===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.6/4468 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.6/4468: #0: ffff88800f8ba3f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff888049dca078 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f8be950 (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: 4468 Comm: syz-executor.6 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_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: 0033:0x7fc659c72b19 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:00007fc6571e8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fc659d85f60 RCX: 00007fc659c72b19 RDX: 0000000000000000 RSI: 0000000000000155 RDI: 00000000200003c0 RBP: 00007fc659cccf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdce34315f R14: 00007fc6571e8300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/4468 Modules linked in: CPU: 0 UID: 0 PID: 4468 Comm: syz-executor.6 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88800a7e1b80 RCX: ffffffff81893bc4 RDX: 0000000000000000 RSI: ffffffff81893bdb RDI: ffff88800a7e1f7c RBP: ffff88800a7e1b80 R08: ffffffff81893b1d R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000308 R12: ffff88800a7e1b80 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 00007fc6571e8700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002200 CR3: 0000000048e8d000 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:__sanitizer_cov_trace_pc+0x67/0x80 Code: c0 75 05 e9 1b 3f 5c 03 8b 82 b8 14 00 00 83 f8 02 75 f0 48 8b 8a c0 14 00 00 8b 92 bc 14 00 00 48 8b 01 48 83 c0 01 48 39 c2 <76> d7 48 89 01 48 89 34 c1 e9 eb 3e 5c 03 66 66 2e 0f 1f 84 00 00 RSP: 0018:ffff8880488af2b8 EFLAGS: 00000216 RAX: 0000000000024328 RBX: ffffffff86681fc0 RCX: ffffc90006cc0000 RDX: 0000000000040000 RSI: ffffffff84c54be9 RDI: 0000000000000006 RBP: ffffffff8158ce3a R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8158ce3a R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4d9/0x5b0 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:ffff8880488af510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800a7e1b80 RCX: ffffc90006cc0000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800a7e1f7c RBP: ffff88800a7e1b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800a7e1b80 R13: 0000000000000001 R14: ffffffff85c0d920 R15: ffff88801ad96bf0 __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: 0033:0x7fc659c72b19 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:00007fc6571e8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fc659d85f60 RCX: 00007fc659c72b19 RDX: 0000000000000000 RSI: 0000000000000155 RDI: 00000000200003c0 RBP: 00007fc659cccf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdce34315f R14: 00007fc6571e8300 R15: 0000000000022000 irq event stamp: 209 hardirqs last enabled at (209): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (208): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (202): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (200): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 5 FAT-fs (loop7): Directory bread(block 5) failed FAT-fs (loop7): Directory bread(block 6) failed loop6: detected capacity change from 0 to 64 loop3: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess): 0: c0 75 05 e9 shlb $0xe9,0x5(%rbp) 4: 1b 3f sbb (%rdi),%edi 6: 5c pop %rsp 7: 03 8b 82 b8 14 00 add 0x14b882(%rbx),%ecx d: 00 83 f8 02 75 f0 add %al,-0xf8afd08(%rbx) 13: 48 8b 8a c0 14 00 00 mov 0x14c0(%rdx),%rcx 1a: 8b 92 bc 14 00 00 mov 0x14bc(%rdx),%edx 20: 48 8b 01 mov (%rcx),%rax 23: 48 83 c0 01 add $0x1,%rax 27: 48 39 c2 cmp %rax,%rdx * 2a: 76 d7 jbe 0x3 <-- trapping instruction 2c: 48 89 01 mov %rax,(%rcx) 2f: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 33: e9 eb 3e 5c 03 jmpq 0x35c3f23 38: 66 data16 39: 66 data16 3a: 2e cs 3b: 0f .byte 0xf 3c: 1f (bad) 3d: 84 00 test %al,(%rax)