================================ WARNING: inconsistent lock state 6.1.101-syzkaller-00106-gc18e82d3ee44 #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz.4.138/4160 [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: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 irq event stamp: 22 hardirqs last enabled at (21): [] folio_memcg_lock+0x1be/0x380 mm/memcontrol.c:2110 hardirqs last disabled at (22): [] 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 *** 6 locks held by syz.4.138/4160: #0: ffff8880285a08d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff8880285a08d8 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5304 [inline] #0: ffff8880285a08d8 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5366 #1: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #1: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #1: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: filemap_map_pages+0x277/0x12c0 mm/filemap.c:3415 #2: ffff88801330ac18 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff88801330ac18 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: filemap_map_pages+0x958/0x12c0 mm/filemap.c:3426 #3: ffffffff8d12acc0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8d12acc0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:883 [inline] #3: ffffffff8d12acc0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xf6/0x440 include/linux/mmzone.h:1857 #4: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #4: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #4: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #4: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #5: ffff8880285a08d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #5: ffff8880285a08d8 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 1 PID: 4160 Comm: syz.4.138 Not tainted 6.1.101-syzkaller-00106-gc18e82d3ee44 #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:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] RIP: 0010:rcu_is_watching+0xc/0xb0 kernel/rcu/tree.c:721 Code: e9 6c ff ff ff 48 c7 c7 a0 16 13 8d 4c 89 f6 e8 fa 87 f0 02 e9 2b ff ff ff e8 f0 37 18 09 41 57 41 56 53 65 ff 05 ec 1c 8f 7e 2f 50 18 09 89 c3 83 f8 08 73 76 49 bf 00 00 00 00 00 fc ff df RSP: 0000:ffffc9000a83f7e0 EFLAGS: 00000287 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816a9317 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e7392a8 RBP: ffffc9000a83f930 R08: dffffc0000000000 R09: fffffbfff1ce7256 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001507f0c R13: ffffffff81eceb06 R14: ffffffff81eceb06 R15: dffffc0000000000 trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0xd6/0xa20 kernel/locking/lockdep.c:5673 rcu_lock_release include/linux/rcupdate.h:355 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:904 [inline] pfn_valid+0x3eb/0x440 include/linux/mmzone.h:1867 page_table_check_set+0x25/0x6d0 mm/page_table_check.c:108 page_table_check_pte_set include/linux/page_table_check.h:83 [inline] set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline] do_set_pte+0x584/0x590 mm/memory.c:4407 filemap_map_pages+0xc7c/0x12c0 mm/filemap.c:3452 do_fault_around mm/memory.c:4581 [inline] do_read_fault mm/memory.c:4607 [inline] do_fault mm/memory.c:4741 [inline] handle_pte_fault mm/memory.c:5013 [inline] __handle_mm_fault mm/memory.c:5155 [inline] handle_mm_fault+0x33e2/0x5340 mm/memory.c:5276 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline] handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f386710c910 Code: Unable to access opcode bytes at 0x7f386710c8e6. RSP: 002b:00007f3867f67118 EFLAGS: 00010246 RAX: fffffffffffffeb8 RBX: 00007f3867f676c0 RCX: 00007f38671a9ee9 RDX: 00007f3867f67d78 RSI: 0000000000000058 RDI: 00007f3867f676c0 RBP: 0000000000000000 R08: 00007f3867f676c0 R09: 00007ffc461574b7 R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffa8 R13: 000000000000000b R14: 00007ffc461573d0 R15: 00007ffc461574b8 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: e9 6c ff ff ff jmp 0xffffff71 5: 48 c7 c7 a0 16 13 8d mov $0xffffffff8d1316a0,%rdi c: 4c 89 f6 mov %r14,%rsi f: e8 fa 87 f0 02 call 0x2f0880e 14: e9 2b ff ff ff jmp 0xffffff44 19: e8 f0 37 18 09 call 0x918380e 1e: 41 57 push %r15 20: 41 56 push %r14 22: 53 push %rbx 23: 65 ff 05 ec 1c 8f 7e incl %gs:0x7e8f1cec(%rip) # 0x7e8f1d16 * 2a: e8 2f 50 18 09 call 0x918505e <-- trapping instruction 2f: 89 c3 mov %eax,%ebx 31: 83 f8 08 cmp $0x8,%eax 34: 73 76 jae 0xac 36: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 3d: fc ff df