================================ WARNING: inconsistent lock state 6.1.88-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.4/8076 [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_write_lock include/linux/mmap_lock.h:72 [inline] exit_mmap+0x85d/0x9f0 mm/mmap.c:3235 __mmput+0x115/0x3c0 kernel/fork.c:1199 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x9f6/0x26a0 kernel/exit.c:856 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 get_signal+0x16f7/0x17d0 kernel/signal.c:2862 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 irq event stamp: 80 hardirqs last enabled at (79): [] ___slab_alloc+0x1074/0x1270 mm/slub.c:3132 hardirqs last disabled at (80): [] sysvec_call_function_single+0xa/0xb0 arch/x86/kernel/smp.c:262 softirqs last enabled at (66): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (66): [] bpf_map_alloc_id+0x87/0xd0 kernel/bpf/syscall.c:384 softirqs last disabled at (64): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (64): [] bpf_map_alloc_id+0x21/0xd0 kernel/bpf/syscall.c:380 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-executor.4/8076: #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #1: ffff888077714c58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff888077714c58 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 0 PID: 8076 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:__orc_find arch/x86/kernel/unwind_orc.c:50 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline] RIP: 0010:unwind_next_frame+0x477/0x2220 arch/x86/kernel/unwind_orc.c:448 Code: 01 c5 48 89 2d da 48 ad 0e 48 bf 00 00 00 00 00 fc ff df 0f 85 d7 00 00 00 e9 ad 00 00 00 4d 89 f4 4d 89 f7 48 89 e8 4c 29 f8 <48> 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 RSP: 0018:ffffc9000521f5a0 EFLAGS: 00000202 RAX: 0000000000000010 RBX: ffffffff8e8abf34 RCX: ffffffff8e8abf38 RDX: ffffffff8ef9a94a RSI: ffffffff81f12f49 RDI: dffffc0000000000 RBP: ffffffff8e8abf30 R08: 000000000000000c R09: ffffc9000521f770 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8e8abf20 R13: ffffffff81f12f48 R14: ffffffff8e8abf20 R15: ffffffff8e8abf20 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_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:682 [inline] __alloc_file+0x26/0x230 fs/file_table.c:138 alloc_empty_file+0x92/0x180 fs/file_table.c:187 alloc_file+0x5c/0x5e0 fs/file_table.c:229 alloc_file_pseudo+0x259/0x2f0 fs/file_table.c:272 __anon_inode_getfile fs/anon_inodes.c:109 [inline] __anon_inode_getfd fs/anon_inodes.c:194 [inline] anon_inode_getfd+0xca/0x1e0 fs/anon_inodes.c:229 map_create+0x9b1/0xd20 kernel/bpf/syscall.c:1193 __sys_bpf+0x2d3/0x6c0 kernel/bpf/syscall.c:4987 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline] __se_sys_bpf kernel/bpf/syscall.c:5107 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5107 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: 0033:0x7f6f5d87dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6f5c3f60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6f5d9abf80 RCX: 00007f6f5d87dea9 RDX: 0000000000000048 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f6f5d8ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6f5d9abf80 R15: 00007ffd9a57d508 ---------------- Code disassembly (best guess): 0: 01 c5 add %eax,%ebp 2: 48 89 2d da 48 ad 0e mov %rbp,0xead48da(%rip) # 0xead48e3 9: 48 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%rdi 10: fc ff df 13: 0f 85 d7 00 00 00 jne 0xf0 19: e9 ad 00 00 00 jmp 0xcb 1e: 4d 89 f4 mov %r14,%r12 21: 4d 89 f7 mov %r14,%r15 24: 48 89 e8 mov %rbp,%rax 27: 4c 29 f8 sub %r15,%rax * 2a: 48 89 c1 mov %rax,%rcx <-- trapping instruction 2d: 48 c1 f9 02 sar $0x2,%rcx 31: 48 c1 e8 3f shr $0x3f,%rax 35: 48 01 c8 add %rcx,%rax 38: 48 83 e0 fe and $0xfffffffffffffffe,%rax 3c: 49 8d 1c 47 lea (%r15,%rax,2),%rbx