FAILED: patch "[PATCH] SUNRPC: Fix rpcgss_context trace event acceptor field" failed to apply to 5.10-stable tree

The patch below does not apply to the 5.10-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 <[email protected]>.

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-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x a4833e3abae132d613ce7da0e0c9a9465d1681fa
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024041925-walnut-flammable-adf1@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

a4833e3abae1 ("SUNRPC: Fix rpcgss_context trace event acceptor field")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a4833e3abae132d613ce7da0e0c9a9465d1681fa Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (Google)" <[email protected]>
Date: Wed, 10 Apr 2024 12:38:13 -0400
Subject: [PATCH] SUNRPC: Fix rpcgss_context trace event acceptor field

The rpcgss_context trace event acceptor field is a dynamically sized string that records the "data" parameter. But this parameter is also dependent on the "len" field to determine the size of the data.

It needs to use __string_len() helper macro where the length can be passed in. It also incorrectly uses strncpy() to save it instead of __assign_str(). As these macros can change, it is not wise to open code them in trace events.

As of commit c759e609030c ("tracing: Remove __assign_str_len()"), __assign_str() can be used for both __string() and __string_len() fields. Before that commit, __assign_str_len() is required to be used. This needs to be noted for backporting. (In actuality, commit c1fa617caeb0 ("tracing:
Rework __assign_str() and __string() to not duplicate getting the string") is the commit that makes __string_str_len() obsolete).

index ba2d96a1bc2f..f50fcafc69de 100644
@@ -609,7 +609,7 @@ TRACE_EVENT(rpcgss_context,
 		__field(unsigned int, timeout)
 		__field(u32, window_size)
 		__field(int, len)
-		__string(acceptor, data)
+		__string_len(acceptor, data, len)
 	),
 
 	TP_fast_assign(

@@ -618,7 +618,7 @@ TRACE_EVENT(rpcgss_context,
 		__entry->timeout = timeout;
 		__entry->window_size = window_size;
 		__entry->len = len;
-		strncpy(__get_str(acceptor), data, len);
+		__assign_str(acceptor, data);
 	),
 
 	TP_printk("win_size=%u expiry=%lu now=%lu timeout=%u acceptor=%.*s",