With a socket in the sockmap, if there's a parser callback installed
and the verdict callback returns SK_PASS, the kernel deadlocks
immediately after the verdict callback is run. This started at commit
6648e613226e18897231ab5e42ffc29e63fa3365 ("bpf, skmsg: Fix NULL
pointer dereference in sk_psock_skb_ingress_enqueue").
It can be reproduced by running ./test_sockmap -t ping
--txmsg_pass_skb. The --txmsg_pass_skb command to test_sockmap is
available in this series:
https://lore.kernel.org/netdev/20240606-sockmap-splice-v1-0-4820a2ab14b5@xxxxxxxxxxxxx/.
Lockdep splat below (also attached in case it gets damaged). This is
from an unmodified 6.10.0-rc2, but the problem also exists on latest
mainline and net-next.
============================================
WARNING: possible recursive locking detected
6.10.0-rc2 #59 Not tainted
--------------------------------------------
test_sockmap/342 is trying to acquire lock:
ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at:
sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467
net/core/skmsg.c:555)
but task is already holding lock:
ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at:
sk_psock_strp_data_ready (net/core/skmsg.c:1120)
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(clock-AF_INET);
lock(clock-AF_INET);
*** DEADLOCK ***
May be due to missing lock nesting notation
9 locks held by test_sockmap/342:
#0: ffff888007a85818 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg
(net/ipv4/tcp.c:1348)
#1: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit
(./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781
net/ipv4/ip_output.c:470)
#2: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at:
ip_finish_output2 (./include/linux/rcupdate.h:329
./include/linux/rcupdate.h:781 net/ipv4/ip_output.c:228)
#3: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: process_backlog
(./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781
net/core/dev.c:6066)
#4: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at:
ip_local_deliver_finish (./include/linux/rcupdate.h:329
./include/linux/rcupdate.h:781 net/ipv4/ip_input.c:232)
#5: ffff888007a87018 (slock-AF_INET/1){+.-.}-{2:2}, at: tcp_v4_rcv
(./include/linux/skbuff.h:1640 ./include/net/tcp.h:2510
net/ipv4/tcp_ipv4.c:2342)
#6: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at:
sk_psock_strp_data_ready (./include/linux/rcupdate.h:329
./include/linux/rcupdate.h:781 net/core/skmsg.c:1113)
#7: ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at:
sk_psock_strp_data_ready (net/core/skmsg.c:1120)
#8: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at:
sk_psock_strp_read (./include/linux/rcupdate.h:329
./include/linux/rcupdate.h:781 net/core/skmsg.c:1062)
stack backtrace:
CPU: 0 PID: 342 Comm: test_sockmap Not tainted 6.10.0-rc2 #59
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Call Trace:
<IRQ>
dump_stack_lvl (lib/dump_stack.c:118)
__lock_acquire (kernel/locking/lockdep.c:3858 kernel/locking/lockdep.c:5137)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? tcp_rcv_established (./include/linux/skbuff.h:2097
./include/net/tcp.h:2026 ./include/net/tcp.h:2099
net/ipv4/tcp_input.c:5660 net/ipv4/tcp_input.c:6179)
? tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2345)
? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8))
? ip_local_deliver_finish (./include/linux/rcupdate.h:810
net/ipv4/ip_input.c:234)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
lock_acquire (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467
net/core/skmsg.c:555)
? __pfx_lock_acquire (kernel/locking/lockdep.c:5722)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? mark_held_locks (kernel/locking/lockdep.c:4274)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:466
net/core/skmsg.c:555)
_raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177
kernel/locking/spinlock.c:252)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467
net/core/skmsg.c:555)
sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467
net/core/skmsg.c:555)
sk_psock_skb_ingress_self (net/core/skmsg.c:607)
sk_psock_verdict_apply (net/core/skmsg.c:1008)
sk_psock_strp_read (./include/linux/rcupdate.h:810 net/core/skmsg.c:1081)
? sk_psock_strp_parse (net/core/skmsg.c:1104)
__strp_recv (net/strparser/strparser.c:301 (discriminator 3))
tcp_read_sock (net/ipv4/tcp.c:1583)
? __pfx_strp_recv (net/strparser/strparser.c:332)
? __pfx_tcp_read_sock (net/ipv4/tcp.c:1560)
? lock_acquire (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
strp_read_sock (net/strparser/strparser.c:358)
? __pfx_strp_read_sock (net/strparser/strparser.c:346)
? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209)
? lock_is_held_type (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5826)
strp_data_ready (net/strparser/strparser.c:388 net/strparser/strparser.c:366)
sk_psock_strp_data_ready (net/core/skmsg.c:1121)
