===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.2/6188 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.2/6188: #0: ffff88800f6be3f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff888014643388 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f8c2950 (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: 6188 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260114 #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: 0033:0x7f4ef8177b19 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:00007f4ef56ed188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4ef828af60 RCX: 00007f4ef8177b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f4ef81d1f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef28f59bf R14: 00007f4ef56ed300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/6188 Modules linked in: CPU: 0 UID: 0 PID: 6188 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88801f2ab700 RCX: ffffffff81893504 RDX: 0000000000000000 RSI: ffffffff8189351b RDI: ffff88801f2abafc RBP: ffff88801f2ab700 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff88801f2ab700 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 00007f4ef56ed700(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4ef81c95e8 CR3: 000000005436f000 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_cmp8+0x8/0x20 Code: 00 00 00 e9 da fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <48> 89 f2 48 89 fe bf 06 00 00 00 e9 a8 fe ff ff 0f 1f 84 00 00 00 RSP: 0018:ffff88804c1df2b8 EFLAGS: 00000287 RAX: 0000000000000003 RBX: ffffffff86680160 RCX: ffffffff84c51bdf RDX: 0000000000000000 RSI: ffffffff8152be99 RDI: ffffffff815d6d6f RBP: ffffffff8152be99 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8152be81 R11: 0000000000000000 R12: ffffffff815d6d6f 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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88804c1df510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801f2ab700 RCX: ffffc9000b059000 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801f2abafc RBP: ffff88801f2ab700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801f2ab700 R13: 0000000000000001 R14: ffffffff85c0f4a0 R15: ffff88801468e268 __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: 0033:0x7f4ef8177b19 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:00007f4ef56ed188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4ef828af60 RCX: 00007f4ef8177b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f4ef81d1f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef28f59bf R14: 00007f4ef56ed300 R15: 0000000000022000 irq event stamp: 1463 hardirqs last enabled at (1463): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1462): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1458): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1456): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1326 audit(1768421467.598:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6133 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9212ccfb19 code=0x0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: e9 da fe ff ff jmpq 0xfffffee1 7: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) e: 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: f3 0f 1e fa endbr64 25: 48 8b 0c 24 mov (%rsp),%rcx * 29: 48 89 f2 mov %rsi,%rdx <-- trapping instruction 2c: 48 89 fe mov %rdi,%rsi 2f: bf 06 00 00 00 mov $0x6,%edi 34: e9 a8 fe ff ff jmpq 0xfffffee1 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax)