rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 0, t=10502 jiffies, g=234449, q=25)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4295098610-4295088109), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g234449 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:29184 pid: 13 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4324 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5075
schedule+0xcf/0x270 kernel/sched/core.c:5154
schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
rcu_gp_kthread+0xd07/0x2250 kernel/rcu/tree.c:2178
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19728 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pv_wait_node kernel/locking/qspinlock_paravirt.h:301 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x5c4/0xb40 kernel/locking/qspinlock.c:473
Code: 32 84 c0 75 23 41 0f b6 14 24 4c 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 ed 03 00 00 0f b6 53 14 84 d2 0f 85 9e 00 00 00 f3 90 <83> e8 01 0f 84 93 00 00 00 0f b6 16 84 d2 74 09 80 fa 03 0f 8e 96
RSP: 0018:ffffc90000db0a50 EFLAGS: 00000202
RAX: 0000000000002a31 RBX: ffff8880b9c35f40 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffed10173a6be9 RDI: ffff8880b9d35f54
RBP: ffff8880b9d35f54 R08: 0000000000000001 R09: ffff8880b9d35f54
R10: ffffed10173a6bea R11: 0000000000000080 R12: ffffed1017386bea
R13: ffff8880b9c35f54 R14: dffffc0000000000 R15: ffff8880b9d35f40
FS: 00007fed8ff54700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33425000 CR3: 000000007da2a000 CR4: 00000000001506e0
DR0: 0000000000000436 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
spin_lock include/linux/spinlock.h:354 [inline]
mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1514
mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1775
mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1829
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852
__run_hrtimer kernel/time/hrtimer.c:1519 [inline]
__hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
__do_softirq+0x29b/0x9f6 kernel/softirq.c:343
asm_call_irq_on_stack+0xf/0x20
__run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:226 [inline]
__irq_exit_rcu kernel/softirq.c:420 [inline]
irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__schedule+0x0/0x21a0 kernel/sched/core.c:4957
Code: 5b 5d 41 5c c3 e8 00 dc b3 f8 eb d9 e8 f9 db b3 f8 e9 4b ff ff ff e8 8f db b3 f8 e9 02 ff ff ff e8 a5 db b3 f8 e9 6c ff ff ff <55> 48 89 e5 41 57 48 8d 85 78 ff ff ff 41 56 49 c7 c6 80 51 03 00
RSP: 0018:ffffc90001f1ebe0 EFLAGS: 00000206
RAX: 00000000000e3f39 RBX: ffff88801dcb9bc0 RCX: 1ffffffff1f5c642
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed1003b97378 R08: 0000000000000001 R09: ffffffff8fa998a7
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5532
irqentry_exit_cond_resched kernel/entry/common.c:392 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:384 [inline]
irqentry_exit+0x7a/0xa0 kernel/entry/common.c:428
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:35
Code: ff d3 48 c7 44 24 50 00 00 00 00 eb e3 66 0f 1f 44 00 00 31 ed 65 48 8b 04 25 0c a0 00 00 48 8d a0 58 ff ff ff e8 29 a9 43 00 <55> 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 53 16 02 08
RSP: 0018:ffffc90001f1ecb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000246 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff8bf7c5e0 R08: 0000000000000001 R09: ffffffff8fa998a7
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8dc5420c R15: ffffffff8bf7c180
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
_raw_spin_unlock_irqrestore+0x46/0x50 kernel/locking/spinlock.c:191
rcu_report_unblock_qs_rnp kernel/rcu/tree.c:2308 [inline]
rcu_preempt_deferred_qs_irqrestore+0x858/0xb10 kernel/rcu/tree_plugin.h:529
rcu_read_unlock_special kernel/rcu/tree_plugin.h:643 [inline]
__rcu_read_unlock+0x21b/0x500 kernel/rcu/tree_plugin.h:399
rcu_read_unlock include/linux/rcupdate.h:709 [inline]
ip6_dst_lookup_tail+0x51e/0x1740 net/ipv6/ip6_output.c:1072
ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1194
sctp_v6_get_dst+0x6c0/0x1d20 net/sctp/ipv6.c:300
sctp_transport_pmtu+0x245/0x470 net/sctp/transport.c:227
sctp_transport_route+0x15b/0x350 net/sctp/transport.c:304
sctp_packet_config+0xa0b/0xdc0 net/sctp/output.c:103
sctp_packet_singleton net/sctp/outqueue.c:771 [inline]
sctp_outq_flush_ctrl.constprop.0+0x6bd/0xc40 net/sctp/outqueue.c:904
sctp_outq_flush+0xf3/0x2580 net/sctp/outqueue.c:1186
