Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: broadcom-sta (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2030978
Title:
kernel 6.5 changes cause UBSAN errors (patch included)
Status in broadcom-sta package in Ubuntu:
Confirmed
Bug description:
"On Linux 6.5, due to commit 2d47c6956ab3 ("ubsan: Tighten UBSAN_BOUNDS
on GCC"), flexible trailing arrays declared like `whatever_t foo[1];`
will generate warnings when CONFIG_UBSAN & co. is enabled."
Due to changes in kernel 6.5, we get this error in dmesg:
[ 28.818756]
================================================================================
[ 28.822952] UBSAN: array-index-out-of-bounds in
/var/lib/dkms/broadcom-wl/6.30.223.271/build/src/wl/sys/wl_linux.c:1938:4
[ 28.828888] index 2 is out of range for type 'ether_addr [1]'
[ 28.832900] CPU: 1 PID: 1232 Comm: avahi-daemon Tainted: P OE
6.5.0-rc4 #1
[ 28.836452] Hardware name: Apple Inc. MacBookPro11,3/Mac-2BD1B31983FE1663,
BIOS 432.60.3.0.0 10/27/2021
[ 28.839806] Call Trace:
[ 28.843091] <TASK>
[ 28.846387] dump_stack_lvl+0x48/0x60
[ 28.849692] dump_stack+0x10/0x20
[ 28.852965] __ubsan_handle_out_of_bounds+0xc6/0x100
[ 28.856251] _wl_set_multicast_list+0x1fd/0x220 [wl]
[ 28.859191] wl_set_multicast_list+0x3a/0x80 [wl]
[ 28.861879] __dev_set_rx_mode+0x6a/0xc0
[ 28.864237] __dev_mc_add+0x82/0x90
[ 28.866587] dev_mc_add+0x10/0x20
[ 28.868920] igmp_group_added+0x198/0x1d0
[ 28.871102] ____ip_mc_inc_group+0x185/0x2b0
[ 28.873231] __ip_mc_join_group+0x108/0x170
[ 28.875170] ip_mc_join_group+0x10/0x20
[ 28.877111] do_ip_setsockopt+0x104d/0x1160
[ 28.878894] ? __sys_setsockopt+0xeb/0x1c0
[ 28.880657] ip_setsockopt+0x30/0xb0
[ 28.882326] udp_setsockopt+0x22/0x40
[ 28.883949] sock_common_setsockopt+0x14/0x20
[ 28.885554] __sys_setsockopt+0xde/0x1c0
[ 28.887063] __x64_sys_setsockopt+0x1f/0x30
[ 28.888564] do_syscall_64+0x55/0x80
[ 28.889952] ? syscall_exit_to_user_mode+0x26/0x40
[ 28.891226] ? __x64_sys_recvmsg+0x1d/0x20
[ 28.892450] ? do_syscall_64+0x61/0x80
[ 28.893651] ? do_syscall_64+0x61/0x80
[ 28.894796] entry_SYSCALL_64_after_hwframe+0x46/0xb0
[ 28.895942] RIP: 0033:0x7f0a97a7ddae
[ 28.897100] Code: 0f 1f 40 00 48 8b 15 69 60 0d 00 f7 d8 64 89 02 48 c7 c0
ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00
f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 31
[ 28.898270] RSP: 002b:00007fffb7b1b3f8 EFLAGS: 00000246 ORIG_RAX:
0000000000000036
[ 28.899449] RAX: ffffffffffffffda RBX: 000000000000000c RCX:
00007f0a97a7ddae
[ 28.900623] RDX: 0000000000000023 RSI: 0000000000000000 RDI:
000000000000000c
[ 28.901784] RBP: 0000000000000001 R08: 000000000000000c R09:
0000000000000004
[ 28.902895] R10: 00007fffb7b1b404 R11: 0000000000000246 R12:
00007fffb7b1b404
[ 28.904011] R13: 0000000000000014 R14: 000055cc506ee078 R15:
000055cc506eaf60
[ 28.905149] </TASK>
[ 28.906228]
================================================================================
A patch is however available for this issue:
https://gist.github.com/joanbm/9cd5fda1dcfab9a67b42cc6195b7b269
ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: bcmwl-kernel-source (not installed)
Uname: Linux 6.5.0-rc4 x86_64
NonfreeKernelModules: wl zfs
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Thu Aug 10 10:40:27 2023
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
SourcePackage: broadcom-sta
UpgradeStatus: No upgrade log present (probably fresh install)
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