6.16-stable review patch. If anyone has any objections, please let me know.
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From: Steven Rostedt rostedt@goodmis.org
[ Upstream commit c89504a703fb779052213add0e8ed642f4a4f1c8 ]
Several places in the trace.c file there's a goto out where the out is simply a return. There's no reason to jump to the out label if it's not doing any more logic but simply returning from the function.
Replace the goto outs with a return and remove the out labels.
Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Mark Rutland mark.rutland@arm.com Cc: Mathieu Desnoyers mathieu.desnoyers@efficios.com Cc: Andrew Morton akpm@linux-foundation.org Link: https://lore.kernel.org/20250801203857.538726745@kernel.org Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org Stable-dep-of: 6a909ea83f22 ("tracing: Limit access to parser->buffer when trace_get_user failed") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/trace/trace.c | 38 +++++++++++++++----------------------- 1 file changed, 15 insertions(+), 23 deletions(-)
--- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1846,7 +1846,7 @@ int trace_get_user(struct trace_parser *
ret = get_user(ch, ubuf++); if (ret) - goto out; + return ret;
read++; cnt--; @@ -1860,7 +1860,7 @@ int trace_get_user(struct trace_parser * while (cnt && isspace(ch)) { ret = get_user(ch, ubuf++); if (ret) - goto out; + return ret; read++; cnt--; } @@ -1870,8 +1870,7 @@ int trace_get_user(struct trace_parser * /* only spaces were written */ if (isspace(ch) || !ch) { *ppos += read; - ret = read; - goto out; + return read; } }
@@ -1879,13 +1878,12 @@ int trace_get_user(struct trace_parser * while (cnt && !isspace(ch) && ch) { if (parser->idx < parser->size - 1) parser->buffer[parser->idx++] = ch; - else { - ret = -EINVAL; - goto out; - } + else + return -EINVAL; + ret = get_user(ch, ubuf++); if (ret) - goto out; + return ret; read++; cnt--; } @@ -1900,15 +1898,11 @@ int trace_get_user(struct trace_parser * /* Make sure the parsed string always terminates with '\0'. */ parser->buffer[parser->idx] = 0; } else { - ret = -EINVAL; - goto out; + return -EINVAL; }
*ppos += read; - ret = read; - -out: - return ret; + return read; }
/* TODO add a seq_buf_to_buffer() */ @@ -2410,10 +2404,10 @@ int __init register_tracer(struct tracer mutex_unlock(&trace_types_lock);
if (ret || !default_bootup_tracer) - goto out_unlock; + return ret;
if (strncmp(default_bootup_tracer, type->name, MAX_TRACER_SIZE)) - goto out_unlock; + return 0;
printk(KERN_INFO "Starting tracer '%s'\n", type->name); /* Do we want this tracer to start on bootup? */ @@ -2425,8 +2419,7 @@ int __init register_tracer(struct tracer /* disable other selftests, since this will break it. */ disable_tracing_selftest("running a tracer");
- out_unlock: - return ret; + return 0; }
static void tracing_reset_cpu(struct array_buffer *buf, int cpu) @@ -8954,12 +8947,12 @@ ftrace_trace_snapshot_callback(struct tr out_reg: ret = tracing_arm_snapshot(tr); if (ret < 0) - goto out; + return ret;
ret = register_ftrace_function_probe(glob, tr, ops, count); if (ret < 0) tracing_disarm_snapshot(tr); - out: + return ret < 0 ? ret : 0; }
@@ -11057,7 +11050,7 @@ __init static int tracer_alloc_buffers(v BUILD_BUG_ON(TRACE_ITER_LAST_BIT > TRACE_FLAGS_MAX_SIZE);
if (!alloc_cpumask_var(&tracing_buffer_mask, GFP_KERNEL)) - goto out; + return -ENOMEM;
if (!alloc_cpumask_var(&global_trace.tracing_cpumask, GFP_KERNEL)) goto out_free_buffer_mask; @@ -11175,7 +11168,6 @@ out_free_cpumask: free_cpumask_var(global_trace.tracing_cpumask); out_free_buffer_mask: free_cpumask_var(tracing_buffer_mask); -out: return ret; }