===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/4108 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.4/4108: #0: ffff88800fb1e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049a24698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fd02950 (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: 4108 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7f2eea427 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:00007ffcd3b0bc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd7f2eea427 RDX: ffffffffffffffbc RSI: 00007fd7f2f4500e RDI: 00007fd7f2f441dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcd3b0b6b0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcd3b0bd00 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4108 Modules linked in: CPU: 1 UID: 0 PID: 4108 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88800b78b700 RCX: ffffffff81893b34 RDX: 0000000000000000 RSI: ffffffff81893b4b RDI: ffff88800b78bafc RBP: ffff88800b78b700 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88800b78b700 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 000055557b43b400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557b43b708 CR3: 000000004d837000 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:__report_bug+0x49d/0x5b0 Code: 00 00 00 00 00 fc ff df 48 81 c3 c0 7c 67 86 48 89 de e8 b6 80 b0 fc 49 39 dc 48 c7 c3 c0 7c 67 86 75 3e eb 5e e8 13 86 b0 fc <48> 89 d8 48 c1 e8 03 42 0f b6 14 28 48 89 d8 83 e0 07 83 c0 03 38 RSP: 0018:ffff888051067750 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffffff8667c410 RCX: ffffffff84c4fbdf RDX: ffff88800b78b700 RSI: ffffffff84c4fbad RDI: 0000000000000006 RBP: ffffffff814244da R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff814244da R11: 0000000000000000 R12: ffffffff815d780f 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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff8880510679a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800b78b700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88800b78bafc RBP: ffff88800b78b700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800b78b700 R13: 0000000000000001 R14: ffffffff85c0f400 R15: ffff888049821628 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7f2eea427 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:00007ffcd3b0bc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd7f2eea427 RDX: ffffffffffffffbc RSI: 00007fd7f2f4500e RDI: 00007fd7f2f441dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcd3b0b6b0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcd3b0bd00 irq event stamp: 623 hardirqs last enabled at (623): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (622): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (618): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (616): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list process 'syz-executor.5' launched './file1' with NULL argv: empty string added UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) loop1: detected capacity change from 0 to 4 Bluetooth: Unexpected continuation frame (len 12) Bluetooth: Unexpected continuation frame (len 12) SELinux: security_context_str_to_sid (root,errors=continue) failed with errno=-22 SELinux: security_context_str_to_sid (root,errors=continue) failed with errno=-22 SELinux: security_context_str_to_sid (root,errors=continue) failed with errno=-22 SELinux: security_context_str_to_sid (root,errors=continue) failed with errno=-22 SELinux: security_context_str_to_sid (root,errors=continue) failed with errno=-22 Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. audit: type=1400 audit(1768294608.328:11): avc: denied { block_suspend } for pid=4558 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 loop2: detected capacity change from 0 to 264192 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 syz-executor.7 uses obsolete (PF_INET,SOCK_PACKET) tmpfs: Unknown parameter './file0' UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 cgroup: subsys name conflicts with all cgroup: subsys name conflicts with all cgroup: subsys name conflicts with all cgroup: subsys name conflicts with all cgroup: subsys name conflicts with all program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 81 fisttps -0x7f(%rax) 3: c3 retq 4: c0 7c 67 86 48 sarb $0x48,-0x7a(%rdi,%riz,2) 9: 89 de mov %ebx,%esi b: e8 b6 80 b0 fc callq 0xfcb080c6 10: 49 39 dc cmp %rbx,%r12 13: 48 c7 c3 c0 7c 67 86 mov $0xffffffff86677cc0,%rbx 1a: 75 3e jne 0x5a 1c: eb 5e jmp 0x7c 1e: e8 13 86 b0 fc callq 0xfcb08636 * 23: 48 89 d8 mov %rbx,%rax <-- trapping instruction 26: 48 c1 e8 03 shr $0x3,%rax 2a: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx 2f: 48 89 d8 mov %rbx,%rax 32: 83 e0 07 and $0x7,%eax 35: 83 c0 03 add $0x3,%eax 38: 38 .byte 0x38