------------[ cut here ]------------
WARNING: CPU: 1 PID: 10561 at net/mac80211/tx.c:4981 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4981 [inline]
WARNING: CPU: 1 PID: 10561 at net/mac80211/tx.c:4981 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5382
Modules linked in:
CPU: 1 PID: 10561 Comm: syz.6.1371 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4981 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5382
Code: f7 4c 89 ef e8 60 37 01 f8 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 8b 6a c8 f7 0f 0b e9 61 f8 ff ff e8 7f 6a c8 f7 <0f> 0b e9 85 fb ff ff e8 73 6a c8 f7 48 c7 c7 40 13 fd 8e 4c 89 e6
RSP: 0018:ffffc900001e0a48 EFLAGS: 00010246
RAX: ffffffff89b9fe21 RBX: dffffc0000000000 RCX: ffff88802e1d9e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802e1d9e00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880565a2208
R13: ffff888056214824 R14: ffff8880565a2740 R15: ffff888056214800
FS: 00007fc81fb7e6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe70 CR3: 000000007ea84000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5509
ieee80211_beacon_get include/net/mac80211.h:5338 [inline]
mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2097
__iterate_interfaces+0x225/0x4c0 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:2153
__run_hrtimer kernel/time/hrtimer.c:1751 [inline]
__hrtimer_run_queues+0x522/0xc90 kernel/time/hrtimer.c:1815
hrtimer_run_softirq+0x173/0x290 kernel/time/hrtimer.c:1832
handle_softirqs+0x291/0x910 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 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:stack_trace_consume_entry+0x1/0x270 kernel/stacktrace.c:83
Code: 00 42 c7 44 33 08 00 00 00 00 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 78 75 09 48 8d 65 f0 5b 41 5e 5d c3 e8 21 52 c6 08 90 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc900034365f8 EFLAGS: 00000286
RAX: ffffffff81ad6a4b RBX: ffffc900034366c0 RCX: 0000000080000000
RDX: ffffc90003436601 RSI: ffffffff81ad6a4b RDI: ffffc900034366c0
RBP: ffffc90003436690 R08: ffffc90003437230 R09: ffffc90003436658
R10: dffffc0000000000 R11: fffff52000686ccd R12: ffff88802e1d9e00
R13: 1ffff11005c3b46e R14: ffffffff817105e0 R15: ffffc90003436608
arch_stack_walk+0x100/0x140 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 mm/page_owner.c:127
__set_page_owner+0x19/0x60 mm/page_owner.c:190
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
prep_new_page mm/page_alloc.c:2567 [inline]
get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
__alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
__folio_alloc+0xe/0x30 mm/page_alloc.c:5690
vma_alloc_folio+0x499/0x900 mm/mempolicy.c:2245
shmem_alloc_folio mm/shmem.c:1598 [inline]
shmem_alloc_and_acct_folio+0x463/0xbd0 mm/shmem.c:1622
shmem_get_folio_gfp+0x1439/0x35e0 mm/shmem.c:1950
shmem_get_folio mm/shmem.c:2081 [inline]
shmem_write_begin+0xee/0x3f0 mm/shmem.c:2565
generic_perform_write+0x2fa/0x5c0 mm/filemap.c:3862
__generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989
__kernel_write_iter+0x298/0x690 fs/read_write.c:517
dump_emit_page fs/coredump.c:950 [inline]
dump_user_range+0x374/0x7b0 fs/coredump.c:977
elf_core_dump+0x30ca/0x3630 fs/binfmt_elf.c:2354
do_coredump+0x1702/0x25c0 fs/coredump.c:824
get_signal+0x1093/0x1340 kernel/signal.c:2870
arch_do_signal_or_restart+0xc4/0x1310 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:319
exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1485
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fc81ed9fb21
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: 00007fc81f026090 RCX: 00007fc81ed9fb19
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fc81ee37b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fc81f026128 R14: 00007fc81f026090 R15: 00007fff3fef0158
----------------
Code disassembly (best guess):
0: 00 42 c7 add %al,-0x39(%rdx)
3: 44 33 08 xor (%rax),%r9d
6: 00 00 add %al,(%rax)
8: 00 00 add %al,(%rax)
a: 65 48 8b 0c 25 28 00 mov %gs:0x28,%rcx
11: 00 00
13: 48 3b 4c 24 78 cmp 0x78(%rsp),%rcx
18: 75 09 jne 0x23
1a: 48 8d 65 f0 lea -0x10(%rbp),%rsp
1e: 5b pop %rbx
1f: 41 5e pop %r14
21: 5d pop %rbp
22: c3 ret
23: e8 21 52 c6 08 call 0x8c65249
28: 90 nop
29: 55 push %rbp
* 2a: 41 57 push %r15 <-- trapping instruction
2c: 41 56 push %r14
2e: 41 55 push %r13
30: 41 54 push %r12
32: 53 push %rbx
33: 48 83 ec 18 sub $0x18,%rsp
37: 48 rex.W
38: ba 00 00 00 00 mov $0x0,%edx
3d: 00 fc add %bh,%ah
3f: ff .byte 0xff