================================ WARNING: inconsistent lock state 6.1.88-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.4/6418 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff8880b9935e90 (lock#10){?.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9935e90 (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:1343 [inline] handle_page_fault arch/x86/mm/fault.c:1462 [inline] exc_page_fault+0x169/0x660 arch/x86/mm/fault.c:1518 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 irq event stamp: 32 hardirqs last enabled at (31): [] native_save_fl arch/x86/include/asm/irqflags.h:22 [inline] hardirqs last enabled at (31): [] arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] hardirqs last enabled at (31): [] arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline] hardirqs last enabled at (31): [] count_memcg_events include/linux/memcontrol.h:1066 [inline] hardirqs last enabled at (31): [] count_memcg_event_mm+0x232/0x410 include/linux/memcontrol.h:1098 hardirqs last disabled at (32): [] sysvec_call_function_single+0xa/0xb0 arch/x86/kernel/smp.c:262 softirqs last enabled at (0): [] rcu_lock_acquire include/linux/rcupdate.h:350 [inline] softirqs last enabled at (0): [] rcu_read_lock include/linux/rcupdate.h:791 [inline] softirqs last enabled at (0): [] copy_process+0x9e1/0x4060 kernel/fork.c:2132 softirqs last disabled at (0): [<0000000000000000>] 0x0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#10); lock(lock#10); *** DEADLOCK *** 4 locks held by syz-executor.4/6418: #0: ffff888018740158 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff888018740158 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5304 [inline] #0: ffff888018740158 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5366 #1: ffff888027e8e1f8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #1: ffff888027e8e1f8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: do_anonymous_page mm/memory.c:4152 [inline] #1: ffff888027e8e1f8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: handle_pte_fault mm/memory.c:5011 [inline] #1: ffff888027e8e1f8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: __handle_mm_fault mm/memory.c:5155 [inline] #1: ffff888027e8e1f8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: handle_mm_fault+0x38c0/0x5340 mm/memory.c:5276 #2: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #2: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #2: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #2: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #3: ffff888018740158 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #3: ffff888018740158 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 1 PID: 6418 Comm: syz-executor.4 Not tainted 6.1.88-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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_e6cf5f9c69743609+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:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5fb/0xc50 kernel/locking/qspinlock.c:511 Code: 01 00 00 49 89 dd c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 44 01 00 00 48 8b 04 24 c6 00 01 bb 00 80 ff ff eb 06 f3 90 c3 74 5d 41 0f b6 04 14 84 c0 75 36 41 80 3f 00 75 eb 4c 89 ff RSP: 0000:ffffc900031bfa40 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 00000000ffffb172 RCX: 1ffff11004fd1c3c RDX: dffffc0000000000 RSI: 0000000000000002 RDI: ffff888027e8e1e2 RBP: ffffc900031bfb38 R08: dffffc0000000000 R09: ffffed1004fd1c3d R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004fd1c3c R13: ffff8880b993b854 R14: 1ffff11017320001 R15: ffff888027e8e1e0 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x269/0x370 kernel/locking/spinlock_debug.c:115 spin_lock include/linux/spinlock.h:351 [inline] do_anonymous_page mm/memory.c:4152 [inline] handle_pte_fault mm/memory.c:5011 [inline] __handle_mm_fault mm/memory.c:5155 [inline] handle_mm_fault+0x38c0/0x5340 mm/memory.c:5276 do_user_addr_fault arch/x86/mm/fault.c:1371 [inline] handle_page_fault arch/x86/mm/fault.c:1462 [inline] exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1518 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f579f634d37 Code: b9 40 42 0f 00 ba 81 00 00 00 4c 89 e6 41 c7 04 24 01 00 00 00 bf ca 00 00 00 31 c0 e8 62 91 04 00 eb c1 0f b6 35 79 09 ca 00 <8b> bf 98 00 00 00 31 d2 e8 5c 6f ff ff eb 83 48 8d 3d a2 53 09 00 RSP: 002b:00007f57a0365180 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 00007f57a03656c0 RCX: 00007f579f652496 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f579f7abf80 RBP: 00007f579f7abf80 R08: 0000000000000000 R09: 00007fff77034117 R10: 0000000000000008 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000000b R14: 00007fff77034030 R15: 00007fff77034118 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 49 89 add %cl,-0x77(%rcx) 5: dd c6 ffree %st(6) 7: 03 00 add (%rax),%eax 9: 48 8b 44 24 10 mov 0x10(%rsp),%rax e: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 12: 84 c0 test %al,%al 14: 0f 85 44 01 00 00 jne 0x15e 1a: 48 8b 04 24 mov (%rsp),%rax 1e: c6 00 01 movb $0x1,(%rax) 21: bb 00 80 ff ff mov $0xffff8000,%ebx 26: eb 06 jmp 0x2e 28: f3 90 pause * 2a: ff c3 inc %ebx <-- trapping instruction 2c: 74 5d je 0x8b 2e: 41 0f b6 04 14 movzbl (%r12,%rdx,1),%eax 33: 84 c0 test %al,%al 35: 75 36 jne 0x6d 37: 41 80 3f 00 cmpb $0x0,(%r15) 3b: 75 eb jne 0x28 3d: 4c 89 ff mov %r15,%rdi