From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Wenwen Wang <wenwen@cs.uga.edu>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Sasha Levin <sashal@kernel.org>,
linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 101/128] ACPI / PCI: fix acpi_pci_irq_enable() memory leak
Date: Sun, 22 Sep 2019 14:53:51 -0400 [thread overview]
Message-ID: <20190922185418.2158-101-sashal@kernel.org> (raw)
In-Reply-To: <20190922185418.2158-1-sashal@kernel.org>
From: Wenwen Wang <wenwen@cs.uga.edu>
[ Upstream commit 29b49958cf73b439b17fa29e9a25210809a6c01c ]
In acpi_pci_irq_enable(), 'entry' is allocated by kzalloc() in
acpi_pci_irq_check_entry() (invoked from acpi_pci_irq_lookup()). However,
it is not deallocated if acpi_pci_irq_valid() returns false, leading to a
memory leak. To fix this issue, free 'entry' before returning 0.
Fixes: e237a5518425 ("x86/ACPI/PCI: Recognize that Interrupt Line 255 means "not connected"")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/acpi/pci_irq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index c576a6fe4ebb3..94ded9513c73b 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -462,8 +462,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
* No IRQ known to the ACPI subsystem - maybe the BIOS /
* driver reported one, then use it. Exit in any case.
*/
- if (!acpi_pci_irq_valid(dev, pin))
+ if (!acpi_pci_irq_valid(dev, pin)) {
+ kfree(entry);
return 0;
+ }
if (acpi_isa_register_gsi(dev))
dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
--
2.20.1
prev parent reply other threads:[~2019-09-22 19:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190922185418.2158-1-sashal@kernel.org>
2019-09-22 18:52 ` [PATCH AUTOSEL 4.19 036/128] ACPI / processor: don't print errors for processorIDs == 0xff Sasha Levin
2019-09-22 18:53 ` [PATCH AUTOSEL 4.19 084/128] ACPI / CPPC: do not require the _PSD method Sasha Levin
2019-09-22 18:53 ` [PATCH AUTOSEL 4.19 100/128] ACPI: custom_method: fix memory leaks Sasha Levin
2019-09-22 18:53 ` Sasha Levin [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190922185418.2158-101-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=rafael.j.wysocki@intel.com \
--cc=stable@vger.kernel.org \
--cc=wenwen@cs.uga.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).