------------[ cut here ]------------
WARNING: CPU: 0 PID: 4600 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 0 PID: 4600 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Modules linked in:
CPU: 0 PID: 4600 Comm: syz.3.62 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Code: 24 4c 89 e7 e8 fe 72 09 f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 f9 d2 d0 f7 0f 0b e9 f6 f7 ff ff e8 ed d2 d0 f7 <0f> 0b e9 48 fb ff ff e8 e1 d2 d0 f7 48 c7 c7 50 09 fb 8d 4c 89 e6
RSP: 0018:ffffc90000007a30 EFLAGS: 00010246
RAX: ffffffff89b1b3c3 RBX: ffffffff89b1a1c6 RCX: ffff88801a775940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801a775940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888053cba228
R13: dffffc0000000000 R14: ffff888053cba760 R15: ffff8880264c2424
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe87057cff8 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5472
ieee80211_beacon_get include/net/mac80211.h:5335 [inline]
mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
__run_hrtimer kernel/time/hrtimer.c:1747 [inline]
__hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:228 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:240 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xc0/0x920 kernel/locking/lockdep.c:5673
Code: 0f 85 c7 05 00 00 3b 1d fe 3c bb 0c 0f 83 3a 05 00 00 41 89 de c1 eb 06 48 8d 3c dd 28 0c 20 8e be 08 00 00 00 e8 30 c3 6e 00 <4c> 0f a3 35 d0 3a bb 0c 73 0d e8 c1 af 07 00 84 c0 0f 84 41 05 00
RSP: 0018:ffffc90004bdefa0 EFLAGS: 00000256
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8164d150
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e200c28
RBP: ffffc90004bdf0b0 R08: ffffffff8e200c2f R09: 1ffffffff1c40185
R10: dffffc0000000000 R11: fffffbfff1c40186 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200097be00
page_table_check_free include/linux/page_table_check.h:46 [inline]
free_pages_prepare mm/page_alloc.c:1487 [inline]
free_pcp_prepare mm/page_alloc.c:1536 [inline]
free_unref_page_prepare+0x8c4/0x9a0 mm/page_alloc.c:3413
free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3554
release_pages+0x1fa6/0x2220 mm/swap.c:1035
__pagevec_release+0x6d/0xe0 mm/swap.c:1055
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x7c2/0x20c0 mm/shmem.c:946
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
evict+0x4c9/0x8d0 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfa/0x1d0 fs/dcache.c:918
__fput+0x5e0/0x920 fs/file_table.c:328
task_work_run+0x1d0/0x260 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x982/0x2480 kernel/exit.c:881
do_group_exit+0x217/0x2d0 kernel/exit.c:1023
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f847df9ce59
Code: Unable to access opcode bytes at 0x7f847df9ce2f.
RSP: 002b:00007f847eea70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f847e216188 RCX: 00007f847df9ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f847e216188
RBP: 00007f847e216180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f847e216218 R14: 00007ffd3885da80 R15: 00007ffd3885db68
----------------
Code disassembly (best guess):
0: 0f 85 c7 05 00 00 jne 0x5cd
6: 3b 1d fe 3c bb 0c cmp 0xcbb3cfe(%rip),%ebx # 0xcbb3d0a
c: 0f 83 3a 05 00 00 jae 0x54c
12: 41 89 de mov %ebx,%r14d
15: c1 eb 06 shr $0x6,%ebx
18: 48 8d 3c dd 28 0c 20 lea -0x71dff3d8(,%rbx,8),%rdi
1f: 8e
20: be 08 00 00 00 mov $0x8,%esi
25: e8 30 c3 6e 00 call 0x6ec35a
* 2a: 4c 0f a3 35 d0 3a bb bt %r14,0xcbb3ad0(%rip) # 0xcbb3b02 <-- trapping instruction
31: 0c
32: 73 0d jae 0x41
34: e8 c1 af 07 00 call 0x7affa
39: 84 c0 test %al,%al
3b: 0f .byte 0xf
3c: 84 41 05 test %al,0x5(%rcx)