| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 11/92] selinux: Add __GFP_NOWARN to allocation at str_read() | Date | Thu, 29 Nov 2018 15:11:40 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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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=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> 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 @@ -1097,7 +1097,7 @@ 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;
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