------------[ cut here ]------------
WARNING: CPU: 0 PID: 14728 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
WARNING: CPU: 0 PID: 14728 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Modules linked in:
CPU: 0 PID: 14728 Comm: syz.3.2470 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Code: 24 4c 89 e7 e8 3e 42 c2 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 79 88 84 f7 0f 0b e9 f6 f7 ff ff e8 6d 88 84 f7 <0f> 0b e9 48 fb ff ff e8 61 88 84 f7 48 c7 c7 60 51 64 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a028b33 RBX: ffffffff8a027936 RCX: ffff88802e3cda00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802e3cda00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805ce2e3c0
R13: dffffc0000000000 R14: ffff88805ce2e8b0 R15: ffff88807b95c424
FS: 00007fd90aebf6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c3f74a0 CR3: 00000000671db000 CR4: 00000000003506f0
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5569
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
__run_hrtimer kernel/time/hrtimer.c:1750 [inline]
__hrtimer_run_queues+0x52a/0xc40 kernel/time/hrtimer.c:1814
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
handle_softirqs+0x280/0x820 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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_switch+0x81/0x120 kernel/kcov.c:349
Code: 00 00 00 b9 01 00 00 00 48 85 c0 0f 84 ae 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 05 e4 9c 7c 7e 45 31 c9 eb 08 <49> ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d d2 9c 7c 7e 41
RSP: 0018:ffffc900050265d0 EFLAGS: 00000293
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000003
RDX: ffffffff813b3d62 RSI: ffffffff8cfa0760 RDI: 0000000000000004
RBP: ffffc90005026718 R08: ffff88802e3cda00 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: ffffc900050266c8
R13: dffffc0000000000 R14: 0000000000000004 R15: ffffffff8f1d438c
unwind_next_frame+0x742/0x2970 arch/x86/kernel/unwind_orc.c:515
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
save_stack+0x125/0x230 mm/page_owner.c:128
__set_page_owner+0x1d/0x60 mm/page_owner.c:192
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
__folio_alloc+0x10/0x20 mm/page_alloc.c:4518
vma_alloc_folio+0x47a/0x8f0 mm/mempolicy.c:2242
shmem_alloc_folio+0x1a9/0x2a0 mm/shmem.c:1679
shmem_alloc_and_acct_folio+0x1e6/0x6d0 mm/shmem.c:1704
shmem_get_folio_gfp+0xcde/0x2aa0 mm/shmem.c:2041
shmem_get_folio mm/shmem.c:2164 [inline]
shmem_write_begin+0xf2/0x420 mm/shmem.c:2706
generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4031
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
__kernel_write_iter+0x28c/0x690 fs/read_write.c:517
dump_emit_page fs/coredump.c:957 [inline]
dump_user_range+0x420/0x860 fs/coredump.c:984
elf_core_dump+0x31d0/0x3770 fs/binfmt_elf.c:2184
do_coredump+0x17cc/0x24d0 fs/coredump.c:833
get_signal+0x1133/0x13f0 kernel/signal.c:2888
arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fd909f9bf81
Code: 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fd90a216090 RCX: 00007fd909f9bf79
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fd90a0327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fd90a216128 R14: 00007fd90a216090 R15: 00007ffe109ca018
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 b9 01 00 00 00 add %bh,0x1(%rcx)
8: 48 85 c0 test %rax,%rax
b: 0f 84 ae 00 00 00 je 0xbf
11: 41 57 push %r15
13: 41 56 push %r14
15: 41 54 push %r12
17: 53 push %rbx
18: 48 8b 54 24 20 mov 0x20(%rsp),%rdx
1d: 65 4c 8b 05 e4 9c 7c mov %gs:0x7e7c9ce4(%rip),%r8 # 0x7e7c9d09
24: 7e
25: 45 31 c9 xor %r9d,%r9d
28: eb 08 jmp 0x32
* 2a: 49 ff c1 inc %r9 <-- trapping instruction
2d: 4c 39 c8 cmp %r9,%rax
30: 74 77 je 0xa9
32: 4e 8b 54 ce 10 mov 0x10(%rsi,%r9,8),%r10
37: 65 44 8b 1d d2 9c 7c mov %gs:0x7e7c9cd2(%rip),%r11d # 0x7e7c9d11
3e: 7e
3f: 41 rex.B