[PATCH 0/5] livepatch: Fail object initialization on duplicate patched function
From: Petr Mladek <pmladek@suse.com>
Date: 2026-09-08 12:02:10
This is v4 of the patch failing object initialization when it patches
the same underlying function twice through two aliased symbols
(functions sharing one address) in the same object.
Changes against [v3]:
+ Add selftest for livepatching aliased symbols [Song, Harry]
+ Only partially revert relocations when failing inside
klp_apply_object_relocs() [Sashiko]
+ Cleanup changes made by klp_init_object_loaded() for failing
patch on another failures in klp_module_coming() [Sashiko]
Changes against [v2]:
+ Clarify comments and the commit message [Miroslav]
+ Cleanup when klp_init_object_loaded() fails [Sashiko]
[v2] https://lore.kernel.org/r/20260823060734.58443-1-x90613@gmail.com
[v3] https://lore.kernel.org/r/20260830173343.52759-1-x90613@gmail.com
Harry Hsu (2):
livepatch: Fail object initialization on duplicate patched function
selftests/livepatch: Test rejection of aliased symbols in one object
Petr Mladek (3):
livepatch: Move code for updating livepatch object relocations
livepatch: Clear relocations when klp_apply_object_relocs() fails
livepatch: Clean up klp_init_object_loaded() when fails
kernel/livepatch/core.c | 137 ++++++++++++------
tools/testing/selftests/livepatch/Makefile | 3 +-
.../testing/selftests/livepatch/test-alias.sh | 81 +++++++++++
.../selftests/livepatch/test_modules/Makefile | 4 +-
.../test_modules/test_klp_alias_patch.c | 62 ++++++++
.../test_modules/test_klp_alias_target.c | 48 ++++++
6 files changed, 285 insertions(+), 50 deletions(-)
create mode 100755 tools/testing/selftests/livepatch/test-alias.sh
create mode 100644 tools/testing/selftests/livepatch/test_modules/test_klp_alias_patch.c
create mode 100644 tools/testing/selftests/livepatch/test_modules/test_klp_alias_target.c
--
2.55.0