From: Paul Durrant <pdurrant@gmail.com> To: Sergey Dyasli <sergey.dyasli@citrix.com> Cc: xen-devel@lists.xen.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Juergen Gross <jgross@suse.com>, Stefano Stabellini <sstabellini@kernel.org>, George Dunlap <george.dunlap@citrix.com>, Ross Lagerwall <ross.lagerwall@citrix.com>, Andrew Morton <akpm@linux-foundation.org>, Wei Liu <wei.liu@kernel.org> Subject: Re: [PATCH v1 4/4] xen/netback: Fix grant copy across page boundary with KASAN Date: Thu, 9 Jan 2020 13:36:22 +0000 [thread overview] Message-ID: <CACCGGhCGcdEq7CC3J0201ETvAd+PZ2fTDNUS3mo599Tuf-61yA@mail.gmail.com> (raw) In-Reply-To: <20200108152100.7630-5-sergey.dyasli@citrix.com> On Wed, 8 Jan 2020 at 15:21, Sergey Dyasli <sergey.dyasli@citrix.com> wrote: > > From: Ross Lagerwall <ross.lagerwall@citrix.com> > > When KASAN (or SLUB_DEBUG) is turned on, the normal expectation that > allocations are aligned to the next power of 2 of the size does not > hold. Therefore, handle grant copies that cross page boundaries. > > Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> > Signed-off-by: Sergey Dyasli <sergey.dyasli@citrix.com> > --- > RFC --> v1: > - Added BUILD_BUG_ON to the netback patch > - xenvif_idx_release() now located outside the loop > > CC: Wei Liu <wei.liu@kernel.org> > CC: Paul Durrant <paul@xen.org> [snip] > > +static void __init __maybe_unused build_assertions(void) > +{ > + BUILD_BUG_ON(sizeof(struct xenvif_tx_cb) > 48); FIELD_SIZEOF(struct sk_buff, cb) rather than a magic '48' I think. Paul > +} > + > MODULE_LICENSE("Dual BSD/GPL"); > MODULE_ALIAS("xen-backend:vif"); > -- > 2.17.1 >
WARNING: multiple messages have this Message-ID (diff)
From: Paul Durrant <pdurrant@gmail.com> To: Sergey Dyasli <sergey.dyasli@citrix.com> Cc: Juergen Gross <jgross@suse.com>, Wei Liu <wei.liu@kernel.org>, Stefano Stabellini <sstabellini@kernel.org>, Ross Lagerwall <ross.lagerwall@citrix.com>, George Dunlap <george.dunlap@citrix.com>, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, xen-devel@lists.xen.org, linux-mm@kvack.org, Alexander Potapenko <glider@google.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Andrew Morton <akpm@linux-foundation.org>, Dmitry Vyukov <dvyukov@google.com> Subject: Re: [Xen-devel] [PATCH v1 4/4] xen/netback: Fix grant copy across page boundary with KASAN Date: Thu, 9 Jan 2020 13:36:22 +0000 [thread overview] Message-ID: <CACCGGhCGcdEq7CC3J0201ETvAd+PZ2fTDNUS3mo599Tuf-61yA@mail.gmail.com> (raw) In-Reply-To: <20200108152100.7630-5-sergey.dyasli@citrix.com> On Wed, 8 Jan 2020 at 15:21, Sergey Dyasli <sergey.dyasli@citrix.com> wrote: > > From: Ross Lagerwall <ross.lagerwall@citrix.com> > > When KASAN (or SLUB_DEBUG) is turned on, the normal expectation that > allocations are aligned to the next power of 2 of the size does not > hold. Therefore, handle grant copies that cross page boundaries. > > Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> > Signed-off-by: Sergey Dyasli <sergey.dyasli@citrix.com> > --- > RFC --> v1: > - Added