================================ WARNING: inconsistent lock state 5.16.0-rc4-next-20211210-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.5/30930 [HC0[0]:SC1[7]:HE1:SE0] takes: ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: might_alloc include/linux/sched/mm.h:253 [inline] ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_pre_alloc_hook mm/slab.h:739 [inline] ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_alloc_node mm/slub.c:3145 [inline] ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_alloc mm/slub.c:3239 [inline] ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __fs_reclaim_acquire mm/page_alloc.c:4550 [inline] fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4564 might_alloc include/linux/sched/mm.h:253 [inline] slab_pre_alloc_hook mm/slab.h:739 [inline] slab_alloc_node mm/slub.c:3145 [inline] slab_alloc mm/slub.c:3239 [inline] kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:715 [inline] alloc_workqueue_attrs+0x38/0x80 kernel/workqueue.c:3405 wq_numa_init kernel/workqueue.c:5972 [inline] workqueue_init+0x12f/0x9e3 kernel/workqueue.c:6099 kernel_init_freeable+0x3fb/0x73a init/main.c:1602 kernel_init+0x1a/0x1d0 init/main.c:1507 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 irq event stamp: 6918 hardirqs last enabled at (6918): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 hardirqs last disabled at (6917): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (266): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (266): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 softirqs last disabled at (2583): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (2583): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(fs_reclaim); lock(fs_reclaim); *** DEADLOCK *** 8 locks held by syz-executor.5/30930: #0: ffffc90000dc0d70 ((&ndev->rs_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:35 [inline] #0: ffffc90000dc0d70 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1411 #1: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_nd_hdr net/ipv6/ndisc.c:466 [inline] #1: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ndisc_send_skb+0x84b/0x17f0 net/ipv6/ndisc.c:502 #2: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: lwtunnel_xmit_redirect include/net/lwtunnel.h:95 [inline] #2: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: ip6_finish_output2+0x2ad/0x14f0 net/ipv6/ip6_output.c:112 #3: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x1e3/0x3640 net/core/dev.c:4036 #4: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: geneve_xmit+0xde/0x3530 drivers/net/geneve.c:1068 #5: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_route_output_flags+0x0/0x320 net/ipv6/route.c:778 #6: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_pol_route+0x156/0x11e0 net/ipv6/route.c:2217 #7: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: rt6_probe net/ipv6/route.c:632 [inline] #7: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: find_match.part.0+0x35a/0xd00 net/ipv6/route.c:752 stack backtrace: CPU: 1 PID: 30930 Comm: syz-executor.5 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:203 [inline] valid_state kernel/locking/lockdep.c:3945 [inline] mark_lock_irq kernel/locking/lockdep.c:4148 [inline] mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4605 mark_usage kernel/locking/lockdep.c:4500 [inline] __lock_acquire+0x11d5/0x54a0 kernel/locking/lockdep.c:4981 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __fs_reclaim_acquire mm/page_alloc.c:4550 [inline] fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4564 might_alloc include/linux/sched/mm.h:253 [inline] slab_pre_alloc_hook mm/slab.h:739 [inline] slab_alloc_node mm/slub.c:3145 [inline] slab_alloc mm/slub.c:3239 [inline] kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:715 [inline] ref_tracker_alloc+0xe1/0x430 