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44 lines
1.5 KiB
Diff
44 lines
1.5 KiB
Diff
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From 8756624acb1e090b45baf07b2a8d0ebde114000e Mon Sep 17 00:00:00 2001
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From: Saket Saurabh <ssaurabh@codeaurora.org>
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Date: Mon, 30 Sep 2013 17:33:57 +0530
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Subject: ehci-msm2: Add boundary check in echi driver
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This change adds boundary check before copying data from userspace
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buffer to ehci local buffer.
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The third parameter passed to copy_from_user() should be minimum of the two
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values between userpsace buffer size count and (local_buffer size - 1). The
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last one byte in local_buffer should be reserved for null terminator.
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CRs-Fixed: 547910
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Change-Id: Id3c5432aa3fae3ce9759056b5481b9f516df7764
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Signed-off-by: Saket Saurabh <ssaurabh@codeaurora.org>
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---
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drivers/usb/host/ehci-msm2.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/drivers/usb/host/ehci-msm2.c b/drivers/usb/host/ehci-msm2.c
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index 221af44..32ed806 100644
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--- a/drivers/usb/host/ehci-msm2.c
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+++ b/drivers/usb/host/ehci-msm2.c
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@@ -1059,7 +1059,7 @@ static ssize_t debug_write_phy_data(struct file *file, const char __user *buf,
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memset(kbuf, 0, 10);
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- if (copy_from_user(kbuf, buf, count > 10 ? 10 : count))
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+ if (copy_from_user(kbuf, buf, min_t(size_t, sizeof(kbuf) - 1, count)))
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return -EFAULT;
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if (sscanf(kbuf, "%x", &data) != 1)
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@@ -1084,7 +1084,7 @@ static ssize_t debug_phy_write_addr(struct file *file, const char __user *buf,
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memset(kbuf, 0, 10);
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- if (copy_from_user(kbuf, buf, count > 10 ? 10 : count))
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+ if (copy_from_user(kbuf, buf, min_t(size_t, sizeof(kbuf) - 1, count)))
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return -EFAULT;
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if (sscanf(kbuf, "%x", &temp) != 1)
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--
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cgit v1.1
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