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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-17 02:17:59 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-17 02:17:59 -0400 |
| commit | 0e0162bb8c008fa7742f69d4d4982c8a37b88f95 (patch) | |
| tree | 4b230ab63b5698a44d2948e70a6cc22405c351e9 /fs/proc/base.c | |
| parent | ae05327a00fd47c34dfe25294b359a3f3fef96e8 (diff) | |
| parent | 38b78a5f18584db6fa7441e0f4531b283b0e6725 (diff) | |
Merge branch 'ovl-fixes' into for-linus
Backmerge to resolve a conflict in ovl_lookup_real();
"ovl_lookup_real(): use lookup_one_len_unlocked()" instead,
but it was too late in the cycle to rebase.
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index beb45d47bf77..8c1f2eae471e 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); |