[PATCH v2] bpf: core: fix shift-out-of-bounds in ___bpf_prog_run

Greg KH gregkh at linuxfoundation.org
Tue Jun 1 15:43:24 UTC 2021

On Tue, Jun 01, 2021 at 04:33:09PM +0200, Kurt Manucredo wrote:
> Fix shift-out-of-bounds in ___bpf_prog_run().

How is this "fixed"?

> UBSAN: shift-out-of-bounds in kernel/bpf/core.c:1414:2
> shift exponent 248 is too large for 32-bit type 'unsigned int'

What is this from?

Any reason you didn't cc: the bpf maintainers and developers?

> Reported-by: syzbot+bed360704c521841c85d at syzkaller.appspotmail.com

Does this pass the syzbot testing?


greg k-h

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