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Subject[PATCH] module: prevent warning when finit_module a 0 sized file
Date
If we try to finit_module on a file sized 0 bytes vmalloc will
scream and spit out a warning.

Since modules have to be bigger than 0 bytes anyways we can just
check that beforehand and avoid the warning.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
kernel/module.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index 250092c..2e1ce2e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2527,6 +2527,12 @@ static int copy_module_from_fd(int fd, struct load_info *info)
err = -EFBIG;
goto out;
}
+
+ if (stat.size == 0) {
+ err = -EINVAL;
+ goto out;
+ }
+
info->hdr = vmalloc(stat.size);
if (!info->hdr) {
err = -ENOMEM;
--
1.8.0.2


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