RDMA/ucma: Limit possible option size

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commit 6a21dfc0d0 upstream.

Users of ucma are supposed to provide size of option level,
in most paths it is supposed to be equal to u8 or u16, but
it is not the case for the IB path record, where it can be
multiple of struct ib_path_rec_data.

This patch takes simplest possible approach and prevents providing
values more than possible to allocate.

Reported-by: syzbot+a38b0e9f694c379ca7ce@syzkaller.appspotmail.com
Fixes: 7ce86409ad ("RDMA/ucma: Allow user space to set service type")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Leon Romanovsky 2018-03-07 14:49:09 +02:00 • committed by Greg Kroah-Hartman

parent 7b7574e9b2

commit 9b2d784a39

1 changed files with 3 additions and 0 deletions

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drivers/infiniband/core/ucma.c

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