4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tetsuo Handa penguin-kernel@i-love.sakura.ne.jp
commit 4458bba09788e70e8fb39ad003f087cd9dfbd6ac upstream.
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=7f2f5aad79ea8663c296a2eedb81978401a908f...
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- security/selinux/ss/policydb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/security/selinux/ss/policydb.c +++ b/security/selinux/ss/policydb.c @@ -1101,7 +1101,7 @@ static int str_read(char **strp, gfp_t f if ((len == 0) || (len == (u32)-1)) return -EINVAL;
- str = kmalloc(len + 1, flags); + str = kmalloc(len + 1, flags | __GFP_NOWARN); if (!str) return -ENOMEM;