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evm: Don't return an error in evm_write_xattrs() if audit is not enabled 

This patch avoids that evm_write_xattrs() returns an error when audit is
not enabled. The ab variable can be NULL and still be passed to the other
audit_log_() functions, as those functions do not include any instruction.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Roberto Sassu 2021-05-28 09:38:12 +02:00 committed by Mimi Zohar
parent 88016de3ab
commit d721c15fd5
1 changed files with 1 additions and 1 deletions
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security/integrity/evm/evm_secfs.c
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@ -197,7 +197,7 @@ static ssize_t evm_write_xattrs(struct file *file, const char __user *buf,
ab = audit_log_start(audit_context(), GFP_KERNEL, ab = audit_log_start(audit_context(), GFP_KERNEL,
AUDIT_INTEGRITY_EVM_XATTR); AUDIT_INTEGRITY_EVM_XATTR);
if (!ab) if (!ab && IS_ENABLED(CONFIG_AUDIT))
return -ENOMEM; return -ENOMEM;
xattr = kmalloc(sizeof(struct xattr_list), GFP_KERNEL); xattr = kmalloc(sizeof(struct xattr_list), GFP_KERNEL);