------------[ cut here ]------------
WARNING: CPU: 0 PID: 6187 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 0 PID: 6187 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Modules linked in:
CPU: 0 PID: 6187 Comm: syz.2.378 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Code: ff ff ff e8 50 2c eb f7 0f 0b 48 8b 7c 24 20 e8 34 6c 7f fe e9 dd e9 ff ff e8 3a 2c eb f7 0f 0b e9 f1 ee ff ff e8 2e 2c eb f7 <0f> 0b e9 61 f2 ff ff e8 22 2c eb f7 48 c7 c7 f0 11 da 8d 4c 89 f6
RSP: 0018:ffffc900000078a0 EFLAGS: 00010246
RAX: ffffffff8995b3a2 RBX: 0000000000000000 RCX: ffff888027028000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007aa8 R08: ffff888027028000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff92000000f2c
R13: dffffc0000000000 R14: ffff888056efe258 R15: ffff88801ce7a600
FS: 00007f508facf6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f50889f6000 CR3: 000000007d463000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352
ieee80211_beacon_get include/net/mac80211.h:5264 [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+0x554/0xd60 kernel/time/hrtimer.c:1811
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 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:rcu_rdp_cpu_online kernel/rcu/tree.c:236 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x83/0x120 kernel/rcu/tree.c:776
Code: 3c 30 00 74 08 48 89 df e8 ea f0 65 00 48 8b 03 48 8d 98 80 b9 03 00 48 8d b8 a0 b9 03 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <74> 05 e8 c6 f0 65 00 4c 8b 7b 20 48 83 c3 18 48 89 d8 48 c1 e8 03
RSP: 0018:ffffc9000d0ef738 EFLAGS: 00000246
RAX: 1ffff110171c7734 RBX: ffff8880b8e3b980 RCX: 9d823d85207be600
RDX: 0000000000000000 RSI: ffffffff8abef900 RDI: ffff8880b8e3b9a0
RBP: 1ffff11005290ed0 R08: dffffc0000000000 R09: fffffbfff2119049
R10: fffffbfff2119049 R11: 1ffffffff2119048 R12: 0000000000000cc0
R13: dffffc0000000000 R14: dffffc0000000000 R15: dffffc0000000000
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309
task_css include/linux/cgroup.h:509 [inline]
mem_cgroup_from_task+0x96/0x110 mm/memcontrol.c:985
get_mem_cgroup_from_mm+0xd2/0x290 mm/memcontrol.c:1038
__mem_cgroup_charge+0x11/0x80 mm/memcontrol.c:6943
mem_cgroup_charge include/linux/memcontrol.h:672 [inline]
shmem_add_to_page_cache+0x8fc/0x1c00 mm/shmem.c:708
shmem_get_folio_gfp+0x158b/0x3400 mm/shmem.c:1971
shmem_get_folio mm/shmem.c:2072 [inline]
shmem_write_begin+0xee/0x3f0 mm/shmem.c:2556
generic_perform_write+0x2f7/0x5a0 mm/filemap.c:3862
__generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x44c/0x960 fs/read_write.c:584
ksys_write+0x143/0x240 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f508eb8e1ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f508facedf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000004000000 RCX: 00007f508eb8e1ff
RDX: 0000000004000000 RSI: 00007f50849f7000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000105c1
R10: 0000200000020c42 R11: 0000000000000293 R12: 0000000000000004
R13: 00007f508faceef0 R14: 00007f508faceeb0 R15: 00007f50849f7000
----------------
Code disassembly (best guess):
0: 3c 30 cmp $0x30,%al
2: 00 74 08 48 add %dh,0x48(%rax,%rcx,1)
6: 89 df mov %ebx,%edi
8: e8 ea f0 65 00 call 0x65f0f7
d: 48 8b 03 mov (%rbx),%rax
10: 48 8d 98 80 b9 03 00 lea 0x3b980(%rax),%rbx
17: 48 8d b8 a0 b9 03 00 lea 0x3b9a0(%rax),%rdi
1e: 48 89 f8 mov %rdi,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
* 2a: 74 05 je 0x31 <-- trapping instruction
2c: e8 c6 f0 65 00 call 0x65f0f7
31: 4c 8b 7b 20 mov 0x20(%rbx),%r15
35: 48 83 c3 18 add $0x18,%rbx
39: 48 89 d8 mov %rbx,%rax
3c: 48 c1 e8 03 shr $0x3,%rax