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BUG: KASAN: use-after-free in ieee80211_scan_rx+0x4d0/0x510 net/mac80211/scan.c:278
Read of size 4 at addr ffff000019bd9a2c by task ksoftirqd/0/11

CPU: 0 PID: 11 Comm: ksoftirqd/0 Not tainted 5.11.0-rc7-syzkaller-00090-gdcc0b49040c7 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x0/0x3e0 arch/arm64/include/asm/pointer_auth.h:76
 show_stack+0x18/0x70 arch/arm64/kernel/stacktrace.c:196
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x110/0x188 lib/dump_stack.c:120
 print_address_description.constprop.0+0x2c/0x300 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report+0x1e8/0x200 mm/kasan/report.c:413
 __asan_report_load4_noabort+0x34/0x60 mm/kasan/report_generic.c:308
 ieee80211_scan_rx+0x4d0/0x510 net/mac80211/scan.c:278
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4558 [inline]
 ieee80211_rx_list+0x133c/0x1930 net/mac80211/rx.c:4746
 ieee80211_rx_napi+0xe4/0x2e4 net/mac80211/rx.c:4769
 ieee80211_rx include/net/mac80211.h:4508 [inline]
 ieee80211_tasklet_handler+0x10c/0x120 net/mac80211/main.c:235
 tasklet_action_common.constprop.0+0x230/0x340 kernel/softirq.c:555
 tasklet_action+0x60/0x94 kernel/softirq.c:575
 _stext+0x400/0x10cc
 run_ksoftirqd kernel/softirq.c:650 [inline]
 run_ksoftirqd+0xa4/0xec kernel/softirq.c:642
 smpboot_thread_fn+0x46c/0x7f4 kernel/smpboot.c:165
 kthread+0x320/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x10/0x3c arch/arm64/kernel/entry.S:958

Allocated by task 14913:
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:121
 kasan_save_stack+0x28/0x5c mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x8c/0xb4 mm/kasan/common.c:429
 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:443
 kasan_kmalloc include/linux/kasan.h:219 [inline]
 __kmalloc+0x264/0x4b0 mm/slub.c:3985
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:682 [inline]
 cfg80211_conn_scan+0x11c/0x1074 net/wireless/sme.c:81
 cfg80211_sme_connect net/wireless/sme.c:586 [inline]
 cfg80211_connect+0x104c/0x1bf0 net/wireless/sme.c:1258
 nl80211_connect+0xf6c/0x1740 net/wireless/nl80211.c:10759
 genl_family_rcv_msg_doit+0x1b8/0x2a0 net/netlink/genetlink.c:739
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0x24c/0x430 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x198/0x34c net/netlink/af_netlink.c:2494
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x3e0/0x670 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x610/0xa20 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xc0/0xf4 net/socket.c:672
 ____sys_sendmsg+0x548/0x6d0 net/socket.c:2345
 ___sys_sendmsg+0xf4/0x170 net/socket.c:2399
 __sys_sendmsg+0xbc/0x14c net/socket.c:2432
 __compat_sys_sendmsg net/compat.c:347 [inline]
 __do_compat_sys_sendmsg net/compat.c:354 [inline]
 __se_compat_sys_sendmsg net/compat.c:351 [inline]
 __arm64_compat_sys_sendmsg+0x74/0xac net/compat.c:351
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:49 [inline]
 el0_svc_common.constprop.0+0x110/0x3c0 arch/arm64/kernel/syscall.c:159
 do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:204
 el0_svc_compat+0x20/0x30 arch/arm64/kernel/entry-common.c:442
 el0_sync_compat_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:451
 el0_sync_compat+0x178/0x180 arch/arm64/kernel/entry.S:708

Freed by task 14244:
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:121
 kasan_save_stack+0x28/0x5c mm/kasan/common.c:38
 kasan_set_track+0x28/0x40 mm/kasan/common.c:46
 kasan_set_free_info+0x28/0x50 mm/kasan/generic.c:356
 ____kasan_slab_free+0xf0/0x154 mm/kasan/common.c:362
 __kasan_slab_free+0x14/0x20 mm/kasan/common.c:369
 kasan_slab_free include/linux/kasan.h:192 [inline]
 slab_free_hook mm/slub.c:1547 [inline]
 slab_free_freelist_hook+0x8c/0x240 mm/slub.c:1580
 slab_free mm/slub.c:3143 [inline]
 kfree+0x154/0x5fc mm/slub.c:4139
 ___cfg80211_scan_done+0x330/0x81c net/wireless/scan.c:974
 __cfg80211_scan_done+0x24/0x40 net/wireless/scan.c:991
 process_one_work+0x79c/0x1880 kernel/workqueue.c:2275
 worker_thread+0x3d4/0xcd0 kernel/workqueue.c:2421
 kthread+0x320/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x10/0x3c arch/arm64/kernel/entry.S:958

The buggy address belongs to the object at ffff000019bd9a00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 44 bytes inside of
 256-byte region [ffff000019bd9a00, ffff000019bd9b00)
The buggy address belongs to the page:
page:00000000c2f338f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x59bd8
head:00000000c2f338f2 order:1 compound_mapcount:0
flags: 0x1ffc00000010200(slab|head)
raw: 01ffc00000010200 dead000000000100 dead000000000122 ffff00000cc03b00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000019bd9900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff000019bd9980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff000019bd9a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff000019bd9a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff000019bd9b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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