forcing mempool usage for bio_alloc_bioset+0x3f1/0x8f0 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.3/6526 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.3/6526: #0: ffff88800f87a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804989b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f87e950 (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: 6526 Comm: syz-executor.3 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: 0033:0x7f11ded06427 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:00007ffff8b825b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11ded06427 RDX: 00007ffff8b82697 RSI: 00007f11ded61019 RDI: 00007ffff8b82680 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffff8b82450 R10: 00007ffff8b82307 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffff8b82680 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/6526 Modules linked in: CPU: 0 UID: 0 PID: 6526 Comm: syz-executor.3 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88804b751b80 RCX: ffffffff81893b34 RDX: 0000000000000000 RSI: ffffffff81893b4b RDI: ffff88804b751f7c RBP: ffff88804b751b80 R08: ffffffff81893a8d R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff88804b751b80 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 000055557287c400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11ded86543 CR3: 000000004a408000 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_cmp8+0x8/0x20 Code: 00 00 00 e9 da fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <48> 89 f2 48 89 fe bf 06 00 00 00 e9 a8 fe ff ff 0f 1f 84 00 00 00 RSP: 0018:ffff8880512af748 EFLAGS: 00000287 RAX: 0000000000000003 RBX: ffffffff86683560 RCX: ffffffff84c4fbdf RDX: 0000000000000000 RSI: ffffffff815d2042 RDI: ffffffff815d780f RBP: ffffffff815d2042 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815d1d8b R11: 0000000000000000 R12: ffffffff815d780f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/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 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:ffff8880512af9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804b751b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804b751f7c RBP: ffff88804b751b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b751b80 R13: 0000000000000001 R14: ffffffff85c0e8c0 R15: ffff888049a66bf0 __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: 0033:0x7f11ded06427 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:00007ffff8b825b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11ded06427 RDX: 00007ffff8b82697 RSI: 00007f11ded61019 RDI: 00007ffff8b82680 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffff8b82450 R10: 00007ffff8b82307 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffff8b82680 irq event stamp: 183 hardirqs last enabled at (183): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (182): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (178): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (176): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 6539 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_from_user+0x30/0xd0 __ext4_ioctl+0x1e95/0x38e0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f138423db19 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:00007f13817b3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1384350f60 RCX: 00007f138423db19 RDX: 00000000200014c0 RSI: 00000000c0185879 RDI: 0000000000000003 RBP: 00007f13817b31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffef4008d9f R14: 00007f13817b3300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 6543 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_to_user+0x32/0xd0 simple_read_from_buffer+0xe0/0x180 proc_fail_nth_read+0x18a/0x240 vfs_read+0x1eb/0xc70 ksys_read+0x121/0x240 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0d35b6169c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f0d33124170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0d35b6169c RDX: 000000000000000f RSI: 00007f0d331241e0 RDI: 0000000000000004 RBP: 00007f0d331241d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdd38f9d6f R14: 00007f0d33124300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 6557 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_to_user+0x32/0xd0 __ext4_ioctl+0x16d6/0x38e0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f138423db19 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:00007f13817b3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1384350f60 RCX: 00007f138423db19 RDX: 00000000200014c0 RSI: 00000000c0185879 RDI: 0000000000000003 RBP: 00007f13817b31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffef4008d9f R14: 00007f13817b3300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 6576 Comm: syz-executor.5 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_from_user+0x30/0xd0 __ext4_ioctl+0x1e95/0x38e0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1a97c63b19 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:00007f1a951d9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1a97d76f60 RCX: 00007f1a97c63b19 RDX: 00000000200014c0 RSI: 00000000c0185879 RDI: 0000000000000003 RBP: 00007f1a951d91d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff5244c02f R14: 00007f1a951d9300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 6587 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 _copy_to_user+0x32/0xd0 simple_read_from_buffer+0xe0/0x180 proc_fail_nth_read+0x18a/0x240 vfs_read+0x1eb/0xc70 ksys_read+0x121/0x240 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f13841f069c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f13817b3170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13841f069c RDX: 000000000000000f RSI: 00007f13817b31e0 RDI: 0000000000000004 RBP: 00007f13817b31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffef4008d9f R14: 00007f13817b3300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: e9 da fe ff ff jmpq 0xfffffee1 7: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) e: 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: f3 0f 1e fa endbr64 25: 48 8b 0c 24 mov (%rsp),%rcx * 29: 48 89 f2 mov %rsi,%rdx <-- trapping instruction 2c: 48 89 fe mov %rdi,%rsi 2f: bf 06 00 00 00 mov $0x6,%edi 34: e9 a8 fe ff ff jmpq 0xfffffee1 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax)