rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P154/1:b..l P3546/1:b..l
(detected by 0, t=10502 jiffies, g=6745, q=296)
task:udevd state:R running task stack:23168 pid: 3546 ppid: 1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6552
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6577
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
_raw_spin_unlock_irqrestore+0x128/0x130 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
__wake_up_common_lock kernel/sched/wait.c:140 [inline]
__wake_up_sync_key+0x121/0x1c0 kernel/sched/wait.c:205
sock_def_readable+0x135/0x240 net/core/sock.c:3095
__netlink_sendskb net/netlink/af_netlink.c:1258 [inline]
netlink_sendskb+0x96/0x130 net/netlink/af_netlink.c:1264
netlink_unicast+0x3a6/0x990 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436
___sys_sendmsg+0x252/0x2e0 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg+0x19a/0x260 net/socket.c:2526
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9271e14a4b
RSP: 002b:00007ffdd797f718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000555b5d5129e0 RCX: 00007f9271e14a4b
RDX: 0000000000000000 RSI: 00007ffdd797f728 RDI: 0000000000000004
RBP: 0000555b5d531400 R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000000a5 R14: 0000000000000000 R15: 0000000000000000
task:kworker/u4:2 state:R running task stack:23000 pid: 154 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kasan_check_range+0x1ac/0x290 mm/kasan/generic.c:189
Code: 4c 89 d5 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 39 00 0f 85 a2 00 00 00 49 ff c1 48 ff cd 75 ee 5b <41> 5e 41 5f 5d c3 45 84 f6 75 61 41 f7 c6 00 ff 00 00 75 5d 41 f7
RSP: 0018:ffffc90001ff7a60 EFLAGS: 00000256
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8162e2bc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e0aa6e8
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1c154de
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920003fef58
R13: dffffc0000000000 R14: fffffbfff1c154de R15: ffff88801c540c80
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xcc/0x4f0 kernel/locking/lockdep.c:5594
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc1/0x5b0 net/batman-adv/network-coding.c:723
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread starved for 10555 jiffies! g6745 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:26752 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 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: 3837 Comm: dhcpcd Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lock_acquire+0x89/0x4f0 kernel/locking/lockdep.c:5591
Code: 8c 48 c7 44 24 50 f0 e1 62 81 4c 8d 64 24 40 49 c1 ec 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4b 89 04 2c 43 c7 44 2c 09 f2 f2 f2 00 <43> c7 44 2c 11 f3 f3 f3 f3 66 43 c7 44 2c 15 f3 f3 43 c6 44 2c 17
RSP: 0018:ffffc9000359f200 EFLAGS: 00000806
RAX: f2f2f200f1f1f1f1 RBX: ffff8880b8f3dfc0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b8f3dfc0
RBP: ffffc9000359f360 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006b3e48
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 00007ff856d33740(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f7f624ca0 CR3: 0000000025c95000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
local_lock_acquire+0x1d/0x70 include/linux/local_lock_internal.h:29
put_cpu_partial+0x6b/0x1a0 mm/slub.c:2556
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
____kasan_kmalloc+0x2f/0xf0 mm/kasan/common.c:479
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc_node_track_caller+0x195/0x390 mm/slub.c:4963
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x12c/0x590 net/core/skbuff.c:427
alloc_skb include/linux/skbuff.h:1162 [inline]
alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6170
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2533
unix_dgram_sendmsg+0x702/0x2090 net/unix/af_unix.c:1798
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1079
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff856dfdbf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffca3534d68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055b5153a9b60 RCX: 00007ff856dfdbf2
RDX: 0000000000000046 RSI: 00007ffca3534d80 RDI: 0000000000000005
RBP: 00007ffca3534d80 R08: 0000000000000008 R09: 0000000000000035
R10: 0000000000000000 R11: 0000000000000246 R12: 000055b4e53f9efc
R13: 00007ffca35351b0 R14: 000055b5154aab40 R15: 0000000000000001