EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. iso9660: Unknown parameter 'ÿ' ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.5/4064 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.5/4064: #0: ffff88800f7863f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff88804a482a00 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f92a950 (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: 4064 Comm: syz-executor.5 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_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: 0033:0x7f47fceafb19 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:00007f47fa425188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f47fcfc2f60 RCX: 00007f47fceafb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f47fcf09f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4e13340f R14: 00007f47fa425300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.5/4064 Modules linked in: CPU: 1 UID: 0 PID: 4064 Comm: syz-executor.5 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:ffff8880492df510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048285280 RCX: ffffc90006e1c000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804828567c RBP: ffff888048285280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048285280 R13: 0000000000000001 R14: ffffffff85c10f80 R15: ffff88801c44a938 FS: 00007f47fa425700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020124000 CR3: 0000000020455000 CR4: 0000000000350ef0 Call Trace: __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: 0033:0x7f47fceafb19 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:00007f47fa425188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f47fcfc2f60 RCX: 00007f47fceafb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f47fcf09f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4e13340f R14: 00007f47fa425300 R15: 0000000000022000 irq event stamp: 211 hardirqs last enabled at (211): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (210): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (206): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (204): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop4: detected capacity change from 0 to 20 audit: type=1400 audit(1768847503.275:10): avc: denied { write } for pid=4047 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 tmpfs: Unsupported parameter 'huge' loop6: detected capacity change from 0 to 512 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:823 at rcu_sched_clock_irq+0x1431/0x2e50, CPU#1: syz-executor.5/4064 random: crng reseeded on system resumption Modules linked in: CPU: 1 UID: 0 PID: 4064 Comm: syz-executor.5 Tainted: G W 6.19.0-rc5-next-20260116 #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 90 dd 55 00 e9 12 f2 ff ff 48 c7 c7 b4 f2 66 86 e8 df dd 55 00 e9 07 ef ff ff e8 95 a2 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:ffff88806cf08b68 EFLAGS: 00010086 random: crng reseeded on system resumption RAX: 00000000ffffffff RBX: 0000000000000000 RCX: ffffffff815ddf6f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88804828567c RBP: ffff888048285280 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: ffffffff8666e857 R11: 0000000000000000 R12: ffff888048285280 R13: 0000000000000000 R14: ffffffff8666f2b4 R15: dffffc0000000000 FS: 00007f47fa425700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000206fd000 CR3: 0000000020455000 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:preempt_schedule_thunk+0x20/0x30 Code: 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 aa 3a af 03 41 5b 41 5a 41 59 41 58 58 59 <5a> 5e 5f 5d e9 97 2c b1 03 0f 1f 80 00 00 00 00 90 90 90 90 90 90 RSP: 0018:ffff8880492df508 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81532d93 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88806cf31f50 RBP: ffff8880492df520 R08: 0000000000000000 R09: fffffbfff0b82d10 R10: ffffffff85c16883 R11: 0000000000000001 R12: 1ffff1100925bea8 R13: 0000000000000001 R14: ffffffff85c10f80 R15: ffff88801c44a938 _raw_spin_unlock+0x32/0x40 __wait_on_freeing_inode+0x2e2/0x350 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: 0033:0x7f47fceafb19 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:00007f47fa425188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f47fcfc2f60 RCX: 00007f47fceafb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f47fcf09f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4e13340f R14: 00007f47fa425300 R15: 0000000000022000 irq event stamp: 211 hardirqs last enabled at (211): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (210): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (206): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (204): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.5/4064 Modules linked in: CPU: 0 UID: 0 PID: 4064 Comm: syz-executor.5 Tainted: G W 6.19.0-rc5-next-20260116 #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_exp_handler+0x12b/0x570 Code: 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 cb 03 00 00 0f b6 43 11 84 c0 75 b6 85 c9 74 1d 0f 8f bf 00 00 00 90 <0f> 0b 90 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6f d7 74 03 RSP: 0018:ffff88806ce08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff888048285280 RDI: ffff88804828567c RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: ffff88806ce08ff8 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31378 R15: ffff88806ce38820 FS: 00007f47fa425700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67d3db6718 CR3: 0000000020455000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0xa1/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x204/0x840 Code: e7 48 c7 03 00 00 00 00 e8 19 dc 89 03 4d 85 f6 75 ba 49 8d 7c 24 48 e8 9a be 89 03 e8 85 23 36 00 fb 65 48 8b 1d 34 05 66 06 <48> 8d bb b8 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff8880492df2a0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff888048285280 RCX: ffffffff817dfeab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8147dadb RBP: ffff8880492df2e8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e857 R11: 0000000040000000 R12: ffff88806ce379c0 R13: ffff888018f63700 R14: ffff88806cf37a20 R15: ffff888048285768 __schedule+0xfb9/0x4680 preempt_schedule_irq+0x4e/0x90 irqentry_exit+0x176/0x650 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:preempt_schedule_thunk+0x20/0x30 Code: 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 aa 3a af 03 41 5b 41 5a 41 59 41 58 58 59 <5a> 5e 5f 5d e9 97 2c b1 03 0f 1f 80 00 00 00 00 90 90 90 90 90 90 RSP: 0018:ffff8880492df508 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81532d93 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88806cf31f50 RBP: ffff8880492df520 R08: 0000000000000000 R09: fffffbfff0b82d10 R10: ffffffff85c16883 R11: 0000000000000001 R12: 1ffff1100925bea8 R13: 0000000000000001 R14: ffffffff85c10f80 R15: ffff88801c44a938 _raw_spin_unlock+0x32/0x40 __wait_on_freeing_inode+0x2e2/0x350 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: 0033:0x7f47fceafb19 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:00007f47fa425188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f47fcfc2f60 RCX: 00007f47fceafb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f47fcf09f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4e13340f R14: 00007f47fa425300 R15: 0000000000022000 irq event stamp: 211 hardirqs last enabled at (211): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (210): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (206): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (204): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'. loop2: detected capacity change from 0 to 8 loop4: detected capacity change from 0 to 32640 FAT-fs (loop4): invalid media value (0xea) FAT-fs (loop4): Can't find a valid FAT filesystem ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 55 push %rbp b: 48 89 e5 mov %rsp,%rbp e: 57 push %rdi f: 56 push %rsi 10: 52 push %rdx 11: 51 push %rcx 12: 50 push %rax 13: 41 50 push %r8 15: 41 51 push %r9 17: 41 52 push %r10 19: 41 53 push %r11 1b: e8 aa 3a af 03 callq 0x3af3aca 20: 41 5b pop %r11 22: 41 5a pop %r10 24: 41 59 pop %r9 26: 41 58 pop %r8 28: 58 pop %rax 29: 59 pop %rcx * 2a: 5a pop %rdx <-- trapping instruction 2b: 5e pop %rsi 2c: 5f pop %rdi 2d: 5d pop %rbp 2e: e9 97 2c b1 03 jmpq 0x3b12cca 33: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop