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authorXiaoke Wang <xkernel.wang@foxmail.com>2022-01-15 04:11:11 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-02-16 14:56:03 +0300
commit739b7bb886b5ffa40a9492398aa04b01438e598b (patch)
tree9f7da6898ddd155895e03938ad8373e1013819db /security
parentc1d3ac0c115f8cc433768778e0551b38cd4dd292 (diff)
downloadlinux-739b7bb886b5ffa40a9492398aa04b01438e598b.tar.xz
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 <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>
Diffstat (limited to 'security')
-rw-r--r--security/integrity/integrity_audit.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/security/integrity/integrity_audit.c b/security/integrity/integrity_audit.c
index 29220056207f..0ec5e4c22cb2 100644
--- a/security/integrity/integrity_audit.c
+++ b/security/integrity/integrity_audit.c
@@ -45,6 +45,8 @@ void integrity_audit_message(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_uid()),