------------[ cut here ]------------
WARNING: CPU: 0 PID: 5066 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 0 PID: 5066 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Modules linked in:
CPU: 0 PID: 5066 Comm: syz.2.141 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Code: ff ff ff e8 40 d3 e3 f7 0f 0b 48 8b 7c 24 20 e8 04 90 7f fe e9 dd e9 ff ff e8 2a d3 e3 f7 0f 0b e9 f1 ee ff ff e8 1e d3 e3 f7 <0f> 0b e9 61 f2 ff ff e8 12 d3 e3 f7 48 c7 c7 f0 73 fa 8d 4c 89 f6
RSP: 0018:ffffc900000078a0 EFLAGS: 00010246
RAX: ffffffff899d0342 RBX: 0000000000000000 RCX: ffff88807b66d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007aa8 R08: ffff88807b66d940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff92000000f2c
R13: dffffc0000000000 R14: ffff8880740f2258 R15: ffff8880769ec200
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f633cb57f98 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352
ieee80211_beacon_get include/net/mac80211.h:5264 [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+0x554/0xd60 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 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:deref_stack_reg+0x1cf/0x230 arch/x86/kernel/unwind_orc.c:362
Code: 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 c3 7e 98 00 4c 89 33 b0 01 eb 02 31 c0 48 83 c4 20 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c b8 fe ff
RSP: 0018:ffffc9000d93ed10 EFLAGS: 00000282
RAX: 1ffff92001b27d01 RBX: ffffc9000d93ee08 RCX: 0000000000000001
RDX: ffffc9000d93ee48 RSI: dffffc0000000000 RDI: ffffc9000d93f0d0
RBP: 1ffff92001b27dc1 R08: ffffc9000d93f0d0 R09: ffffc9000d93ee58
R10: fffff52001b27dcd R11: 1ffff92001b27dcb R12: ffffffff8eaa37e1
R13: dffffc0000000000 R14: dffffc0000000000 R15: dffffc0000000000
unwind_next_frame+0x1758/0x20b0 arch/x86/kernel/unwind_orc.c:-1
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
save_stack+0xf3/0x1e0 mm/page_owner.c:127
__reset_page_owner+0x51/0x1a0 mm/page_owner.c:148
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1459 [inline]
free_pcp_prepare mm/page_alloc.c:1509 [inline]
free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525
release_pages+0x1f92/0x2200 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+0x75b/0x2050 mm/shmem.c:946
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x248/0xa40 mm/shmem.c:1171
evict+0x485/0x870 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+0x1ca/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x93e/0x2400 kernel/exit.c:880
do_group_exit+0x217/0x2d0 kernel/exit.c:1022
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xb7/0x1240 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:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f633bd8f6c9
Code: Unable to access opcode bytes at 0x7f633bd8f69f.
RSP: 002b:00007f633cb58038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f633bfe6090 RCX: 00007f633bd8f6c9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f633be11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f633bfe6128 R14: 00007f633bfe6090 R15: 00007fff816e5358
----------------
Code disassembly (best guess):
0: 24 18 and $0x18,%al
2: 48 89 d8 mov %rbx,%rax
5: 48 c1 e8 03 shr $0x3,%rax
9: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
e: 74 08 je 0x18
10: 48 89 df mov %rbx,%rdi
13: e8 c3 7e 98 00 call 0x987edb
18: 4c 89 33 mov %r14,(%rbx)
1b: b0 01 mov $0x1,%al
1d: eb 02 jmp 0x21
1f: 31 c0 xor %eax,%eax
21: 48 83 c4 20 add $0x20,%rsp
25: 5b pop %rbx
26: 41 5c pop %r12
28: 41 5d pop %r13
* 2a: 41 5e pop %r14 <-- trapping instruction
2c: 41 5f pop %r15
2e: 5d pop %rbp
2f: c3 ret
30: 44 89 f9 mov %r15d,%ecx
33: 80 e1 07 and $0x7,%cl
36: 80 c1 03 add $0x3,%cl
39: 38 c1 cmp %al,%cl
3b: 0f .byte 0xf
3c: 8c .byte 0x8c
3d: b8 .byte 0xb8
3e: fe (bad)
3f: ff .byte 0xff