================================ WARNING: inconsistent lock state 6.10.0-rc5-syzkaller-00012-g626737a5791b #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz.1.803/7747 [HC1[1]:SC0[2]:HE0:SE0] takes: ffff8880b95387e8 (lock#10){?.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b95387e8 (lock#10){?.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x8f/0x630 mm/mmap_lock.c:237 {HARDIRQ-ON-W} state was registered at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0xa8/0x630 mm/mmap_lock.c:237 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_write_lock_killable include/linux/mmap_lock.h:123 [inline] __do_sys_munlock mm/mlock.c:697 [inline] __se_sys_munlock+0x1f9/0x220 mm/mlock.c:688 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 353415 hardirqs last enabled at (353413): [] __local_bh_enable_ip+0x168/0x200 kernel/softirq.c:387 hardirqs last disabled at (353415): [] sysvec_call_function_single+0xe/0xc0 arch/x86/kernel/smp.c:266 softirqs last enabled at (353412): [] bpf_test_run+0x31e/0x910 softirqs last disabled at (353414): [] bpf_test_run+0x31e/0x910 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.1.803/7747: #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: bpf_test_timer_enter+0x19/0x140 net/bpf/test_run.c:40 #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2402 [inline] #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2444 #2: ffff88807b060b18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline] #2: ffff88807b060b18 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x237/0x9d0 kernel/bpf/stackmap.c:141 stack backtrace: CPU: 1 PID: 7747 Comm: syz.1.803 Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #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+0x241/0x360 lib/dump_stack.c:114 valid_state+0x13a/0x1c0 kernel/locking/lockdep.c:4013 mark_lock_irq+0xbb/0xc20 kernel/locking/lockdep.c:4216 mark_lock+0x223/0x350 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4564 [inline] __lock_acquire+0xb8e/0x1fd0 kernel/locking/lockdep.c:5091 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0xa8/0x630 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:164 [inline] stack_map_get_build_id_offset+0x9af/0x9d0 kernel/bpf/stackmap.c:141 __bpf_get_stack+0x4ad/0x5a0 kernel/bpf/stackmap.c:449 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1994 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1984 bpf_prog_e6cf5f9c69743609+0x42/0x4a bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:682 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline] bpf_trace_run2+0x47f/0x540 kernel/trace/bpf_trace.c:2444 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38 flush_tlb_func+0x4e7/0x630 arch/x86/mm/tlb.c:892 csd_do_func kernel/smp.c:133 [inline] __flush_smp_call_function_queue+0x3fe/0x1690 kernel/smp.c:511 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:__bpf_prog_run include/linux/filter.h:685 [inline] RIP: 0010:bpf_prog_run include/linux/filter.h:698 [inline] RIP: 0010:bpf_test_run+0x65d/0x910 net/bpf/test_run.c:425 Code: 48 8b 7c 24 30 48 8b 74 24 38 e8 ee 16 f9 01 41 89 c7 e8 26 93 9d f7 48 89 44 24 18 48 8b 44 24 20 48 c1 e8 03 42 80 3c 28 00 <74> 0a 48 8b 7c 24 20 e8 a7 01 64 f8 48 8b 44 24 20 48 8b 00 48 89 RSP: 0018:ffffc900095279a0 EFLAGS: 00000246 RAX: 1ffff92000a92204 RBX: 1ffff92000a92206 RCX: 0000000000040000 RDX: ffffc90011c28000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90009527b90 R08: ffffffff81356421 R09: ffffffff896087a8 R10: 0000000000000004 R11: ffff88807b915a00 R12: ffffffff8997cd8e R13: dffffc0000000000 R14: ffffc90005491030 R15: 0000000000000000 bpf_prog_test_run_skb+0xafa/0x13a0 net/bpf/test_run.c:1072 bpf_prog_test_run+0x33c/0x3b0 kernel/bpf/syscall.c:4292 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5706 __do_sys_bpf kernel/bpf/syscall.c:5795 [inline] __se_sys_bpf kernel/bpf/syscall.c:5793 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5793 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f31d2f75d39 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:00007f31d3c8d048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f31d3104070 RCX: 00007f31d2f75d39 RDX: 0000000000000050 RSI: 0000000020000680 RDI: 000000000000000a RBP: 00007f31d2ff6766 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f31d3104070 R15: 00007ffdeb49d818 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 48 8b 7c 24 30 mov 0x30(%rsp),%rdi 5: 48 8b 74 24 38 mov 0x38(%rsp),%rsi a: e8 ee 16 f9 01 call 0x1f916fd f: 41 89 c7 mov %eax,%r15d 12: e8 26 93 9d f7 call 0xf79d933d 17: 48 89 44 24 18 mov %rax,0x18(%rsp) 1c: 48 8b 44 24 20 mov 0x20(%rsp),%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) * 2a: 74 0a je 0x36 <-- trapping instruction 2c: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 31: e8 a7 01 64 f8 call 0xf86401dd 36: 48 8b 44 24 20 mov 0x20(%rsp),%rax 3b: 48 8b 00 mov (%rax),%rax 3e: 48 rex.W 3f: 89 .byte 0x89