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| author | Wen Yang <[email protected]> | 2019-05-09 21:08:26 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2019-05-24 18:32:12 +0000 |
| commit | f5dd87326fefe42a4b1a4b1a1a695060c33a88d6 (patch) | |
| tree | b1fc2e5f2a388c40275d4e853a510a504308805e /drivers/fpga/stratix10-soc.c | |
| parent | Merge tag 'lkdtm-next' of https://git.kernel.org/pub/scm/linux/kernel/git/kee... (diff) | |
| download | kernel-f5dd87326fefe42a4b1a4b1a1a695060c33a88d6.tar.gz kernel-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 <[email protected]>
Cc: Alan Tull <[email protected]>
Cc: Moritz Fischer <[email protected]>
Cc: Nicolas Saenz Julienne <[email protected]>
Cc: [email protected]
Cc: [email protected]
Reviewed-by: Moritz Fischer <[email protected]>
Reviewed-by: Nicolas Saenz Julienne <[email protected]>
Acked-by: Alan Tull <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/fpga/stratix10-soc.c')
| -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; |