===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/288 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.7/288: #0: ffff88800f6c23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801add7640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6c6950 (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: 288 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260115 #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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb9dc93c27 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:00007ffe94af74e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe94af7570 RCX: 00007fdb9dc93c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe94af7570 RBP: 00007ffe94af754c R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffe94af7285 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000acb5c R14: 0000000000000002 R15: 00007ffe94af75b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/288 Modules linked in: CPU: 0 UID: 0 PID: 288 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260115 #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:ffff88801a72f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b213700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801b213afc RBP: ffff88801b213700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b213700 R13: 0000000000000001 R14: ffffffff85c0e0a0 R15: ffff888048ca8318 FS: 0000555566647400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe94af5ca8 CR3: 000000000d05d000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb9dc93c27 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:00007ffe94af74e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe94af7570 RCX: 00007fdb9dc93c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe94af7570 RBP: 00007ffe94af754c R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffe94af7285 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000acb5c R14: 0000000000000002 R15: 00007ffe94af75b0 irq event stamp: 692347 hardirqs last enabled at (692347): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (692346): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (692342): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (692340): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1 sclass=netlink_route_socket pid=6765 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1 sclass=netlink_route_socket pid=6765 comm=syz-executor.5 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.7/288 Modules linked in: CPU: 0 UID: 0 PID: 288 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260115 #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:ffff88806ce085d0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801b213700 RDI: ffff88801b213afc RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd2a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31378 R15: ffff88806ce38820 FS: 0000555566647400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f280bc2a000 CR3: 000000000d05d000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0x5f/0xc0 asm_sysvec_call_function_single+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:ffff88806ce08748 EFLAGS: 00000283 RAX: 0000000000000003 RBX: ffffffff8667ee80 RCX: ffffffff84c54bdf RDX: 0000000000000000 RSI: ffffffff814eb4ba RDI: ffffffff815d742f RBP: ffffffff814eb4ba R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff814eb4b1 R11: 0000000000000000 R12: ffffffff815d742f 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 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:ffff88806ce089a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b213700 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8135f8c2 RDI: ffff88801b213afc RBP: ffff88801b213700 R08: 0000000000000001 R09: ffff88806ce08a80 R10: 000000000003d20b R11: 0000000000032ecd R12: ffff88801b213700 R13: ffff88806ce08a88 R14: ffff88801a72fdb8 R15: ffff88806ce08a40 unwind_next_frame+0x3bc/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_record_aux_stack+0x89/0xa0 __call_rcu_common.constprop.0+0x70/0xad0 kmem_cache_free+0x369/0x670 rcu_core+0x543/0x1b30 handle_softirqs+0x1b1/0x7d0 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__report_bug+0x4dd/0x5b0 Code: 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 8c 6c 86 72 b2 e8 65 36 b0 fc 4c 89 e7 e8 9d f7 ff ff RSP: 0018:ffff88801a72f1d0 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8667c830 RCX: ffffffff84c54bdf RDX: ffff88801b213700 RSI: ffffffff84c54be9 RDI: 0000000000000006 RBP: ffffffff8143c42b R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8143c42b 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:ffff88801a72f420 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b213700 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8135f8c2 RDI: ffff88801b213afc RBP: ffff88801b213700 R08: 0000000000000001 R09: ffff88801a72f500 R10: 000000000003d20b R11: 0000000000027fd2 R12: ffff88801b213700 R13: ffff88801a72f508 R14: ffff88801a72fee8 R15: ffff88801a72f4c0 unwind_next_frame+0x3bc/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_record_aux_stack+0x89/0xa0 __call_rcu_common.constprop.0+0x70/0xad0 put_task_struct_rcu_user+0x75/0xc0 __schedule+0xfb9/0x4680 preempt_schedule+0x4d/0x80 preempt_schedule_thunk+0x16/0x30 _raw_spin_unlock+0x32/0x40 __wait_on_freeing_inode+0x2e2/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb9dc93c27 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:00007ffe94af74e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe94af7570 RCX: 00007fdb9dc93c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe94af7570 RBP: 00007ffe94af754c R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffe94af7285 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000acb5c R14: 0000000000000002 R15: 00007ffe94af75b0 irq event stamp: 692347 hardirqs last enabled at (692347): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (692346): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (692342): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (692340): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2 sclass=netlink_route_socket pid=6776 comm=syz-executor.5 ---------------- 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)