From e9fa71bab4de31155eebb3074e29f49d6748fd1a Mon Sep 17 00:00:00 2001 From: Xiaoke Wang Date: Sat, 15 Jan 2022 09:11:11 +0800 Subject: [PATCH] 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: 3323eec921ef ("integrity: IMA as an integrity service provider") Signed-off-by: Xiaoke Wang Cc: Reviewed-by: Paul Moore Signed-off-by: Mimi Zohar Signed-off-by: Greg Kroah-Hartman --- security/integrity/integrity_audit.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/integrity/integrity_audit.c b/security/integrity/integrity_audit.c index 82c98f7d217e8..d03fbdfc972e8 100644 --- a/security/integrity/integrity_audit.c +++ b/security/integrity/integrity_audit.c @@ -39,6 +39,8 @@ 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), -- 2.47.2