===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/4020 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.1/4020: #0: ffff88800f8d83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b717640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8dc950 (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: 4020 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: 0033:0x7fe8ee50ec27 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:00007fe8eba84fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe8ee50ec27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fe8eba85040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007fe8eba85000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/4020 Modules linked in: CPU: 1 UID: 0 PID: 4020 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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88801a7b9b80 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88801a7b9f7c RBP: ffff88801a7b9b80 R08: 0000000000000000 R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 00000000000002c0 R12: ffff88801a7b9b80 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 00007fe8eba85700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe8eba84fe8 CR3: 000000001d198000 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+0x60/0x80 Code: 8b 82 dc 14 00 00 85 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 RSP: 0018:ffff888049bbf788 EFLAGS: 00000246 RAX: 000000000001a8ea RBX: ffffffff86679b00 RCX: ffffc90002407000 RDX: 0000000000040000 RSI: ffffffff84c54bad RDI: 0000000000000006 RBP: ffffffff812f9cf3 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff812f9cf3 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x49d/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:ffff888049bbf9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a7b9b80 RCX: ffffc90002407000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801a7b9f7c RBP: ffff88801a7b9b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a7b9b80 R13: 0000000000000001 R14: ffffffff85c0fef0 R15: ffff88801b70cf58 __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: 0033:0x7fe8ee50ec27 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:00007fe8eba84fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe8ee50ec27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fe8eba85040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007fe8eba85000 R15: 0000000000000000 irq event stamp: 87 hardirqs last enabled at (87): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (86): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (80): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (78): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 2048 ext4: Unknown parameter '$y®BÀ†º&' loop0: detected capacity change from 0 to 13 loop0: detected capacity change from 0 to 13 syz-executor.1 uses obsolete (PF_INET,SOCK_PACKET) audit: type=1400 audit(1768697958.063:10): avc: denied { write } for pid=4081 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop2: detected capacity change from 0 to 4 EXT4-fs (loop2): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop2): invalid inodes per group: 536870944 9p: Could not find request transport: tcp000000000000 loop2: detected capacity change from 0 to 4 EXT4-fs (loop2): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop2): invalid inodes per group: 536870944 audit: type=1107 audit(1768697958.393:11): pid=4113 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='D' audit: type=1107 audit(1768697958.395:12): pid=4113 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='D' 9p: Could not find request transport: tcp000000000000 ---------------- Code disassembly (best guess): 0: 8b 82 dc 14 00 00 mov 0x14dc(%rdx),%eax 6: 85 c0 test %eax,%eax 8: 75 05 jne 0xf a: e9 1b 3f 5c 03 jmpq 0x35c3f2a f: 8b 82 b8 14 00 00 mov 0x14b8(%rdx),%eax 15: 83 f8 02 cmp $0x2,%eax 18: 75 f0 jne 0xa 1a: 48 8b 8a c0 14 00 00 mov 0x14c0(%rdx),%rcx 21: 8b 92 bc 14 00 00 mov 0x14bc(%rdx),%edx 27: 48 8b 01 mov (%rcx),%rax * 2a: 48 83 c0 01 add $0x1,%rax <-- trapping instruction 2e: 48 39 c2 cmp %rax,%rdx 31: 76 d7 jbe 0xa 33: 48 89 01 mov %rax,(%rcx) 36: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 3a: e9 eb 3e 5c 03 jmpq 0x35c3f2a 3f: 66 data16