===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.6/5781 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.6/5781: #0: ffff88800f6423f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c3ed9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f646950 (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: 5781 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_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: 0033:0x7f233f914427 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:00007ffe323551b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f233f914427 RDX: 00007ffe32355297 RSI: 00007f233f96f019 RDI: 00007ffe32355280 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe32355050 R10: 00007ffe32354f07 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe32355280 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/5781 Modules linked in: CPU: 0 UID: 0 PID: 5781 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: ffff88801af89b80 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88801af89f7c RBP: ffff88801af89b80 R08: ffffffff81893b1d R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 0000000000000242 R12: ffff88801af89b80 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 0000555555ebe400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f233f994546 CR3: 0000000019422000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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:__report_bug+0x4d9/0x5b0 Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 b0 00 00 00 48 63 2b 4c 89 e7 48 01 dd 48 89 ee e8 11 31 b0 fc 49 39 ec 74 22 e8 77 36 b0 fc <48> 83 c3 10 48 81 fb 20 8b 6c 86 72 b2 e8 65 36 b0 fc 4c 89 e7 e8 RSP: 0018:ffff88801ac87750 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffffff8667a9e0 RCX: ffffffff84c54bdf RDX: ffff88801af89b80 RSI: ffffffff84c54be9 RDI: 0000000000000006 RBP: ffffffff813747d6 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff813747d6 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b 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:ffff88801ac879a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801af89b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801af89f7c RBP: ffff88801af89b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801af89b80 R13: 0000000000000001 R14: ffffffff85c0f810 R15: ffff888049c10ca0 __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: 0033:0x7f233f914427 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:00007ffe323551b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f233f914427 RDX: 00007ffe32355297 RSI: 00007f233f96f019 RDI: 00007ffe32355280 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe32355050 R10: 00007ffe32354f07 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe32355280 irq event stamp: 175 hardirqs last enabled at (175): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (174): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (170): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (168): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- No source specified loop6: detected capacity change from 0 to 512 EXT4-fs warning (device loop6): ext4_multi_mount_protect:288: Invalid MMP block in superblock netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1400 audit(1768692637.594:15): avc: denied { map } for pid=5785 comm="syz-executor.2" path="pipe:[10210]" dev="pipefs" ino=10210 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout loop4: detected capacity change from 0 to 224 loop6: detected capacity change from 0 to 512 loop7: detected capacity change from 0 to 136 loop1: detected capacity change from 0 to 224 loop5: detected capacity change from 0 to 512 EXT4-fs warning (device loop6): ext4_multi_mount_protect:288: Invalid MMP block in superblock ISO 9660 Extensions: Microsoft Joliet Level 0 EXT4-fs warning (device loop5): ext4_multi_mount_protect:288: Invalid MMP block in superblock isofs_fill_super: get root inode failed isofs_fill_super: bread failed, dev=loop4, iso_blknum=56, block=112 ---------------- Code disassembly (best guess): 0: 83 c0 03 add $0x3,%eax 3: 38 d0 cmp %dl,%al 5: 7c 08 jl 0xf 7: 84 d2 test %dl,%dl 9: 0f 85 b0 00 00 00 jne 0xbf f: 48 63 2b movslq (%rbx),%rbp 12: 4c 89 e7 mov %r12,%rdi 15: 48 01 dd add %rbx,%rbp 18: 48 89 ee mov %rbp,%rsi 1b: e8 11 31 b0 fc callq 0xfcb03131 20: 49 39 ec cmp %rbp,%r12 23: 74 22 je 0x47 25: e8 77 36 b0 fc callq 0xfcb036a1 * 2a: 48 83 c3 10 add $0x10,%rbx <-- trapping instruction 2e: 48 81 fb 20 8b 6c 86 cmp $0xffffffff866c8b20,%rbx 35: 72 b2 jb 0xffffffe9 37: e8 65 36 b0 fc callq 0xfcb036a1 3c: 4c 89 e7 mov %r12,%rdi 3f: e8 .byte 0xe8