------------[ cut here ]------------
WARNING: CPU: 1 PID: 23747 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
WARNING: CPU: 1 PID: 23747 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Modules linked in:
CPU: 1 PID: 23747 Comm: syz.0.5049 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 2e a7 c1 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 09 ee 83 f7 0f 0b e9 f6 f7 ff ff e8 fd ed 83 f7 <0f> 0b e9 48 fb ff ff e8 f1 ed 83 f7 48 c7 c7 00 61 64 8e 4c 89 e6
RSP: 0018:ffffc900001f0a18 EFLAGS: 00010246
RAX: ffffffff8a032e63 RBX: ffffffff8a031c66 RCX: ffff88807b730000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807b730000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88807767e3c0
R13: dffffc0000000000 R14: ffff88807767e8b0 R15: ffff88801d73c824
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1307e9e80 CR3: 0000000069dc3000 CR4: 00000000003506e0
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+0x520/0xc40 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:__nr_to_section include/linux/mmzone.h:1849 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1957 [inline]
RIP: 0010:lookup_page_ext mm/page_ext.c:237 [inline]
RIP: 0010:page_ext_get+0x106/0x2b0 mm/page_ext.c:509
Code: ff 03 00 00 00 4c 89 f6 e8 87 f4 9c ff 4c 89 f0 48 c1 e8 22 0f 85 95 01 00 00 48 c7 c0 a0 28 32 97 48 c1 e8 03 42 80 3c 20 00 <74> 0c 48 c7 c7 a0 28 32 97 e8 0c 1f f5 ff 48 8b 05 55 fc 47 15 48
RSP: 0018:ffffc9000b7d6918 EFLAGS: 00000246
RAX: 1ffffffff2e64514 RBX: ffffffff81ea2b52 RCX: ffff88807b730000
RDX: 0000000000000000 RSI: 0000000000056052 RDI: 00000003ffffffff
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff22382a0
R10: dffffc0000000000 R11: fffffbfff22382a1 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000056052 R15: ffffea0001581480
__set_page_owner+0x28/0x60 mm/page_owner.c:194
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:4500
__folio_alloc+0x10/0x20 mm/page_alloc.c:4532
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: 0033:0x7fd130652777
Code: e8 8e fa ff ff 89 f2 48 8d 3d 0d 41 1b 00 48 8d 35 f4 fa 1d 00 31 c0 e8 e7 f8 ff ff 0f 1f 80 00 00 00 00 53 89 fb 48 83 ec 10 <64> 8b 04 25 a4 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007fd1315af120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007fd13079c799
RDX: 00007fd1315af140 RSI: 00007fd1315af270 RDI: 000000000000000b
RBP: 00007fd130832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007fd130a16128 R14: 00007fd130a16090 R15: 00007ffdaff2fbe8
----------------
Code disassembly (best guess):
0: ff 03 incl (%rbx)
2: 00 00 add %al,(%rax)
4: 00 4c 89 f6 add %cl,-0xa(%rcx,%rcx,4)
8: e8 87 f4 9c ff call 0xff9cf494
d: 4c 89 f0 mov %r14,%rax
10: 48 c1 e8 22 shr $0x22,%rax
14: 0f 85 95 01 00 00 jne 0x1af
1a: 48 c7 c0 a0 28 32 97 mov $0xffffffff973228a0,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
* 2a: 74 0c je 0x38 <-- trapping instruction
2c: 48 c7 c7 a0 28 32 97 mov $0xffffffff973228a0,%rdi
33: e8 0c 1f f5 ff call 0xfff51f44
38: 48 8b 05 55 fc 47 15 mov 0x1547fc55(%rip),%rax # 0x1547fc94
3f: 48 rex.W