Hi all, I can confirm that this problem also occurs for me at an older 802.11ac upgraded iMac6,1 and iMac8,1 computer. This is the case for kernel 6.11.0-17 as well as kernel 6.8.0-54. The used WiFi card is an Apple Broadcom BCM94360CSAX.
This problem is present since the upgrade to Kubuntu 24.04 LTS. On Kubuntu 22.04 LTS and older 5.x based kernels the WiFi card worked mostly without any problems. However, it looks that this doesn't occur on every 802.11ac upgraded iMac. At least for an iMac5,1 computer the BCM94360CSAX card seems to work fine under Lubuntu 24.04 LTS and newer 6.8 and 6.11 kernels. [ 110.352437] ------------[ cut here ]------------ [ 110.352447] UBSAN: array-index-out-of-bounds in /var/lib/dkms/broadcom-sta/6.30.223.271/build/src/wl/sys/wl_linux.c:1935:4 [ 110.352455] index 2 is out of range for type 'ether_addr [1]' [ 110.352461] CPU: 0 UID: 0 PID: 35 Comm: kworker/u8:2 Tainted: P W OE 6.11.0-17-generic #17~24.04.2-Ubuntu [ 110.352467] Tainted: [P]=PROPRIETARY_MODULE, [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE [ 110.352470] Hardware name: Apple Computer, Inc. iMac6,1/Mac-F4218FC8, BIOS IM61.88Z.0093.B07.0706281250 06/28/07 [ 110.352472] Workqueue: ipv6_addrconf addrconf_dad_work [ 110.352483] Call Trace: [ 110.352486] <TASK> [ 110.352491] dump_stack_lvl+0x76/0xa0 [ 110.352502] dump_stack+0x10/0x20 [ 110.352506] __ubsan_handle_out_of_bounds+0xcb/0x110 [ 110.352512] _wl_set_multicast_list+0x126/0x230 [wl] [ 110.352647] wl_set_multicast_list+0x3a/0xa0 [wl] [ 110.352739] __dev_set_rx_mode+0x79/0xe0 [ 110.352745] __dev_mc_add+0x94/0xa0 [ 110.352750] dev_mc_add+0x10/0x20 [ 110.352755] igmp6_group_added+0xe0/0x100 [ 110.352762] __ipv6_dev_mc_inc+0x27d/0x400 [ 110.352767] ipv6_dev_mc_inc+0x10/0x20 [ 110.352772] addrconf_dad_work+0xaa/0x500 [ 110.352777] process_one_work+0x17b/0x3d0 [ 110.352785] worker_thread+0x2de/0x410 [ 110.352788] ? __pfx_worker_thread+0x10/0x10 [ 110.352792] kthread+0xe4/0x110 [ 110.352796] ? __pfx_kthread+0x10/0x10 [ 110.352800] ret_from_fork+0x47/0x70 [ 110.352805] ? __pfx_kthread+0x10/0x10 [ 110.352808] ret_from_fork_asm+0x1a/0x30 [ 110.352816] </TASK> [ 110.352818] ---[ end trace ]--- -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to broadcom-sta in Ubuntu. https://bugs.launchpad.net/bugs/2065839 Title: UBSAN: array-index-out-of-bounds Status in broadcom-sta package in Ubuntu: Confirmed Bug description: [ 43.991642] ------------[ cut here ]------------ [ 43.991650] UBSAN: array-index-out-of-bounds in /var/lib/dkms/broadcom-sta/6.30.223.271/build/src/wl/sys/wl_cfg80211_hybrid.c:2394:26 [ 43.991659] index 1 is out of range for type 'uint8 [1]' [ 43.991663] CPU: 1 PID: 763 Comm: wl_event_handle Tainted: P OE 6.8.0-31-generic #31-Ubuntu [ 43.991668] Hardware name: Apple Inc. MacBookAir4,2/Mac-742912EFDBEE19B3, BIOS 135.0.0.0.0 06/14/2019 [ 43.991670] Call Trace: [ 43.991674] <TASK> [ 43.991678] dump_stack_lvl+0x48/0x70 [ 43.991692] dump_stack+0x10/0x20 [ 43.991697] __ubsan_handle_out_of_bounds+0xc6/0x110 [ 43.991703] wl_update_bss_info+0x10f/0x370 [wl] [ 43.991807] wl_bss_connect_done.isra.0+0x170/0x2a0 [wl] [ 43.991901] wl_notify_connect_status+0xdf/0x450 [wl] [ 43.991998] wl_event_handler+0x7b/0x240 [wl] [ 43.992077] ? __pfx_wl_event_handler+0x10/0x10 [wl] [ 43.992147] kthread+0xf2/0x120 [ 43.992151] ? __pfx_kthread+0x10/0x10 [ 43.992154] ret_from_fork+0x47/0x70 [ 43.992158] ? __pfx_kthread+0x10/0x10 [ 43.992160] ret_from_fork_asm+0x1b/0x30 [ 43.992165] </TASK> [ 43.992166] ---[ end trace ]--- ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-31-generic 6.8.0-31.31 ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1 Uname: Linux 6.8.0-31-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.28.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: js1 1135 F.... pipewire /dev/snd/controlC0: js1 1137 F.... wireplumber CRDA: N/A CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Wed May 15 22:42:50 2024 InstallationDate: Installed on 2024-03-01 (75 days ago) InstallationMedia: Kubuntu 23.10 "Mantic Minotaur" - Release amd64 (20231010) MachineType: Apple Inc. MacBookAir4,2 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-31-generic root=/dev/mapper/vgkubuntu-root ro ipv6.disable=1 quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-6.8.0-31-generic N/A linux-backports-modules-6.8.0-31-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/14/2019 dmi.bios.release: 0.1 dmi.bios.vendor: Apple Inc. dmi.bios.version: 135.0.0.0.0 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-742912EFDBEE19B3 dmi.board.vendor: Apple Inc. dmi.board.version: MacBookAir4,2 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-742912EFDBEE19B3 dmi.modalias: dmi:bvnAppleInc.:bvr135.0.0.0.0:bd06/14/2019:br0.1:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3:skuSystemSKU#: dmi.product.family: MacBook Air dmi.product.name: MacBookAir4,2 dmi.product.sku: System SKU# dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. 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