2024-04-05 10:26:58

by Edward Adam Davis

Subject: Re: [syzbot] [bluetooth?] KASAN: slab-out-of-bounds Read in l2cap_sock_setsockopt

please test oob in rfcomm_sock_setsockopt

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git fe46a7dd189e

diff --git a/net/socket.c b/net/socket.c
index e5f3af49a8b6..d5b2ab6c859c 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2327,6 +2327,9 @@ int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval,
int err, fput_needed;
struct socket *sock;

+ if (optlen < 4)
+ return -EINVAL;
+
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
return err;

2024-04-06 13:47:18

by syzbot

Subject: Re: [syzbot] [bluetooth?] KASAN: slab-out-of-bounds Read in sco_sock_setsockopt

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: [email protected]

Tested on:

commit: fe46a7dd Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=141bdfc5180000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a
dashboard link: https://syzkaller.appspot.com/bug?extid=b71011ec0a23f4d15625
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=14167ead180000

Note: testing is done by a robot and is best-effort only.