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| author |   Wen Yang <wen.yang99@zte.com.cn> | 2019-05-09 16:08:26 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-24 20:32:12 +0200 |
| commit | f5dd87326fefe42a4b1a4b1a1a695060c33a88d6 (patch) | |
| tree | b1fc2e5f2a388c40275d4e853a510a504308805e /drivers/fpga | |
| parent | Merge tag 'lkdtm-next' of https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into char-misc-linus (diff) | |
| download | linux-dev-f5dd87326fefe42a4b1a4b1a1a695060c33a88d6.tar.xz linux-dev-f5dd87326fefe42a4b1a4b1a1a695060c33a88d6.zip | |
fpga: stratix10-soc: fix use-after-free on s10_init()
The refcount of fw_np has already been decreased by of_find_matching_node()
so it shouldn't be used anymore.
This patch adds an of_node_get() before of_find_matching_node() to avoid
the use-after-free problem.
Fixes: e7eef1d7633a ("fpga: add intel stratix10 soc fpga manager driver")
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Alan Tull <atull@kernel.org>
Cc: Moritz Fischer <mdf@kernel.org>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: linux-fpga@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/stratix10-soc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c index 13851b3d1c56..215d33789c74 100644 --- a/drivers/fpga/stratix10-soc.c +++ b/drivers/fpga/stratix10-soc.c @@ -507,12 +507,16 @@ static int __init s10_init(void) if (!fw_np) return -ENODEV; + of_node_get(fw_np); np = of_find_matching_node(fw_np, s10_of_match); - if (!np) + if (!np) { + of_node_put(fw_np); return -ENODEV; + } of_node_put(np); ret = of_platform_populate(fw_np, s10_of_match, NULL, NULL); + of_node_put(fw_np); if (ret) return ret; |