bug in kernel (net/wireless/sme.c:752)

[ceco]

$ uname -r
4.19.50-v7+
$ uname -m
armv7l
$ cat /etc/debian_version
10.0

After upgrading to Buster and running for a few days - the following shows up within the dmesg:

[329783.277081] brcmfmac: brcmf_update_bss_info: wl dtim_assoc failed (-52)
[329783.277189] ------------[ cut here ]------------
[329783.277450] WARNING: CPU: 3 PID: 17478 at net/wireless/sme.c:752 __cfg80211_connect_result+0x3c0/0x410 [cfg80211]
[329783.277457] Modules linked in: binfmt_misc ipt_MASQUERADE nf_conntrack_netlink nft_counter nft_chain_nat_ipv4 nf_nat_ipv4 xt_addrtype nft_compat nf_tables nfnetlink xt_conntrack nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge overlay bnep hci_uart btbcm serdev bluetooth ecdh_generic 8021q garp stp llc brcmfmac brcmutil sha256_generic cfg80211 rfkill raspberrypi_hwmon hwmon bcm2835_codec(C) bcm2835_v4l2(C) v4l2_mem2mem snd_bcm2835(C) bcm2835_mmal_vchiq(C) snd_pcm v4l2_common videobuf2_dma_contig videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_timer videobuf2_common snd videodev media uio_pdrv_genirq uio fixed i2c_dev ip_tables x_tables ipv6
[329783.277763] CPU: 3 PID: 17478 Comm: kworker/u8:2 Tainted: G C 4.19.50-v7+ #896
[329783.277768] Hardware name: BCM2835
[329783.277972] Workqueue: cfg80211 cfg80211_event_work [cfg80211]
[329783.278007] [<80111f2c>] (unwind_backtrace) from [<8010d4b0>] (show_stack+0x20/0x24)
[329783.278025] [<8010d4b0>] (show_stack) from [<80817ce0>] (dump_stack+0xd4/0x118)
[329783.278044] [<80817ce0>] (dump_stack) from [<801209c8>] (__warn+0x104/0x11c)
[329783.278060] [<801209c8>] (__warn) from [<80120b18>] (warn_slowpath_null+0x50/0x58)
[329783.278266] [<80120b18>] (warn_slowpath_null) from [<7f333674>] (__cfg80211_connect_result+0x3c0/0x410 [cfg80211])
[329783.278673] [<7f333674>] (__cfg80211_connect_result [cfg80211]) from [<7f30331c>] (cfg80211_process_wdev_events+0x104/0x160 [cfg80211])
[329783.279060] [<7f30331c>] (cfg80211_process_wdev_events [cfg80211]) from [<7f3033b8>] (cfg80211_process_rdev_events+0x40/0x98 [cfg80211])
[329783.279445] [<7f3033b8>] (cfg80211_process_rdev_events [cfg80211]) from [<7f2fd2d4>] (cfg80211_event_work+0x24/0x2c [cfg80211])
[329783.279647] [<7f2fd2d4>] (cfg80211_event_work [cfg80211]) from [<8013beb4>] (process_one_work+0x170/0x458)
[329783.279664] [<8013beb4>] (process_one_work) from [<8013c1f8>] (worker_thread+0x5c/0x5a4)
[329783.279680] [<8013c1f8>] (worker_thread) from [<801424e4>] (kthread+0x138/0x168)
[329783.279698] [<801424e4>] (kthread) from [<801010ac>] (ret_from_fork+0x14/0x28)
[329783.279705] Exception stack(0xa9f9dfb0 to 0xa9f9dff8)
[329783.279715] dfa0: 00000000 00000000 00000000 00000000
[329783.279726] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[329783.279736] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[329783.279745] ---[ end trace e8852331fe781a2b ]---

This is not fresh install. This is upgrade from Raspbian Stretch -> Raspbian Buster.