[moderation] [net?] BUG: stack guard page was hit in mptcp_sendmsg
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syzbot
Aug 21, 2026, 8:11:32 PM (10 hours ago) Aug 21
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: e6a5d573d24c net: dsa: drop explicit NULL comparisons
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15fe36c6580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f2baeae6059376eb
dashboard link: https://syzkaller.appspot.com/bug?extid=2b120190d9e54ad8c65d
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [da...@davemloft.net edum...@google.com ho...@kernel.org ku...@kernel.org linux-...@vger.kernel.org net...@vger.kernel.org pab...@redhat.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ec03d2a9ef9c/disk-e6a5d573.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4d46598728d1/vmlinux-e6a5d573.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cae584a81da1/bzImage-e6a5d573.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2b1201...@syzkaller.appspotmail.com
BUG: TASK stack guard page was hit at ffffc900058affd8 (stack is ffffc900058b0000..ffffc900058b8000)
Oops: stack guard page: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 14460 Comm: syz.2.2242 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__lock_acquire+0x81/0x2cf0 kernel/locking/lockdep.c:-1
Code: c9 44 0f 44 c1 31 ff 48 3d 10 05 31 94 41 0f 45 f8 8b 0d 02 db d5 18 85 c9 0f 95 c0 83 fe 08 0f 92 c2 08 c2 0f 84 4d 01 00 00 <89> 7c 24 08 83 fe 01 77 0c 89 f0 49 8b 44 c3 08 48 85 c0 75 2d 31
RSP: 0018:ffffc900058affe0 EFLAGS: 00010002
RAX: ffffffff9a7cbd00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: 0000000000000002 R14: ffff888023700000 R15: 0000000000000246
FS: 00007f881be196c0(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900058affd8 CR3: 000000003386c000 CR4: 00000000003526f0
Call Trace:
<TASK>
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4584 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x2a0/0x5f0 mm/slub.c:4931
dst_alloc+0x105/0x170 net/core/dst.c:90
rt_dst_alloc net/ipv4/route.c:1681 [inline]
__mkroute_output net/ipv4/route.c:2684 [inline]
ip_route_output_key_hash_rcu+0x14ac/0x2720 net/ipv4/route.c:2904
ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2734
__ip_route_output_key include/net/route.h:169 [inline]
ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2961
ipvlan_process_v4_outbound+0x2f8/0x740 drivers/net/ipvlan/ipvlan_core.c:449
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
__ip_queue_xmit+0x10df/0x1b10 net/ipv4/ip_output.c:533
__tcp_transmit_skb+0x2d18/0x47c0 net/ipv4/tcp_output.c:1717
tcp_transmit_skb net/ipv4/tcp_output.c:1734 [inline]
tcp_send_syn_data net/ipv4/tcp_output.c:4289 [inline]
tcp_connect+0x3515/0x54e0 net/ipv4/tcp_output.c:4382
tcp_v4_connect+0x1051/0x1950 net/ipv4/tcp_ipv4.c:345
mptcp_connect+0x4d3/0x7a0 net/mptcp/protocol.c:4172
__inet_stream_connect+0x258/0xe00 net/ipv4/af_inet.c:684
tcp_sendmsg_fastopen+0x3af/0x5f0 net/ipv4/tcp.c:1085
mptcp_sendmsg_fastopen+0x17b/0x540 net/mptcp/protocol.c:1907
mptcp_sendmsg+0x1a69/0x1d10 net/mptcp/protocol.c:2008
sock_sendmsg_nosec+0x10e/0x180 net/socket.c:776
__sock_sendmsg net/socket.c:790 [inline]
____sys_sendmsg+0x54e/0x850 net/socket.c:2684
___sys_sendmsg+0x2a5/0x360 net/socket.c:2738
__sys_sendmsg net/socket.c:2770 [inline]
__do_sys_sendmsg net/socket.c:2775 [inline]
__se_sys_sendmsg net/socket.c:2773 [inline]
__x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f881af9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f881be19028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f881b225fa0 RCX: 00007f881af9e0d9
RDX: 0000000030004001 RSI: 0000200000000100 RDI: 0000000000000007
