The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x e5c624f027ac74f97e97c8f36c69228ac9f1102d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2023092033-smother-cannabis-e03d@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: e5c624f027ac ("tracing: Have event inject files inc the trace array ref count") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e5c624f027ac74f97e97c8f36c69228ac9f1102d Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx> Date: Wed, 6 Sep 2023 22:47:16 -0400 Subject: [PATCH] tracing: Have event inject files inc the trace array ref count The event inject files add events for a specific trace array. For an instance, if the file is opened and the instance is deleted, reading or writing to the file will cause a use after free. Up the ref count of the trace_array when a event inject file is opened. Link: https://lkml.kernel.org/r/20230907024804.292337868@xxxxxxxxxxx Link: https://lore.kernel.org/all/1cb3aee2-19af-c472-e265-05176fe9bd84@xxxxxxxxxx/ Cc: stable@xxxxxxxxxxxxxxx Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Zheng Yejian <zhengyejian1@xxxxxxxxxx> Fixes: 6c3edaf9fd6a ("tracing: Introduce trace event injection") Tested-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> diff --git a/kernel/trace/trace_events_inject.c b/kernel/trace/trace_events_inject.c index abe805d471eb..8650562bdaa9 100644 --- a/kernel/trace/trace_events_inject.c +++ b/kernel/trace/trace_events_inject.c @@ -328,7 +328,8 @@ event_inject_read(struct file *file, char __user *buf, size_t size, } const struct file_operations event_inject_fops = { - .open = tracing_open_generic, + .open = tracing_open_file_tr, .read = event_inject_read, .write = event_inject_write, + .release = tracing_release_file_tr, };
