rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13732/1:b..l
(detected by 0, t=10503 jiffies, g=47313, q=200)
task:sed state:R running task stack:27120 pid:13732 ppid: 13728 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
irqentry_exit+0x63/0x70 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:memcpy+0x0/0x60 mm/kasan/shadow.c:64
Code: e1 e8 b4 ee ff ff 84 c0 74 15 4c 89 ff 4c 89 f6 48 89 da 5b 41 5c 41 5e 41 5f e9 9b 22 4c 02 31 c0 5b 41 5c 41 5e 41 5f c3 90 <41> 57 41 56 41 54 53 48 89 d3 49 89 f6 49 89 ff 4c 8b 64 24 20 48
RSP: 0018:ffffc9000308f898 EFLAGS: 00000202
RAX: ffffffff81ccc80a RBX: ffffc9000308fc40 RCX: ffff88802aabbb80
RDX: 0000000000000010 RSI: ffffc9000308fc60 RDI: ffffc9000308fc40
RBP: 0000000000000040 R08: ffffc9000308fc6f R09: 1ffff92000611f8d
R10: dffffc0000000000 R11: fffff52000611f8e R12: dffffc0000000000
R13: 1ffff92000611f8f R14: ffffc9000308fc78 R15: ffffc9000308fc60
nd_jump_root+0x1c0/0x410 fs/namei.c:969
path_init+0x382/0x1160 fs/namei.c:2373
path_openat+0x19a/0x2fa0 fs/namei.c:3745
do_filp_open+0x1e2/0x410 fs/namei.c:3777
do_sys_openat2+0x150/0x4b0 fs/open.c:1255
do_sys_open fs/open.c:1271 [inline]
__do_sys_openat fs/open.c:1287 [inline]
__se_sys_openat fs/open.c:1282 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1282
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8e20aa40ba
RSP: 002b:00007ffc1406dd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffc1406dd80 RCX: 00007f8e20aa40ba
RDX: 0000000000080000 RSI: 00007ffc1406dd80 RDI: 00000000ffffff9c
RBP: 00007ffc1406dd70 R08: 00007ffc1406df77 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032
R13: 00007f8e20a80050 R14: 00007ffc1406df90 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10387 jiffies! g47313 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:27800 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
rcu_gp_fqs_loop+0x2be/0x11d0 kernel/rcu/tree.c:1972
rcu_gp_kthread+0x9b/0x370 kernel/rcu/tree.c:2145
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
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: 13731 Comm: syz.2.2888 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:212 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:156 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:263 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:208
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 5f 78 d0 02 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000395fa48 EFLAGS: 00000046
RAX: 0000000000000064 RBX: 0000000000000064 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000000064 RDI: 0000000000000838
RBP: 0000000000000001 R08: ffffffff8d89f82f R09: 1ffffffff1b13f05
R10: dffffc0000000000 R11: fffffbfff1b13f06 R12: dffffc0000000000
R13: 0000000010000863 R14: ffffffff8be339d8 R15: dffffc0000000000
FS: 00007f33a4b3e6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c40b82c CR3: 0000000024968000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
apic_write arch/x86/include/asm/apic.h:395 [inline]
lapic_next_event+0x5b/0x70 arch/x86/kernel/apic/apic.c:468
clockevents_program_event+0x1bc/0x310 kernel/time/clockevents.c:334
hrtimer_start_range_ns+0xa9a/0xc20 kernel/time/hrtimer.c:1287
posixtimer_rearm+0x131/0x340 kernel/time/posix-timers.c:329
dequeue_signal+0x174/0x440 kernel/signal.c:696
get_signal+0x70a/0x12d0 kernel/signal.c:2781
arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f33a6905e57
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007f33a4b3e028 EFLAGS: 00000246
RAX: 0000000000000049 RBX: 00007f33a6b7f090 RCX: 00007f33a6905e59
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 00007f33a699bd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33a6b7f128 R14: 00007f33a6b7f090 R15: 00007ffded24f918