RBP: 00007f881b035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f881b226038 R14: 00007f881b225fa0 R15: 00007ffc7eab04a8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x81/0x2cf0 kernel/locking/lockdep.c:-1
Code: c9 44 0f 44 c1 31 ff 48 3d 10 05 31 94 41 0f 45 f8 8b 0d 02 db d5 18 85 c9 0f 95 c0 83 fe 08 0f 92 c2 08 c2 0f 84 4d 01 00 00 <89> 7c 24 08 83 fe 01 77 0c 89 f0 49 8b 44 c3 08 48 85 c0 75 2d 31
RSP: 0018:ffffc900058affe0 EFLAGS: 00010002
RAX: ffffffff9a7cbd00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: 0000000000000002 R14: ffff888023700000 R15: 0000000000000246
FS: 00007f881be196c0(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900058affd8 CR3: 000000003386c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: c9 leave
1: 44 0f 44 c1 cmove %ecx,%r8d
5: 31 ff xor %edi,%edi
7: 48 3d 10 05 31 94 cmp $0xffffffff94310510,%rax
d: 41 0f 45 f8 cmovne %r8d,%edi
11: 8b 0d 02 db d5 18 mov 0x18d5db02(%rip),%ecx # 0x18d5db19
17: 85 c9 test %ecx,%ecx
19: 0f 95 c0 setne %al
1c: 83 fe 08 cmp $0x8,%esi
1f: 0f 92 c2 setb %dl
22: 08 c2 or %al,%dl
24: 0f 84 4d 01 00 00 je 0x177
* 2a: 89 7c 24 08 mov %edi,0x8(%rsp) <-- trapping instruction
2e: 83 fe 01 cmp $0x1,%esi
31: 77 0c ja 0x3f
33: 89 f0 mov %esi,%eax
35: 49 8b 44 c3 08 mov 0x8(%r11,%rax,8),%rax
3a: 48 85 c0 test %rax,%rax
3d: 75 2d jne 0x6c
3f: 31 .byte 0x31
---
This report is generated by a bot. It may contain errors.
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syzbot found the following issue on:
HEAD commit: e6a5d573d24c net: dsa: drop explicit NULL comparisons
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15fe36c6580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f2baeae6059376eb
dashboard link: https://syzkaller.appspot.com/bug?extid=2b120190d9e54ad8c65d
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [da...@davemloft.net edum...@google.com ho...@kernel.org ku...@kernel.org linux-...@vger.kernel.org net...@vger.kernel.org pab...@redhat.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ec03d2a9ef9c/disk-e6a5d573.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4d46598728d1/vmlinux-e6a5d573.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cae584a81da1/bzImage-e6a5d573.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2b1201...@syzkaller.appspotmail.com
BUG: TASK stack guard page was hit at ffffc900058affd8 (stack is ffffc900058b0000..ffffc900058b8000)
Oops: stack guard page: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 14460 Comm: syz.2.2242 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__lock_acquire+0x81/0x2cf0 kernel/locking/lockdep.c:-1
Code: c9 44 0f 44 c1 31 ff 48 3d 10 05 31 94 41 0f 45 f8 8b 0d 02 db d5 18 85 c9 0f 95 c0 83 fe 08 0f 92 c2 08 c2 0f 84 4d 01 00 00 <89> 7c 24 08 83 fe 01 77 0c 89 f0 49 8b 44 c3 08 48 85 c0 75 2d 31
RSP: 0018:ffffc900058affe0 EFLAGS: 00010002
RAX: ffffffff9a7cbd00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: 0000000000000002 R14: ffff888023700000 R15: 0000000000000246
FS: 00007f881be196c0(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900058affd8 CR3: 000000003386c000 CR4: 00000000003526f0
Call Trace:
<TASK>
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4584 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x2a0/0x5f0 mm/slub.c:4931
dst_alloc+0x105/0x170 net/core/dst.c:90
rt_dst_alloc net/ipv4/route.c:1681 [inline]
__mkroute_output net/ipv4/route.c:2684 [inline]
ip_route_output_key_hash_rcu+0x14ac/0x2720 net/ipv4/route.c:2904
ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2734
__ip_route_output_key include/net/route.h:169 [inline]
ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2961
ipvlan_process_v4_outbound+0x2f8/0x740 drivers/net/ipvlan/ipvlan_core.c:449
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
