[PATCH] column: disallow negative padding

[Kristoffer Haugsbakk <code@khaugsbakk.name>]

A negative padding can cause some problems in the memory allocator:

• floating point exception
• data too large to fit into virtual memory space
• OOM

Disallow negative padding. Reuse a translation string from
`fast-import`.

Reported-by: Tiago Pascoal <tiago@pascoal.net>
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
---
 builtin/column.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/builtin/column.c b/builtin/column.c
index e80218f81f9..82902d149c2 100644
--- a/builtin/column.c
+++ b/builtin/column.c
@@ -45,6 +45,8 @@ int cmd_column(int argc, const char **argv, const char *prefix)
 	memset(&copts, 0, sizeof(copts));
 	copts.padding = 1;
 	argc = parse_options(argc, argv, prefix, options, builtin_column_usage, 0);
+	if (copts.padding < 0)
+		die("%s: argument must be a non-negative integer", "padding");
 	if (argc)
 		usage_with_options(builtin_column_usage, options);
 	if (real_command || command) {
-- 
2.43.0