2017-11-07 17:32:46 -05:00
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From 9b209c4552779edb86221787fb8681dd212e3a0c Mon Sep 17 00:00:00 2001
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2017-10-29 01:48:53 -04:00
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From: Mohit Aggarwal <maggarwa@codeaurora.org>
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Date: Sat, 22 Apr 2017 10:49:18 +0530
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Subject: diag: dci: Add protection while querying event status
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Currently, protection is missing when querying event
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status due to which already removed dci client entry
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might be accessed. This patch takes care of issue by
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taking proper locking.
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CRs-Fixed: 2015892
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Change-Id: I4195c4c6198d85e96559f1728d74419527a76bc5
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Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>
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---
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drivers/char/diag/diagchar_core.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/drivers/char/diag/diagchar_core.c b/drivers/char/diag/diagchar_core.c
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2017-11-07 17:32:46 -05:00
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index 574a13d..9a5f196 100644
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2017-10-29 01:48:53 -04:00
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--- a/drivers/char/diag/diagchar_core.c
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+++ b/drivers/char/diag/diagchar_core.c
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2017-11-07 17:32:46 -05:00
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@@ -2336,7 +2336,9 @@ long diagchar_ioctl(struct file *filp,
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mutex_unlock(&driver->dci_mutex);
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2017-10-29 01:48:53 -04:00
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break;
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case DIAG_IOCTL_DCI_EVENT_STATUS:
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+ mutex_lock(&driver->dci_mutex);
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result = diag_ioctl_dci_event_status(ioarg);
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+ mutex_unlock(&driver->dci_mutex);
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break;
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case DIAG_IOCTL_DCI_CLEAR_LOGS:
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2017-11-07 17:32:46 -05:00
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mutex_lock(&driver->dci_mutex);
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2017-10-29 01:48:53 -04:00
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--
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cgit v1.1
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