===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.6/5023 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.6/5023: #0: ffff88800f6c83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880496e3388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6cc950 (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: 5023 Comm: syz-executor.6 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_symlink+0x623/0xb40 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: 0033:0x7f3ca5981427 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:00007ffd17f153f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3ca5981427 RDX: ffffffffffffffbc RSI: 00007f3ca59dc00e RDI: 00007f3ca59db1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd17f14e70 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd17f154c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/5023 Modules linked in: CPU: 0 UID: 0 PID: 5023 Comm: syz-executor.6 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:ffff88800ed579a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888019045280 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801904567c RBP: ffff888019045280 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888019045280 R13: 0000000000000001 R14: ffffffff85c0dc40 R15: ffff88804ac7ebf0 FS: 0000555561802400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cd23000 CR3: 000000001ee38000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 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: 0033:0x7f3ca5981427 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:00007ffd17f153f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3ca5981427 RDX: ffffffffffffffbc RSI: 00007f3ca59dc00e RDI: 00007f3ca59db1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd17f14e70 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd17f154c0 irq event stamp: 1377 hardirqs last enabled at (1377): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1376): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1372): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1370): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:823 at rcu_sched_clock_irq+0x1431/0x2e50, CPU#0: syz-executor.1/281 Modules linked in: CPU: 0 UID: 0 PID: 281 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_sched_clock_irq+0x1431/0x2e50 Code: d1 f4 ff ff e8 20 dd 55 00 e9 12 f2 ff ff 48 c7 c7 b4 ed 66 86 e8 6f dd 55 00 e9 07 ef ff ff e8 c5 a9 c2 ff e9 1e f6 ff ff 90 <0f> 0b 90 e9 fa ee ff ff f3 48 0f bc c0 89 c3 83 f8 3f 0f 86 a3 fa RSP: 0018:ffff88806ce08b68 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: 0000000000000000 RCX: ffffffff815dd8af RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800f6bbafc RBP: ffff88800f6bb700 R08: 0000000000000000 R09: fffffbfff0ccdc6a R10: ffffffff8666e357 R11: 0000000000000000 R12: ffff88800f6bb700 R13: 0000000000000000 R14: ffffffff8666edb4 R15: dffffc0000000000 FS: 0000555586bd6400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9fefffd004 CR3: 000000001c50a000 CR4: 0000000000350ef0 Call Trace: update_process_times+0xf2/0x210 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:finish_wait+0x14/0x230 Code: ff ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 <41> 54 49 89 fc 55 65 48 8b 2d 56 46 5e 06 53 48 8d bd 08 15 00 00 RSP: 0018:ffff88800f4879f0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11001e90f2a RDX: 0000000000000000 RSI: ffff88800f487a48 RDI: ffffffff85c0da60 RBP: ffff88800f487a48 R08: 0000000000000000 R09: fffffbfff0ccdc6a R10: ffffffff8666e357 R11: 0000000000000000 R12: 1ffff11001e90f42 R13: 0000000000000001 R14: ffffffff85c0da60 R15: ffff888049767578 __wait_on_freeing_inode+0x2f2/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efd6d139c27 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:00007ffd89ba28f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd89ba2980 RCX: 00007efd6d139c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd89ba2980 RBP: 00007ffd89ba295c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd89ba2696 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000022fde R14: 0000000000000002 R15: 00007ffd89ba29c0 irq event stamp: 473806 hardirqs last enabled at (473805): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (473806): [] __schedule+0x192d/0x4680 softirqs last enabled at (473616): [] fpu_clone+0x157/0x5f0 softirqs last disabled at (473614): [] fpu_clone+0xe3/0x5f0 ---[ end trace 0000000000000000 ]--- netlink: 40 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. syz-executor.6 (5191): /proc/5191/oom_adj is deprecated, please use /proc/5191/oom_score_adj instead. sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 process 'syz-executor.0' launched './file1' with NULL argv: empty string added sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 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 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 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: hci3: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci3: command tx timeout Bluetooth: hci3: command tx timeout ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: f3 0f 1e fa endbr64 17: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1e: fc ff df 21: 41 57 push %r15 23: 41 56 push %r14 25: 41 55 push %r13 * 27: 41 54 push %r12 <-- trapping instruction 29: 49 89 fc mov %rdi,%r12 2c: 55 push %rbp 2d: 65 48 8b 2d 56 46 5e mov %gs:0x65e4656(%rip),%rbp # 0x65e468b 34: 06 35: 53 push %rbx 36: 48 8d bd 08 15 00 00 lea 0x1508(%rbp),%rdi