Bug 291271 - qat_common.ko missing symbol exports -- dependent modules fail to load with module loader local symbol resolution disabled
Summary: qat_common.ko missing symbol exports -- dependent modules fail to load with m...
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 16.0-CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks: 207898
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Reported: 2025-11-28 18:11 UTC by Ed Maste
Modified: 2025-12-06 19:36 UTC (History)
1 user (show)

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Description Ed Maste freebsd_committer freebsd_triage 2025-11-28 18:11:21 UTC 
See https://lists.freebsd.org/archives/freebsd-current/2025-November/009500.html for background.

To reproduce, set
debug.link_elf_leak_locals=0
debug.link_elf_obj_leak_locals=0
then

# kldload qat.ko
link_elf_obj: symbol M_QAT undefined
linker_load_file: /boot/kernel/qat_api.ko - unsupported file type

The module's Makefile should have an EXPORT_SYMS= line that lists all of the symbols to be intentionally exported.

Another option is to just set EXPORT_SYMS=YES.  An explicit export list is preferred over EXPORT_SYMS=YES, unless we explicitly want all symbols exported.
Comment 1 Rupesh Pilania 2025-12-06 19:36:59 UTC 
Changes available here: https://reviews.freebsd.org/D54107