------------[ cut here ]------------
WARNING: CPU: 0 PID: 9550 at net/mac80211/tx.c:5033 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
WARNING: CPU: 0 PID: 9550 at net/mac80211/tx.c:5033 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5444
Modules linked in:
CPU: 0 PID: 9550 Comm: syz.1.651 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5033 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5444
Code: 24 4c 89 e7 e8 ae a6 be f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 b9 db 80 f7 0f 0b e9 f6 f7 ff ff e8 ad db 80 f7 <0f> 0b e9 48 fb ff ff e8 a1 db 80 f7 48 c7 c7 a0 d0 64 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a064fe3 RBX: ffffffff8a063de6 RCX: ffff88805ea88000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88805ea88000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888064aba440
R13: dffffc0000000000 R14: ffff888064aba930 R15: ffff88805cdf6824
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3b3f24 CR3: 000000000cf32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5571
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:1754 [inline]
__hrtimer_run_queues+0x520/0xc40 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1835
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:debug_check_no_obj_freed+0x5/0x540 lib/debugobjects.c:1019
Code: ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c e4 fd ff ff 48 89 d7 48 89 d3 e8 58 bd ad fd 48 89 da e9 d1 fd ff ff 66 0f 1f 00 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 58 80 3d 2f ec 59 0a 00 0f 85
RSP: 0018:ffffc9001006f160 EFLAGS: 00000246
RAX: 064fb806ce9f5000 RBX: ffffea00014b25c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000001000 RDI: ffff888052c97000
RBP: 0000000000000000 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: ffff888052c97000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000000
free_pages_prepare mm/page_alloc.c:1187 [inline]
free_unref_page_prepare+0x1da/0x8c0 mm/page_alloc.c:2365
free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
release_pages+0x1f7a/0x2200 mm/swap.c:1022
__folio_batch_release+0x71/0xe0 mm/swap.c:1042
folio_batch_release include/linux/pagevec.h:83 [inline]
shmem_undo_range+0x630/0x1b20 mm/shmem.c:1026
shmem_truncate_range mm/shmem.c:1135 [inline]
shmem_evict_inode+0x245/0x9e0 mm/shmem.c:1264
evict+0x4ca/0x8d0 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfe/0x1e0 fs/dcache.c:918
__fput+0x5e5/0x970 fs/file_table.c:392
task_work_run+0x1d4/0x260 kernel/task_work.c:245
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x95a/0x2460 kernel/exit.c:884
do_group_exit+0x21b/0x2d0 kernel/exit.c:1026
get_signal+0x12fc/0x13f0 kernel/signal.c:2902
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
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9ea099ce59
Code: Unable to access opcode bytes at 0x7f9ea099ce2f.
RSP: 002b:00007f9ea1872028 EFLAGS: 00000246
ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f9ea0c16090 RCX: 00007f9ea099ce59
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f9ea0a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9ea0c16128 R14: 00007f9ea0c16090 R15: 00007ffe6af82288
----------------
Code disassembly (best guess), 1 bytes skipped:
0: ff 89 d1 80 e1 07 decl 0x7e180d1(%rcx)
6: 80 c1 03 add $0x3,%cl
9: 38 c1 cmp %al,%cl
b: 0f 8c e4 fd ff ff jl 0xfffffdf5
11: 48 89 d7 mov %rdx,%rdi
14: 48 89 d3 mov %rdx,%rbx
17: e8 58 bd ad fd call 0xfdadbd74
1c: 48 89 da mov %rbx,%rdx
1f: e9 d1 fd ff ff jmp 0xfffffdf5
24: 66 0f 1f 00 nopw (%rax)
28: 55 push %rbp
* 29: 41 57 push %r15 <-- trapping instruction
2b: 41 56 push %r14
2d: 41 55 push %r13
2f: 41 54 push %r12
31: 53 push %rbx
32: 48 83 ec 58 sub $0x58,%rsp
36: 80 3d 2f ec 59 0a 00 cmpb $0x0,0xa59ec2f(%rip) # 0xa59ec6c
3d: 0f .byte 0xf
3e: 85 .byte 0x85