diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-03 14:23:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-19 15:47:51 +0300 |
| commit | df3817ab226f8d7cb9164d88ff3958aa2b9ad8cc (patch) | |
| tree | a8ad0369af92b2d3ec04f10f59bfaf4cecec5bc2 /arch/x86 | |
| parent | ff2e93a03f8d5d7fcc0d0213cad90db904229111 (diff) | |
| download | linux-df3817ab226f8d7cb9164d88ff3958aa2b9ad8cc.tar.xz | |
x86/module: Fix the paravirt vs alternative order
commit 5adf349439d29f92467e864f728dfc23180f3ef9 upstream.
Ever since commit
4e6292114c74 ("x86/paravirt: Add new features for paravirt patching")
there is an ordering dependency between patching paravirt ops and
patching alternatives, the module loader still violates this.
Fixes: 4e6292114c74 ("x86/paravirt: Add new features for paravirt patching")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220303112825.068773913@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/module.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c index 867a341a0c7e..32e546e41629 100644 --- a/arch/x86/kernel/module.c +++ b/arch/x86/kernel/module.c @@ -270,6 +270,14 @@ int module_finalize(const Elf_Ehdr *hdr, orc_ip = s; } + /* + * See alternative_instructions() for the ordering rules between the + * various patching types. + */ + if (para) { + void *pseg = (void *)para->sh_addr; + apply_paravirt(pseg, pseg + para->sh_size); + } if (alt) { /* patch .altinstructions */ void *aseg = (void *)alt->sh_addr; @@ -283,11 +291,6 @@ int module_finalize(const Elf_Ehdr *hdr, tseg, tseg + text->sh_size); } - if (para) { - void *pseg = (void *)para->sh_addr; - apply_paravirt(pseg, pseg + para->sh_size); - } - /* make jump label nops */ jump_label_apply_nops(me); |