------------[ cut here ]------------
WARNING: CPU: 0 PID: 15570 at net/mac80211/tx.c:5135 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5135 [inline]
WARNING: CPU: 0 PID: 15570 at net/mac80211/tx.c:5135 __ieee80211_beacon_get+0x1135/0x1520 net/mac80211/tx.c:5578
Modules linked in:
CPU: 0 PID: 15570 Comm: syz.8.2401 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5135 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1135/0x1520 net/mac80211/tx.c:5578
Code: d4 e8 7f aa 72 f7 eb 05 e8 78 aa 72 f7 4c 89 ef e8 90 08 b1 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 5b aa 72 f7 <0f> 0b e9 61 f8 ff ff e8 4f aa 72 f7 0f 0b e9 85 fb ff ff e8 43 aa
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff8a153445 RBX: dffffc0000000000 RCX: ffff8880259b5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880259b5a00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805025e420
R13: ffff888030257c24 R14: ffff88805025e910 R15: ffff888030257c00
FS: 0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3ea5e9 CR3: 000000000df32000 CR4: 00000000003506f0
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5673
ieee80211_beacon_get include/net/mac80211.h:5447 [inline]
mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2271
__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:2301
__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:lock_release+0x594/0x8c0 kernel/locking/lockdep.c:5814
Code: 00 00 00 f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 2f 04 f8 75 70 f7 44 24 50 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900039bf0c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: 58fb2d61a0839900
RDX: 0000000000000000 RSI: ffffffff8aeae2c0 RDI: ffffffff8b3c5260
RBP: ffffc900039bf1e0 R08: ffffffff8f8dda6f R09: 1ffffffff1f1bb4d
R10: dffffc0000000000 R11: fffffbfff1f1bb4e R12: ffff8880259b64e8
R13: dffffc0000000000 R14: ffff8880259b64d8 R15: 1ffff92000737e24
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1182 [inline]
free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2505
release_pages+0x208a/0x2300 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+0x5ff/0x1a80 mm/shmem.c:1026
shmem_truncate_range mm/shmem.c:1135 [inline]
shmem_evict_inode+0x285/0xa70 mm/shmem.c:1264
evict+0x4b3/0x9d0 fs/inode.c:702
__dentry_kill+0x412/0x630 fs/dcache.c:613
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfe/0x1e0 fs/dcache.c:920
__fput+0x5b2/0x940 fs/file_table.c:426
task_work_run+0x1d4/0x260 kernel/task_work.c:245
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x986/0x2530 kernel/exit.c:890
do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
get_signal+0x12a6/0x1390 kernel/signal.c:2927
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
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+0x9/0x30 kernel/entry/common.c:318
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: 0033:0x7f4d3e79fb21
Code: Unable to access opcode bytes at 0x7f4d3e79faf7.
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f4d3ea26090 RCX: 00007f4d3e79fb19
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f4d3e837b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f4d3ea26128 R14: 00007f4d3ea26090 R15: 00007ffc19228b98
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 f7 add %dh,%bh
4: 84 24 80 test %ah,(%rax,%rax,4)
7: 00 00 add %al,(%rax)
9: 00 00 add %al,(%rax)
b: 02 00 add (%rax),%al
d: 00 43 c6 add %al,-0x3a(%rbx)
10: 44 2f rex.R (bad)
12: 04 f8 add $0xf8,%al
14: 75 70 jne 0x86
16: f7 44 24 50 00 02 00 testl $0x200,0x50(%rsp)
1d: 00
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp)
28: e0 45
* 2a: 4b c7 04 2f 00 00 00 movq $0x0,(%r15,%r13,1) <-- trapping instruction
31: 00
32: 43 c7 44 2f 08 00 00 movl $0x0,0x8(%r15,%r13,1)
39: 00 00
3b: 65 gs
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 04 25 add $0x25,%al