iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/powernv/sriov: perform null check on iov before dereferencing iov

Browse Source 
[ Upstream commit f4f913c980bc6abe0ccfe88fe3909c125afe4a2d ]

Currently pointer iov is being dereferenced before the null check of iov
which can lead to null pointer dereference errors. Fix this by moving the
iov null check before the dereferencing.

Detected using cppcheck static analysis:
linux/arch/powerpc/platforms/powernv/pci-sriov.c:597:12: warning: Either
the condition '!iov' is redundant or there is possible null pointer
dereference: iov. [nullPointerRedundantCheck]
 num_vfs = iov->num_vfs;
           ^

Fixes: 052da31d45fc ("powerpc/powernv/sriov: De-indent setup and teardown")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230608095849.1147969-1-colin.i.king@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2023-06-08 10:58:49 +01:00 committed by Greg Kroah-Hartman
parent f3c7b95c99
commit 07c19c0ad4
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/powerpc/platforms/powernv/pci-sriov.c
View File

@ -600,12 +600,12 @@ static void pnv_pci_sriov_disable(struct pci_dev *pdev)
struct pnv_iov_data *iov;
iov = pnv_iov_get(pdev);
num_vfs = iov->num_vfs;
base_pe = iov->vf_pe_arr[0].pe_number;
if (WARN_ON(!iov))
return;
num_vfs = iov->num_vfs;
base_pe = iov->vf_pe_arr[0].pe_number;
/* Release VF PEs */
pnv_ioda_release_vf_PE(pdev);