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SubjectINFO: trying to register non-static key in icmp_send
From
Hello,

syzbot found the following crash on:

HEAD commit: 4aa9fc2a435a Revert "mm, memory_hotplug: initialize struct..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=168581ef400000
kernel config: https://syzkaller.appspot.com/x/.config?x=4fceea9e2d99ac20
dashboard link: https://syzkaller.appspot.com/bug?extid=e1628a5e87492e6f1b76
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=175c96ef400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+e1628a5e87492e6f1b76@syzkaller.appspotmail.com

Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
Enabling of bearer <udp:syz1> rejected, already enabled
turning off the locking correctness validator.
CPU: 1 PID: 3867 Comm: udevd Not tainted 5.0.0-rc4+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
assign_lock_key kernel/locking/lockdep.c:731 [inline]
register_lock_class+0x19dc/0x1e60 kernel/locking/lockdep.c:757
__lock_acquire+0x149/0x4a30 kernel/locking/lockdep.c:3224
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
__raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline]
_raw_spin_trylock+0x62/0x80 kernel/locking/spinlock.c:128
spin_trylock include/linux/spinlock.h:339 [inline]
icmp_xmit_lock net/ipv4/icmp.c:219 [inline]
icmp_send+0x582/0x1bc0 net/ipv4/icmp.c:665
__udp4_lib_rcv+0x23a8/0x3180 net/ipv4/udp.c:2321
Enabling of bearer <udp:syz1> rejected, already enabled
udp_rcv+0x22/0x30 net/ipv4/udp.c:2480
ip_protocol_deliver_rcu+0xb6/0xa20 net/ipv4/ip_input.c:208
Enabling of bearer <udp:syz1> rejected, already enabled
ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip_local_deliver+0x1f0/0x740 net/ipv4/ip_input.c:255
Enabling of bearer <udp:syz1> rejected, already enabled
dst_input include/net/dst.h:450 [inline]
ip_rcv_finish+0x1f4/0x2f0 net/ipv4/ip_input.c:414
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip_rcv+0xed/0x620 net/ipv4/ip_input.c:524
__netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
process_backlog+0x206/0x750 net/core/dev.c:5923
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x76d/0x1930 net/core/dev.c:6412
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x180/0x1d0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
Enabling of bearer <udp:syz1> rejected, already enabled
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766
[inline]
RIP: 0010:lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 64 02 00 00 48 83 3d 66
30 2e 08 00 0f 84 d0 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00
48 b8 00 00 00 00 00 fc ff df 48 03 85 40 ff ff ff
RSP: 0018:ffff888097c57640 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1325046 RBX: ffff888097c4c2c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000eb8 RDI: 0000000000000282
RBP: ffff888097c57710 R08: 0000000000000001 R09: ffff888097c4cb88
R10: ffff888097c4cb68 R11: 0000000000000001 R12: ffff88808954e7b8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:329 [inline]
__d_lookup+0x2b6/0x960 fs/dcache.c:2272
lookup_fast+0x480/0x1260 fs/namei.c:1617
do_last fs/namei.c:3284 [inline]
path_openat+0x4db/0x5650 fs/namei.c:3534
do_filp_open+0x26f/0x370 fs/namei.c:3564
do_sys_open+0x59a/0x7c0 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f902edde120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90
90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff
ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffc8e9d9588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000b35bb0 RCX: 00007f902edde120
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ffc8e9da200
RBP: 0000000000b35360 R08: 000000000041f4f1 R09: 00007f902ee347d0
R10: 7269762f73656369 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000b35bb0 R15: 0000000000b25250
kasan: CONFIG_KASAN_INLINE enabled
Enabling of bearer <udp:syz1> rejected, already enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3867 Comm: udevd Not tainted 5.0.0-rc4+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__ip_append_data.isra.0+0x301/0x3350 net/ipv4/ip_output.c:898
Code: c7 85 64 fe ff ff 00 00 00 00 0f 85 78 15 00 00 e8 d4 c5 f0 fa 48 8b
95 d8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f
85 60 2f 00 00 48 8b 85 d8 fe ff ff 48 8b 18 48 b8
