net_ratelimit: 4 callbacks suppressed
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15438/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=259733, q=663 ncpus=1)
task:syz-executor state:R running task stack:22216 pid:15438 tgid:15438 ppid:15414 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5584 [inline]
__schedule+0x1b47/0x5b40 kernel/sched/core.c:7387
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7667
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:524 [inline]
irqentry_exit+0x14f/0x920 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x60/0x350 kernel/locking/lockdep.c:5907
Code: 00 65 8b 05 fa 15 3b 12 83 f8 08 0f 83 9b 01 00 00 89 c0 48 0f a3 05 67 37 18 0f 73 0d e8 e8 56 09 00 84 c0 0f 84 e2 01 00 00 <83> 3d 79 66 18 0f 00 0f 84 e9 00 00 00 48 8b b4 24 88 00 00 00 4c
RSP: 0018:ffffc9000459f2e8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffffffff8c8f4a60 RDI: ffffffff8c8f4a20
RBP: 1ffff920008b3e8c R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000459f478 R11: ffffffff81b355e0 R12: ffffffff8f15a260
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1401 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2952
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__do_kmalloc_node mm/slub.c:5530 [inline]
__kmalloc_noprof+0x302/0x710 mm/slub.c:5556
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x2ad/0x570 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x5fa/0x640 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
security_inode_getattr+0x12b/0x310 security/security.c:1942
vfs_getattr fs/stat.c:259 [inline]
vfs_fstat fs/stat.c:281 [inline]
__do_sys_newfstat fs/stat.c:551 [inline]
__se_sys_newfstat+0x133/0x440 fs/stat.c:546
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea9c19c7a7
RSP: 002b:00007ffcd30c3e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fea9c19c7a7
RDX: 0000000000000000 RSI: 00007ffcd30c3e90 RDI: 0000000000000003
RBP: 00007ffcd30c3f8c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000001a7
R13: 0000000000000000 R14: 00000000000b890e R15: 00007ffcd30c3fe0
rcu: rcu_preempt kthread starved for 958 jiffies! g259733 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27392 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5584 [inline]
__schedule+0x1b47/0x5b40 kernel/sched/core.c:7387
__schedule_loop kernel/sched/core.c:7464 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7479
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
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: 6333 Comm: kworker/u8:15 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:37 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x80 kernel/kcov.c:223
Code: de 5b e9 e3 37 66 00 cc cc cc 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 0d 98 28 16 12 <65> 48 8b 15 98 28 16 12 f7 c2 00 01 00 ff 74 29 89 d6 81 e6 00 01
RSP: 0018:ffffc90000007a50 EFLAGS: 00000246
RAX: ffffffff8a5cd95b RBX: ffff8880775e1c00 RCX: ffff88802d369f40
RDX: 8000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000100 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff8a5cc2e0 R12: ffff888187520280
R13: ffff88807e2b27c0 R14: ffff8880775e1c00 R15: ffff8881875202d8
FS: 0000000000000000(0000) GS:ffff888124632000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555803294e8 CR3: 000000000ef48000 CR4: 00000000003526f0
Call Trace:
skb_dst include/linux/skbuff.h:1162 [inline]
skb_valid_dst include/net/dst_metadata.h:95 [inline]
ip_rcv_finish_core+0x41b/0x1c00 net/ipv4/ip_input.c:406
ip_rcv_finish+0x14c/0x2a0 net/ipv4/ip_input.c:490
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6333 [inline]
__netif_receive_skb net/core/dev.c:6446 [inline]
process_backlog+0xa6b/0x18b0 net/core/dev.c:6797
__napi_poll+0xaa/0x330 net/core/dev.c:7866
napi_poll net/core/dev.c:7929 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8086
handle_softirqs+0x223/0x840 kernel/softirq.c:645
do_softirq+0x77/0xd0 kernel/softirq.c:546
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2709 [inline]
batadv_tt_purge+0x4ee/0xa40 net/batman-adv/translation-table.c:4099
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245