rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7307/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=28361, q=253 ncpus=2)
task:syz-executor.1 state:R running task stack:26544 pid:7307 tgid:7304 ppid:5115 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:write_comp_data+0x34/0x90 kernel/kcov.c:236
Code: 48 8b 15 ff fa 75 7e 65 8b 05 00 fb 75 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 1c 16 00 00 85 c0 74 4f 8b 82 f8 15 00 00 <83> f8 03 75 44 48 8b 82 00 16 00 00 8b 92 fc 15 00 00 48 8b 38 48
RSP: 0018:ffffc900032ef3c0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 00000000ffffa878 RCX: ffffffff88bd1f72
RDX: ffff88802b8ada00 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000003c50 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffa878 R11: 0000000000000001 R12: 00000000000041c8
R13: dffffc0000000000 R14: ffff88802cf2fdc0 R15: 0000000000009950
skb_copy_bits+0x3a2/0x7a0 net/core/skbuff.c:2991
find_prev_fhdr net/ipv6/netfilter/nf_conntrack_reasm.c:413 [inline]
nf_ct_frag6_gather+0x3b8/0x29e0 net/ipv6/netfilter/nf_conntrack_reasm.c:454
ipv6_defrag net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:67 [inline]
ipv6_defrag+0x1df/0x470 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:52
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
__ip6_local_out+0x42a/0x900 net/ipv6/output_core.c:143
ip6_local_out+0x2a/0x4a0 net/ipv6/output_core.c:153
ip6_send_skb+0xcd/0x2d0 net/ipv6/ip6_output.c:1955
ip6_push_pending_frames+0xe0/0x110 net/ipv6/ip6_output.c:1975
rawv6_push_pending_frames net/ipv6/raw.c:588 [inline]
rawv6_sendmsg+0x2f14/0x4340 net/ipv6/raw.c:926
inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:853
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xa09/0xc90 net/socket.c:2585
___sys_sendmsg+0x135/0x1e0 net/socket.c:2639
__sys_sendmsg+0x117/0x1f0 net/socket.c:2668
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa220c7cf69
RSP: 002b:00007fa221a4b0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa220db3fa0 RCX: 00007fa220c7cf69
RDX: 0000000000000004 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fa220cda706 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa220db3fa0 R15: 00007ffd66062cb8
rcu: rcu_preempt kthread starved for 10538 jiffies! g28361 f0x0 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:27312 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7300 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00007-gf06ce441457d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:hlock_class+0x32/0x130 kernel/locking/lockdep.c:228
Code: ff df 53 48 89 fb 48 83 c7 20 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e da 00 00 00 0f b7 5b 20 66 81 e3 ff 1f <0f> b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 b2 26
RSP: 0018:ffffc9000319f750 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 00000000000001bd RCX: 0000000000000003
RDX: 1ffff1100bb2aca0 RSI: ffff88805d9564e0 RDI: ffff88805d956500
RBP: ffffc9000319f8a0 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff9426b2f7 R11: 0000000000000000 R12: ffff88805d955a00
R13: 0000000000000008 R14: 0000000000000003 R15: 1ffff92000633ef2
FS: 00007ff59ed756c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa220da4188 CR3: 0000000028b4e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4656
mark_usage kernel/locking/lockdep.c:4579 [inline]
__lock_acquire+0x12b1/0x3b30 kernel/locking/lockdep.c:5091
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__might_fault mm/memory.c:6233 [inline]
__might_fault+0x11b/0x190 mm/memory.c:6226
__clear_user arch/x86/include/asm/uaccess_64.h:165 [inline]
copy_fpstate_to_sigframe+0x156/0xaa0 arch/x86/kernel/fpu/signal.c:216
get_sigframe+0x455/0x930 arch/x86/kernel/signal.c:142
x64_setup_rt_frame+0x129/0xce0 arch/x86/kernel/signal_64.c:175
setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
handle_signal arch/x86/kernel/signal.c:267 [inline]
arch_do_signal_or_restart+0x5e6/0x7e0 arch/x86/kernel/signal.c:312
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff59e07cf67
Code: 14 25 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
RSP: 002b:00007ff59ed75178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007ff59e1b3fa8 RCX: 00007ff59e07cf69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff59e1b3fa8
RBP: 00007ff59e1b3fa0 R08: 00007ff59ed756c0 R09: 00007ff59ed756c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff59e1b3fac
R13: 000000000000000b R14: 00007ffcfe8eaa10 R15: 00007ffcfe8eaaf8