RSP: 0018:ffff8880ae706e38 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86913e0c
RDX: 0000000000000000 RSI: ffffffff86913e8c RDI: 0000000000000001
RBP: ffff8880ae707010 R08: ffff888097c4c2c0 R09: ffffffff86a3da70
R10: ffff8880ae707180 R11: ffff888096919343 R12: ffff88808dba2a70
R13: ffff88808dba2f10 R14: 0000000000000001 R15: dead4ead00000000
FS: 00007f902f6d67a0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb4062fe4 CR3: 00000000981e9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
ip_append_data.part.0+0xf2/0x170 net/ipv4/ip_output.c:1220
Enabling of bearer <udp:syz1> rejected, already enabled
ip_append_data+0x6e/0x90 net/ipv4/ip_output.c:1209
icmp_push_reply+0x189/0x510 net/ipv4/icmp.c:375
Enabling of bearer <udp:syz1> rejected, already enabled
icmp_send+0x1535/0x1bc0 net/ipv4/icmp.c:736
Enabling of bearer <udp:syz1> rejected, already enabled
__udp4_lib_rcv+0x23a8/0x3180 net/ipv4/udp.c:2321
udp_rcv+0x22/0x30 net/ipv4/udp.c:2480
ip_protocol_deliver_rcu+0xb6/0xa20 net/ipv4/ip_input.c:208
Enabling of bearer <udp:syz1> rejected, already enabled
ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip_local_deliver+0x1f0/0x740 net/ipv4/ip_input.c:255
Enabling of bearer <udp:syz1> rejected, already enabled
dst_input include/net/dst.h:450 [inline]
ip_rcv_finish+0x1f4/0x2f0 net/ipv4/ip_input.c:414
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip_rcv+0xed/0x620 net/ipv4/ip_input.c:524
__netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
process_backlog+0x206/0x750 net/core/dev.c:5923
Enabling of bearer <udp:syz1> rejected, already enabled
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x76d/0x1930 net/core/dev.c:6412
Enabling of bearer <udp:syz1> rejected, already enabled
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x180/0x1d0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766
[inline]
RIP: 0010:lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 64 02 00 00 48 83 3d 66
30 2e 08 00 0f 84 d0 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00
48 b8 00 00 00 00 00 fc ff df 48 03 85 40 ff ff ff
RSP: 0018:ffff888097c57640 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1325046 RBX: ffff888097c4c2c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000eb8 RDI: 0000000000000282
RBP: ffff888097c57710 R08: 0000000000000001 R09: ffff888097c4cb88
R10: ffff888097c4cb68 R11: 0000000000000001 R12: ffff88808954e7b8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:329 [inline]
__d_lookup+0x2b6/0x960 fs/dcache.c:2272
lookup_fast+0x480/0x1260 fs/namei.c:1617
do_last fs/namei.c:3284 [inline]
path_openat+0x4db/0x5650 fs/namei.c:3534
do_filp_open+0x26f/0x370 fs/namei.c:3564
do_sys_open+0x59a/0x7c0 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f902edde120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90
90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff
ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffc8e9d9588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000b35bb0 RCX: 00007f902edde120
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ffc8e9da200
RBP: 0000000000b35360 R08: 000000000041f4f1 R09: 00007f902ee347d0
R10: 7269762f73656369 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000b35bb0 R15: 0000000000b25250
Modules linked in:
---[ end trace 6d5f724bc69e6c3e ]---
Enabling of bearer <udp:syz1> rejected, already enabled
RIP: 0010:__ip_append_data.isra.0+0x301/0x3350 net/ipv4/ip_output.c:898
Code: c7 85 64 fe ff ff 00 00 00 00 0f 85 78 15 00 00 e8 d4 c5 f0 fa 48 8b
95 d8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f
85 60 2f 00 00 48 8b 85 d8 fe ff ff 48 8b 18 48 b8
RSP: 0018:ffff8880ae706e38 EFLAGS: 00010246
Enabling of bearer <udp:syz1> rejected, already enabled
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86913e0c
RDX: 0000000000000000 RSI: ffffffff86913e8c RDI: 0000000000000001
RBP: ffff8880ae707010 R08: ffff888097c4c2c0 R09: ffffffff86a3da70
Enabling of bearer <udp:syz1> rejected, already enabled
R10: ffff8880ae707180 R11: ffff888096919343 R12: ffff88808dba2a70
R13: ffff88808dba2f10 R14: 0000000000000001 R15: dead4ead00000000
FS: 00007f902f6d67a0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb4062fe4 CR3: 00000000981e9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

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