================================ WARNING: inconsistent lock state 6.1.93-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.1/3659 [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_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 __put_user_nocheck_4+0x3/0x11 schedule_tail+0x91/0xb0 kernel/sched/core.c:5184 ret_from_fork+0x8/0x30 arch/x86/entry/entry_64.S:293 irq event stamp: 50 hardirqs last enabled at (49): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (49): [] _raw_spin_unlock_irqrestore+0x8b/0x130 kernel/locking/spinlock.c:194 hardirqs last disabled at (50): [] 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 *** 2 locks held by syz-executor.1/3659: #0: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline] #0: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x110/0x410 kernel/trace/bpf_trace.c:2312 #1: ffff88801abdea58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff88801abdea58 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 0 PID: 3659 Comm: syz-executor.1 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:search_exception_tables+0x0/0x60 kernel/extable.c:55 Code: f9 02 48 be ab aa aa aa aa aa aa aa 48 0f af f1 48 c7 c7 c0 77 c9 8c e9 de 34 24 09 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <53> 48 89 fb 48 c7 c0 c0 77 c9 8c 48 c7 c1 68 db c9 8c 48 29 c1 48 RSP: 0018:ffffc900047df798 EFLAGS: 00000246 RAX: ffffffff813d5540 RBX: 1ffff920008fbf63 RCX: 0000000000040000 RDX: ffffc90004c11000 RSI: 0000000000000097 RDI: ffffffff84631439 RBP: ffffc900047df908 R08: ffffffff813d1d2d R09: ffffed100357bd3e R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000e R13: dffffc0000000000 R14: 1ffff920008fbf00 R15: ffffc900047dfb18 fixup_exception+0xaa/0x1d60 arch/x86/mm/extable.c:225 kernelmode_fixup_or_oops+0x6b/0xd0 arch/x86/mm/fault.c:740 __bad_area_nosemaphore+0x117/0x720 arch/x86/mm/fault.c:797 handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x30d/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0x159/0x360 lib/strncpy_from_user.c:139 Code: 27 fd 48 83 fd 07 0f 86 af 00 00 00 4c 89 64 24 08 4c 89 7c 24 10 48 c7 44 24 18 f8 ff ff ff 45 31 ed 4d 89 f4 48 8b 44 24 08 <4e> 8b 3c 28 48 b8 ff fe fe fe fe fe fe fe 49 8d 1c 07 4d 89 fe 49 RSP: 0018:ffffc900047dfb48 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 00007fffffffef81 RCX: ffff888073c70000 RDX: ffffc90004c11000 RSI: 000000000000007f RDI: 0000000000000007 RBP: 000000000000007f R08: ffffffff84631411 R09: ffffffff81eeba13 R10: 0000000000000003 R11: ffff888073c70000 R12: ffffc900047dfc70 R13: 0000000000000000 R14: ffffc900047dfc70 R15: 000000000000007f strncpy_from_bpfptr include/linux/bpfptr.h:85 [inline] bpf_prog_load+0x188/0x1bb0 kernel/bpf/syscall.c:2515 __sys_bpf+0x382/0x6c0 kernel/bpf/syscall.c:5005 __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: 0033:0x7fdff4c7cea9 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:00007fdff5a900c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fdff4db3f80 RCX: 00007fdff4c7cea9 RDX: 0000000000000090 RSI: 0000000020000340 RDI: 0000000000000005 RBP: 00007fdff4cebff4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdff4db3f80 R15: 00007ffca6fda048 ---------------- Code disassembly (best guess): 0: f9 stc 1: 02 48 be add -0x42(%rax),%cl 4: ab stos %eax,%es:(%rdi) 5: aa stos %al,%es:(%rdi) 6: aa stos %al,%es:(%rdi) 7: aa stos %al,%es:(%rdi) 8: aa stos %al,%es:(%rdi) 9: aa stos %al,%es:(%rdi) a: aa stos %al,%es:(%rdi) b: aa stos %al,%es:(%rdi) c: 48 0f af f1 imul %rcx,%rsi 10: 48 c7 c7 c0 77 c9 8c mov $0xffffffff8cc977c0,%rdi 17: e9 de 34 24 09 jmp 0x92434fa 1c: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 23: 00 00 00 26: 0f 1f 40 00 nopl 0x0(%rax) * 2a: 53 push %rbx <-- trapping instruction 2b: 48 89 fb mov %rdi,%rbx 2e: 48 c7 c0 c0 77 c9 8c mov $0xffffffff8cc977c0,%rax 35: 48 c7 c1 68 db c9 8c mov $0xffffffff8cc9db68,%rcx 3c: 48 29 c1 sub %rax,%rcx 3f: 48 rex.W