------------[ cut here ]------------
WARNING: CPU: 0 PID: 4701 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 0 PID: 4701 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Modules linked in:
CPU: 0 PID: 4701 Comm: syz.1.93 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:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5345
Code: 24 4c 89 e7 e8 8e 2e 0a f8 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 a9 8f d1 f7 0f 0b e9 f6 f7 ff ff e8 9d 8f d1 f7 <0f> 0b e9 48 fb ff ff e8 91 8f d1 f7 48 c7 c7 90 dc fa 8d 4c 89 e6
RSP: 0018:ffffc90000007a30 EFLAGS: 00010246
RAX: ffffffff89b0e4f3 RBX: ffffffff89b0d2f6 RCX: ffff88802726d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802726d940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888075e32228
R13: dffffc0000000000 R14: ffff888075e32760 R15: ffff888055508824
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2c9c17dac CR3: 000000000c88e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5472
ieee80211_beacon_get include/net/mac80211.h:5335 [inline]
mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091
__iterate_interfaces+0x243/0x500 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:2147
__run_hrtimer kernel/time/hrtimer.c:1747 [inline]
__hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
handle_softirqs+0x2a1/0x930 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 00 00 00 66 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 be e0 2c f7 48 89 df e8 06 a9 2d f7 e8 11 ff 50 f7 fb bf 01 00 00 00 56 0d 21 f7 65 8b 05 a7 90 ca 75 85 c0 74 02 5b c3 e8 f4 a4 c8
RSP: 0018:ffffc90005f3f298 EFLAGS: 00000282
RAX: ebf31b86dfd7f400 RBX: ffff88802f83dbd0 RCX: ebf31b86dfd7f400
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: 0000000000000001
RBP: ffffc90005f3f550 R08: ffffffff90af724f R09: 1ffffffff215ee49
R10: dffffc0000000000 R11: fffffbfff215ee4a R12: dffffc0000000000
R13: 1ffff11005f07b79 R14: ffff88802f83dbc8 R15: ffff88802f83dbd0
spin_unlock_irq include/linux/spinlock.h:401 [inline]
filemap_remove_folio+0xf5/0x2c0 mm/filemap.c:256
truncate_inode_folio+0x59/0x70 mm/truncate.c:195
shmem_undo_range+0x533/0x20c0 mm/shmem.c:942
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
evict+0x4c9/0x8d0 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfa/0x1d0 fs/dcache.c:918
__fput+0x5e0/0x920 fs/file_table.c:328
task_work_run+0x1d0/0x260 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x982/0x2480 kernel/exit.c:880
do_group_exit+0x217/0x2d0 kernel/exit.c:1022
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
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:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f618539c819
Code: Unable to access opcode bytes at 0x7f618539c7ef.
RSP: 002b:00007f61862400e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6185616098 RCX: 00007f618539c819
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6185616098
RBP: 00007f6185616090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6185616128 R14: 00007ffe779e97f0 R15: 00007ffe779e98d8
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 66 90 add %ah,-0x70(%rsi)
5: 53 push %rbx
6: 48 89 fb mov %rdi,%rbx
9: 48 83 c7 18 add $0x18,%rdi
d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
12: e8 be e0 2c f7 call 0xf72ce0d5
17: 48 89 df mov %rbx,%rdi
1a: e8 06 a9 2d f7 call 0xf72da925
1f: e8 11 ff 50 f7 call 0xf750ff35
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 56 0d 21 f7 call 0xf7210d85 <-- trapping instruction
2f: 65 8b 05 a7 90 ca 75 mov %gs:0x75ca90a7(%rip),%eax # 0x75ca90dd
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: f4 hlt
3e: a4 movsb %ds:(%rsi),%es:(%rdi)
3f: c8 .byte 0xc8