rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6320/1:b..l P10047/1:b..l
rcu: (detected by 1, t=10504 jiffies, g=34629, q=681 ncpus=2)
task:modprobe state:R running task stack:25416 pid:10047 tgid:10047 ppid:8961 task_flags:0x400000 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
irqentry_exit+0x36/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: b8 3d 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 22 0c 13 0f 0f 82 74 02 00 00 8b 35 ea 3d 13 0f 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 79 b8 3d 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90003286800 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e5c1120 RCX: 0000000099ada81e
RDX: 0000000000000000 RSI: ffffffff8de2758d RDI: ffffffff8c15fb80
RBP: 0000000000000002 R08: 5e62e53b1fc7f9c5 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
mas_topiary_node lib/maple_tree.c:2527 [inline]
mas_topiary_replace+0x1724/0x3520 lib/maple_tree.c:2634
mas_wmb_replace lib/maple_tree.c:2651 [inline]
mas_split+0xb39/0x11e0 lib/maple_tree.c:3390
mas_commit_b_node.isra.0+0x76/0xb0 lib/maple_tree.c:3410
mas_wr_bnode+0x13c/0x1c0 lib/maple_tree.c:4079
mas_wr_store_entry+0xefa/0x2550 lib/maple_tree.c:4111
mas_store_prealloc+0x771/0x1680 lib/maple_tree.c:5510
vma_iter_store_new mm/vma.h:508 [inline]
vma_complete+0x971/0xe80 mm/vma.c:354
__split_vma+0xc13/0x1070 mm/vma.c:568
split_vma mm/vma.c:598 [inline]
vma_modify+0xee1/0x2030 mm/vma.c:1631
vma_modify_flags+0x212/0x2d0 mm/vma.c:1649
mprotect_fixup+0x2b3/0xb10 mm/mprotect.c:819
do_mprotect_pkey+0x9ca/0xd50 mm/mprotect.c:993
__do_sys_mprotect mm/mprotect.c:1014 [inline]
__se_sys_mprotect mm/mprotect.c:1011 [inline]
__x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:1011
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5b411d2c7
RSP: 002b:00007ffe014c5a38 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007fe5b3df40c0 RCX: 00007fe5b411d2c7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007fe5b3df1000
RBP: 00007ffe014c5d00 R08: 0000000000000000 R09: 00007fe5b3e8fc90
R10: 00007fe5b3df40c0 R11: 0000000000000206 R12: 0000000000000030
R13: 0000013df061e1cf R14: 0000000000000000 R15: 00007fe5b4131310
task:udevd state:R running task stack:25320 pid:6320 tgid:6320 ppid:5216 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
irqentry_exit+0x36/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__orc_find+0x0/0xf0 arch/x86/kernel/unwind_orc.c:85
Code: 90 90 90 90 90 90 90 90 90 90 48 8b 07 c3 cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 57 41 56 41 55 49 89 cd 89 d1 41 54 4c 8d 64 8f fc 55 53 48 83
RSP: 0018:ffffc9000cc173b0 EFLAGS: 00000206
RAX: ffffffff915170d8 RBX: 0000000000000001 RCX: ffffffff82409494
RDX: 0000000000000011 RSI: ffffffff915170d8 RDI: ffffffff90c747a8
RBP: ffffc9000cc17470 R08: ffffffff9151713e R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000014094 R12: ffffc9000cc17478
R13: ffffc9000cc17428 R14: ffffc9000cc1745d R15: ffffffff82409494
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x2ec/0x20a0 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4365 [inline]
__kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4384
__kmemdup_nul mm/util.c:64 [inline]
kmemdup_nul+0x49/0xf0 mm/util.c:194
security_context_to_sid_core+0xc1/0x860 security/selinux/ss/services.c:1568
selinux_inode_post_setxattr+0x125/0x4a0 security/selinux/hooks.c:3449
security_inode_post_setxattr+0x222/0x240 security/security.c:2534
__vfs_setxattr_noperm+0x352/0x660 fs/xattr.c:238
__vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295
vfs_setxattr+0x145/0x360 fs/xattr.c:321
do_setxattr+0x145/0x180 fs/xattr.c:636
filename_setxattr+0x16b/0x1d0 fs/xattr.c:665
path_setxattrat+0x1de/0x2a0 fs/xattr.c:713
__do_sys_lsetxattr fs/xattr.c:754 [inline]
__se_sys_lsetxattr fs/xattr.c:750 [inline]
__x64_sys_lsetxattr+0xc9/0x140 fs/xattr.c:750
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f791871d57a
RSP: 002b:00007ffec6f00298 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 0000556fa251c2d0 RCX: 00007f791871d57a
RDX: 0000556fa251c2d0 RSI: 00007f7918f6b29c RDI: 00007ffec6f00de0
RBP: 0000556fa22d18d0 R08: 0000000000000000 R09: 0000556fa22d6450
R10: 000000000000001b R11: 0000000000000246 R12: 00007ffec6f00de0
R13: 0000000000000001 R14: 0000556f66f936d7 R15: 0000556fa2517f40
rcu: rcu_preempt kthread starved for 10502 jiffies! g34629 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:27784 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7058
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 10051 Comm: syz.0.1026 Not tainted 6.16.0-syzkaller-11241-g186f3edfdd41 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xe02/0x1600 kernel/smp.c:877
Code: 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 05 fe 0b 00 f3 90 41 0f b6 45 00 <40> 38 c5 7c 08 84 c0 0f 85 e0 05 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc90002f27580 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b8442000 RCX: ffffc90005399000
RDX: 0000000000080000 RSI: ffffffff81af8a7b RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffed1017088401 R14: 0000000000000001 R15: 0000000000000000
FS: 00007fd3586da6c0(0000) GS:ffff8881247c8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd357772920 CR3: 0000000056d5e000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1044
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2654 [inline]
smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2864
__static_call_transform+0x33b/0x740 arch/x86/kernel/static_call.c:111
arch_static_call_transform+0xb6/0xc0 arch/x86/kernel/static_call.c:163
__static_call_update+0xef/0x670 kernel/static_call_inline.c:147
tracepoint_update_call kernel/tracepoint.c:271 [inline]
tracepoint_add_func+0xa88/0xea0 kernel/tracepoint.c:312
tracepoint_probe_register_prio_may_exist+0xb9/0x100 kernel/tracepoint.c:435
tracepoint_probe_register_may_exist include/linux/tracepoint.h:50 [inline]
bpf_probe_register+0x189/0x200 kernel/trace/bpf_trace.c:2325
bpf_raw_tp_link_attach+0x2ec/0x630 kernel/bpf/syscall.c:4152
bpf_raw_tracepoint_open kernel/bpf/syscall.c:4183 [inline]
__sys_bpf+0x23c2/0x4de0 kernel/bpf/syscall.c:6071
__do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:6137
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd35778eb69
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:00007fd3586da038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd3579b5fa0 RCX: 00007fd35778eb69
RDX: 0000000000000018 RSI: 0000200000000200 RDI: 0000000000000011
RBP: 00007fd357811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd3579b5fa0 R15: 00007fff28c47558