lib/ref_tracker.c:74 netdev_tracker_alloc include/linux/netdevice.h:3860 [inline] dev_hold_track include/linux/netdevice.h:3877 [inline] rt6_probe net/ipv6/route.c:661 [inline] find_match.part.0+0xac9/0xd00 net/ipv6/route.c:752 find_match net/ipv6/route.c:825 [inline] __find_rr_leaf+0x17f/0xd20 net/ipv6/route.c:826 find_rr_leaf net/ipv6/route.c:847 [inline] rt6_select net/ipv6/route.c:891 [inline] fib6_table_lookup+0x649/0xa20 net/ipv6/route.c:2185 ip6_pol_route+0x1c5/0x11e0 net/ipv6/route.c:2221 pol_lookup_func include/net/ip6_fib.h:580 [inline] fib6_rule_lookup+0x52a/0x6f0 net/ipv6/fib6_rules.c:120 ip6_route_output_flags_noref+0x2e2/0x380 net/ipv6/route.c:2629 ip6_route_output_flags+0x72/0x320 net/ipv6/route.c:2642 ip6_route_output include/net/ip6_route.h:98 [inline] ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1070 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1200 geneve_get_v6_dst+0x46f/0x9a0 drivers/net/geneve.c:858 geneve6_xmit_skb drivers/net/geneve.c:991 [inline] geneve_xmit+0x520/0x3530 drivers/net/geneve.c:1074 __netdev_start_xmit include/linux/netdevice.h:4685 [inline] netdev_start_xmit include/linux/netdevice.h:4699 [inline] xmit_one net/core/dev.c:3473 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489 __dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4112 neigh_resolve_output net/core/neighbour.c:1522 [inline] neigh_resolve_output+0x50e/0x820 net/core/neighbour.c:1502 neigh_output include/net/neighbour.h:541 [inline] ip6_finish_output2+0x56e/0x14f0 net/ipv6/ip6_output.c:126 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline] __ip6_finish_output+0x61e/0xe80 net/ipv6/ip6_output.c:170 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6711 Code: 55 53 65 48 8b 1c 25 40 70 02 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 e2 71 fa f7 e8 fd 8f 28 f8 fb bf 01 00 00 00 c2 a4 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 10 61 fa RSP: 0000:ffffc9000490fe68 EFLAGS: 00000202 RAX: 0000000000000a13 RBX: ffff888078c19d40 RCX: 1ffffffff1b24771 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed100f1833a8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e4478 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:162 [inline] RIP: 0010:exit_to_user_mode_prepare+0x143/0x290 kernel/entry/common.c:207 Code: 14 01 00 00 e8 8e 2f ee 07 65 48 8b 04 25 40 70 02 00 48 8b 18 f7 c3 0e 30 02 00 0f 84 03 ff ff ff e8 91 7b 18 00 fb f6 c3 08 <74> ba e8 e6 dd ef 07 f6 c7 10 74 b5 48 89 ef e8 a9 7f 36 00 f7 c3 RSP: 0000:ffffc9000490ff30 EFLAGS: 00000202 RAX: 0000000000000a07 RBX: 0000000000000008 RCX: 1ffffffff1b24771 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000490ff58 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e4478 R11: 0000000000000001 R12: ffff888078c19d40 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0033:0x7f2b62629e99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2b60f9f218 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f2b6273cf68 RCX: 00007f2b62629e99 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2b6273cf68 RBP: 00007f2b6273cf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b6273cf6c R13: 00007fffbed6c8bf R14: 00007f2b60f9f300 R15: 0000000000022000 BUG: sleeping function called from invalid context at include/linux/sched/mm.h:256 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 30930, name: syz-executor.5 preempt_count: 701, expected: 0 RCU nest depth: 4, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] preempt_schedule_irq+0x3e/0x90 kernel/sched/core.c:6709 CPU: 1 PID: 30930 Comm: syz-executor.5 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9583 might_alloc include/linux/sched/mm.h:256 [inline] slab_pre_alloc_hook mm/slab.h:739 [inline] slab_alloc_node mm/slub.c:3145 [inline] slab_alloc mm/slub.c:3239 [inline] kmem_cache_alloc_trace+0x25d/0x2c0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:715 [inline] ref_tracker_alloc+0xe1/0x430 lib/ref_tracker.c:74 netdev_tracker_alloc include/linux/netdevice.h:3860 [inline] dev_hold_track include/linux/netdevice.h:3877 [inline] rt6_probe net/ipv6/route.c:661 [inline] find_match.part.0+0xac9/0xd00 net/ipv6/route.c:752 find_match net/ipv6/route.c:825 [inline] __find_rr_leaf+0x17f/0xd20 net/ipv6/route.c:826 find_rr_leaf net/ipv6/route.c:847 [inline] rt6_select net/ipv6/route.c:891 [inline] fib6_table_lookup+0x649/0xa20 net/ipv6/route.c:2185 ip6_pol_route+0x1c5/0x11e0 net/ipv6/route.c:2221 pol_lookup_func include/net/ip6_fib.h:580 [inline] fib6_rule_lookup+0x52a/0x6f0 net/ipv6/fib6_rules.c:120 ip6_route_output_flags_noref+0x2e2/0x380 net/ipv6/route.c:2629 ip6_route_output_flags+0x72/0x320 net/ipv6/route.c:2642 ip6_route_output include/net/ip6_route.h:98 [inline] ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1070 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1200 geneve_get_v6_dst+0x46f/0x9a0 drivers/net/geneve.c:858 geneve6_xmit_skb drivers/net/geneve.c:991 [inline] geneve_xmit+0x520/0x3530 drivers/net/geneve.c:1074 __netdev_start_xmit include/linux/netdevice.h:4685 [inline] netdev_start_xmit include/linux/netdevice.h:4699 [inline] xmit_one net/core/dev.c:3473 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489 __dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4112 neigh_resolve_output net/core/neighbour.c:1522 [inline] neigh_resolve_output+0x50e/0x820 net/core/neighbour.c:1502 neigh_output include/net/neighbour.h:541 [inline] ip6_finish_output2+0x56e/0x14f0 net/ipv6/ip6_output.c:126 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline] __ip6_finish_output+0x61e/0xe80 net/ipv6/ip6_output.c:170 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6711 Code: 55 53 65 48 8b 1c 25 40 70 02 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 e2 71 fa f7 e8 fd 8f 28 f8 fb bf 01 00 00 00 c2 a4 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 10 61 fa RSP: 0000:ffffc9000490fe68 EFLAGS: 00000202 RAX: 0000000000000a13 RBX: ffff888078c19d40 RCX: 1ffffffff1b24771 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed100f1833a8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e4478 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:162 [inline] RIP: 0010:exit_to_user_mode_prepare+0x143/0x290 kernel/entry/common.c:207 Code: 14 01 00 00 e8 8e 2f ee 07 65 48 8b 04 25 40 70 02 00 48 8b 18 f7 c3 0e 30 02 00 0f 84 03 ff ff ff e8 91 7b 18 00 fb f6 c3 08 <74> ba e8 e6 dd ef 07 f6 c7 10 74 b5 48 89 ef e8 a9 7f 36 00 f7 c3 RSP: 0000:ffffc9000490ff30 EFLAGS: 00000202 RAX: 0000000000000a07 RBX: 0000000000000008 RCX: 1ffffffff1b24771 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000490ff58 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e4478 R11: 0000000000000001 R12: ffff888078c19d40 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0033:0x7f2b62629e99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2b60f9f218 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f2b6273cf68 RCX: 00007f2b62629e99 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2b6273cf68 RBP: 00007f2b6273cf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b6273cf6c R13: 00007fffbed6c8bf R14: 00007f2b60f9f300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 53 push %rbx 2: 65 48 8b 1c 25 40 70 mov %gs:0x27040,%rbx 9: 02 00 b: 48 89 dd mov %rbx,%rbp e: 48 c1 ed 03 shr $0x3,%rbp 12: 48 01 c5 add %rax,%rbp 15: bf 01 00 00 00 mov $0x1,%edi 1a: e8 e2 71 fa f7 callq 0xf7fa7201 1f: e8 fd 8f 28 f8 callq 0xf8289021 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 c2 a4 ff ff callq 0xffffa4f1 <-- trapping instruction 2f: 9c pushfq 30: 58 pop %rax 31: fa cli 32: f6 c4 02 test $0x2,%ah 35: 75 27 jne 0x5e 37: bf 01 00 00 00 mov $0x1,%edi 3c: e8 .byte 0xe8 3d: 10 61 fa adc %ah,-0x6(%rcx)