tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs

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>

authored by

Chenghai Huang and committed by
Herbert Xu f0cafb02 64b9642f

+1
+1
drivers/crypto/hisilicon/debugfs.c
··· 888 888 dfx_regs_uninit(qm, qm->debug.qm_diff_regs, ARRAY_SIZE(qm_diff_regs)); 889 889 ret = PTR_ERR(qm->debug.acc_diff_regs); 890 890 qm->debug.acc_diff_regs = NULL; 891 + qm->debug.qm_diff_regs = NULL; 891 892 return ret; 892 893 } 893 894