===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.0/4630 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.0/4630: #0: ffff88800a2323f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880498cc698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a236950 (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: 0 UID: 0 PID: 4630 Comm: syz-executor.0 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: 0033:0x7f240d13e427 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:00007ffdfac83948 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f240d13e427 RDX: 00007ffdfac83a23 RSI: 00007f240d199022 RDI: 00007ffdfac83a10 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdfac837e0 R10: 00007ffdfac83697 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffdfac83a10 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/4630 Modules linked in: CPU: 0 UID: 0 PID: 4630 Comm: syz-executor.0 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888016289b80 RCX: ffffffff81893bc4 RDX: 0000000000000000 RSI: ffffffff81893bdb RDI: ffff888016289f7c RBP: ffff888016289b80 R08: ffffffff81893b1d R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000004d R12: ffff888016289b80 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 00005555897a7400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f95ced51000 CR3: 0000000047ec1000 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:is_valid_bugaddr+0x47/0x90 Code: 48 89 df 45 31 e4 e8 d8 9a 4b 00 48 39 eb 72 46 e8 3e a0 4b 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 01 38 d0 7c 04 84 d2 75 2c 0f b7 1b bf 0f RSP: 0018:ffff88804a927730 EFLAGS: 00000213 RAX: dffffc0000000000 RBX: ffffffff815d742f RCX: ffffffff8129e218 RDX: 0000000000000000 RSI: ffffffff8129e222 RDI: 0000000000000006 RBP: 00007ffffffff000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffffffff000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88804a9278f8 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x37d/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:ffff88804a9279a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016289b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888016289f7c RBP: ffff888016289b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016289b80 R13: 0000000000000001 R14: ffffffff85c0f860 R15: ffff8880498ff578 __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: 0033:0x7f240d13e427 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:00007ffdfac83948 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f240d13e427 RDX: 00007ffdfac83a23 RSI: 00007f240d199022 RDI: 00007ffdfac83a10 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdfac837e0 R10: 00007ffdfac83697 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffdfac83a10 irq event stamp: 771 hardirqs last enabled at (771): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (770): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (764): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (762): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) No source specified loop4: detected capacity change from 0 to 64 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Read attributes 8c 6a 0e 56 7f e0 14 67 cb 03 45 31 loop7: detected capacity change from 0 to 64 loop4: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) No source specified FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) mac80211_hwsim hwsim7 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode loop4: detected capacity change from 0 to 64 mac80211_hwsim hwsim7 wlan1: entered promiscuous mode FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) No source specified mac80211_hwsim hwsim7 wlan1: left promiscuous mode ---------------- Code disassembly (best guess): 0: 48 89 df mov %rbx,%rdi 3: 45 31 e4 xor %r12d,%r12d 6: e8 d8 9a 4b 00 callq 0x4b9ae3 b: 48 39 eb cmp %rbp,%rbx e: 72 46 jb 0x56 10: e8 3e a0 4b 00 callq 0x4ba053 15: 48 89 da mov %rbx,%rdx 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 01 add $0x1,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 2c jne 0x67 3b: 0f b7 1b movzwl (%rbx),%ebx 3e: bf .byte 0xbf 3f: 0f .byte 0xf