================================ WARNING: inconsistent lock state 5.15.157-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.0/8058 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff8880b9b35bb8 (lock#9){?.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 include/linux/local_lock_internal.h:28 {HARDIRQ-ON-W} state was registered at: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 local_lock_acquire+0x29/0x170 include/linux/local_lock_internal.h:29 __mmap_lock_do_trace_acquire_returned+0x7c/0x340 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] do_user_addr_fault arch/x86/mm/fault.c:1329 [inline] handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x59c/0x740 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568 irq event stamp: 32 hardirqs last enabled at (31): [] ___slab_alloc+0xd12/0xe10 mm/slub.c:2963 hardirqs last disabled at (32): [] sysvec_call_function_single+0xa/0xb0 arch/x86/kernel/smp.c:243 softirqs last enabled at (0): [] copy_process+0x13b9/0x3ef0 kernel/fork.c:2151 softirqs last disabled at (0): [<0000000000000000>] 0x0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#9); lock(lock#9); *** DEADLOCK *** 3 locks held by syz-executor.0/8058: #0: ffffffff8cea94f8 (tomoyo_ss){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311 #1: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311 #2: ffff8880244f5528 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #2: ffff8880244f5528 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x23e/0x930 kernel/bpf/stackmap.c:185 stack backtrace: CPU: 1 PID: 8058 Comm: syz-executor.0 Not tainted 5.15.157-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+0x1e3/0x2d0 lib/dump_stack.c:106 valid_state+0x134/0x1c0 kernel/locking/lockdep.c:3932 mark_lock_irq+0xa8/0xba0 kernel/locking/lockdep.c:4135 mark_lock+0x21a/0x340 kernel/locking/lockdep.c:4591 mark_usage kernel/locking/lockdep.c:4483 [inline] __lock_acquire+0xb5c/0x1ff0 kernel/locking/lockdep.c:4966 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 local_lock_acquire+0x29/0x170 include/linux/local_lock_internal.h:29 __mmap_lock_do_trace_acquire_returned+0x7c/0x340 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+0x612/0x930 kernel/bpf/stackmap.c:185 __bpf_get_stack+0x495/0x570 kernel/bpf/stackmap.c:496 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline] bpf_get_stack_raw_tp+0x1b2/0x220 kernel/trace/bpf_trace.c:1480 bpf_prog_e6cf5f9c69743609+0x3a/0x6c4 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline] bpf_trace_run2+0x19e/0x340 kernel/trace/bpf_trace.c:1917 trace_tlb_flush+0xed/0x110 include/trace/events/tlb.h:38 flush_tlb_func+0x480/0x590 arch/x86/mm/tlb.c:851 flush_smp_call_function_queue+0x2b5/0x760 kernel/smp.c:628 __sysvec_call_function_single+0x9a/0x250 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xb0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:646 RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline] RIP: 0010:tomoyo_realpath_from_path+0x1bd/0x5e0 security/tomoyo/realpath.c:264 Code: 0f 84 85 00 00 00 48 8b 4c 24 20 48 89 c8 48 c1 e8 03 80 3c 28 00 74 0f 48 8b 7c 24 20 e8 4b 34 03 fe 48 8b 4c 24 20 48 8b 19 <48> 83 c3 68 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 2a RSP: 0018:ffffc90002ed7b70 EFLAGS: 00000246 RAX: 1ffff11002cb7c0d RBX: ffff888012030468 RCX: ffff8880165be068 RDX: 0000000000000000 RSI: ffffc90002ed791c RDI: 000000007e6aa4f8 RBP: dffffc0000000000 R08: 0000000000000001 R09: fffffbfff1bc8c2e R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000001000 R13: ffff888075dc9690 R14: 0000000000000fff R15: ffff88805df4e000 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x225/0x810 security/tomoyo/file.c:723 security_file_ioctl+0x6d/0xa0 security/security.c:1555 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x47/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f2547341c0b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007f25458b40f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2547341c0b RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8 RBP: 00007f254746ff80 R08: 0000000000000000 R09: 00007ffdba72b817 R10: 0000000000000008 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000000b R14: 00007ffdba72b730 R15: 00007ffdba72b818 ---------------- Code disassembly (best guess): 0: 0f 84 85 00 00 00 je 0x8b 6: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx b: 48 89 c8 mov %rcx,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 16: 74 0f je 0x27 18: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 1d: e8 4b 34 03 fe call 0xfe03346d 22: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx 27: 48 8b 19 mov (%rcx),%rbx * 2a: 48 83 c3 68 add $0x68,%rbx <-- trapping instruction 2e: 48 89 d8 mov %rbx,%rax 31: 48 c1 e8 03 shr $0x3,%rax 35: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 39: 74 08 je 0x43 3b: 48 89 df mov %rbx,%rdi 3e: e8 .byte 0xe8 3f: 2a .byte 0x2a