================================ WARNING: inconsistent lock state 6.1.100-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz.3.3030/10865 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff8880b9835e90 (lock#10){?.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9835e90 (lock#10){?.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x84/0x670 mm/mmap_lock.c:237 {HARDIRQ-ON-W} state was registered at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x9d/0x670 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:137 [inline] get_mmap_lock_carefully mm/memory.c:5304 [inline] lock_mm_and_find_vma+0x219/0x2e0 mm/memory.c:5366 do_user_addr_fault arch/x86/mm/fault.c:1312 [inline] handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x169/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:165 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] copyin+0xd8/0x120 lib/iov_iter.c:183 _copy_from_iter+0x493/0xff0 lib/iov_iter.c:631 copy_page_from_iter+0x76/0x100 lib/iov_iter.c:752 skb_copy_datagram_from_iter+0x2d4/0x6b0 net/core/datagram.c:581 unix_stream_sendmsg+0x78f/0x1070 net/unix/af_unix.c:2229 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514 ___sys_sendmsg net/socket.c:2568 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2597 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 irq event stamp: 3214 hardirqs last enabled at (3213): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 hardirqs last disabled at (3214): [] sysvec_call_function_single+0xa/0xb0 arch/x86/kernel/smp.c:262 softirqs last enabled at (2798): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (2798): [] fpregs_lock arch/x86/include/asm/fpu/api.h:72 [inline] softirqs last enabled at (2798): [] fpu_clone+0x258/0xc80 arch/x86/kernel/fpu/core.c:602 softirqs last disabled at (2796): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (2796): [] fpregs_lock arch/x86/include/asm/fpu/api.h:72 [inline] softirqs last disabled at (2796): [] fpu_clone+0x258/0xc80 arch/x86/kernel/fpu/core.c:602 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#10); lock(lock#10); *** DEADLOCK *** 2 locks held by syz.3.3030/10865: #0: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #0: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #1: ffff888028b04c58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff888028b04c58 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 0 PID: 10865 Comm: syz.3.3030 Not tainted 6.1.100-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 valid_state+0x136/0x1c0 kernel/locking/lockdep.c:3969 mark_lock_irq+0xa8/0xba0 kernel/locking/lockdep.c:4172 mark_lock+0x21c/0x340 kernel/locking/lockdep.c:4628 mark_usage kernel/locking/lockdep.c:4520 [inline] __lock_acquire+0xb40/0x1f80 kernel/locking/lockdep.c:5003 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x9d/0x670 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:137 [inline] stack_map_get_build_id_offset+0x99e/0x9c0 kernel/bpf/stackmap.c:144 __bpf_get_stack+0x495/0x570 kernel/bpf/stackmap.c:452 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1877 [inline] bpf_get_stack_raw_tp+0x1b2/0x220 kernel/trace/bpf_trace.c:1867 bpf_prog_ec3b2eefa702d8d3+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline] bpf_trace_run2+0x1fd/0x410 kernel/trace/bpf_trace.c:2312 trace_tlb_flush+0x151/0x1a0 include/trace/events/tlb.h:38 flush_tlb_func+0x4e3/0x620 arch/x86/mm/tlb.c:875 __flush_smp_call_function_queue+0x2d9/0xd00 kernel/smp.c:641 __sysvec_call_function_single+0xbb/0x360 arch/x86/kernel/smp.c:267 sysvec_call_function_single+0x89/0xb0 arch/x86/kernel/smp.c:262 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:661 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:171 [inline] RIP: 0010:unwind_next_frame+0x22a/0x2220 arch/x86/kernel/unwind_orc.c:448 Code: 85 8c 39 86 8f 48 89 d8 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 d0 1a 00 00 44 8b 03 41 ff c0 4b 8d 04 64 48 8d 94 00 58 73 e8 8e <48> c7 c0 8a 39 86 8f 48 39 c2 0f 83 f7 18 00 00 4b 8d 0c 40 48 8d RSP: 0018:ffffc9000348f240 EFLAGS: 00000206 RAX: 000000000004ba32 RBX: ffffffff8f8832ac RCX: 000000000009c075 RDX: ffffffff8ef1e7bc RSI: ffffffff817e4757 RDI: dffffc0000000000 RBP: 1ffff92000691e6a R08: 0000000000019372 R09: ffffc9000348f410 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000019366 R13: ffffffff817e4756 R14: 0000000000007e47 R15: 000000000009c075 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x292/0x510 mm/slub.c:3683 mmdrop include/linux/sched/mm.h:50 [inline] mmdrop_sched include/linux/sched/mm.h:78 [inline] finish_task_switch+0x2cd/0x810 kernel/sched/core.c:5148 context_switch kernel/sched/core.c:5247 [inline] __schedule+0x1447/0x4570 kernel/sched/core.c:6561 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6730 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6754 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 try_to_wake_up+0x87e/0x12e0 kernel/sched/core.c:4233 wake_up_process kernel/sched/core.c:4361 [inline] wake_up_q+0x8b/0xd0 kernel/sched/core.c:1006 futex_wake+0x4ea/0x590 kernel/futex/waitwake.c:184 do_futex+0x375/0x490 kernel/futex/syscalls.c:111 __do_sys_futex kernel/futex/syscalls.c:183 [inline] __se_sys_futex+0x3d7/0x460 kernel/futex/syscalls.c:164 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fe342975e99 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3437070f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fe342b05f68 RCX: 00007fe342975e99 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fe342b05f6c RBP: 00007fe342b05f60 R08: 0000000000000010 R09: 00007fe3437076c0 R10: 0000000000000133 R11: 0000000000000246 R12: 00007fe342b05f6c R13: 000000000000000b R14: 00007ffe2fcf60b0 R15: 00007ffe2fcf6198 ---------------- Code disassembly (best guess): 0: 85 8c 39 86 8f 48 89 test %ecx,-0x76b7707a(%rcx,%rdi,1) 7: d8 48 c1 fmuls -0x3f(%rax) a: e8 03 0f b6 04 call 0x4b60f12 f: 38 84 c0 0f 85 d0 1a cmp %al,0x1ad0850f(%rax,%rax,8) 16: 00 00 add %al,(%rax) 18: 44 8b 03 mov (%rbx),%r8d 1b: 41 ff c0 inc %r8d 1e: 4b 8d 04 64 lea (%r12,%r12,2),%rax 22: 48 8d 94 00 58 73 e8 lea -0x71178ca8(%rax,%rax,1),%rdx 29: 8e * 2a: 48 c7 c0 8a 39 86 8f mov $0xffffffff8f86398a,%rax <-- trapping instruction 31: 48 39 c2 cmp %rax,%rdx 34: 0f 83 f7 18 00 00 jae 0x1931 3a: 4b 8d 0c 40 lea (%r8,%r8,2),%rcx 3e: 48 rex.W 3f: 8d .byte 0x8d