rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3622/1:b.el P12943/1:b..l P46/1:b..l
(detected by 1, t=10502 jiffies, g=75637, q=31 ncpus=2)
task:kworker/u4:3 state:R running task stack:22936 pid:46 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6873
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:409 [inline]
RIP: 0010:batadv_nc_worker+0x17a/0x610 net/batman-adv/network-coding.c:719
Code: 05 be 0c 0a 04 01 48 c7 c7 00 e5 2d 8c be 19 03 00 00 48 c7 c2 40 e5 2d 8c e8 72 c0 e8 f6 48 89 e8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 ef e8 3c b7 5f f7 48 8b 6d 00 48 85 ed 74 51 48 81 c5
RSP: 0018:ffffc90000b77bf8 EFLAGS: 00000246
RAX: 1ffff1100b36fa93 RBX: ffff8880599c1a00 RCX: ffff88801f698000
RDX: 0000000000000000 RSI: ffffffff8b5f7340 RDI: ffffffff8b5f7300
RBP: ffff888059b7d498 R08: ffffffff8a82546d R09: fffffbfff225784d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888059490c80
R13: 0000000000000293 R14: ffff8880599c1a00 R15: dffffc0000000000
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:syz.2.1660 state:R running task stack:25976 pid:12943 ppid:8401 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6873
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215
Code: 00 0f 0b 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 58 16 16 0d 48 89 de 5b e9 07 8b 56 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d e4 c4 77 7e 65 8b 15 e5 c4 77 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90003f5f838 EFLAGS: 00000293
RAX: ffffffff8aa89751 RBX: dffffc0000000000 RCX: ffff888030f68000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003f5fa30 R08: ffffffff8aa896cb R09: ffffffff8aa88b14
R10: 0000000000000003 R11: ffff888030f68000 R12: ffffffff8c3175e1
R13: 0000000000000001 R14: 000000000000000c R15: ffffc90003f5f998
mas_validate_limits lib/maple_tree.c:7159 [inline]
mt_validate+0x2b01/0x5ad0 lib/maple_tree.c:7239
validate_mm_mt+0x165/0x670 mm/mmap.c:294
__split_vma+0x32/0x4c0 mm/mmap.c:2343
mprotect_fixup+0x6a2/0x840 mm/mprotect.c:617
do_mprotect_pkey+0x8b6/0xbe0 mm/mprotect.c:792
__do_sys_mprotect mm/mprotect.c:819 [inline]
__se_sys_mprotect mm/mprotect.c:816 [inline]
__x64_sys_mprotect+0x7c/0x90 mm/mprotect.c:816
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1d1418d227
RSP: 002b:00007ffe6719d3e8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f1d14fab6c0 RCX: 00007f1d1418d227
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f1d14f8c000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffe6719d540
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
task:udevd state:R running task stack:22760 pid:3622 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6730
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6754
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x128/0x130 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock kernel/sched/wait.c:140 [inline]
__wake_up_sync_key+0x121/0x1c0 kernel/sched/wait.c:208
sock_def_readable+0x15b/0x280 net/core/sock.c:3308
__netlink_sendskb net/netlink/af_netlink.c:1258 [inline]
netlink_sendskb+0x96/0x130 net/netlink/af_netlink.c:1264
netlink_unicast+0x399/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1859
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5d3/0x9a0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f125f524a4b
RSP: 002b:00007ffdf3439168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000055964f9e29e0 RCX: 00007f125f524a4b
RDX: 0000000000000000 RSI: 00007ffdf3439178 RDI: 0000000000000004
RBP: 000055964fa0d810 R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000000b5 R14: 0000000000000000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10588 jiffies! g75637 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12884 Comm: syz.0.1637 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:recalc_sigpending_tsk kernel/signal.c:156 [inline]
RIP: 0010:recalc_sigpending+0x4e/0x1c0 kernel/signal.c:184
Code: 60 05 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f2 d2 8b 00 48 8b 1b bd 00 00 9a 00 be 00 00 9a 00 48 21 de <31> ff e8 db 74 34 00 48 21 dd 74 0a e8 f1 70 34 00 e9 0c 01 00 00
RSP: 0018:ffffc90003e77a28 EFLAGS: 00000046
RAX: 1ffff11005d00bd4 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900155ba000 RSI: 0000000000000000 RDI: 0000000000080000
RBP: 00000000009a0000 R08: ffffffff81565364 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000011 R14: ffff88802e805940 R15: ffff88802e806260
FS: 00007f711c5036c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2ae20e CR3: 000000005f791000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dequeue_signal+0x183/0x590 kernel/signal.c:676
get_signal+0x5ed/0x17a0 kernel/signal.c:2751
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f711b78d169
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:00007f711c5030e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007f711b9a5fa8 RCX: 00007f711b78d169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f711b9a5fa8
RBP: 00007f711b9a5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f711b9a5fac
R13: 0000000000000000 R14: 00007ffd2e67b6d0 R15: 00007ffd2e67b7b8