diff options
| author | Shengming Hu <hu.shengming@zte.com.cn> | 2025-11-26 17:29:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-08 10:16:57 +0100 |
| commit | c0a565f133f385f15e69db46e4a9f8d35fe2afca (patch) | |
| tree | 6d742912abf5422857b84ec05e9ddfc242e0bd59 /kernel | |
| parent | 7c8b636d3ce7cca14ca29fbbe0621a59f73ac67e (diff) | |
| download | linux-c0a565f133f385f15e69db46e4a9f8d35fe2afca.tar.gz linux-c0a565f133f385f15e69db46e4a9f8d35fe2afca.tar.bz2 linux-c0a565f133f385f15e69db46e4a9f8d35fe2afca.zip | |
fgraph: Initialize ftrace_ops->private for function graph ops
commit b5d6d3f73d0bac4a7e3a061372f6da166fc6ee5c upstream.
The ftrace_pids_enabled(op) check relies on op->private being properly
initialized, but fgraph_ops's underlying ftrace_ops->private was left
uninitialized. This caused ftrace_pids_enabled() to always return false,
effectively disabling PID filtering for function graph tracing.
Fix this by copying src_ops->private to dst_ops->private in
fgraph_init_ops(), ensuring PID filter state is correctly propagated.
Cc: stable@vger.kernel.org
Cc: <wang.yaxin@zte.com.cn>
Cc: <mhiramat@kernel.org>
Cc: <mark.rutland@arm.com>
Cc: <mathieu.desnoyers@efficios.com>
Cc: <zhang.run@zte.com.cn>
Cc: <yang.yang29@zte.com.cn>
Fixes: c132be2c4fcc1 ("function_graph: Have the instances use their own ftrace_ops for filtering")
Link: https://patch.msgid.link/20251126172926004y3hC8QyU4WFOjBkU_UxLC@zte.com.cn
Signed-off-by: Shengming Hu <hu.shengming@zte.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/fgraph.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c index 484ad7a18463..d6222bb99d1d 100644 --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -1019,6 +1019,7 @@ void fgraph_init_ops(struct ftrace_ops *dst_ops, mutex_init(&dst_ops->local_hash.regex_lock); INIT_LIST_HEAD(&dst_ops->subop_list); dst_ops->flags |= FTRACE_OPS_FL_INITIALIZED; + dst_ops->private = src_ops->private; } #endif } |