------------[ cut here ]------------
WARNING: CPU: 1 PID: 4195 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 4195 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 4195 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Code: 2a f8 0f 0b 4f 89 64 2f 04 4f 89 64 2f 0c 43 c6 44 2f 14 f8 e9 19 fe ff ff e8 2d 0c 2a f8 0f 0b e9 03 ef ff ff e8 21 0c 2a f8 <0f> 0b e9 76 f2 ff ff e8 a5 af 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90000dd08e0 EFLAGS: 00010246
RAX: ffffffff894f29ef RBX: ffff88805e2fa268 RCX: ffff8880799d5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0b08 R08: ffff8880799d5940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888063680e00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba12c
FS: 000055559104e500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94f63ac000 CR3: 00000000627e3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202
ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:unwind_get_return_address+0x63/0x80 arch/x86/kernel/unwind_orc.c:324
Code: 48 89 df e8 3f 39 89 00 48 8b 3b e8 27 bd 1a 00 85 c0 74 14 43 80 3c 37 00 74 08 48 89 df e8 24 39 89 00 48 8b 03 eb 02 31 c0 <5b> 41 5e 41 5f c3 89 d9 80 e1 07 80 c1 03 38 c1 7c ad 48 89 df e8
RSP: 0018:ffffc90002edf2a8 EFLAGS: 00000246
RAX: ffffffff814fd6e5 RBX: ffffc90002edf310 RCX: 0000000080000001
RDX: ffffc90002edf301 RSI: ffffc90002edfe78 RDI: ffffffff814fd6e5
RBP: ffffc90002edf350 R08: ffffc90002edf327 R09: ffffc90002edf318
R10: dffffc0000000000 R11: fffff520005dbe65 R12: ffff8880799d5940
R13: 1ffff1100f33abd8 R14: dffffc0000000000 R15: 1ffff920005dbe62
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 mm/page_owner.c:119
__reset_page_owner+0x51/0x180 mm/page_owner.c:140
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page_list+0x119/0x820 mm/page_alloc.c:3433
release_pages+0x186c/0x1be0 mm/swap.c:963
__pagevec_release+0x6d/0xe0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
shmem_undo_range+0x62b/0x1930 mm/shmem.c:964
shmem_truncate_range mm/shmem.c:1063 [inline]
shmem_evict_inode+0x220/0xa40 mm/shmem.c:1145
evict+0x4c9/0x8d0 fs/inode.c:647
__dentry_kill+0x431/0x650 fs/dcache.c:586
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xd8/0x1a0 fs/dcache.c:893
__fput+0x5ee/0x930 fs/file_table.c:319
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7b3362d097
Code: a2 c7 05 5c 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff144294f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f7b336c11ca RCX: 00007f7b3362d097
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff144295b0
RBP: 00007fff144295b0 R08: 00007fff1442a5b0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff1442a640
R13: 00007f7b336c11ca R14: 000000000003c60e R15: 00007fff1442a680
----------------
Code disassembly (best guess):
0: 48 89 df mov %rbx,%rdi
3: e8 3f 39 89 00 call 0x893947
8: 48 8b 3b mov (%rbx),%rdi
b: e8 27 bd 1a 00 call 0x1abd37
10: 85 c0 test %eax,%eax
12: 74 14 je 0x28
14: 43 80 3c 37 00 cmpb $0x0,(%r15,%r14,1)
19: 74 08 je 0x23
1b: 48 89 df mov %rbx,%rdi
1e: e8 24 39 89 00 call 0x893947
23: 48 8b 03 mov (%rbx),%rax
26: eb 02 jmp 0x2a
28: 31 c0 xor %eax,%eax
* 2a: 5b pop %rbx <-- trapping instruction
2b: 41 5e pop %r14
2d: 41 5f pop %r15
2f: c3 ret
30: 89 d9 mov %ebx,%ecx
32: 80 e1 07 and $0x7,%cl
35: 80 c1 03 add $0x3,%cl
38: 38 c1 cmp %al,%cl
3a: 7c ad jl 0xffffffe9
3c: 48 89 df mov %rbx,%rdi
3f: e8 .byte 0xe8