rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17314/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=103845, q=414 ncpus=2)
task:sed state:R running task stack:25992 pid:17314 tgid:17314 ppid:17312 task_flags:0x400000 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x44/0x3e0 kernel/locking/lockdep.c:5879
Code: 8b 05 a0 41 03 11 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 a3 41 03 11 83 f8 08 0f 83 9a 02 00 00 89 c0 48 0f a3 05 8c 32 06 0e <73> 16 e8 45 f1 08 00 84 c0 75 0d f6 05 f8 16 f0 0d 01 0f 84 ad 02
RSP: 0018:ffffc90002f46e28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026cf1e00
RDX: 0000000000000000 RSI: ffffffff81cea506 RDI: ffffffff8e139f20
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81cea506
R10: ffffc90002f46f78 R11: ffffffff81ac3ae0 R12: 0000000000000004
R13: ffffffff81cea506 R14: ffffffff8e139f20 R15: 0000000000000000
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
is_bpf_text_address+0x28d/0x2b0 kernel/bpf/core.c:778
kernel_text_address+0xa5/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:330 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4247
ptlock_alloc mm/memory.c:7161 [inline]
ptlock_init include/linux/mm.h:2953 [inline]
pmd_ptlock_init include/linux/mm.h:3081 [inline]
pagetable_pmd_ctor include/linux/mm.h:3109 [inline]
pmd_alloc_one_noprof include/asm-generic/pgalloc.h:145 [inline]
__pmd_alloc+0xc6/0x3b0 mm/memory.c:6450
pmd_alloc include/linux/mm.h:2844 [inline]
alloc_new_pmd mm/mremap.c:134 [inline]
move_page_tables+0x1918/0x1b20 mm/mremap.c:846
relocate_vma_down+0x316/0x500 mm/vma_exec.c:66
setup_arg_pages+0x5df/0xaa0 fs/exec.c:690
load_elf_binary+0xba4/0x2740 fs/binfmt_elf.c:1013
search_binary_handler fs/exec.c:1670 [inline]
exec_binprm fs/exec.c:1702 [inline]
bprm_execve+0x999/0x1450 fs/exec.c:1754
do_execveat_common+0x510/0x6a0 fs/exec.c:1860
do_execve fs/exec.c:1934 [inline]
__do_sys_execve fs/exec.c:2010 [inline]
__se_sys_execve fs/exec.c:2005 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2005
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39a6bd9107
RSP: 002b:00007ffc56216bf8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00005651415c1078 RCX: 00007f39a6bd9107
RDX: 00005651415c10a0 RSI: 00005651415c1078 RDI: 00005651415c1130
RBP: 00005651415c1130 R08: 00007ffc5621ce7c R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00005651415c10a0
R13: 00007f39a6d9ee8b R14: 00005651415c10a0 R15: 0000000000000000
rcu: rcu_preempt kthread timer wakeup didn't happen for 10537 jiffies! g103845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=71544
rcu: rcu_preempt kthread starved for 10540 jiffies! g103845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27352 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 17306 Comm: syz.0.2852 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
Code: 24 65 48 8b 0c 25 08 b0 a0 92 65 8b 15 38 01 e1 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48
RSP: 0018:ffffc900034ef0d8 EFLAGS: 00000246
RAX: ffffffff8a2227d2 RBX: 0000000007000000 RCX: ffff888033741e00
RDX: 0000000000000000 RSI: 0000000005000000 RDI: 0000000007000000
RBP: ffffc900034ef230 R08: 0000000000000000 R09: ffffffff8a2225c0
R10: dffffc0000000000 R11: fffff5200069de0c R12: dffffc0000000000
R13: ffff8880558da640 R14: 0000000005000000 R15: ffffc900034ef6a0
FS: 0000000000000000(0000) GS:ffff888125c15000(0063) knlGS:00000000f5464b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003311affc CR3: 00000000333ee000 CR4: 00000000003526f0
Call Trace:
xfrm_state_lookup_spi_proto net/xfrm/xfrm_state.c:1708 [inline]
xfrm_alloc_spi+0x4b2/0xf30 net/xfrm/xfrm_state.c:2589
xfrm_alloc_userspi+0x70b/0xc90 net/xfrm/xfrm_user.c:1873
xfrm_user_rcv_msg+0x7a0/0xab0 net/xfrm/xfrm_user.c:3501
netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552
xfrm_netlink_rcv+0x79/0x90 net/xfrm/xfrm_user.c:3523
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:729
____sys_sendmsg+0x505/0x830 net/socket.c:2614
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
__sys_sendmsg+0x164/0x220 net/socket.c:2700
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fa8539
Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f546455c EFLAGS: 00000206 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000080000080
RDX: 0000000000004810 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000