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| author | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2021-12-09 09:13:07 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-14 10:16:53 +0100 |
| commit | 811a7576747760bcaf60502f096d1e6e91d566fa (patch) | |
| tree | 82abf2d36494e8c9ee4cb300d3ccd0fb7982e07b | |
| parent | c8718026ba287168ff9ad0ccc4f9a413062cba36 (diff) | |
| download | linux-stable-811a7576747760bcaf60502f096d1e6e91d566fa.tar.gz linux-stable-811a7576747760bcaf60502f096d1e6e91d566fa.tar.bz2 linux-stable-811a7576747760bcaf60502f096d1e6e91d566fa.zip | |
nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
commit 4cd8371a234d051f9c9557fcbb1f8c523b1c0d10 upstream.
The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).
Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211209081307.57337-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/nfc/netlink.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 18957fbf37ff..d7a2580f0420 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -1400,8 +1400,10 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb) { struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; - nfc_device_iter_exit(iter); - kfree(iter); + if (iter) { + nfc_device_iter_exit(iter); + kfree(iter); + } return 0; } |