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1801 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1185 [inline]
sctp_do_sm+0x74e/0x5120 net/sctp/sm_sideeffect.c:1156
sctp_primitive_ASSOCIATE+0x98/0xc0 net/sctp/primitive.c:73
sctp_sendmsg_to_asoc+0xb8b/0x2180 net/sctp/socket.c:1823
sctp_sendmsg+0x103b/0x1d30 net/sctp/socket.c:2013
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e8/0x810 net/socket.c:2348
___sys_sendmsg+0xf3/0x170 net/socket.c:2402
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2435
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
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:00007fed8ff54188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000f0ff7f RSI: 00000000200006c0 RDI: 0000000000000004
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fffe155ccef R14: 00007fed8ff54300 R15: 0000000000022000
================================
WARNING: inconsistent lock state
5.11.0-syzkaller #0 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
syz-executor.0/19727 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: print_other_cpu_stall kernel/rcu/tree_stall.h:541 [inline]
ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: check_cpu_stall kernel/rcu/tree_stall.h:706 [inline]
ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: rcu_pending kernel/rcu/tree.c:3830 [inline]
ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: rcu_sched_clock_irq.cold+0x2b9/0x11dd kernel/rcu/tree.c:2650
{IN-HARDIRQ-W} state was registered at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
rcu_report_exp_cpu_mult+0x73/0x3a0 kernel/rcu/tree_exp.h:237
flush_smp_call_function_queue+0x34b/0x640 kernel/smp.c:426
__sysvec_call_function_single+0x95/0x3d0 arch/x86/kernel/smp.c:248
asm_call_irq_on_stack+0xf/0x20
__run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
sysvec_call_function_single+0xbd/0x100 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:643
check_memory_region_inline mm/kasan/generic.c:168 [inline]
check_memory_region+0x15/0x180 mm/kasan/generic.c:185
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:373 [inline]
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0xa1/0x710 kernel/locking/lockdep.c:5521
might_alloc include/linux/sched/mm.h:193 [inline]
slab_pre_alloc_hook mm/slab.h:493 [inline]
slab_alloc_node mm/slub.c:2817 [inline]
slab_alloc mm/slub.c:2900 [inline]
kmem_cache_alloc+0x3b/0x440 mm/slub.c:2905
prepare_kernel_cred+0x23/0x800 kernel/cred.c:687
call_usermodehelper_exec_async+0x10e/0x580 kernel/umh.c:90
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
irq event stamp: 12937307
hardirqs last enabled at (12937306): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
hardirqs last disabled at (12937307): [] sysvec_apic_timer_interrupt+0xc/0x100 arch/x86/kernel/apic/apic.c:1100
softirqs last enabled at (6953614): [] asm_call_irq_on_stack+0xf/0x20
softirqs last disabled at (6953617): [] asm_call_irq_on_stack+0xf/0x20
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(rcu_node_0);
lock(rcu_node_0);
*** DEADLOCK ***
4 locks held by syz-executor.0/19727:
#0: ffff88805d201220 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
#0: ffff88805d201220 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sctp_sendmsg+0xf2a/0x1d30 net/sctp/socket.c:1952
#1: ffffffff8bf73be0 (rcu_read_lock){....}-{1:2}, at: ieee80211_iterate_active_interfaces_atomic+0x0/0x170 net/mac80211/util.c:1299
#2: ffffffff908f75b8 (&hwsim_radio_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
#2: ffffffff908f75b8 (&hwsim_radio_lock){+.-.}-{2:2}, at: mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1514
#3: ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: print_other_cpu_stall kernel/rcu/tree_stall.h:541 [inline]
#3: ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: check_cpu_stall kernel/rcu/tree_stall.h:706 [inline]
#3: ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: rcu_pending kernel/rcu/tree.c:3830 [inline]
#3: ffffffff8bf7c198 (rcu_node_0){?.-.}-{2:2}, at: rcu_sched_clock_irq.cold+0x2b9/0x11dd kernel/rcu/tree.c:2650
stack backtrace:
CPU: 0 PID: 19727 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0xfa/0x151 lib/dump_stack.c:120
print_usage_bug kernel/locking/lockdep.c:202 [inline]
valid_state kernel/locking/lockdep.c:3818 [inline]
mark_lock_irq kernel/locking/lockdep.c:4021 [inline]
mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4478
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4079
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4097 [inline]
lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4165 [inline]
lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4117
trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x3c4/0xb40 kernel/locking/qspinlock.c:508
Code: 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 41 83 ec 01 0f 84 72 04 00 00 <41> 0f b6 45 00 38 d8 7f 08 84 c0 0f 85 91 05 00 00 0f b6 45 00 84
RSP: 0018:ffffc90000007a50 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff211eeb4
RDX: 0000000000000001 RSI: dffffc0000000000 RDI: ffffffff908f75a2
RBP: ffffffff908f75a0 R08: 0000000000000001 R09: ffffffff908f75a3
R10: fffffbfff211eeb4 R11: 0000000000000080 R12: 0000000000002067
R13: fffffbfff211eeb4 R14: 0000000000000001 R15: ffff8880b9c35f40
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
spin_lock include/linux/spinlock.h:354 [inline]
mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1514
mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1775
mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1829
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852
__run_hrtimer kernel/time/hrtimer.c:1519 [inline]
__hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
__do_softirq+0x29b/0x9f6 kernel/softirq.c:343
asm_call_irq_on_stack+0xf/0x20
__run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:226 [inline]
__irq_exit_rcu kernel/softirq.c:420 [inline]
irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:lock_is_held include/linux/lockdep.h:278 [inline]
RIP: 0010:schedule_debug kernel/sched/core.c:4843 [inline]
RIP: 0010:__schedule+0x14d0/0x21a0 kernel/sched/core.c:4969
Code: f2 48 c1 ea 03 80 3c 02 00 0f 84 66 f1 ff ff 4c 89 f7 4c 89 8d 70 ff ff ff e8 dc c6 b3 f8 4c 8b 8d 70 ff ff ff e9 4b f1 ff ff ff ff ff ff 48 c7 c7 80 3b f7 8b e8 9f 93 fe ff 85 c0 0f 84 b5
RSP: 0018:ffffc90001b9f050 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffff92000373e12
RDX: 1ffff92000373000 RSI: 0000000000000001 RDI: ffff88801c0837a0
RBP: ffffc90001b9f118 R08: 0000000000000001 R09: ffffffff8fa998a7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880b9c35180
R13: ffff88801c083780 R14: 0000000000035180 R15: ffffc90001b98000
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5532
irqentry_exit_cond_resched kernel/entry/common.c:392 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:384 [inline]
irqentry_exit+0x7a/0xa0 kernel/entry/common.c:428
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:arch_stack_walk+0x24/0xe0 arch/x86/kernel/stacktrace.c:17
Code: cc cc cc cc cc cc 55 48 89 e5 41 56 49 89 d6 41 55 49 89 cd 41 54 49 89 f4 53 48 89 fb 48 83 ec 68 65 48 8b 04 25 28 00 00 00 <48> 89 45 d8 31 c0 48 85 c9 0f 84 84 00 00 00 48 8b b1 80 00 00 00
RSP: 0018:ffffc90001b9f1f8 EFLAGS: 00000292
RAX: e733bc60833da900 RBX: ffffffff81617dd0 RCX: 0000000000000000
RDX: ffff88801c083780 RSI: ffffc90001b9f2b0 RDI: ffffffff81617dd0
RBP: ffffc90001b9f280 R08: 00000000000000fc R09: ffffed10107b0700
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90001b9f2b0
R13: 0000000000000000 R14: ffff88801c083780 R15: 0000000000000800
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:401 [inline]
____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
kasan_slab_alloc include/linux/kasan.h:209 [inline]
slab_post_alloc_hook mm/slab.h:512 [inline]
slab_alloc_node mm/slub.c:2892 [inline]
__kmalloc_node_track_caller+0x1e0/0x3f0 mm/slub.c:4550
kmalloc_reserve net/core/skbuff.c:353 [inline]
__alloc_skb+0xde/0x340 net/core/skbuff.c:424
alloc_skb include/linux/skbuff.h:1102 [inline]
_sctp_make_chunk+0x50/0x260 net/sctp/sm_make_chunk.c:1418
sctp_make_data net/sctp/sm_make_chunk.c:1450 [inline]
sctp_make_datafrag_empty+0x164/0x230 net/sctp/sm_make_chunk.c:740
sctp_datamsg_from_user+0x615/0x1230 net/sctp/chunk.c:262
sctp_sendmsg_to_asoc+0x13ae/0x2180 net/sctp/socket.c:1841
sctp_sendmsg+0x103b/0x1d30 net/sctp/socket.c:2013
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e8/0x810 net/socket.c:2348
___sys_sendmsg+0xf3/0x170 net/socket.c:2402
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2435
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
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:00007f3c01912188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000f0ff7f RSI: 00000000200006c0 RDI: 0000000000000004
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffc1a15c03f R14: 00007f3c01912300 R15: 0000000000022000
softirq: huh, entered softirq 8 HRTIMER 000000003a2cb052 with preempt_count 00000101, exited with 00000102?