On Mon, Jan 20, 2025 at 9:11 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Mon, Jan 20, 2025 at 06:46:47AM +0000, Keerthana K wrote:
> > From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
> >
> > [ Upstream commit a97de7bff13b1cc825c1b1344eaed8d6c2d3e695 ]
> >
> > syzbot reported rfcomm_sock_setsockopt_old() is copying data without
> > checking user input length.
> >
> > BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset
> > include/linux/sockptr.h:49 [inline]
> > BUG: KASAN: slab-out-of-bounds in copy_from_sockptr
> > include/linux/sockptr.h:55 [inline]
> > BUG: KASAN: slab-out-of-bounds in rfcomm_sock_setsockopt_old
> > net/bluetooth/rfcomm/sock.c:632 [inline]
> > BUG: KASAN: slab-out-of-bounds in rfcomm_sock_setsockopt+0x893/0xa70
> > net/bluetooth/rfcomm/sock.c:673
> > Read of size 4 at addr ffff8880209a8bc3 by task syz-executor632/5064
> >
> > Fixes: 9f2c8a03fbb3 ("Bluetooth: Replace RFCOMM link mode with security level")
> > Fixes: bb23c0ab8246 ("Bluetooth: Add support for deferring RFCOMM connection setup")
> > Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> > Signed-off-by: Keerthana K <keerthana.kalyanasundaram@xxxxxxxxxxxx>
> > ---
> > net/bluetooth/rfcomm/sock.c | 14 +++++---------
> > 1 file changed, 5 insertions(+), 9 deletions(-)
>
> This breaks the build on 5.15.y systems, did you test it?
>
> I'm dropping both patches now, please be more careful.
>
Apologies for the build breakage. I will be more careful in the future.
v5.15.y:
one patch is missing in v5.15.y. I have added that patch
https://lore.kernel.org/stable/20250124053306.5028-1-keerthana.kalyanasundaram@xxxxxxxxxxxx/T/#t
v5.10.y:
No changes needed. you can pick the same patch from the email chain for v5.10.y
- Keerthana K
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