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authorTetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>2018-09-07 19:42:58 +0300
committerPaul Moore <paul@paul-moore.com>2018-09-13 22:36:25 +0300
commit4458bba09788e70e8fb39ad003f087cd9dfbd6ac (patch)
tree7b7cc06341a6e10d7632e578fed112c5a83c9741 /security
parent95ffe194204ae3cef88d0b59be209204bbe9b3be (diff)
downloadlinux-4458bba09788e70e8fb39ad003f087cd9dfbd6ac.tar.xz
selinux: Add __GFP_NOWARN to allocation at str_read()
syzbot is hitting warning at str_read() [1] because len parameter can become larger than KMALLOC_MAX_SIZE. We don't need to emit warning for this case. [1] https://syzkaller.appspot.com/bug?id=7f2f5aad79ea8663c296a2eedb81978401a908f0 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reported-by: syzbot <syzbot+ac488b9811036cea7ea0@syzkaller.appspotmail.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/ss/policydb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index e9394e7adc84..f4eadd3f7350 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1101,7 +1101,7 @@ static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
if ((len == 0) || (len == (u32)-1))
return -EINVAL;
- str = kmalloc(len + 1, flags);
+ str = kmalloc(len + 1, flags | __GFP_NOWARN);
if (!str)
return -ENOMEM;