tcp_data_queue (net/ipv4/tcp_input.c:5234)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_tcp_data_queue (net/ipv4/tcp_input.c:5148)
? __pfx_tcp_urg (net/ipv4/tcp_input.c:5820)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94
arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86)
? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4)
kernel/time/timekeeping.c:395 (discriminator 4)
kernel/time/timekeeping.c:403 (discriminator 4)
kernel/time/timekeeping.c:850 (discriminator 4))
tcp_rcv_established (./include/linux/skbuff.h:2097
./include/net/tcp.h:2026 ./include/net/tcp.h:2099
net/ipv4/tcp_input.c:5660 net/ipv4/tcp_input.c:6179)
? __pfx_lock_acquire (kernel/locking/lockdep.c:5722)
? __pfx_tcp_inbound_hash.constprop.0 (./include/net/tcp.h:2800)
? __pfx_tcp_rcv_established (net/ipv4/tcp_input.c:6006)
? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107
./include/linux/atomic/atomic-arch-fallback.h:2170
./include/linux/atomic/atomic-instrumented.h:1302
./include/asm-generic/qspinlock.h:111
kernel/locking/spinlock_debug.c:116)
tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1956)
tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2345)
? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2172)
? __pfx_raw_local_deliver (net/ipv4/raw.c:201)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? lock_is_held_type (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5826)
ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8))
ip_local_deliver_finish (./include/linux/rcupdate.h:810
net/ipv4/ip_input.c:234)
ip_local_deliver (./include/linux/netfilter.h:314
./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254)
? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243)
? lock_is_held_type (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5826)
? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383
./include/linux/netdevice.h:2577 net/ipv4/ip_input.c:372)
ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449
./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308
net/ipv4/ip_input.c:569)
? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
? lock_acquire (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? lock_acquire (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
__netif_receive_skb_one_core (net/core/dev.c:5624 (discriminator 4))
? __pfx___netif_receive_skb_one_core (net/core/dev.c:5617)
? mark_held_locks (kernel/locking/lockdep.c:4274)
process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6068)
__napi_poll.constprop.0 (net/core/dev.c:6721)
net_rx_action (net/core/dev.c:6792 net/core/dev.c:6906)
? __pfx_net_rx_action (net/core/dev.c:6870)
? __pfx_rcu_core (kernel/rcu/tree.c:2756)
? mark_held_locks (kernel/locking/lockdep.c:4274)
? __dev_queue_xmit (./include/linux/rcupdate.h:339
./include/linux/rcupdate.h:849 net/core/dev.c:4420)
handle_softirqs (kernel/softirq.c:554)
? __dev_queue_xmit (./include/linux/rcupdate.h:339
./include/linux/rcupdate.h:849 net/core/dev.c:4420)
do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
</IRQ>
<TASK>
__local_bh_enable_ip (kernel/softirq.c:382)
? __dev_queue_xmit (./include/linux/rcupdate.h:339
./include/linux/rcupdate.h:849 net/core/dev.c:4420)
__dev_queue_xmit (net/core/dev.c:4421)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
? __pfx___dev_queue_xmit (net/core/dev.c:4302)
? find_held_lock (kernel/locking/lockdep.c:5244)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? mark_held_locks (kernel/locking/lockdep.c:4274)
ip_finish_output2 (./include/linux/netdevice.h:3095
./include/net/neighbour.h:526 ./include/net/neighbour.h:540
net/ipv4/ip_output.c:235)
? __pfx_nf_hook (./include/linux/netfilter.h:227)
? lock_acquire (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199)
? ip_skb_dst_mtu (./include/net/net_namespace.h:383
./include/linux/netdevice.h:2577 ./include/net/ip.h:465
./include/net/ip.h:502)
? __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4))
__ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4))
? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4)
./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4)
./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4)
net/core/skbuff.c:1576 (discriminator 4))
__tcp_transmit_skb (net/ipv4/tcp_output.c:1466 (discriminator 4))
? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1287)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? ktime_get (./arch/x86/include/asm/irqflags.h:42
./arch/x86/include/asm/irqflags.h:77
./arch/x86/include/asm/irqflags.h:135 ./include/linux/seqlock.h:74
kernel/time/timekeeping.c:848)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
tcp_write_xmit (net/ipv4/tcp_output.c:2829)
? __pfx_mem_cgroup_charge_skmem (mm/memcontrol.c:7886)
? skb_page_frag_refill (net/core/sock.c:2920 net/core/sock.c:2904)
__tcp_push_pending_frames (net/ipv4/tcp_output.c:3014)
tcp_sendmsg_locked (net/ipv4/tcp.c:1316)
? print_usage_bug.part.0 (kernel/locking/lockdep.c:3980)
