From: Geliang Tang <geliangtang@163.com>
Date: Tue, 20 Oct 2015 07:39:01 +0000 (-0700)
Subject: pstore: add vmalloc error check
X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~11335^2~5
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=549b39a9e7ef3eee2d0895530f277c012abc7b43;p=mirror_ubuntu-focal-kernel.git

pstore: add vmalloc error check

If vmalloc fails, make write_pmsg return -ENOMEM.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

diff --git a/fs/pstore/pmsg.c b/fs/pstore/pmsg.c
index feb5dd2948b4..5a2f05a16c1e 100644
--- a/fs/pstore/pmsg.c
+++ b/fs/pstore/pmsg.c
@@ -37,6 +37,8 @@ static ssize_t write_pmsg(struct file *file, const char __user *buf,
 	if (buffer_size > PMSG_MAX_BOUNCE_BUFFER_SIZE)
 		buffer_size = PMSG_MAX_BOUNCE_BUFFER_SIZE;
 	buffer = vmalloc(buffer_size);
+	if (!buffer)
+		return -ENOMEM;
 
 	mutex_lock(&pmsg_lock);
 	for (i = 0; i < count; ) {