rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8690/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=51773, q=796 ncpus=2)
task:syz.3.596       state:R  running task     stack:25888 pid:8690  tgid:8689  ppid:8191   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:skb_copy_bits+0x7/0x7a0 net/core/skbuff.c:2954
Code: e9 6c fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 50 48 89 4c 24 10 48 89 d3 48 89 34
RSP: 0018:ffffc90004747048 EFLAGS: 00000286
RAX: 0000000000000002 RBX: ffffc90004747100 RCX: 0000000000000002
RDX: ffffc90004747100 RSI: 000000000000b2c0 RDI: ffff88803324c3c0
RBP: ffffc90004747170 R08: ffffffff8a71ea47 R09: ffffffff8a71e964
R10: 0000000000000006 R11: ffff8880276f8000 R12: ffff88803324c498
R13: 0000000000000000 R14: 000000000000b2c0 R15: dffffc0000000000
 __skb_header_pointer include/linux/skbuff.h:4099 [inline]
 skb_header_pointer include/linux/skbuff.h:4108 [inline]
 ipv6_skip_exthdr+0x40f/0x710 net/ipv6/exthdrs_core.c:85
 is_ineligible net/ipv6/icmp.c:146 [inline]
 icmp6_send+0xa23/0x2070 net/ipv6/icmp.c:530
 __icmpv6_send include/linux/icmpv6.h:28 [inline]
 icmpv6_send include/linux/icmpv6.h:49 [inline]
 ip6_fragment+0x5ba/0x22c0 net/ipv6/ip6_output.c:1041
 __ip6_finish_output net/ipv6/ip6_output.c:213 [inline]
 ip6_finish_output+0x2b8/0x810 net/ipv6/ip6_output.c:226
 ip6_send_skb+0x1b1/0x3b0 net/ipv6/ip6_output.c:1968
 rawv6_push_pending_frames+0x75c/0x9e0 net/ipv6/raw.c:588
 rawv6_sendmsg+0x19c7/0x23c0 net/ipv6/raw.c:926
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 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: 0033:0x7fa123979eb9
RSP: 002b:00007fa124721038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa123b15f80 RCX: 00007fa123979eb9
RDX: 0000000000000004 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007fa1239e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa123b15f80 R15: 00007ffcc32f2dc8
 </TASK>
rcu: rcu_preempt kthread starved for 2187 jiffies! g51773 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:25752 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8679 Comm: syz.0.593 Not tainted 6.11.0-rc5-syzkaller-00310-ge8784b0aef62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:209
Code: 89 fb e8 23 00 00 00 48 8b 3d 2c 27 75 0c 48 89 de 5b e9 e3 74 58 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 c0 d6 03 00 65 8b 15 d0 4a
RSP: 0018:ffffc900041c7b60 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802d7d8000
RDX: ffff88802d7d8000 RSI: ffffffff8c3fb8e0 RDI: ffffffff8c3fb8a0
RBP: 0000000000000001 R08: ffffffff8159d891 R09: 1ffffffff27f4d08
R10: dffffc0000000000 R11: fffffbfff27f4d09 R12: 0000000000000820
R13: ffffffff8159d6af R14: ffffffff8e5edcc0 R15: 0000000000000820
FS:  00007fe45c7726c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc32f2f40 CR3: 0000000071014000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 rcu_read_unlock include/linux/rcupdate.h:867 [inline]
 __sigqueue_alloc+0x229/0x540 kernel/signal.c:421
 __send_signal_locked+0x22f/0xdc0 kernel/signal.c:1119
 do_send_sig_info kernel/signal.c:1301 [inline]
 group_send_sig_info+0x292/0x310 kernel/signal.c:1451
 bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
 ____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
 bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
 bpf_prog_7ba5217f62dcd359+0x40/0x44
 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447
 trace_sys_enter+0x93/0xd0 include/trace/events/syscalls.h:18
 syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
 do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe45b915839
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fe45c771b40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fe45bb15f88 RCX: 00007fe45b915839
RDX: 00007fe45c771b40 RSI: 00007fe45c771c70 RDI: 0000000000000011
RBP: 00007fe45bb15f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe45bb15f8c
R13: 0000000000000000 R14: 00007ffe3432f8c0 R15: 00007ffe3432f9a8
 </TASK>