From: Menglong Dong <dong.menglong@xxxxxxxxxx>
'format_corename()' will splite 'core_pattern' on spaces when it
is in pipe mode, and take helper_argv[0] as the path to usermode
executable.
It works fine in most cases. However, if there is a space between
'|' and '/file/path', such as
'| /usr/lib/systemd/systemd-coredump %P %u %g',
helper_argv[0] will be parsed as '', and users will get a
'Core dump to | disabled'.
It is not friendly to users, as the pattern above was valid previously.
Fix this by ignoring the spaces between '|' and '/file/path'.
Fixes: 315c69261dd3 ("coredump: split pipe command whitespace before expanding template")
Signed-off-by: Menglong Dong <dong.menglong@xxxxxxxxxx>
---
fs/coredump.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/coredump.c b/fs/coredump.c
index 0cd9056d79cc..c6acfc694f65 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -229,7 +229,8 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm,
*/
if (ispipe) {
if (isspace(*pat_ptr)) {
- was_space = true;
+ if (cn->used != 0)
+ was_space = true;
pat_ptr++;
continue;
} else if (was_space) {
--
2.25.1
