------------[ cut here ]------------
WARNING: CPU: 1 PID: 5928 at net/mac80211/tx.c:5048 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5048 [inline]
WARNING: CPU: 1 PID: 5928 at net/mac80211/tx.c:5048 __ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5459
Modules linked in:
CPU: 1 PID: 5928 Comm: syz.1.26 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5048 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1141/0x1520 net/mac80211/tx.c:5459
Code: f7 4c 89 ef e8 50 38 b8 f7 45 31 ed 4c 8b bc 24 a0 00 00 00 e9 7f fe ff ff e8 1b 4c 7a f7 0f 0b e9 61 f8 ff ff e8 0f 4c 7a f7 <0f> 0b e9 85 fb ff ff e8 03 4c 7a f7 48 c7 c7 60 b8 65 8e 4c 89 e6
RSP: 0018:ffffc900001f0a18 EFLAGS: 00010246
RAX: ffffffff8a0d2611 RBX: dffffc0000000000 RCX: ffff88802d0abc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802d0abc00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88805d0c6440
R13: ffff888028c26024 R14: ffff88805d0c6930 R15: ffff888028c26000
FS: 00007f8181e066c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8180f87240 CR3: 0000000031134000 CR4: 00000000003506e0
Call Trace:
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5586
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__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:2295
__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:finish_task_switch+0x267/0x8f0 kernel/sched/core.c:5256
Code: 31 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 e9 d5 04 00 00 4c 89 e7 e8 23 f7 3a 09 e8 be 19 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 00 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc90004926a40 EFLAGS: 00000286
RAX: 4a6b40a98781ef00 RBX: 0000000000000000 RCX: 4a6b40a98781ef00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d32e0
RBP: ffffc90004926a90 R08: ffffffff911ed5af R09: 1ffffffff223dab5
R10: dffffc0000000000 R11: fffffbfff223dab6 R12: ffff88802d0abc00
R13: ffff8880b8f3cfc8 R14: dffffc0000000000 R15: ffff8880b8f3cd48
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6701
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:__rcu_read_lock+0x2f/0x60 kernel/rcu/tree_plugin.h:404
Code: 65 48 8b 1d 53 b5 91 7e 48 81 c3 3c 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 11 ff 03 <8b> 03 3d 00 00 00 40 7d 02 5b c3 0f 0b eb fa 89 d9 80 e1 07 80 c1
RSP: 0018:ffffc90004926e30 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802d0ac03c RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8acadd60 RDI: ffff88802ecb0010
RBP: 1ffff11005a36e0a R08: dffffc0000000000 R09: 1ffffffff223daa0
R10: dffffc0000000000 R11: fffffbfff223daa1 R12: ffff88802ecb0054
R13: dffffc0000000000 R14: ffff88802ecb0010 R15: ffff88802ecb0000
rcu_read_lock include/linux/rcupdate.h:784 [inline]
percpu_ref_tryget_many include/linux/percpu-refcount.h:241 [inline]
percpu_ref_tryget+0xe/0x180 include/linux/percpu-refcount.h:266
css_tryget include/linux/cgroup_refcnt.h:45 [inline]
get_mem_cgroup_from_mm+0x102/0x290 mm/memcontrol.c:1094
__mem_cgroup_charge+0x15/0x80 mm/memcontrol.c:7110
mem_cgroup_charge include/linux/memcontrol.h:686 [inline]
shmem_add_to_page_cache+0x8d3/0x1b80 mm/shmem.c:784
shmem_get_folio_gfp+0x1037/0x2b40 mm/shmem.c:2071
shmem_get_folio mm/shmem.c:2164 [inline]
shmem_write_begin+0xf2/0x430 mm/shmem.c:2706
generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036
shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
__kernel_write_iter+0x29f/0x6d0 fs/read_write.c:517
dump_emit_page fs/coredump.c:958 [inline]
dump_user_range+0x418/0x840 fs/coredump.c:985
elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
do_coredump+0x1791/0x24a0 fs/coredump.c:834
get_signal+0x10da/0x1390 kernel/signal.c:2897
arch_do_signal_or_restart+0xc2/0x7b0 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: 0033:0x7f8180f9e0e1
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: 00007f8181226090 RCX: 00007f8180f9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f8181035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f8181226128 R14: 00007f8181226090 R15: 00007ffc347857f8
----------------
Code disassembly (best guess):
0: 31 09 xor %ecx,(%rcx)
2: 85 c0 test %eax,%eax
4: 0f 84 30 01 00 00 je 0x13a
a: 48 85 db test %rbx,%rbx
d: 0f 85 4f 01 00 00 jne 0x162
13: e9 d5 04 00 00 jmp 0x4ed
18: 4c 89 e7 mov %r12,%rdi
1b: e8 23 f7 3a 09 call 0x93af743
20: e8 be 19 30 00 call 0x3019e3
25: fb sti
26: 4c 8b 65 b8 mov -0x48(%rbp),%r12
* 2a: 49 8d bc 24 00 16 00 lea 0x1600(%r12),%rdi <-- trapping instruction
31: 00
32: 48 89 f8 mov %rdi,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax
3e: 84 c0 test %al,%al