Public bug reported:
---
target: https://bugs.launchpad.net/ubuntu/+source/broadcom-sta
package: broadcom-sta-dkms
version: 6.30.223.271
---
# broadcom-sta-dkms 6.30.223.271 FTBFS on kernel 6.19: objtool rejects
proprietary blob
## Description
broadcom-sta-dkms fails to build against kernel 6.19.0-3-generic with
the following error:
```
wl.o: error: objtool: aes_cbc_encrypt_pad+0x4c: unannotated intra-function call
make[4]: ***
[/usr/src/linux-headers-6.19.0-3-generic/scripts/Makefile.build:503: wl.o]
Error 255
```
The issue occurs during the multi-object module link step. On kernel
6.19, `CONFIG_X86_KERNEL_IBT` is enabled, which sets `delay-objtool`
(via `scripts/Makefile.lib:200`). This causes objtool to run on the
final linked `wl.o`, where it chokes on the proprietary binary blob
`wlc_hybrid.o_amd64` which contains unannotated intra-function calls
that cannot be fixed in source.
`OBJECT_FILES_NON_STANDARD := y` in the module Makefile does not help
because for multi-object modules, `objtool-enabled` is set directly from
`delay-objtool` (`scripts/Makefile.build:500`), bypassing the
`OBJECT_FILES_NON_STANDARD` check.
## Fix
Pass `objtool=/bin/true` (lowercase) in the DKMS make command so the
objtool invocation becomes a no-op. In `/usr/src/broadcom-
sta-6.30.223.271/dkms.conf`, change:
```
MAKE[0]="make KVER=$kernelver"
```
to:
```
MAKE[0]="make KVER=$kernelver objtool=/bin/true"
```
## Environment
- Ubuntu 25.10 (plucky)
- Kernel: 6.19.0-3-generic (x86_64)
- Package version: broadcom-sta-dkms 6.30.223.271
- Hardware: Broadcom BCM4360 802.11ac (rev 03) [PCI 14e4:43a0]
## Steps to reproduce
1. `sudo apt install broadcom-sta-dkms`
2. Build fails automatically during DKMS install
## Full build log
```
DKMS (dkms-3.2.0) make.log for broadcom-sta/6.30.223.271 for kernel
6.19.0-3-generic (x86_64)
Building module(s)
# command: make -j4 KERNELRELEASE=6.19.0-3-generic KVER=6.19.0-3-generic
CFG80211 API is prefered for this kernel version
Makefile:91: Neither CFG80211 nor Wireless Extension is enabled in kernel
KBUILD_NOPEDANTIC=1 make -C /lib/modules/6.19.0-3-generic/build M=`pwd`
make[1]: Entering directory '/usr/src/linux-headers-6.19.0-3-generic'
make[2]: Entering directory '/var/lib/dkms/broadcom-sta/6.30.223.271/build'
warning: the compiler differs from the one used to build the kernel
The kernel was built by: x86_64-linux-gnu-gcc (Ubuntu 15.2.0-12ubuntu1) 15.2.0
You are using: gcc (Ubuntu 15.2.0-12ubuntu1) 15.2.0
CFG80211 API is prefered for this kernel version
Using CFG80211 API
Kernel architecture is X86_64
CC [M] src/shared/linux_osl.o
CC [M] src/wl/sys/wl_linux.o
CC [M] src/wl/sys/wl_iw.o
CC [M] src/wl/sys/wl_cfg80211_hybrid.o
LD [M] wl.o
wl.o: error: objtool: aes_cbc_encrypt_pad+0x4c: unannotated intra-function call
make[4]: ***
[/usr/src/linux-headers-6.19.0-3-generic/scripts/Makefile.build:503: wl.o]
Error 255
make[4]: *** Deleting file 'wl.o'
make[3]: *** [/usr/src/linux-headers-6.19.0-3-generic/Makefile:2059: .] Error 2
make[2]: *** [/usr/src/linux-headers-6.19.0-3-generic/Makefile:248: __sub-make]
Error 2
make[2]: Leaving directory '/var/lib/dkms/broadcom-sta/6.30.223.271/build'
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-6.19.0-3-generic'
make: *** [Makefile:184: all] Error 2
```
** Affects: broadcom-sta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2144392
Title:
broadcom-sta-dkms 6.30.223.271 FTBFS on kernel 6.19: objtool rejects
proprietary blob
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