rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10026/1:b..l P6652/1:b..l P5036/1:b..l
(detected by 1, t=10503 jiffies, g=53381, q=43 ncpus=2)
task:kworker/u4:21 state:R running task stack:22688 pid:5036 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x20f/0x490 kernel/locking/lockdep.c:5666
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 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b
RSP: 0018:ffffc90004bafac0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ac0e9bdec6fae500
RDX: 0000000000000000 RSI: ffffffff8a6c1180 RDI: ffffffff8abf1260
RBP: ffffc90004bafbc8 R08: dffffc0000000000 R09: fffffbfff2117049
R10: fffffbfff2117049 R11: 1ffffffff2117048 R12: 0000000000000001
R13: 1ffff92000975f64 R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xeb/0x600 net/batman-adv/network-coding.c:719
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:udevd state:R running task stack:23584 pid:6652 ppid:3623 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:mas_validate_limits lib/maple_tree.c:7141 [inline]
RIP: 0010:mt_validate+0x1c7d/0x4c90 lib/maple_tree.c:7239
Code: f7 4c 8b b4 24 40 01 00 00 4c 89 ff 4c 89 f6 e8 79 f4 83 f7 4d 39 f7 0f 82 1f 01 00 00 e8 8b f2 83 f7 4c 8b b4 24 48 01 00 00 <4c> 89 ff 4c 89 f6 e8 58 f4 83 f7 4d 39 f7 0f 87 7a 01 00 00 e8 6a
RSP: 0018:ffffc90003c77720 EFLAGS: 00000293
RAX: ffffffff89fce485 RBX: 000000000000000a RCX: ffff88807b559dc0
RDX: 0000000000000000 RSI: 00007f3b957f1000 RDI: 00007f3b95886fff
RBP: ffffc90003c778f0 R08: ffff88807b559dc0 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888064d4b280 R14: 00007f3b95887fff R15: 00007f3b95886fff
validate_mm_mt+0xcd/0x420 mm/mmap.c:294
validate_mm+0xcc/0x2b0 mm/mmap.c:331
do_mas_align_munmap+0xfad/0x1220 mm/mmap.c:2587
do_mas_munmap+0x240/0x2b0 mm/mmap.c:2638
__vm_munmap+0x18d/0x290 mm/mmap.c:2924
__do_sys_munmap mm/mmap.c:2949 [inline]
__se_sys_munmap mm/mmap.c:2946 [inline]
__x64_sys_munmap+0x5c/0x70 mm/mmap.c:2946
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3b9511e097
RSP: 002b:00007ffcc29f22e8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055bd6d4c92e0 RCX: 00007f3b9511e097
RDX: 000055bd6d4c54e8 RSI: 0000000000000200 RDI: 00007f3b95763000
RBP: 0000000000000012 R08: 000055bd6d4c92b0 R09: 0000000000000003
R10: 0000000000000040 R11: 0000000000000246 R12: 000055bd6d4c8ce0
R13: 00007f3b9584f39c R14: 0000000000002400 R15: 0000000000000009
task:syz.0.1278 state:R running task stack:23584 pid:10026 ppid:4251 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:xas_load+0x6c/0x140 lib/xarray.c:-1
Code: 89 dc 41 83 e4 03 bf 02 00 00 00 4c 89 e6 e8 fb ea 7e f7 48 81 fb 01 10 00 00 0f 82 b2 00 00 00 41 83 fc 02 0f 85 a8 00 00 00 <48> 8b 44 24 10 42 0f b6 04 30 84 c0 75 5c 4c 8d 7b fe 48 8b 04 24
RSP: 0018:ffffc90003d177d0 EFLAGS: 00000246
RAX: ffffffff8a01eff5 RBX: ffff88807a853c82 RCX: ffff88807a051dc0
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc90003d17940 R08: dffffc0000000000 R09: fffffbfff2117049
R10: fffffbfff2117049 R11: 1ffffffff2117048 R12: 0000000000000002
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc90003d17880
mapping_get_entry mm/filemap.c:1881 [inline]
__filemap_get_folio+0x1bb/0xdd0 mm/filemap.c:1943
shmem_get_folio_gfp+0x310/0x3400 mm/shmem.c:1881
shmem_get_folio mm/shmem.c:2072 [inline]
shmem_write_begin+0xee/0x3f0 mm/shmem.c:2556
generic_perform_write+0x2db/0x560 mm/filemap.c:3846
__generic_file_write_iter+0x172/0x430 mm/filemap.c:3974
generic_file_write_iter+0xab/0x2e0 mm/filemap.c:4006
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x44c/0x960 fs/read_write.c:584
ksys_write+0x143/0x240 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa3eb38d41f
RSP: 002b:00007fa3ec173df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fa3eb38d41f
RDX: 0000000001000000 RSI: 00007fa3e0bf7000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600
R10: 0000200000009682 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fa3ec173ef0 R14: 00007fa3ec173eb0 R15: 00007fa3e0bf7000
rcu: rcu_preempt kthread starved for 10603 jiffies! g53381 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:27840 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 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:
CPU: 1 PID: 10037 Comm: syz.5.1280 Not tainted 6.1.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:206
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 df 65 f8 02 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000457fcb0 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: ffffffff8c3d0b78 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520008aff85
R10: fffff520008aff85 R11: 1ffff920008aff84 R12: ffff8880b8f33e01
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000020
FS: 00007f6b4e83d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3bd40a078 CR3: 0000000075732000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_irq_work_raise+0x82/0xd0 arch/x86/kernel/irq_work.c:31
irq_work_queue+0x95/0x140 kernel/irq_work.c:114
bpf_send_signal_common+0x2b2/0x420 kernel/trace/bpf_trace.c:879
____bpf_send_signal kernel/trace/bpf_trace.c:888 [inline]
bpf_send_signal+0x15/0x20 kernel/trace/bpf_trace.c:886
bpf_prog_7ba5217f62dcd359+0x38/0x3c
bpf_dispatcher_nop_func include/linux/bpf.h:1001 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
bpf_trace_run2+0x1cd/0x3b0 kernel/trace/bpf_trace.c:2324
__bpf_trace_sys_enter+0x60/0x70 include/trace/events/syscalls.h:18
trace_sys_enter+0x6b/0x80 include/trace/events/syscalls.h:18
syscall_trace_enter+0xf0/0x150 kernel/entry/common.c:81
do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:77
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6b4d98e969
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:00007f6b4e83d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f6b4dbb5fa8 RCX: 00007f6b4d98e969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6b4dbb5fa8
RBP: 00007f6b4dbb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6b4dbb5fac
R13: 0000000000000000 R14: 00007ffcfd98d230 R15: 00007ffcfd98d318