================================ WARNING: inconsistent lock state 6.1.94-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/3918 [HC0[0]:SC1[1]:HE0:SE0] 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 {SOFTIRQ-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 copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:165 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout+0xd8/0x120 lib/iov_iter.c:170 _copy_to_iter+0x4a6/0x1000 lib/iov_iter.c:527 __skb_datagram_iter+0x319/0x780 net/core/datagram.c:442 skb_copy_datagram_iter+0xe1/0x2b0 net/core/datagram.c:527 skb_copy_datagram_msg include/linux/skbuff.h:3956 [inline] unix_stream_read_actor+0x6c/0xa0 net/unix/af_unix.c:2938 unix_stream_read_generic+0xe49/0x2370 net/unix/af_unix.c:2857 unix_stream_recvmsg+0x222/0x2b0 net/unix/af_unix.c:2975 ____sys_recvmsg+0x285/0x530 ___sys_recvmsg net/socket.c:2775 [inline] __sys_recvmsg+0x2e9/0x3d0 net/socket.c:2805 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 irq event stamp: 26995 hardirqs last enabled at (26994): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 hardirqs last disabled at (26995): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (26995): [] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170 softirqs last enabled at (26980): [] __do_softirq kernel/softirq.c:605 [inline] softirqs last enabled at (26980): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (26980): [] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 softirqs last disabled at (26991): [] __do_softirq kernel/softirq.c:605 [inline] softirqs last disabled at (26991): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (26991): [] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#10); lock(lock#10); *** DEADLOCK *** 5 locks held by syz-executor.3/3918: #0: ffff88807d359590 (&u->iolock){+.+.}-{3:3}, at: unix_stream_read_generic+0x293/0x2370 net/unix/af_unix.c:2759 #1: ffff88807e341058 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff88807e341058 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5304 [inline] #1: ffff88807e341058 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5366 #2: ffff8880b9928358 (&base->lock){-.-.}-{2:2}, at: __run_timers+0x111/0x890 kernel/time/timer.c:1802 #3: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #3: ffffffff8d12acc0 (rcu_read_lock){....}-{1:2}, at: trace_call_bpf+0xbe/0x6a0 kernel/trace/bpf_trace.c:134 #4: ffff88807e341058 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #4: ffff88807e341058 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x232/0x9c0 kernel/bpf/stackmap.c:144 stack backtrace: CPU: 1 PID: 3918 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 __lock_acquire+0xb7f/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_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_prog_run_array include/linux/bpf.h:1635 [inline] trace_call_bpf+0x345/0x6a0 kernel/trace/bpf_trace.c:135 perf_trace_run_bpf_submit+0x7b/0x1d0 kernel/events/core.c:9924 perf_trace_timer_class+0x2c8/0x380 include/trace/events/timer.h:12 trace_timer_cancel include/trace/events/timer.h:138 [inline] debug_deactivate kernel/time/timer.c:832 [inline] detach_timer+0x2f4/0x380 kernel/time/timer.c:878 expire_timers kernel/time/timer.c:1538 [inline] __run_timers+0x60c/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 __do_softirq kernel/softirq.c:605 [inline] invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124 Code: 2e 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 0f 1f 44 00 00 4c 89 f7 e8 7b 23 36 09 e8 06 1e 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28 RSP: 0018:ffffc900054e6ba8 EFLAGS: 00000286 RAX: 827e253da371e900 RBX: ffff8880286ebbb4 RCX: ffffffff816ad40a RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: ffff88802724d178 RBP: ffffc900054e6bf0 R08: dffffc0000000000 R09: fffffbfff2093a4b R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802724bb80 R13: 1ffff110173276eb R14: ffff8880b993aa00 R15: ffff8880b993b758 context_switch kernel/sched/core.c:5248 [inline] __schedule+0x1435/0x4550 kernel/sched/core.c:6558 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870 irqentry_exit+0x53/0x80 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:lock_release+0x637/0xa20 kernel/locking/lockdep.c:5686 Code: 3c 3b 00 74 08 4c 89 f7 e8 26 81 77 00 f6 84 24 91 00 00 00 02 75 6f 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc900054e6f40 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff92000a9cdfa RCX: ffffc900054e6f03 RDX: 0000000000000002 RSI: ffffffff8aec13c0 RDI: ffffffff8b3d4660 RBP: ffffc900054e7070 R08: dffffc0000000000 R09: fffffbfff1ce7146 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000a9cdf4 R13: 0000000000000246 R14: ffffc900054e6fd0 R15: dffffc0000000000 count_memcg_event_mm+0x3be/0x410 include/linux/memcontrol.h:1100 handle_mm_fault+0x15b/0x5340 mm/memory.c:5254 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline] handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc900054e7530 EFLAGS: 00050202 RAX: ffffffff84362c01 RBX: 00007fffffffe140 RCX: 0000000000000d00 RDX: 0000000000000ec0 RSI: ffff8880284621c0 RDI: 0000000020037000 RBP: ffffc900054e76c0 R08: dffffc0000000000 R09: ffffed100508c5d8 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000ec0 R13: 0000000000000000 R14: 0000000020036e40 R15: ffff888028462000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout+0xd8/0x120 lib/iov_iter.c:170 _copy_to_iter+0x4a6/0x1000 lib/iov_iter.c:527 __skb_datagram_iter+0xd4/0x780 net/core/datagram.c:419 skb_copy_datagram_iter+0xe1/0x2b0 net/core/datagram.c:527 skb_copy_datagram_msg include/linux/skbuff.h:3956 [inline] unix_stream_read_actor+0x6c/0xa0 net/unix/af_unix.c:2938 unix_stream_read_generic+0xe49/0x2370 net/unix/af_unix.c:2857 unix_stream_recvmsg+0x222/0x2b0 net/unix/af_unix.c:2975 ____sys_recvmsg+0x285/0x530 ___sys_recvmsg net/socket.c:2775 [inline] __sys_recvmsg+0x2e9/0x3d0 net/socket.c:2805 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: 0033:0x7fa0d8c7d0a9 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:00007fa0d99ed0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fa0d8db3f80 RCX: 00007fa0d8c7d0a9 RDX: 0000000040000100 RSI: 0000000020001140 RDI: 0000000000000006 RBP: 00007fa0d8cec074 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa0d8db3f80 R15: 00007fff4a2dd4d8 ---------------- Code disassembly (best guess): 0: 2e 0b 00 cs or (%rax),%eax 3: 48 83 c4 08 add $0x8,%rsp 7: 4c 89 f7 mov %r14,%rdi a: e8 98 30 00 00 call 0x30a7 f: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 14: 4c 89 f7 mov %r14,%rdi 17: e8 7b 23 36 09 call 0x9362397 1c: e8 06 1e 32 00 call 0x321e27 21: fb sti 22: 49 8d bc 24 f8 15 00 lea 0x15f8(%r12),%rdi 29: 00 * 2a: 48 89 f8 mov %rdi,%rax <-- trapping instruction 2d: 48 c1 e8 03 shr $0x3,%rax 31: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 38: fc ff df 3b: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax