rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P49/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=38361, q=343 ncpus=2)
task:kworker/u4:3 state:R running task stack:22424 pid:49 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_acquire+0x1f2/0x410 kernel/locking/lockdep.c:5758
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc90000ba7a40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 14232fef22ddfe00
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6b00
RBP: ffffc90000ba7b48 R08: dffffc0000000000 R09: 1ffffffff21b50a0
R10: dffffc0000000000 R11: fffffbfff21b50a1 R12: 1ffff92000174f54
R13: ffffffff8cd2fee0 R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
rcu_read_lock include/linux/rcupdate.h:786 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xef/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: rcu_preempt kthread timer wakeup didn't happen for 10410 jiffies! g38361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=25033
rcu: rcu_preempt kthread starved for 10411 jiffies! g38361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27688 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
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: 9528 Comm: syz.0.850 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:rb_add_cached include/linux/rbtree.h:172 [inline]
RIP: 0010:timerqueue_add+0x6b/0x1f0 lib/timerqueue.c:40
Code: f7 4d 8b 3c 24 4c 89 ff 4c 89 e6 e8 1f 28 26 f7 4d 39 e7 0f 85 81 01 00 00 e8 01 26 26 f7 4c 89 f3 48 c1 eb 03 42 80 3c 2b 00 <74> 08 4c 89 f7 e8 3b 81 7d f7 49 8b 2e 48 85 ed 0f 84 eb 00 00 00
RSP: 0018:ffffc900001f0cb8 EFLAGS: 00000046
RAX: ffffffff8a5f698f RBX: 1ffff110171e570a RCX: ffff8880187dda00
RDX: 0000000000010000 RSI: ffff888078423340 RDI: ffff888078423340
RBP: 0000000000000002 R08: ffffffff8e4a8d6f R09: 1ffffffff1c951ad
R10: dffffc0000000000 R11: fffffbfff1c951ae R12: ffff888078423340
R13: dffffc0000000000 R14: ffff8880b8f2b850 R15: ffff888078423340
FS: 00007f4b68a396c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b67b72a60 CR3: 0000000077b3e000 CR4: 00000000003526e0
Call Trace:
enqueue_hrtimer+0x19b/0x370 kernel/time/hrtimer.c:1116
__run_hrtimer kernel/time/hrtimer.c:1767 [inline]
__hrtimer_run_queues+0x637/0xc40 kernel/time/hrtimer.c:1814
hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1876
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:unwind_next_frame+0x154/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 00 e8 20 eb 4a 00 eb 05 e8 19 eb 4a 00 4c 89 7c 24 78 4d 8d 74 24 35 4c 89 f0 48 c1 e8 03 48 89 44 24 38 42 0f b6 04 28 84 c0 <48> 8b 5c 24 20 0f 85 64 21 00 00 45 0f b6 3e 48 8b 44 24 40 42 80
RSP: 0018:ffffc9000436f198 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff9200086de4d RCX: 0000000000080000
RDX: ffffc9000e11f000 RSI: 000000000000356c RDI: 000000000000356d
RBP: ffffc9000436f2b8 R08: ffffc9000436f330 R09: 0000000000000008
R10: 0000000000000004 R11: 0000000000000002 R12: ffffc9000436f268
R13: dffffc0000000000 R14: ffffc9000436f29d R15: ffffffff8a5aeb88
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519
kmem_cache_zalloc include/linux/slab.h:711 [inline]
__kernfs_new_node+0xd8/0x7e0 fs/kernfs/dir.c:624
kernfs_new_node+0x14c/0x260 fs/kernfs/dir.c:700
kernfs_create_dir_ns+0x44/0x120 fs/kernfs/dir.c:1061
sysfs_create_dir_ns+0x124/0x280 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x6b8/0xc70 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_init_and_add+0x126/0x190 lib/kobject.c:457
bus_add_driver+0x255/0x640 drivers/base/bus.c:668
driver_register+0x23a/0x310 drivers/base/driver.c:246
usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1687
raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:548 [inline]
raw_ioctl+0x14d0/0x3b70 drivers/usb/gadget/legacy/raw_gadget.c:1259
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4b67b8f34b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f4b68a36f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007f4b67b8f34b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000012
RBP: 00007f4b68a37fe0 R08: 0000000000000000 R09: 00302e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b68a36fb0 R14: 0000200000000200 R15: 00007f4b67f10320