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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-05-14 05:45:59 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-05-14 05:45:59 -0300
commitc91265cd0efb83778f015b4d4b1129bd2cfd075e (patch)
treec9e2ebed36b5a70f0d7c58cb7e3d36e823ccde9f /fs/proc
parenta5cdf7364020a61375af3c8aa23e09181f5c2c6c (diff)
Linux-libre 4.5.4-gnupck-4.5.4-gnu
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 11aba74cb..80e4bc69f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -955,7 +955,8 @@ static ssize_t environ_read(struct file *file, char __user *buf,
struct mm_struct *mm = file->private_data;
unsigned long env_start, env_end;
- if (!mm)
+ /* Ensure the process spawned far enough to have an environment. */
+ if (!mm || !mm->env_end)
return 0;
page = (char *)__get_free_page(GFP_TEMPORARY);