From: Rakesh Babu Saladi <rsaladi2@marvell.com> mainline inclusion from mainline-v5.15 commit c2d4c543f74c90f883e8ec62a31973ae8807d354 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RDAK CVE: CVE-2021-47484 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- This patch fixes possible null pointer dereference in file "rvu_debugfs.c" Fixes: 8756828a8148 ("octeontx2-af: Add NPA aura and pool contexts to debugfs") Signed-off-by: Rakesh Babu Saladi <rsaladi2@marvell.com> Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com> Signed-off-by: Sunil Goutham <sgoutham@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net> Conflicts: drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c [File introduced in 5.11] Signed-off-by: Guo Mengqi <guomengqi3@huawei.com> --- drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c index 5205796859f6..24ebcf3d0c9c 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c @@ -438,7 +438,7 @@ static ssize_t rvu_dbg_qsize_write(struct file *filp, if (cmd_buf) ret = -EINVAL; - if (!strncmp(subtoken, "help", 4) || ret < 0) { + if (ret < 0 || !strncmp(subtoken, "help", 4)) { dev_info(rvu->dev, "Use echo <%s-lf > qsize\n", blk_string); goto qsize_write_done; } -- 2.17.1