On 6/27/22 04:22, Greg Kroah-Hartman wrote:
From: Masahiro Yamada masahiroy@kernel.org
commit 28438794aba47a27e922857d27b31b74e8559143 upstream.
Since commit f02e8a6596b7 ("module: Sort exported symbols"), EXPORT_SYMBOL* is placed in the individual section ___ksymtab(_gpl)+<sym> (3 leading underscores instead of 2).
Since then, modpost cannot detect the bad combination of EXPORT_SYMBOL and __init/__exit.
Fix the .fromsec field.
Fixes: f02e8a6596b7 ("module: Sort exported symbols") Signed-off-by: Masahiro Yamada masahiroy@kernel.org Reviewed-by: Nick Desaulniers ndesaulniers@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
This commit causes the following warning to show up on my kernel builds used for testing 5.4 stable candidates:
WARNING: vmlinux.o(___ksymtab+drm_fb_helper_modinit+0x0): Section mismatch in reference from the variable __ksymtab_drm_fb_helper_modinit to the function .init.text:drm_fb_helper_modinit() The symbol drm_fb_helper_modinit is exported and annotated __init Fix this by removing the __init annotation of drm_fb_helper_modinit or drop the export.
The kernel configuration to reproduce this is located here (this is 5.10 but works in 5.4 as well):
https://gist.github.com/2c3e8edd5ceb089c8040db724073d941
Same applies to the 5.10, 5.15 and 5.18 stable queues FWIW.