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authorMasami Hiramatsu <mhiramat@kernel.org>2021-09-14 17:40:36 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-10-01 04:24:06 +0300
commitf2ec8d9a3b8c0f22cd6a2b4f5a2d9aee5206e3b7 (patch)
tree062bc0312dc8c349e621742940d6a4345b747aa2 /lib/error-inject.c
parenta7fe2378454cf46cd5e2776d05e72bbe8f0a468c (diff)
downloadlinux-f2ec8d9a3b8c0f22cd6a2b4f5a2d9aee5206e3b7.tar.xz
kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_descriptor()
~15 years ago kprobes grew the 'arch_deref_entry_point()' __weak function: 3d7e33825d87: ("jprobes: make jprobes a little safer for users") But this is just open-coded dereference_symbol_descriptor() in essence, and its obscure nature was causing bugs. Just use the real thing and remove arch_deref_entry_point(). Link: https://lkml.kernel.org/r/163163043630.489837.7924988885652708696.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'lib/error-inject.c')
-rw-r--r--lib/error-inject.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/error-inject.c b/lib/error-inject.c
index c73651b15b76..2ff5ef689d72 100644
--- a/lib/error-inject.c
+++ b/lib/error-inject.c
@@ -8,6 +8,7 @@
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/slab.h>
+#include <asm/sections.h>
/* Whitelist of symbols that can be overridden for error injection. */
static LIST_HEAD(error_injection_list);
@@ -64,7 +65,7 @@ static void populate_error_injection_list(struct error_injection_entry *start,
mutex_lock(&ei_mutex);
for (iter = start; iter < end; iter++) {
- entry = arch_deref_entry_point((void *)iter->addr);
+ entry = (unsigned long)dereference_symbol_descriptor((void *)iter->addr);
if (!kernel_text_address(entry) ||
!kallsyms_lookup_size_offset(entry, &size, &offset)) {