6.1-stable review patch. If anyone has any objections, please let me know.
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From: Chenghai Huang huangchenghai2@huawei.com
[ Upstream commit f0cafb02de883b3b413d34eb079c9680782a9cc1 ]
When the initialization of qm->debug.acc_diff_reg fails, the probe process does not exit. However, after qm->debug.qm_diff_regs is freed, it is not set to NULL. This can lead to a double free when the remove process attempts to free it again. Therefore, qm->debug.qm_diff_regs should be set to NULL after it is freed.
Fixes: 8be091338971 ("crypto: hisilicon/debugfs - Fix debugfs uninit process issue") Signed-off-by: Chenghai Huang huangchenghai2@huawei.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/hisilicon/debugfs.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/crypto/hisilicon/debugfs.c b/drivers/crypto/hisilicon/debugfs.c index a1d41ee39816b..cb27a44671ca1 100644 --- a/drivers/crypto/hisilicon/debugfs.c +++ b/drivers/crypto/hisilicon/debugfs.c @@ -815,6 +815,7 @@ static int qm_diff_regs_init(struct hisi_qm *qm, dfx_regs_uninit(qm, qm->debug.qm_diff_regs, ARRAY_SIZE(qm_diff_regs)); ret = PTR_ERR(qm->debug.acc_diff_regs); qm->debug.acc_diff_regs = NULL; + qm->debug.qm_diff_regs = NULL; return ret; }