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integrity: check the return value of audit_log_start() 

commit 83230351c523b04ff8a029a4bdf97d881ecb96fc upstream.

audit_log_start() returns audit_buffer pointer on success or NULL on
error, so it is better to check the return value of it.

Fixes: 3323eec921 ("integrity: IMA as an integrity service provider")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiaoke Wang 2022-01-15 09:11:11 +08:00 committed by Greg Kroah-Hartman
parent 5287167109
commit ea58704f06
1 changed files with 2 additions and 0 deletions
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2
security/integrity/integrity_audit.c
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@ -36,6 +36,8 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
return;
ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
if (!ab)
return;
audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
task_pid_nr(current),
from_kuid(&init_user_ns, current_cred()->uid),