------------[ cut here ]------------
WARNING: CPU: 0 PID: 8480 at net/mac80211/tx.c:5048 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5048 [inline]
WARNING: CPU: 0 PID: 8480 at net/mac80211/tx.c:5048 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5459
Modules linked in:
CPU: 0 PID: 8480 Comm: syz.4.815 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5048 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5459
Code: f7 4c 89 ef e8 50 38 b8 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 1b 4c 7a f7 0f 0b e9 61 f8 ff ff e8 0f 4c 7a f7 <0f> 0b e9 85 fb ff ff e8 03 4c 7a f7 48 c7 c7 60 b8 65 8e 4c 89 e6
RSP: 0000:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a0d2611 RBX: dffffc0000000000 RCX: ffff88802738bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802738bc00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805ce66440
R13: ffff88805d949824 R14: ffff88805ce66930 R15: ffff88805d949800
FS: 00007f832e3f66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe70 CR3: 000000007d145000 CR4: 00000000003506f0
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5586
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x225/0x4c0 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:1754 [inline]
__hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
RIP: 0010:unwind_next_frame+0xf0e/0x2990 arch/x86/kernel/unwind_orc.c:585
Code: 20 c1 4d 39 f7 0f 97 c0 84 c1 4c 89 f5 0f 84 33 02 00 00 48 89 6c 24 30 48 8d 45 08 48 39 d8 0f 97 c1 4c 39 f8 0f 96 c0 84 c1 <48> 8b 6c 24 10 4d 8d 75 10 0f 84 bc 05 00 00 e8 2e bf 4b 00 49 bf
RSP: 0000:ffffc9000de165d8 EFLAGS: 00000202
RAX: ffffc9000de16c01 RBX: ffffc9000de10000 RCX: 0000000000000001
RDX: ffff88802738bc00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000de16c58 R08: ffff88802738bc00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff92001bc2cd7
R13: ffffc9000de166a8 R14: ffffc9000de16c58 R15: ffffc9000de18000
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:1582
prep_new_page mm/page_alloc.c:1589 [inline]
get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
__folio_alloc+0x10/0x20 mm/page_alloc.c:4533
vma_alloc_folio+0x474/0x8f0 mm/mempolicy.c:2240
shmem_alloc_folio+0x1a9/0x2a0 mm/shmem.c:1679
shmem_alloc_and_acct_folio+0x1cb/0x6c0 mm/shmem.c:1704
shmem_get_folio_gfp+0xe1d/0x2b40 mm/shmem.c:2041
shmem_get_folio mm/shmem.c:2164 [inline]
shmem_write_begin+0xf2/0x430 mm/shmem.c:2706
generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
__kernel_write_iter+0x29f/0x6d0 fs/read_write.c:517
dump_emit_page fs/coredump.c:958 [inline]
dump_user_range+0x418/0x840 fs/coredump.c:985
elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
do_coredump+0x1791/0x24a0 fs/coredump.c:834
get_signal+0x10da/0x1390 kernel/signal.c:2897
arch_do_signal_or_restart+0xc2/0x7b0 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: 0033:0x7f833019e0e1
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: 00007f8330426090 RCX: 00007f833019e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f8330235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f8330426128 R14: 00007f8330426090 R15: 00007ffc04a519c8
----------------
Code disassembly (best guess):
0: 20 c1 and %al,%cl
2: 4d 39 f7 cmp %r14,%r15
5: 0f 97 c0 seta %al
8: 84 c1 test %al,%cl
a: 4c 89 f5 mov %r14,%rbp
d: 0f 84 33 02 00 00 je 0x246
13: 48 89 6c 24 30 mov %rbp,0x30(%rsp)
18: 48 8d 45 08 lea 0x8(%rbp),%rax
1c: 48 39 d8 cmp %rbx,%rax
1f: 0f 97 c1 seta %cl
22: 4c 39 f8 cmp %r15,%rax
25: 0f 96 c0 setbe %al
28: 84 c1 test %al,%cl
* 2a: 48 8b 6c 24 10 mov 0x10(%rsp),%rbp <-- trapping instruction
2f: 4d 8d 75 10 lea 0x10(%r13),%r14
33: 0f 84 bc 05 00 00 je 0x5f5
39: e8 2e bf 4b 00 call 0x4bbf6c
3e: 49 rex.WB
3f: bf .byte 0xbf