An alternative: make find_tempdir set tempdir to default_tempdir upon malloc failure. * arch/um/os-Linux/mem.c (make_tempfile): Handle NULL tempdir. Don't let a long tempdir (e.g., via TMPDIR) provoke heap corruption. Signed-off-by: Jim Meyering <meyering@xxxxxxxxxx> --- arch/um/os-Linux/mem.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c index e114d09..1458385 100644 --- a/arch/um/os-Linux/mem.c +++ b/arch/um/os-Linux/mem.c @@ -176,6 +176,9 @@ int __init make_tempfile(const char *template, char **out_tempname, return -1; find_tempdir(); + if (tempdir == NULL || strlen(tempdir) >= MAXPATHLEN) + return -1; + if (template[0] != '/') strcpy(tempname, tempdir); else -- 1.5.4.19.gd3dfd - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