ipvlan_process_v4_outbound+0x448/0x740 drivers/net/ipvlan/ipvlan_core.c:461
ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:565 [inline]
ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:627 [inline]
ipvlan_queue_xmit+0xabf/0x16b0 drivers/net/ipvlan/ipvlan_core.c:693
ipvlan_start_xmit+0x4a/0x130 drivers/net/ipvlan/ipvlan_main.c:280
__netdev_start_xmit include/linux/netdevice.h:5424 [inline]
netdev_start_xmit include/linux/netdevice.h:5433 [inline]
xmit_one net/core/dev.c:3914 [inline]
dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903
dev_queue_xmit include/linux/netdevice.h:3456 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xbda/0x10b0 net/ipv4/ip_output.c:236
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:471 [inline]
NF_HOOK+0x605/0x660 include/linux/netfilter.h:325
ip_vs_nat_send_or_cont+0x69c/0x8d0 net/netfilter/ipvs/ip_vs_xmit.c:688
ip_vs_nat_xmit+0x76a/0xb40 net/netfilter/ipvs/ip_vs_xmit.c:860
ip_vs_in_hook+0xe02/0x1c90 net/netfilter/ipvs/ip_vs_core.c:2254
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook+0x22a/0x3a0 include/linux/netfilter.h:280
__ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
__ip_queue_xmit+0x10df/0x1b10 net/ipv4/ip_output.c:533
__tcp_transmit_skb+0x2d18/0x47c0 net/ipv4/tcp_output.c:1717
tcp_transmit_skb net/ipv4/tcp_output.c:1734 [inline]
tcp_send_syn_data net/ipv4/tcp_output.c:4289 [inline]
tcp_connect+0x3515/0x54e0 net/ipv4/tcp_output.c:4382
tcp_v4_connect+0x1051/0x1950 net/ipv4/tcp_ipv4.c:345
mptcp_connect+0x4d3/0x7a0 net/mptcp/protocol.c:4172
__inet_stream_connect+0x258/0xe00 net/ipv4/af_inet.c:684
tcp_sendmsg_fastopen+0x3af/0x5f0 net/ipv4/tcp.c:1085
mptcp_sendmsg_fastopen+0x17b/0x540 net/mptcp/protocol.c:1907
mptcp_sendmsg+0x1a69/0x1d10 net/mptcp/protocol.c:2008
sock_sendmsg_nosec+0x10e/0x180 net/socket.c:776
__sock_sendmsg net/socket.c:790 [inline]
____sys_sendmsg+0x54e/0x850 net/socket.c:2684
___sys_sendmsg+0x2a5/0x360 net/socket.c:2738
__sys_sendmsg net/socket.c:2770 [inline]
__do_sys_sendmsg net/socket.c:2775 [inline]
__se_sys_sendmsg net/socket.c:2773 [inline]
__x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f881af9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f881be19028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f881b225fa0 RCX: 00007f881af9e0d9
RDX: 0000000030004001 RSI: 0000200000000100 RDI: 0000000000000007
RBP: 00007f881b035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f881b226038 R14: 00007f881b225fa0 R15: 00007ffc7eab04a8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x81/0x2cf0 kernel/locking/lockdep.c:-1
Code: c9 44 0f 44 c1 31 ff 48 3d 10 05 31 94 41 0f 45 f8 8b 0d 02 db d5 18 85 c9 0f 95 c0 83 fe 08 0f 92 c2 08 c2 0f 84 4d 01 00 00 <89> 7c 24 08 83 fe 01 77 0c 89 f0 49 8b 44 c3 08 48 85 c0 75 2d 31
RSP: 0018:ffffc900058affe0 EFLAGS: 00010002
RAX: ffffffff9a7cbd00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: 0000000000000002 R14: ffff888023700000 R15: 0000000000000246
FS: 00007f881be196c0(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900058affd8 CR3: 000000003386c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: c9 leave
1: 44 0f 44 c1 cmove %ecx,%r8d
5: 31 ff xor %edi,%edi
7: 48 3d 10 05 31 94 cmp $0xffffffff94310510,%rax
d: 41 0f 45 f8 cmovne %r8d,%edi
11: 8b 0d 02 db d5 18 mov 0x18d5db02(%rip),%ecx # 0x18d5db19
17: 85 c9 test %ecx,%ecx
19: 0f 95 c0 setne %al
1c: 83 fe 08 cmp $0x8,%esi
1f: 0f 92 c2 setb %dl
22: 08 c2 or %al,%dl
24: 0f 84 4d 01 00 00 je 0x177
* 2a: 89 7c 24 08 mov %edi,0x8(%rsp) <-- trapping instruction
2e: 83 fe 01 cmp $0x1,%esi
31: 77 0c ja 0x3f
33: 89 f0 mov %esi,%eax
35: 49 8b 44 c3 08 mov 0x8(%r11,%rax,8),%rax
3a: 48 85 c0 test %rax,%rax
3d: 75 2d jne 0x6c
3f: 31 .byte 0x31
---
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