================================ WARNING: inconsistent lock state 6.9.0-rc6-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/8843 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8880b9438a80 (lock#10){+.?.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9438a80 (lock#10){+.?.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x7f/0x790 mm/mmap_lock.c:237 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x97/0x790 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:166 [inline] get_mmap_lock_carefully mm/memory.c:5633 [inline] lock_mm_and_find_vma+0xeb/0x580 mm/memory.c:5693 do_user_addr_fault+0x29c/0x1080 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86 schedule_tail+0xa6/0xd0 kernel/sched/core.c:5344 ret_from_fork+0x23/0x80 arch/x86/kernel/process.c:143 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 irq event stamp: 6997 hardirqs last enabled at (6996): [] __do_softirq+0x1d6/0x922 kernel/softirq.c:538 hardirqs last disabled at (6997): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (6997): [] _raw_spin_lock_irq+0x45/0x50 kernel/locking/spinlock.c:170 softirqs last enabled at (6948): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (6948): [] napi_get_frags_check+0x86/0xa0 net/core/skbuff.c:305 softirqs last disabled at (6995): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (6995): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (6995): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#10); lock(lock#10); *** DEADLOCK *** 7 locks held by syz-executor.3/8843: #0: ffffffff8f2ec6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:501 #1: ffffffff8f3014c8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x225/0x5f0 net/ipv4/ip_tunnel.c:1116 #2: ffffc90000007cb0 (&(&nsim_dev->trap_data->trap_report_dw)->timer){..-.}-{0:0}, at: call_timer_fn+0x11a/0x610 kernel/time/timer.c:1790 #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #3: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x1020 kernel/workqueue.c:2324 #4: ffff8880b943d998 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1020 kernel/workqueue.c:2360 #5: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #5: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #5: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #5: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0xf8/0x440 kernel/trace/bpf_trace.c:2421 #6: ffff888051a09e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline] #6: ffff888051a09e20 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x1e8/0x7d0 kernel/bpf/stackmap.c:141 stack backtrace: CPU: 0 PID: 8843 Comm: syz-executor.3 Not tainted 6.9.0-rc6-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+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_acquire_returned+0x97/0x790 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:166 [inline] stack_map_get_build_id_offset+0x5df/0x7d0 kernel/bpf/stackmap.c:141 __bpf_get_stack+0x6bf/0x700 kernel/bpf/stackmap.c:449 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1985 [inline] bpf_get_stack_raw_tp+0x124/0x160 kernel/trace/bpf_trace.c:1975 ___bpf_prog_run+0x3e51/0xabd0 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 __bpf_trace_workqueue_queue_work+0x101/0x140 include/trace/events/workqueue.h:23 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline] __queue_work+0x627/0x1020 kernel/workqueue.c:2382 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1839 [inline] __run_timers+0x567/0xaf0 kernel/time/timer.c:2418 __run_timer_base kernel/time/timer.c:2429 [inline] __run_timer_base kernel/time/timer.c:2422 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2438 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2448 __do_softirq+0x218/0x922 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0x784/0x23a0 arch/x86/kernel/unwind_orc.c:581 Code: 95 c0 84 c1 0f 85 86 18 00 00 4d 0f bf 2c 24 4d 01 fd e8 ef a6 50 00 41 0f b6 7c 24 05 48 c7 c6 20 ce 09 8b 41 89 ff 83 e7 07 17 a2 50 00 41 83 e7 07 41 80 ff 03 0f 84 b7 0b 00 00 41 80 ff RSP: 0018:ffffc9000343f138 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffc9000343f1b8 RCX: 0000000000000001 RDX: ffff888028b31e00 RSI: ffffffff8b09ce20 RDI: 0000000000000002 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000009 R10: 0000000000000005 R11: 0000000000000003 R12: ffffffff903e663e R13: ffffc9000343f730 R14: ffffffff903e6642 R15: 0000000000000002 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:624 kernfs_new_node+0x186/0x240 fs/kernfs/dir.c:700 kernfs_create_dir_ns+0x4c/0x150 fs/kernfs/dir.c:1061 internal_create_group+0x34b/0xe50 fs/sysfs/group.c:167 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:220 device_add_groups drivers/base/core.c:2822 [inline] device_add_attrs drivers/base/core.c:2942 [inline] device_add+0xf70/0x1ab0 drivers/base/core.c:3674 netdev_register_kobject+0x187/0x3f0 net/core/net-sysfs.c:2136 register_netdevice+0x12c8/0x1ca0 net/core/dev.c:10283 __ip_tunnel_create+0x4af/0x690 net/ipv4/ip_tunnel.c:266 ip_tunnel_init_net+0x237/0x5f0 net/ipv4/ip_tunnel.c:1117 ops_init+0xb9/0x650 net/core/net_namespace.c:136 setup_net+0x435/0xb40 net/core/net_namespace.c:340 copy_net_ns+0x2f0/0x670 net/core/net_namespace.c:505 create_new_namespaces+0x3ea/0xb10 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x419/0x970 kernel/fork.c:3323 __do_sys_unshare kernel/fork.c:3394 [inline] __se_sys_unshare kernel/fork.c:3392 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f33e927f607 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffe01129a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f33e927f607 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007ffe01129ae0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffe0112a0c8 R13: 0000000000000003 R14: 00007f33e93ac9d8 R15: 000000000000000c ---------------- Code disassembly (best guess): 0: 95 xchg %eax,%ebp 1: c0 84 c1 0f 85 86 18 rolb $0x0,0x1886850f(%rcx,%rax,8) 8: 00 9: 00 4d 0f add %cl,0xf(%rbp) c: bf 2c 24 4d 01 mov $0x14d242c,%edi 11: fd std 12: e8 ef a6 50 00 call 0x50a706 17: 41 0f b6 7c 24 05 movzbl 0x5(%r12),%edi 1d: 48 c7 c6 20 ce 09 8b mov $0xffffffff8b09ce20,%rsi 24: 41 89 ff mov %edi,%r15d 27: 83 e7 07 and $0x7,%edi * 2a: e8 17 a2 50 00 call 0x50a246 <-- trapping instruction 2f: 41 83 e7 07 and $0x7,%r15d 33: 41 80 ff 03 cmp $0x3,%r15b 37: 0f 84 b7 0b 00 00 je 0xbf4 3d: 41 rex.B 3e: 80 .byte 0x80 3f: ff .byte 0xff