================================ WARNING: inconsistent lock state 6.1.93-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.2/5376 [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 copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:232 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout lib/iov_iter.c:170 [inline] _copy_to_iter+0x2c2/0x1000 lib/iov_iter.c:527 copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725 pipe_read+0x579/0x12a0 fs/pipe.c:307 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7de/0xbe0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 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: 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 *** 3 locks held by syz-executor.2/5376: #0: ffff88807d69b5d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff88807d69b5d8 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5304 [inline] #0: ffff88807d69b5d8 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5366 #1: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #1: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #1: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #1: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #2: ffff88807d69b5d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #2: ffff88807d69b5d8 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 1 PID: 5376 Comm: syz-executor.2 Not tainted 6.1.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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:in_lock_functions+0x7/0x20 kernel/locking/spinlock.c:412 Code: 07 80 c1 03 38 c1 0f 8c 77 ff ff ff 48 c7 c7 a0 d7 cd 90 e8 db 5f 76 00 e9 66 ff ff ff cc cc cc cc cc cc 48 c7 c0 18 66 95 8a <48> 39 c7 0f 93 c0 48 c7 c1 b1 98 95 8a 48 39 cf 0f 92 c1 20 c1 0f RSP: 0000:ffffc90003a3fc08 EFLAGS: 00000246 RAX: ffffffff8a956618 RBX: 0000000000000001 RCX: ffffffff91c95103 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8a95670e RBP: ffffc90003a3fee8 R08: ffffffff81cd8d1d R09: ffffc90003a3fe40 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000747fce R13: ffff88801a725cc0 R14: ffffffff8a95670e R15: dffffc0000000000 get_lock_parent_ip include/linux/ftrace.h:950 [inline] preempt_latency_start kernel/sched/core.c:5689 [inline] preempt_count_add+0x8f/0x180 kernel/sched/core.c:5714 __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:154 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: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: 0033:0x7f45df233ff7 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 a2 8e 04 00 eb c1 0f b6 35 b9 16 cb 00 <8b> bf 98 00 00 00 31 d2 e8 0c 70 ff ff eb 83 48 8d 3d 81 63 0a 00 RSP: 002b:00007f45e006d180 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 00007f45e006d6c0 RCX: 00007f45df251496 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f45df3b3f80 RBP: 00007f45df3b3f80 R08: 0000000000000000 R09: 00007fff65710a57 R10: 0000000000000008 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000000b R14: 00007fff65710970 R15: 00007fff65710a58 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 80 c1 03 add $0x3,%cl 3: 38 c1 cmp %al,%cl 5: 0f 8c 77 ff ff ff jl 0xffffff82 b: 48 c7 c7 a0 d7 cd 90 mov $0xffffffff90cdd7a0,%rdi 12: e8 db 5f 76 00 call 0x765ff2 17: e9 66 ff ff ff jmp 0xffffff82 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: 48 c7 c0 18 66 95 8a mov $0xffffffff8a956618,%rax * 29: 48 39 c7 cmp %rax,%rdi <-- trapping instruction 2c: 0f 93 c0 setae %al 2f: 48 c7 c1 b1 98 95 8a mov $0xffffffff8a9598b1,%rcx 36: 48 39 cf cmp %rcx,%rdi 39: 0f 92 c1 setb %cl 3c: 20 c1 and %al,%cl 3e: 0f .byte 0xf