rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=31f4/1/0x4000000000000000 softirq=49719/49720 fqs=12
rcu: (detected by 1, t=10506 jiffies, g=45965, q=99 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11566 Comm: syz.1.1331 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0x422/0x2100 kernel/locking/lockdep.c:5164
Code: 00 31 c0 83 bc 24 e8 00 00 00 00 0f 95 c0 31 c9 41 83 3c 24 00 0f 95 c1 09 cb c1 e3 0d 44 09 f3 8b 4c 24 60 c1 e1 0f 0f b7 c9 <09> d9 8b 5c 24 38 83 e3 03 c1 e3 10 09 cb 8b 4c 24 58 83 e1 01 c1
RSP: 0018:ffffc900000078f0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000004000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: dffffc0000000000 RDI: ffff888031a08ae0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff203075f R12: ffff888031a08ac4
R13: 0000000000000005 R14: 0000000000000000 R15: ffffffff9a650910
FS: 00007f57edfb26c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3bc7fe CR3: 0000000052696000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:428 [inline]
debug_activate kernel/time/hrtimer.c:469 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1076
__run_hrtimer kernel/time/hrtimer.c:1756 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
RIP: 0010:deref_stack_reg+0x27/0x210 arch/x86/kernel/unwind_orc.c:403
Code: 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 54 24 18 49 89 f0 49 89 fe 48 ba 00 00 00 00 00 fc ff df 48 8d 6f 08 <49> 89 ec 49 c1 ec 03 41 80 3c 14 00 48 89 34 24 74 16 48 89 ef e8
RSP: 0018:ffffc900035c73d8 EFLAGS: 00000286
RAX: fffffffffffffff0 RBX: ffffffff90a8d028 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc900035c7ed8 RDI: ffffc900035c7500
RBP: ffffc900035c7508 R08: ffffc900035c7ed8 R09: 0000000000000000
R10: ffffc900035c7550 R11: fffff520006b8eac R12: ffffc900035c8000
R13: ffffc900035c7500 R14: ffffc900035c7500 R15: ffffc900035c7550
unwind_next_frame+0x1799/0x22d0
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
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
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2338 [inline]
slab_free mm/slub.c:4598 [inline]
kfree+0x196/0x430 mm/slub.c:4746
bpf_int_jit_compile+0x1445/0x1910 arch/x86/net/bpf_jit_comp.c:3619
bpf_prog_select_runtime+0x4a3/0x810 kernel/bpf/core.c:2424
bpf_prog_load+0x16c6/0x20f0 kernel/bpf/syscall.c:2951
__sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790
__do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895
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: 0033:0x7f57ed17ff19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f57edfb2058 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f57ed345fa0 RCX: 00007f57ed17ff19
RDX: 0000000000000090 RSI: 00000000200004c0 RDI: 0000000000000005
RBP: 00007f57ed1f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f57ed345fa0 R15: 00007fff9a3190f8
rcu: rcu_preempt kthread starved for 10445 jiffies! g45965 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:25976 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
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:
CPU: 1 UID: 0 PID: 5868 Comm: kworker/1:3 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events fqdir_free_fn
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d b4 94 8d 0c 48 89 de 5b e9 93 64 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 80 d4 03 00 65 8b 15 80 76 64 7e 81 e2 00 01 ff 00
RSP: 0018:ffffc900040ef958 EFLAGS: 00000202
RAX: ffffffff81933b56 RBX: 1ffff9200081df49 RCX: ffff888031273c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900040efb00 R08: ffffffff81933b19 R09: 1ffff9200081def8
R10: dffffc0000000000 R11: fffff5200081def9 R12: 1ffff9200081df44
R13: dffffc0000000000 R14: ffffc900040efa48 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9fb5d3c000 CR3: 0000000052696000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csd_lock_wait kernel/smp.c:340 [inline]
smp_call_function_single+0x476/0x1990 kernel/smp.c:679
rcu_barrier+0x327/0x530 kernel/rcu/tree.c:4617
fqdir_free_fn+0x32/0x140 net/ipv4/inet_fragment.c:167
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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