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NFC: add NULL checks to avoid potential NULL pointer dereference

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NULL checks at line 457: if (!link0 || !link1) {, implies that both
pointers link0 and link1 might be NULL.
Function nfcsim_link_free() dereference pointers link0 and link1.
Add NULL checks before calling nfcsim_link_free() to avoid a
potential NULL pointer dereference.

Addresses-Coverity-ID: 1364857
Signed-off-by: Gustavo A. R. Silva <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Gustavo A. R. Silva 2017-05-30 15:43:07 -05:00 • committed by Samuel Ortiz
commit 6f874bafac
1 changed files with 4 additions and 2 deletions
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6
drivers/nfc/nfcsim.c
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@ -482,8 +482,10 @@ static int __init nfcsim_init(void)
exit_err:
pr_err("Failed to initialize nfcsim driver (%d)\n", rc);
nfcsim_link_free(link0);
nfcsim_link_free(link1);
if (link0)
nfcsim_link_free(link0);
if (link1)
nfcsim_link_free(link1);
return rc;
}