This is a note to let you know that I've just added the patch titled
tracing/kprobes: Fix symbol counting logic by looking at modules as well
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-kprobes-fix-symbol-counting-logic-by-looking.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 50f65ec48f6fb336d3128b57dc7a086bab21ac5c
Author: Andrii Nakryiko <andrii@xxxxxxxxxx>
Date: Tue Oct 8 15:29:48 2024 -0700
tracing/kprobes: Fix symbol counting logic by looking at modules as well
commit 926fe783c8a64b33997fec405cf1af3e61aed441 upstream.
Recent changes to count number of matching symbols when creating
a kprobe event failed to take into account kernel modules. As such, it
breaks kprobes on kernel module symbols, by assuming there is no match.
Fix this my calling module_kallsyms_on_each_symbol() in addition to
kallsyms_on_each_match_symbol() to perform a proper counting.
Link: https://lore.kernel.org/all/20231027233126.2073148-1-andrii@xxxxxxxxxx/
Cc: Francis Laniel <flaniel@xxxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Fixes: b022f0c7e404 ("tracing/kprobes: Return EADDRNOTAVAIL when func matches several symbols")
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Acked-by: Song Liu <song@xxxxxxxxxx>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Signed-off-by: Markus Boehme <markubo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
[Sherry: It's a fix for previous backport, thus backport together]
Signed-off-by: Sherry Yang <sherry.yang@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 91dfe8cf1ce8b..ae059345ddf4c 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -742,6 +742,8 @@ static unsigned int number_of_same_symbols(char *func_name)
kallsyms_on_each_symbol(count_symbols, &args);
+ module_kallsyms_on_each_symbol(count_symbols, &args);
+
return args.count;
}
