rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P51/1:b..l P5294/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=9725, q=931 ncpus=2)
task:syz-executor.1 state:R running task stack:24672 pid:5294 tgid:5294 ppid:5094 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lookup_page_ext mm/page_ext.c:253 [inline]
RIP: 0010:page_ext_get+0x19f/0x2a0 mm/page_ext.c:522
Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f6 4a f4 ff 4c 8b 3b e8 7e 65 73 ff 89 c3 31 ff 89 c6 e8 23 8f 8e ff 85 db <0f> 84 ed 00 00 00 e8 d6 8a 8e ff 44 89 fb 83 e3 01 31 ff 48 89 de
RSP: 0018:ffffc90004097710 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000080000000
RDX: ffff88801f7c8000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000180 R08: ffffffff82078b9d R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: 00000000000661dd
R13: 0000000000000001 R14: ffffffff82078a20 R15: ffff888016600000
__set_page_owner+0x9e/0x800 mm/page_owner.c:322
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
vm_area_alloc_pages mm/vmalloc.c:3566 [inline]
__vmalloc_area_node mm/vmalloc.c:3642 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3823
vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3977
kcov_ioctl+0x59/0x630 kernel/kcov.c:705
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfe/0x170 fs/ioctl.c:893
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: 0033:0x7f54f7e7cc4b
RSP: 002b:00007ffe528df190 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f54f7e7cc4b
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000e2
RBP: 00007f54f7fb4838 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe528df8d8
R13: 0000000000000003 R14: 00007f54f7fb4838 R15: 000000000000000a
task:kworker/u8:3 state:R running task stack:22992 pid:51 tgid:51 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 ba 7f 89 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90000bb79e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000176f48 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcacc00 RDI: ffffffff8c1ff240
RBP: ffffc90000bb7b40 R08: ffffffff92fa8587 R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: 1ffff92000176f44
R13: dffffc0000000000 R14: ffffc90000bb7a40 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10574 jiffies! g9725 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:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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 PID: 5314 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00022-g32f88d65f01b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 99 c9 0b 00 48 83 c4 08 4c 89 f7 e8 cd 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 60 97 2a 0a e8 5b f8 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90002d5f7a8 EFLAGS: 00000286
RAX: cbc4509dd3a7e100 RBX: ffff888020ba3c00 RCX: ffffffff947a0603
RDX: dffffc0000000000 RSI: ffffffff8bcaba80 RDI: ffffffff8c1ff240
RBP: ffffc90002d5f7f0 R08: ffffffff8fad462f R09: 1ffffffff1f5a8c5
R10: dffffc0000000000 R11: fffffbfff1f5a8c6 R12: 1ffff110172a7ea7
R13: dffffc0000000000 R14: ffff8880b953e7c0 R15: ffff8880b953f538
FS: 00007f5103a1a6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006485a000 CR4: 0000000000350ef0
Call Trace:
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x17f0/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370
__futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
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: 0033:0x7f5102c7cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5103a1a178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f5102db3f88 RCX: 00007f5102c7cee9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5102db3f88
RBP: 00007f5102db3f80 R08: 00007f5103a1a6c0 R09: 00007f5103a1a6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5102db3f8c
R13: 000000000000000b R14: 00007ffc4ac216c0 R15: 00007ffc4ac217a8