From: classabbyamp <classabbyamp@users.noreply.github.com>
To: ml@inbox.vuxu.org
Subject: [ISSUE] cross-built kernel cannot load externally-built modules
Date: Wed, 26 Jun 2024 02:13:13 +0200 [thread overview]
Message-ID: <gh-mailinglist-notifications-41a7ca26-5023-4802-975b-f1789d68868e-void-packages-51005@inbox.vuxu.org> (raw)
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New issue by classabbyamp on void-packages repository
https://github.com/void-linux/void-packages/issues/51005
Description:
### System Info
Void 6.8.12_2 aarch64-glibc
### Package(s) Affected
linux6.8 at minimum, probably other `linux6.*` kernels (rpi-kernel is *not* affected)
if built natively, this issue does not occur
### Expected behaviour
externally-built (dkms or other mechanism) modules load successfully
```
nm --print-size --size-sort hello.ko | grep __this_module
0000000000000000 0000000000000500 D __this_module
```
### Actual behaviour
```
# modprobe hello
modprobe: ERROR: could not insert 'hello': Exec format error
```
dmesg:
```
[...] module hello: .gnu.linkonce.this_module section size must match the kernel's built struct module size at run time
```
```
nm --print-size --size-sort hello.ko | grep __this_module
0000000000000000 00000000000004c0 D __this_module
```
### Steps to reproduce
```sh
mkdir -p hello-mod && cd hello-mod
cat <<EOF > Makefile
obj-m += hello.o
PWD := $(CURDIR)
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
EOF
cat <<EOF > hello.c
#include <linux/module.h>
#include <linux/printk.h>
int init_module(void) {
pr_info("hello");
return 0;
}
void cleanup_module(void) {
pr_info("goodbye");
}
MODULE_LICENSE("GPL");
EOF
make
sudo modprobe ./hello.ko
```
### Notes
Error message introduced by https://lore.kernel.org/lkml/ZBuShv1hx03WmzH4@bombadil.infradead.org/T/
next reply other threads:[~2024-06-26 0:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-26 0:13 classabbyamp [this message]
2024-06-26 17:03 ` [ISSUE] [CLOSED] " classabbyamp
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