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Commit 4458bba0 authored by Tetsuo Handa's avatar Tetsuo Handa Committed by Paul Moore
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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: default avatarTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: default avatarsyzbot <syzbot+ac488b9811036cea7ea0@syzkaller.appspotmail.com>
Signed-off-by: default avatarPaul Moore <paul@paul-moore.com>
parent 95ffe194

security/selinux/ss/policydb.c

+1 −1
Original line number Diff line number Diff line
@@ -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;