules linked in: CPU: 1 UID: 0 PID: 280 Comm: syz-executor.1 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:ffff88806cf08c10 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88800f5d9b80 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8149c08f RDI: ffff88800f5d9f7c RBP: ffff88800f5d9b80 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e857 R11: ffff888019939be8 R12: ffff88800f5d9b80 R13: 0000000000000008 R14: 0000000000000001 R15: ffff888019939b80 FS: 000055556e33b400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f965d7b0543 CR3: 000000000daa0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: select_task_rq_fair+0x489/0x3d40 try_to_wake_up+0x51b/0x1680 hrtimer_wakeup+0x47/0x60 __hrtimer_run_queues+0x1ee/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+0x4d9/0x5b0 Code: 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 fc 49 39 ec 74 22 e8 77 36 b0 fc <48> 83 c3 10 48 81 fb 20 8b 6c 86 72 b2 e8 65 36 b0 fc 4c 89 e7 e8 RSP: 0018:ffff88801b6c7790 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffffff86682e20 RCX: ffffffff84c54bdf RDX: ffff88800f5d9b80 RSI: ffffffff84c54be9 RDI: 0000000000000006 RBP: ffffffff815c9fbc R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815c9fbc 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:ffff88801b6c79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f5d9b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800f5d9f7c RBP: ffff88800f5d9b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f5d9b80 R13: 0000000000000001 R14: ffffffff85c0f450 R15: ffff88804a96ebf0 __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: 0033:0x7f963fe34c27 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:00007fff6b2ef698 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff6b2ef720 RCX: 00007f963fe34c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff6b2ef720 RBP: 00007fff6b2ef6fc R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff6b2ef436 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000005d4ff R14: 0000000000000006 R15: 00007fff6b2ef760 irq event stamp: 349925 hardirqs last enabled at (349925): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (349924): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (349920): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (349918): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- SELinux: unrecognized netlink message: protocol=0 nlmsg_type=57 sclass=netlink_route_socket pid=6519 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=53 sclass=netlink_route_socket pid=6519 comm=syz-executor.3 loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! loop3: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 ---------------- Code disassembly (best guess): 0: 83 c0 03 add $0x3,%eax 3: 38 d0 cmp %dl,%al 5: 7c 08 jl 0xf 7: 84 d2 test %dl,%dl 9: 0f 85 b0 00 00 00 jne 0xbf f: 48 63 2b movslq (%rbx),%rbp 12: 4c 89 e7 mov %r12,%rdi 15: 48 01 dd add %rbx,%rbp 18: 48 89 ee mov %rbp,%rsi 1b: e8 11 31 b0 fc callq 0xfcb03131 20: 49 39 ec cmp %rbp,%r12 23: 74 22 je 0x47 25: e8 77 36 b0 fc callq 0xfcb036a1 * 2a: 48 83 c3 10 add $0x10,%rbx <-- trapping instruction 2e: 48 81 fb 20 8b 6c 86 cmp $0xffffffff866c8b20,%rbx 35: 72 b2 jb 0xffffffe9 37: e8 65 36 b0 fc callq 0xfcb036a1 3c: 4c 89 e7 mov %r12,%rdi 3f: e8 .byte 0xe8