rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6453/1:b..l P6279/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=22461, q=563 ncpus=2)
task:syz-executor state:R running task stack:22160 pid:6279 tgid:6279 ppid:6275 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7507
irqentry_exit_to_kernel_mode_preempt+0x14/0x70 include/linux/irq-entry-common.h:476
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x680 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_check_range+0x1d1/0x2c0 mm/kasan/generic.c:200
Code: 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 7c 49 ff c3 49 ff cc 75 f2 5b 41 5c 41 5d 41 5e 41 5f 5d 0a c6 90 09 cc 45 84 ff 0f 85 a1 00 00 00 41 f7 c7 00 ff 00 00
RSP: 0018:ffffc90003aa6a50 EFLAGS: 00000256
RAX: 1ffff92000754d01 RBX: 0000000000000010 RCX: ffffffff817760e3
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90003aa6bf8
RBP: 0000000000000000 R08: ffffc90003aa6c07 R09: 1ffff92000754d80
R10: dffffc0000000000 R11: fffff52000754d81 R12: ffffc90003aa6ba8
R13: 1ffff92000754d77 R14: ffffc90003aa6bf8 R15: ffffc90003aa6bf0
__asan_memset+0x22/0x50 mm/kasan/shadow.c:84
unwind_next_frame+0xf33/0x2550 arch/x86/kernel/unwind_orc.c:621
__unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4569 [inline]
slab_alloc_node mm/slub.c:4898 [inline]
kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4917
__d_alloc+0x37/0x6f0 fs/dcache.c:1807
d_alloc+0x4b/0x190 fs/dcache.c:1886
lookup_one_qstr_excl+0xd8/0x360 fs/namei.c:1801
__start_dirop fs/namei.c:2916 [inline]
start_dirop+0x5c/0x90 fs/namei.c:2938
simple_start_creating+0xcc/0x110 fs/libfs.c:2305
debugfs_start_creating+0xdb/0x1a0 fs/debugfs/inode.c:394
__debugfs_create_file+0x6f/0x400 fs/debugfs/inode.c:428
debugfs_create_file_full+0x3f/0x60 fs/debugfs/inode.c:460
mac80211_hwsim_new_radio+0x3561/0x5ba0 drivers/net/wireless/virtual/mac80211_hwsim.c:6036
hwsim_new_radio_nl+0xf6a/0x1c00 drivers/net/wireless/virtual/mac80211_hwsim.c:6726
genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:786 [inline]
__sock_sendmsg net/socket.c:801 [inline]
__sys_sendto+0x672/0x710 net/socket.c:2264
__do_sys_sendto net/socket.c:2271 [inline]
__se_sys_sendto net/socket.c:2267 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2267
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b2db5b7ce
RSP: 002b:00007fff1d6dc0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00005555844a8500 RCX: 00007f0b2db5b7ce
RDX: 0000000000000024 RSI: 00007f0b2e934670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff1d6dc134 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f0b2e934670 R15: 0000000000000000
task:sed state:R running task stack:24312 pid:6453 tgid:6453 ppid:6452 task_flags:0x400000 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7364
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:190
spin_unlock include/linux/spinlock.h:390 [inline]
zap_pte_range mm/memory.c:1948 [inline]
zap_pmd_range mm/memory.c:2004 [inline]
zap_pud_range mm/memory.c:2032 [inline]
zap_p4d_range mm/memory.c:2053 [inline]
__zap_vma_range+0x3d17/0x4b40 mm/memory.c:2093
unmap_vmas+0x379/0x530 mm/memory.c:2162
unmap_region+0x208/0x330 mm/vma.c:488
vms_clear_ptes mm/vma.c:1303 [inline]
vms_clean_up_area mm/vma.c:1315 [inline]
__mmap_setup mm/vma.c:2476 [inline]
__mmap_region mm/vma.c:2753 [inline]
mmap_region+0xca1/0x2280 mm/vma.c:2856
do_mmap+0xc39/0x10c0 mm/mmap.c:560
vm_mmap_pgoff+0x2c9/0x4f0 mm/util.c:581
ksys_mmap_pgoff+0x51e/0x760 mm/mmap.c:606
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4317be0242
RSP: 002b:00007ffcec92b9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f431793a000 RCX: 00007f4317be0242
RDX: 0000000000000005 RSI: 000000000014e000 RDI: 00007f431793a000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000028000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffcec92ba38
R13: 00007f4317bb45f0 R14: 00007ffcec92c220 R15: 00000fff9d925740
rcu: rcu_preempt kthread starved for 10592 jiffies! g22461 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:27296 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
__schedule_loop kernel/sched/core.c:7262 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7277
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 5b 9f 02 e9 93 f3 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d b3 70 2b 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 00000246
RAX: 000000000009957d RBX: ffffffff819ad70a RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8e31177c RDI: ffffffff8c4a9e60
RBP: ffffc90000197f10 R08: ffff8880b87339db R09: 1ffff110170e673b
R10: dffffc0000000000 R11: ffffed10170e673c R12: 0000000000000001
R13: 1ffff11003bde000 R14: 0000000000000001 R15: 1ffff11003bde000
FS: 0000000000000000(0000) GS:ffff888124eec000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4317baf4e8 CR3: 000000007570c000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:766 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x36a/0x5f0 kernel/sched/idle.c:352
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:451
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x147