BUILD_BUG_ON to the netback patch > - xenvif_idx_release() now located outside the loop > > CC: Wei Liu <wei.liu@kernel.org> > CC: Paul Durrant <paul@xen.org> [snip] > > +static void __init __maybe_unused build_assertions(void) > +{ > + BUILD_BUG_ON(sizeof(struct xenvif_tx_cb) > 48); FIELD_SIZEOF(struct sk_buff, cb) rather than a magic '48' I think. Paul > +} > + > MODULE_LICENSE("Dual BSD/GPL"); > MODULE_ALIAS("xen-backend:vif"); > -- > 2.17.1 > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2020-01-09 13:36 UTC|newest] Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-08 15:20 [PATCH v1 0/4] basic KASAN support for Xen PV domains Sergey Dyasli 2020-01-08 15:20 ` [Xen-devel] " Sergey Dyasli 2020-01-08 15:20 ` [PATCH v1 1/4] kasan: introduce set_pmd_early_shadow() Sergey Dyasli 2020-01-08 15:20 ` [Xen-devel] " Sergey Dyasli 2020-01-10 14:41 ` kbuild test robot 2020-01-10 14:41 ` kbuild test robot 2020-01-10 14:41 ` [Xen-devel] " kbuild test robot 2020-01-11 5:21 ` kbuild test robot 2020-01-11 5:21 ` kbuild test robot 2020-01-11 5:21 ` [Xen-devel] " kbuild test robot 2020-01-15 10:54 ` Sergey Dyasli 2020-01-15 10:54 ` [Xen-devel] " Sergey Dyasli 2020-01-15 10:54 ` Sergey Dyasli 2020-01-15 11:09 ` Jürgen Groß 2020-01-15 11:09 ` [Xen-devel] " Jürgen Groß 2020-01-15 16:32 ` Sergey Dyasli 2020-01-15 16:32 ` [Xen-devel] " Sergey Dyasli 2020-01-15 16:32 ` Sergey Dyasli 2020-01-16 7:54 ` Jürgen Groß 2020-01-16 7:54 ` [Xen-devel] " Jürgen Groß 2020-01-08 15:20 ` [PATCH v1 2/4] x86/xen: add basic KASAN support for PV kernel Sergey Dyasli 2020-01-08 15:20 ` [Xen-devel] " Sergey Dyasli 2020-01-09 9:15 ` Jürgen Groß 2020-01-09 9:15 ` [Xen-devel] " Jürgen Groß 2020-01-10 11:07 ` Sergey Dyasli 2020-01-10 11:07 ` [Xen-devel] " Sergey Dyasli 2020-01-10 11:07 ` Sergey Dyasli 2020-01-09 23:27 ` Boris Ostrovsky 2020-01-09 23:27 ` [Xen-devel] " Boris Ostrovsky 2020-01-10 11:46 ` Sergey Dyasli 2020-01-10 11:46 ` [Xen-devel] " Sergey Dyasli 2020-01-10 11:46 ` Sergey Dyasli 2020-01-10 13:05 ` kbuild test robot 2020-01-10 13:05 ` kbuild test robot 2020-01-10 13:05 ` [Xen-devel] " kbuild test robot 2020-01-10 17:19 ` kbuild test robot 2020-01-10 17:19 ` kbuild test robot 2020-01-10 17:19 ` [Xen-devel] " kbuild test robot 2020-01-08 15:20 ` [PATCH v1 3/4] xen: teach KASAN about grant tables Sergey Dyasli 2020-01-08 15:20 ` [Xen-devel] " Sergey Dyasli 2020-01-08 15:21 ` [PATCH v1 4/4] xen/netback: Fix grant copy across page boundary with KASAN Sergey Dyasli 2020-01-08 15:21 ` [Xen-devel] " Sergey Dyasli 2020-01-09 10:33 ` Vlastimil Babka 2020-01-09 10:33 ` [Xen-devel] " Vlastimil Babka 2020-01-15 11:02 ` Sergey Dyasli 2020-01-15 11:02 ` [Xen-devel] " Sergey Dyasli 2020-01-15 11:02 ` Sergey Dyasli 2020-01-09 13:36 ` Paul Durrant [this message] 2020-01-09 13:36 ` [Xen-devel] " Paul Durrant 2020-01-09 13:36 ` Paul Durrant 2020-01-10 14:27 ` Sergey Dyasli 2020-01-10 14:27 ` [Xen-devel] " Sergey Dyasli 2020-01-10 14:27 ` Sergey Dyasli
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