===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.2/5761 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.2/5761: #0: ffff88800f9e43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803d81aa00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fdc8950 (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: 5761 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260115 #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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc843da5427 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 58 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:00007ffcba929f08 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc843da5427 RDX: 00007ffcba929fe7 RSI: 00007fc843e00019 RDI: 00007ffcba929fd0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcba929da0 R10: 00007ffcba929c57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcba929fd0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/5761 Modules linked in: CPU: 1 UID: 0 PID: 5761 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260115 #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: ffff88801595b700 RCX: ffffffff81893bc4 RDX: 0000000000000000 RSI: ffffffff81893bdb RDI: ffff88801595bafc RBP: ffff88801595b700 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000021e R12: ffff88801595b700 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 000055556ae37400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc843e00019 CR3: 000000000e107000 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+0x12/0xa0 Code: 03 0f 1f 80 00 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 00 01 ff 00 74 27 f6 c4 01 74 1d a9 00 00 0f 00 75 16 a9 00 00 RSP: 0018:ffff88804efbf748 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff866835e0 RCX: ffffffff84c5489d RDX: ffff88801595b700 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffffff84e9a9e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d742f R13: 0000000000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x18d/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:ffff88804efbf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801595b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801595bafc RBP: ffff88801595b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801595b700 R13: 0000000000000001 R14: ffffffff85c10c10 R15: ffff88803d909628 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc843da5427 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 58 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:00007ffcba929f08 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc843da5427 RDX: 00007ffcba929fe7 RSI: 00007fc843e00019 RDI: 00007ffcba929fd0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcba929da0 R10: 00007ffcba929c57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcba929fd0 irq event stamp: 215 hardirqs last enabled at (215): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (214): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (208): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (206): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 7: 90 nop 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: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 49 89 d2 mov %rdx,%r10 1a: 65 8b 05 76 64 38 06 mov %gs:0x6386476(%rip),%eax # 0x6386497 21: 65 48 8b 15 56 64 38 mov %gs:0x6386456(%rip),%rdx # 0x638647f 28: 06 * 29: a9 00 01 ff 00 test $0xff0100,%eax <-- trapping instruction 2e: 74 27 je 0x57 30: f6 c4 01 test $0x1,%ah 33: 74 1d je 0x52 35: a9 00 00 0f 00 test $0xf0000,%eax 3a: 75 16 jne 0x52 3c: a9 .byte 0xa9