rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5098/2:b..l
rcu: (detected by 1, t=10502 jiffies, g=53785, q=235 ncpus=2)
task:syz-fuzzer state:R running task stack:22048 pid:5098 tgid:5070 ppid:5068 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:851 [inline]
__dev_queue_xmit+0x16c9/0x3d30 net/core/dev.c:4420
dev_queue_xmit include/linux/netdevice.h:3095 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0xd41/0x1380 net/ipv4/ip_output.c:235
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x118c/0x1b70 net/ipv4/ip_output.c:535
__tcp_transmit_skb+0x2557/0x3b80 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_write_xmit+0x18b3/0x69d0 net/ipv4/tcp_output.c:2829
__tcp_push_pending_frames+0x9b/0x360 net/ipv4/tcp_output.c:3014
tcp_sendmsg_locked+0x43b1/0x4e10 net/ipv4/tcp.c:1319
tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1351
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x1a6/0x270 net/socket.c:745
sock_write_iter+0x2dd/0x400 net/socket.c:1160
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40720e
RSP: 002b:000000c000611ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000040720e
RDX: 0000000000000168 RSI: 000000c00163be98 RDI: 0000000000000003
RBP: 000000c000611b28 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000c000611c68
R13: 000000000004ffd6 R14: 000000c0000ec680 R15: 000000c0015ec000
rcu: rcu_preempt kthread starved for 10541 jiffies! g53785 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26928 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11286 Comm: syz-executor.3 Not tainted 6.10.0-rc4-syzkaller-00164-g66cc544fd75c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x2d/0x90 kernel/kcov.c:284
Code: fa 4c 8b 04 24 65 48 8b 0c 25 80 d4 03 00 65 8b 05 70 ad 6d 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 1c 16 00 00 00 <74> 4e 8b 81 f8 15 00 00 83 f8 03 75 43 48 8b 91 00 16 00 00 44 8b
RSP: 0018:ffffc900000071f8 EFLAGS: 00000246
RAX: 0000000080000103 RBX: ffffc90000008000 RCX: ffff8880233e0000
RDX: ffff8880233e0000 RSI: ffffc90000007340 RDI: ffffc900000073e0
RBP: ffffc90000007340 R08: ffffffff81410de5 R09: ffffffff8141095f
R10: 0000000000000003 R11: ffff8880233e0000 R12: ffffc900000073e0
R13: dffffc0000000000 R14: ffffc90000000000 R15: ffffc900000073e8
FS: 00007ff5d3b556c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5d3b54f80 CR3: 0000000023f48000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
unwind_next_frame+0x1df5/0x2a00 arch/x86/kernel/unwind_orc.c:665
__unwind_start+0x641/0x7c0 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3941 [inline]
slab_alloc_node mm/slub.c:4001 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4044
kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:575
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:666
skb_copy+0x12b/0x820 net/core/skbuff.c:2124
mac80211_hwsim_tx_frame_no_nl+0x1068/0x18d0 drivers/net/wireless/virtual/mac80211_hwsim.c:1857
mac80211_hwsim_tx_frame+0x1cc/0x220 drivers/net/wireless/virtual/mac80211_hwsim.c:2206
mac80211_hwsim_beacon_tx+0x3bf/0x850 drivers/net/wireless/virtual/mac80211_hwsim.c:2306
__iterate_interfaces+0x223/0x4c0 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:808
mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2336
__run_hrtimer kernel/time/hrtimer.c:1687 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751
hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1768
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 99 c9 0b 00 48 83 c4 08 4c 89 f7 e8 cd 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 e0 42 21 0a e8 fb ed 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900048bf7a8 EFLAGS: 00000286
RAX: 4caf145fd6b72000 RBX: ffff8880233e0000 RCX: ffffffff94766603
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: ffffffff8c1f12c0
RBP: ffffc900048bf7f0 R08: ffffffff8fac1aaf R09: 1ffffffff1f58355
R10: dffffc0000000000 R11: fffffbfff1f58356 R12: 1ffff11017287e97
R13: dffffc0000000000 R14: ffff8880b943e740 R15: ffff8880b943f4b8
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x179e/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370
__futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff5d2e7d0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff5d3b55178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff5d2fb3f88 RCX: 00007ff5d2e7d0a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff5d2fb3f88
RBP: 00007ff5d2fb3f80 R08: 00007ff5d3b556c0 R09: 00007ff5d3b556c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff5d2fb3f8c
R13: 000000000000000b R14: 00007ffd1df5d5f0 R15: 00007ffd1df5d6d8