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ANDROID: xt_quota2: remove trailing junk which might have a digit in it

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Make sure string only contains the characters specified by userspace.

Fix cherry-picked from xtables-extensions project

Signed-off-by: Sam Liddicott <sam@liddicott.com>
Bug: 196046570
Test: passed netd test suites
Fixes: 10cda83af9 ("ANDROID: netfilter: xt_quota2: adding the
original quota2 from xtables-addons")
Signed-off-by: Todd Kjos <tkjos@google.com>
(cherry picked from https://git.code.sf.net/p/xtables-addons/xtables-addons
bc2bcc383c70b293bd816c29523a952ca8736fb5)
Change-Id: I965448564906e5fbf0fe6d6414f44d9e257ea195
This commit is contained in:
Sam Liddicott
2014-01-07 09:21:53 -08:00
committed by Todd Kjos
parent 9f19de4e29
commit 4b05a506bd
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/xt_quota2.c
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@@ -162,6 +162,8 @@ static ssize_t quota_proc_write(struct file *file, const char __user *input,
if (copy_from_user(buf, input, size) != 0) if (copy_from_user(buf, input, size) != 0)
return -EFAULT; return -EFAULT;
buf[sizeof(buf)-1] = '\0'; buf[sizeof(buf)-1] = '\0';
if (size < sizeof(buf))
buf[size] = '\0';
spin_lock_bh(&e->lock); spin_lock_bh(&e->lock);
e->quota = simple_strtoull(buf, NULL, 0); e->quota = simple_strtoull(buf, NULL, 0);