netdev - Re: [PATCH] bpf, x32: Fix regression caused by commit 24dea04767e6

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Message-ID: <alpine.LRH.2.21.1807281017420.16256@math.ut.ee>
Date:   Sat, 28 Jul 2018 10:23:13 +0300 (EEST)
From:   mroos@...ux.ee
To:     Wang YanQing <udknight@...il.com>
cc:     daniel@...earbox.net, ast@...nel.org, davem@...emloft.net,
        illusionist.neo@...il.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, x86@...nel.org, netdev@...r.kernel.org,
        Linux Kernel list <linux-kernel@...r.kernel.org>,
        arnd@...db.de
Subject: Re: [PATCH] bpf, x32: Fix regression caused by commit 24dea04767e6

> Commit 24dea04767e6 ("bpf, x32: remove ld_abs/ld_ind")
> removed the 4 /* Extra space for skb_copy_bits buffer */
> from _STACK_SIZE, but it didn't fix the concerned code
> in emit_prologue and emit_epilogue, and this error will
> bring very strange kernel runtime errors.
> 
> This patch fix it.

For the record:

Tested it on top of 4.18.0-rc6-00192-g864af0d40cdc on the affected
machine and it worked.

-- 
Meelis Roos (mroos@...ux.ee)