? __pfx_tcp_sendmsg_locked (net/ipv4/tcp.c:1046)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42
./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
tcp_sendmsg (net/ipv4/tcp.c:1349)
__sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2192)
? __pfx___sys_sendto (net/socket.c:2162)
? lock_is_held_type (kernel/locking/lockdep.c:467
kernel/locking/lockdep.c:5826)
? fd_install (./arch/x86/include/asm/preempt.h:103
./include/linux/rcupdate.h:896 fs/file.c:631)
? __sys_accept4 (./include/linux/file.h:47 net/socket.c:2002)
? __pfx___sys_accept4 (net/socket.c:1994)
? handle_mm_fault (./include/linux/memcontrol.h:1078
./include/linux/memcontrol.h:1066 mm/memory.c:5557 mm/memory.c:5704)
__x64_sys_sendto (net/socket.c:2200)
? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42
./arch/x86/include/asm/irqflags.h:77
./include/linux/entry-common.h:197 arch/x86/entry/common.c:79)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
============================================
WARNING: possible recursive locking detected
6.10.0-rc2 #59 Not tainted
--------------------------------------------
test_sockmap/342 is trying to acquire lock:
ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at: sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467 net/core/skmsg.c:555)
but task is already holding lock:
ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at: sk_psock_strp_data_ready (net/core/skmsg.c:1120)
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(clock-AF_INET);
lock(clock-AF_INET);
*** DEADLOCK ***
May be due to missing lock nesting notation
9 locks held by test_sockmap/342:
#0: ffff888007a85818 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg (net/ipv4/tcp.c:1348)
#1: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/ipv4/ip_output.c:470)
#2: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2 (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/ipv4/ip_output.c:228)
#3: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6066)
#4: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/ipv4/ip_input.c:232)
#5: ffff888007a87018 (slock-AF_INET/1){+.-.}-{2:2}, at: tcp_v4_rcv (./include/linux/skbuff.h:1640 ./include/net/tcp.h:2510 net/ipv4/tcp_ipv4.c:2342)
#6: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: sk_psock_strp_data_ready (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/skmsg.c:1113)
#7: ffff888007a87228 (clock-AF_INET){++--}-{2:2}, at: sk_psock_strp_data_ready (net/core/skmsg.c:1120)
#8: ffffffffb8849c00 (rcu_read_lock){....}-{1:2}, at: sk_psock_strp_read (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/skmsg.c:1062)
stack backtrace:
CPU: 0 PID: 342 Comm: test_sockmap Not tainted 6.10.0-rc2 #59
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Call Trace:
<IRQ>
dump_stack_lvl (lib/dump_stack.c:118)
__lock_acquire (kernel/locking/lockdep.c:3858 kernel/locking/lockdep.c:5137)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? tcp_rcv_established (./include/linux/skbuff.h:2097 ./include/net/tcp.h:2026 ./include/net/tcp.h:2099 net/ipv4/tcp_input.c:5660 net/ipv4/tcp_input.c:6179)
? tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2345)
? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8))
? ip_local_deliver_finish (./include/linux/rcupdate.h:810 net/ipv4/ip_input.c:234)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467 net/core/skmsg.c:555)
? __pfx_lock_acquire (kernel/locking/lockdep.c:5722)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? mark_held_locks (kernel/locking/lockdep.c:4274)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:466 net/core/skmsg.c:555)
_raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252)
? sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467 net/core/skmsg.c:555)
sk_psock_skb_ingress_enqueue (./include/linux/skmsg.h:467 net/core/skmsg.c:555)
sk_psock_skb_ingress_self (net/core/skmsg.c:607)
sk_psock_verdict_apply (net/core/skmsg.c:1008)
sk_psock_strp_read (./include/linux/rcupdate.h:810 net/core/skmsg.c:1081)
? sk_psock_strp_parse (net/core/skmsg.c:1104)
__strp_recv (net/strparser/strparser.c:301 (discriminator 3))
tcp_read_sock (net/ipv4/tcp.c:1583)
? __pfx_strp_recv (net/strparser/strparser.c:332)
? __pfx_tcp_read_sock (net/ipv4/tcp.c:1560)
? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
strp_read_sock (net/strparser/strparser.c:358)
? __pfx_strp_read_sock (net/strparser/strparser.c:346)
? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209)
? lock_is_held_type (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5826)
strp_data_ready (net/strparser/strparser.c:388 net/strparser/strparser.c:366)
sk_psock_strp_data_ready (net/core/skmsg.c:1121)
tcp_data_queue (net/ipv4/tcp_input.c:5234)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_tcp_data_queue (net/ipv4/tcp_input.c:5148)
? __pfx_tcp_urg (net/ipv4/tcp_input.c:5820)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86)
? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:395 (discriminator 4) kernel/time/timekeeping.c:403 (discriminator 4) kernel/time/timekeeping.c:850 (discriminator 4))
tcp_rcv_established (./include/linux/skbuff.h:2097 ./include/net/tcp.h:2026 ./include/net/tcp.h:2099 net/ipv4/tcp_input.c:5660 net/ipv4/tcp_input.c:6179)
? __pfx_lock_acquire (kernel/locking/lockdep.c:5722)
? __pfx_tcp_inbound_hash.constprop.0 (./include/net/tcp.h:2800)
? __pfx_tcp_rcv_established (net/ipv4/tcp_input.c:6006)
? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1956)
tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2345)
? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2172)
? __pfx_raw_local_deliver (net/ipv4/raw.c:201)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? lock_is_held_type (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5826)
ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8))
ip_local_deliver_finish (./include/linux/rcupdate.h:810 net/ipv4/ip_input.c:234)
ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254)
? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243)
? lock_is_held_type (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5826)
? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2577 net/ipv4/ip_input.c:372)
ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569)
? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
__netif_receive_skb_one_core (net/core/dev.c:5624 (discriminator 4))
? __pfx___netif_receive_skb_one_core (net/core/dev.c:5617)
? mark_held_locks (kernel/locking/lockdep.c:4274)
process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6068)
__napi_poll.constprop.0 (net/core/dev.c:6721)
net_rx_action (net/core/dev.c:6792 net/core/dev.c:6906)
? __pfx_net_rx_action (net/core/dev.c:6870)
? __pfx_rcu_core (kernel/rcu/tree.c:2756)
? mark_held_locks (kernel/locking/lockdep.c:4274)
? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4420)
handle_softirqs (kernel/softirq.c:554)
? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4420)
do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
</IRQ>
<TASK>
__local_bh_enable_ip (kernel/softirq.c:382)
? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4420)
__dev_queue_xmit (net/core/dev.c:4421)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? __pfx_mark_lock (kernel/locking/lockdep.c:4639)
? __pfx___dev_queue_xmit (net/core/dev.c:4302)
? find_held_lock (kernel/locking/lockdep.c:5244)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? __pfx___lock_acquire (kernel/locking/lockdep.c:4993)
? mark_held_locks (kernel/locking/lockdep.c:4274)
ip_finish_output2 (./include/linux/netdevice.h:3095 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235)
? __pfx_nf_hook (./include/linux/netfilter.h:227)
? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719)
? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199)
? ip_skb_dst_mtu (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2577 ./include/net/ip.h:465 ./include/net/ip.h:502)
? __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4))
__ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4))
? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1576 (discriminator 4))
__tcp_transmit_skb (net/ipv4/tcp_output.c:1466 (discriminator 4))
? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1287)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __pfx_lock_release (kernel/locking/lockdep.c:5762)
? ktime_get (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./arch/x86/include/asm/irqflags.h:135 ./include/linux/seqlock.h:74 kernel/time/timekeeping.c:848)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
tcp_write_xmit (net/ipv4/tcp_output.c:2829)
? __pfx_mem_cgroup_charge_skmem (mm/memcontrol.c:7886)
? skb_page_frag_refill (net/core/sock.c:2920 net/core/sock.c:2904)
__tcp_push_pending_frames (net/ipv4/tcp_output.c:3014)
tcp_sendmsg_locked (net/ipv4/tcp.c:1316)
? print_usage_bug.part.0 (kernel/locking/lockdep.c:3980)
? __pfx_tcp_sendmsg_locked (net/ipv4/tcp.c:1046)
? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5776)
? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387)
tcp_sendmsg (net/ipv4/tcp.c:1349)
__sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2192)
? __pfx___sys_sendto (net/socket.c:2162)
? lock_is_held_type (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5826)
? fd_install (./arch/x86/include/asm/preempt.h:103 ./include/linux/rcupdate.h:896 fs/file.c:631)
? __sys_accept4 (./include/linux/file.h:47 net/socket.c:2002)
? __pfx___sys_accept4 (net/socket.c:1994)
? handle_mm_fault (./include/linux/memcontrol.h:1078 ./include/linux/memcontrol.h:1066 mm/memory.c:5557 mm/memory.c:5704)
__x64_sys_sendto (net/socket.c:2200)
? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/entry-common.h:197 arch/x86/entry/common.c:79)
? lockdep_hardirqs_on (kernel/locking/lockdep.c:4421)
do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
