From: David Gibson <david@gibson.dropbear.id.au>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org,
"Daniel P. Berrangé" <berrange@redhat.com>,
qemu-ppc@nongnu.org, "Gerd Hoffmann" <kraxel@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Greg Kurz" <groug@kaod.org>,
"open list:Overall KVM CPUs" <kvm@vger.kernel.org>
Subject: Re: [PATCH 21/23] target/ppc/kvm: Avoid dynamic stack allocation
Date: Thu, 6 May 2021 12:16:29 +1000 [thread overview]
Message-ID: <YJNRfZOmH9NKB7EP@yekko> (raw)
In-Reply-To: <20210505211047.1496765-22-philmd@redhat.com>
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On Wed, May 05, 2021 at 11:10:45PM +0200, Philippe Mathieu-Daudé wrote:
> Use autofree heap allocation instead of variable-length
> array on the stack.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> target/ppc/kvm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index ae62daddf7d..90d0230eb86 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -2660,7 +2660,7 @@ int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp)
> int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns)
> {
> int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
> - uint8_t buf[bufsize];
> + g_autofree uint8_t *buf = g_malloc(bufsize);
> ssize_t rc;
>
> do {
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david@gibson.dropbear.id.au>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>,
"open list:Overall KVM CPUs" <kvm@vger.kernel.org>,
qemu-block@nongnu.org,
"Richard Henderson" <richard.henderson@linaro.org>,
qemu-devel@nongnu.org, "Greg Kurz" <groug@kaod.org>,
qemu-ppc@nongnu.org, "Gerd Hoffmann" <kraxel@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>
Subject: Re: [PATCH 21/23] target/ppc/kvm: Avoid dynamic stack allocation
Date: Thu, 6 May 2021 12:16:29 +1000 [thread overview]
Message-ID: <YJNRfZOmH9NKB7EP@yekko> (raw)
In-Reply-To: <20210505211047.1496765-22-philmd@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 1071 bytes --]
On Wed, May 05, 2021 at 11:10:45PM +0200, Philippe Mathieu-Daudé wrote:
> Use autofree heap allocation instead of variable-length
> array on the stack.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> target/ppc/kvm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index ae62daddf7d..90d0230eb86 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -2660,7 +2660,7 @@ int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp)
> int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns)
> {
> int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
> - uint8_t buf[bufsize];
> + g_autofree uint8_t *buf = g_malloc(bufsize);
> ssize_t rc;
>
> do {
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2021-05-06 2:18 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-05 21:10 [PATCH 00/23] misc: Remove variable-length arrays on the stack Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 01/23] block/vpc: Avoid dynamic stack allocation Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 02/23] chardev/baum: Replace magic values by X_MAX / Y_MAX definitions Philippe Mathieu-Daudé
2021-05-05 21:12 ` Samuel Thibault
2021-05-05 21:24 ` Marc-André Lureau
2021-05-05 21:10 ` [PATCH 03/23] chardev/baum: Use definitions to avoid dynamic stack allocation Philippe Mathieu-Daudé
2021-05-05 21:14 ` Samuel Thibault
2021-05-05 21:27 ` Marc-André Lureau
2021-05-05 21:39 ` Samuel Thibault
2021-05-05 21:10 ` [PATCH 04/23] chardev/baum: Avoid " Philippe Mathieu-Daudé
2021-05-05 21:15 ` Samuel Thibault
2021-05-05 21:29 ` Marc-André Lureau
2021-05-05 21:10 ` [PATCH 05/23] io/channel-websock: Replace strlen(const_str) by sizeof(const_str) - 1 Philippe Mathieu-Daudé
2021-05-06 8:36 ` Daniel P. Berrangé
2021-05-05 21:10 ` [PATCH 06/23] hw/block/dataplane/virtio-blk: Avoid dynamic stack allocation Philippe Mathieu-Daudé
2021-05-06 8:53 ` Stefan Hajnoczi
2021-05-06 9:01 ` Philippe Mathieu-Daudé
2021-05-06 14:47 ` Stefan Hajnoczi
2021-05-06 15:19 ` Philippe Mathieu-Daudé
2021-05-10 9:09 ` Stefan Hajnoczi
2021-05-05 21:10 ` [PATCH 07/23] hw/block/nvme: Use definition to avoid " Philippe Mathieu-Daudé
2021-05-05 21:22 ` Keith Busch
2021-05-05 22:07 ` Philippe Mathieu-Daudé
2021-05-05 23:09 ` Eric Blake
2021-05-06 0:14 ` Warner Losh
2021-05-06 2:15 ` Keith Busch
2021-05-06 6:42 ` Philippe Mathieu-Daudé
2021-05-07 16:22 ` Richard Henderson
2021-05-06 6:27 ` Klaus Jensen
2021-05-07 15:59 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 08/23] hw/block/nvme: Avoid " Philippe Mathieu-Daudé
2021-05-06 6:43 ` Klaus Jensen
2021-05-05 21:10 ` [PATCH 09/23] hw/net/e1000e_core: Use definition to avoid " Philippe Mathieu-Daudé
2021-05-06 3:35 ` Jason Wang
2021-05-07 16:29 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 10/23] hw/ppc/pnv: Avoid " Philippe Mathieu-Daudé
2021-05-06 2:12 ` David Gibson
2021-05-05 21:10 ` [PATCH 11/23] hw/intc/xics: " Philippe Mathieu-Daudé
2021-05-06 2:13 ` David Gibson
2021-05-06 8:22 ` Greg Kurz
2021-05-06 13:52 ` Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 12/23] hw/i386/multiboot: " Philippe Mathieu-Daudé
2021-05-07 16:27 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 13/23] hw/usb/hcd-xhci: " Philippe Mathieu-Daudé
2021-05-07 16:34 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 14/23] hw/usb/hcd-ohci: Use definition to avoid " Philippe Mathieu-Daudé
2021-05-07 16:39 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 15/23] net: Avoid " Philippe Mathieu-Daudé
2021-05-06 2:15 ` David Gibson
2021-05-06 7:09 ` Jason Wang
2021-05-05 21:10 ` [PATCH 16/23] ui/curses: " Philippe Mathieu-Daudé
2021-05-07 16:42 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 17/23] ui/spice-display: " Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 18/23] ui/vnc-enc-hextile: Use definitions to avoid " Philippe Mathieu-Daudé
2021-05-07 16:46 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 19/23] ui/vnc-enc-tight: Avoid " Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 20/23] util/iov: " Philippe Mathieu-Daudé
2021-05-05 21:10 ` [PATCH 21/23] target/ppc/kvm: " Philippe Mathieu-Daudé
2021-05-05 21:10 ` Philippe Mathieu-Daudé
2021-05-06 2:16 ` David Gibson [this message]
2021-05-06 2:16 ` David Gibson
2021-05-05 21:10 ` [PATCH 22/23] tests/unit/test-vmstate: " Philippe Mathieu-Daudé
2021-05-07 16:52 ` Richard Henderson
2021-05-05 21:10 ` [PATCH 23/23] configure: Prohibit variable-length allocations by using -Wvla CPPFLAG Philippe Mathieu-Daudé
2021-05-07 16:56 ` Richard Henderson
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