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livepatching changes for 6.19 

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Merge tag 'livepatching-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching

Pull livepatching updates from Petr Mladek:

 - Support both paths where tracefs is typically mounted in selftests

 - Make old_sympos 0 and 1 equal. They both are valid when there is only
   one symbol with the given name.

* tag 'livepatching-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
  selftests: livepatch: use canonical ftrace path
  livepatch: Match old_sympos 0 and 1 in klp_find_func()
This commit is contained in:
Linus Torvalds 2025-12-03 13:46:48 -08:00
parent 02baaa67d9 5cb5575308
commit 51ab33fc0a
2 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/livepatch/core.c
View File

@ -88,8 +88,14 @@ static struct klp_func *klp_find_func(struct klp_object *obj,
struct klp_func *func;
klp_for_each_func(obj, func) {
/*
* Besides identical old_sympos, also consider old_sympos
* of 0 and 1 are identical.
*/
if ((strcmp(old_func->old_name, func->old_name) == 0) &&
(old_func->old_sympos == func->old_sympos)) {
((old_func->old_sympos == func->old_sympos) ||
(old_func->old_sympos == 0 && func->old_sympos == 1) ||
(old_func->old_sympos == 1 && func->old_sympos == 0))) {
return func;
}
}

6
tools/testing/selftests/livepatch/functions.sh
View File

@ -10,7 +10,11 @@ SYSFS_KERNEL_DIR="/sys/kernel"
SYSFS_KLP_DIR="$SYSFS_KERNEL_DIR/livepatch"
SYSFS_DEBUG_DIR="$SYSFS_KERNEL_DIR/debug"
SYSFS_KPROBES_DIR="$SYSFS_DEBUG_DIR/kprobes"
SYSFS_TRACING_DIR="$SYSFS_DEBUG_DIR/tracing"
if [[ -e /sys/kernel/tracing/trace ]]; then
SYSFS_TRACING_DIR="$SYSFS_KERNEL_DIR/tracing"
else
SYSFS_TRACING_DIR="$SYSFS_DEBUG_DIR/tracing"
fi
# Kselftest framework requirement - SKIP code is 4
ksft_skip=4