rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8385 ticks this GP) idle=824c/1/0x4000000000000000 softirq=93560/93563 fqs=297
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1735105         11            0
rcu: 	cputime:    31617      20342           25   ==> 51970(ms)
rcu: 	(t=10500 jiffies g=118405 q=600 ncpus=2)
CPU: 0 PID: 23998 Comm: syz.1.4900 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:should_drop_frame net/mac80211/rx.c:108 [inline]
RIP: 0010:ieee80211_rx_monitor net/mac80211/rx.c:820 [inline]
RIP: 0010:ieee80211_rx_list+0xbef/0x3240 net/mac80211/rx.c:5430
Code: 87 bd 7a f7 45 39 fe 0f 82 b1 1d 00 00 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 6f 22 00 00 <45> 0f b7 75 00 45 89 f7 41 83 e7 0c bf 04 00 00 00 44 89 fe e8 e8
RSP: 0018:ffffc900000079c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000080 RCX: dffffc0000000000
RDX: ffff88802be05a00 RSI: 0000000000000010 RDI: 000000000000004c
RBP: ffffc90000007c10 R08: ffff888030298edf R09: 1ffff110060531db
R10: dffffc0000000000 R11: ffffed10060531dc R12: ffff8880668be3c0
R13: ffff888064e30390 R14: 000000000000004c R15: 0000000000000010
FS:  00007ff20ae156c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110e22fff2 CR3: 0000000061a65000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_rx_napi+0x1ae/0x3c0 net/mac80211/rx.c:5462
 ieee80211_rx include/net/mac80211.h:4974 [inline]
 ieee80211_handle_queued_frames+0x105/0x190 net/mac80211/main.c:319
 tasklet_action_common+0x2d4/0x460 kernel/softirq.c:809
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:_raw_spin_trylock+0x0/0x80 kernel/locking/spinlock.c:137
Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c 51 ff ff ff 48 89 df e8 03 b2 43 f7 e9 44 ff ff ff e8 a9 49 f6 ff cc cc cc cc cc cc cc cc cc <f3> 0f 1e fa 41 56 53 49 89 fe bb 01 00 00 00 bf 01 00 00 00 e8 67
RSP: 0018:ffffc900033f7668 EFLAGS: 00000286
RAX: 1ffffffff1955346 RBX: ffff8880b8c42100 RCX: df172bd2c9fee900
RDX: 0000000000000000 RSI: ffffffff8b1d5140 RDI: ffff8880b8c42100
RBP: ffff88813fffc310 R08: ffff88813fffad97 R09: 1ffff11027fff5b2
R10: dffffc0000000000 R11: ffffed1027fff5b3 R12: fffffffffffffff5
R13: dffffc0000000000 R14: ffffffff8caa9a30 R15: ffffc900033f7868
 spin_trylock include/linux/spinlock.h:361 [inline]
 rmqueue_pcplist mm/page_alloc.c:2781 [inline]
 rmqueue mm/page_alloc.c:2831 [inline]
 get_page_from_freelist+0x48e/0x22a0 mm/page_alloc.c:3218
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
 pagetable_alloc include/linux/mm.h:2900 [inline]
 pmd_alloc_one include/asm-generic/pgalloc.h:134 [inline]
 __pmd_alloc+0x9a/0x8c0 mm/memory.c:5599
 pmd_alloc include/linux/mm.h:2863 [inline]
 __handle_mm_fault mm/memory.c:5149 [inline]
 handle_mm_fault+0xb75/0x4a50 mm/memory.c:5353
 do_user_addr_fault+0x736/0x12d0 arch/x86/mm/fault.c:1371
 handle_page_fault arch/x86/mm/fault.c:1463 [inline]
 exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:__get_user_4+0x11/0x20 arch/x86/lib/getuser.S:81
Code: 48 c1 fa 3f 48 09 d0 0f 01 cb 0f b7 10 31 c0 0f 01 ca c3 90 90 90 90 90 90 f3 0f 1e fa 48 89 c2 48 c1 fa 3f 48 09 d0 0f 01 cb <8b> 10 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 c2
RSP: 0018:ffffc900033f7d98 EFLAGS: 00050202
RAX: 000000110e22fff2 RBX: ffff88802faf1dc0 RCX: df172bd2c9fee900
RDX: 0000000000000000 RSI: ffffffff8acae160 RDI: ffffffff8b1d5160
RBP: ffffc900033f7ed8 R08: ffffffff8f6c5aef R09: 1ffffffff1ed8b5d
R10: dffffc0000000000 R11: fffffbfff1ed8b5e R12: 00000000c004743e
R13: ffff88802faf1e98 R14: ffff88802fab8280 R15: 1ffff11005f57086
 ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1063 [inline]
 ppp_ioctl+0x5f9/0x1bc0 drivers/net/ppp/ppp_generic.c:731
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff209f9e1d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff20ae15028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff20a226090 RCX: 00007ff209f9e1d9
RDX: 000000110e22fff2 RSI: 00000000c004743e RDI: 000000000000008f
RBP: 00007ff20a035888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff20a226128 R14: 00007ff20a226090 R15: 00007fff0ebafe28
 </TASK>
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
net_ratelimit: 8534 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:06:fd:e1:ec:0b, vlan:0)