Re: [PATCH v5 13/25] powerpc/secvar: Don't print error on ENOENT when reading variables
From: Stefan Berger <stefanb@linux.ibm.com>
Date: 2023-01-31 15:58:48
Also in:
linux-integrity, lkml
On 1/31/23 01:39, Andrew Donnellan wrote:
If attempting to read the size or data attributes of a non-existent variable (which will be possible after a later patch to expose the PLPKS via the secvar interface), don't spam the kernel log with error messages. Only print errors for return codes that aren't ENOENT. Reported-by: Sudhakar Kuppusamy <redacted> Signed-off-by: Andrew Donnellan <redacted>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
quoted hunk ↗ jump to hunk
--- v3: New patch --- arch/powerpc/kernel/secvar-sysfs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c index 9b6be63b7b36..ca3df3f7156c 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c@@ -43,8 +43,8 @@ static ssize_t size_show(struct kobject *kobj, struct kobj_attribute *attr, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error retrieving %s variable size %d\n", kobj->name, - rc); + if (rc != -ENOENT) + pr_err("Error retrieving %s variable size %d\n", kobj->name, rc); return rc; }@@ -61,7 +61,8 @@ static ssize_t data_read(struct file *filep, struct kobject *kobj, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error getting %s variable size %d\n", kobj->name, rc); + if (rc != -ENOENT) + pr_err("Error getting %s variable size %d\n", kobj->name, rc); return rc; } pr_debug("dsize is %llu\n", dsize);