------------[ cut here ]------------ WARNING: CPU: 0 PID: 12 at net/wireless/scan.c:2337 cpu_max_bits_warn include/linux/cpumask.h:137 [inline] WARNING: CPU: 0 PID: 12 at net/wireless/scan.c:2337 cpumask_check include/linux/cpumask.h:144 [inline] WARNING: CPU: 0 PID: 12 at net/wireless/scan.c:2337 cpumask_test_cpu include/linux/cpumask.h:373 [inline] WARNING: CPU: 0 PID: 12 at net/wireless/scan.c:2337 trace_cfg80211_inform_bss_frame net/wireless/trace.h:3262 [inline] WARNING: CPU: 0 PID: 12 at net/wireless/scan.c:2337 cfg80211_inform_single_bss_frame_data+0xa21/0xc70 net/wireless/scan.c:2317 Modules linked in: CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cfg80211_inform_single_bss_frame_data+0xa21/0xc70 net/wireless/scan.c:2337 Code: 24 0c 4c 89 ee 4c 89 e7 e8 1c ea fe ff e9 7f fc ff ff 0f 0b 45 31 e4 e9 81 fc ff ff 0f 0b e9 7a fc ff ff 0f 0b e9 8b f6 ff ff <0f> 0b 45 31 e4 e9 69 fc ff ff 0f 0b e9 4d fe ff ff e8 e9 22 cc f9 RSP: 0018:ffffc90000d174d8 EFLAGS: 00010246 RAX: 0000000000000080 RBX: ffffc90000d17a48 RCX: 0000000000000001 RDX: 0000000000000080 RSI: ffffffff88aae2e0 RDI: ffff88803e11065c RBP: 1ffff920001a2ea3 R08: 0000000000000000 R09: ffffffff8c56fa0f R10: fffffbfff18adf41 R11: 0000000000000001 R12: ffff88803e110580 R13: 0000000000000023 R14: ffff88803b962c00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f218a315ff8 CR3: 000000003dc70000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfg80211_inform_bss_frame_data+0x94/0xa80 net/wireless/scan.c:2433 ieee80211_bss_info_update+0x29b/0x890 net/mac80211/scan.c:190 ieee80211_scan_rx+0x31e/0x5f0 net/mac80211/scan.c:299 __ieee80211_rx_handle_packet net/mac80211/rx.c:4627 [inline] ieee80211_rx_list+0x1957/0x2370 net/mac80211/rx.c:4819 ieee80211_rx_napi+0xc4/0x330 net/mac80211/rx.c:4842 ieee80211_rx include/net/mac80211.h:4524 [inline] ieee80211_tasklet_handler+0xe9/0x100 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x1d7/0x2d0 kernel/softirq.c:557 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345 run_ksoftirqd kernel/softirq.c:652 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:644 smpboot_thread_fn+0x561/0x8e0 kernel/smpboot.c:165 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294