================================ WARNING: inconsistent lock state 6.1.94-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.3/8467 [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 __put_user_nocheck_8+0x3/0x21 clear_rseq_cs kernel/rseq.c:228 [inline] rseq_ip_fixup kernel/rseq.c:262 [inline] __rseq_handle_notify_resume+0x5e6/0x1500 kernel/rseq.c:300 rseq_handle_notify_resume include/linux/sched.h:2329 [inline] resume_user_mode_work include/linux/resume_user_mode.h:61 [inline] exit_to_user_mode_loop+0xb4/0x100 kernel/entry/common.c:177 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: 36 hardirqs last enabled at (35): [] seqcount_lockdep_reader_access+0x149/0x220 include/linux/seqlock.h:104 hardirqs last disabled at (36): [] 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.3/8467: #0: ffffffff8d718ea8 (tomoyo_ss){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d718ea8 (tomoyo_ss){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline] #0: ffffffff8d718ea8 (tomoyo_ss){....}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1110 [inline] #0: ffffffff8d718ea8 (tomoyo_ss){....}-{0:0}, at: tomoyo_path_number_perm+0x1f2/0x7f0 security/tomoyo/file.c:722 #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: ffff88807d480158 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #2: ffff88807d480158 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 1 PID: 8467 Comm: syz-executor.3 Not tainted 6.1.94-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:PageTail include/linux/page-flags.h:292 [inline] RIP: 0010:folio_flags include/linux/page-flags.h:319 [inline] RIP: 0010:folio_test_slab include/linux/page-flags.h:487 [inline] RIP: 0010:kfree+0x6e/0x190 mm/slab_common.c:1000 Code: e8 06 48 83 e0 c0 48 ba 00 00 00 00 00 ea ff ff 48 8b 4c 10 08 f6 c1 01 0f 85 14 01 00 00 48 01 d0 0f 1f 44 00 00 48 8b 48 08 c1 01 0f 85 c9 00 00 00 0f 1f 44 00 00 48 f7 00 00 02 00 00 74 RSP: 0018:ffffc90005f3fb58 EFLAGS: 00000286 RAX: ffffea0000a4cc00 RBX: ffff888029336000 RCX: 0000000000000000 RDX: ffffea0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888029336ff0 R08: ffffffff813db068 R09: 0000000000000001 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000fff R13: ffff888029336000 R14: ffffffff83f4154f R15: ffff888029336000 tomoyo_realpath_from_path+0x59f/0x5d0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x21f/0x7f0 security/tomoyo/file.c:723 security_file_ioctl+0x6d/0xa0 security/security.c:1568 __do_sys_ioctl fs/ioctl.c:864 [inline] __se_sys_ioctl+0x47/0x160 fs/ioctl.c:856 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: 0033:0x7f5b2da7cc0b 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:00007f5b2e82c0f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5b2da7cc0b RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8 RBP: 00007f5b2dbb3f80 R08: 0000000000000000 R09: 00007ffc2f041357 R10: 0000000000000008 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000000b R14: 00007ffc2f041270 R15: 00007ffc2f041358 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 48 83 e0 c0 and $0xffffffffffffffc0,%rax 4: 48 ba 00 00 00 00 00 movabs $0xffffea0000000000,%rdx b: ea ff ff e: 48 8b 4c 10 08 mov 0x8(%rax,%rdx,1),%rcx 13: f6 c1 01 test $0x1,%cl 16: 0f 85 14 01 00 00 jne 0x130 1c: 48 01 d0 add %rdx,%rax 1f: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 24: 48 8b 48 08 mov 0x8(%rax),%rcx * 28: f6 c1 01 test $0x1,%cl <-- trapping instruction 2b: 0f 85 c9 00 00 00 jne 0xfa 31: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 36: 48 f7 00 00 02 00 00 testq $0x200,(%rax) 3d: 74 .byte 0x74