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From: Thomas Huth <thuth@redhat.com>
To: qemu-devel@nongnu.org, Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-ppc@nongnu.org, "Daniel P. Berrangé" <berrange@redhat.com>,
	"Nicholas Piggin" <npiggin@gmail.com>,
	"Daniel Henrique Barboza" <danielhb413@gmail.com>,
	"Cédric Le Goater" <clg@kaod.org>
Subject: [PATCH 1/3] target/ppc/kvm: Replace variable length array in kvmppc_save_htab()
Date: Wed, 21 Feb 2024 17:26:34 +0100	[thread overview]
Message-ID: <20240221162636.173136-2-thuth@redhat.com> (raw)
In-Reply-To: <20240221162636.173136-1-thuth@redhat.com>

To be able to compile QEMU with -Wvla (to prevent potential security
issues), we need to get rid of the variable length array in the
kvmppc_save_htab() function. Replace it with a heap allocation instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 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 26fa9d0575..e7e39c3091 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2688,7 +2688,7 @@ 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 {
-- 
2.43.2



  reply	other threads:[~2024-02-21 16:27 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-21 16:26 [PATCH 0/3] Replace variable length arrays in ppc KVM code Thomas Huth
2024-02-21 16:26 ` Thomas Huth [this message]
2024-02-21 16:29   ` [PATCH 1/3] target/ppc/kvm: Replace variable length array in kvmppc_save_htab() Peter Maydell
2024-02-21 16:52     ` Thomas Huth
2024-02-21 16:26 ` [PATCH 2/3] target/ppc/kvm: Replace variable length array in kvmppc_read_hptes() Thomas Huth
2024-02-21 16:30   ` Peter Maydell
2024-02-21 16:26 ` [PATCH 3/3] meson: Enable -Wvla Thomas Huth
2024-02-21 16:59   ` Thomas Huth
2024-02-21 17:27     ` Philippe Mathieu-Daudé
2024-02-21 17:30       ` Philippe Mathieu-Daudé
2024-02-22  8:19       ` Clément Chigot
2024-02-21 17:48     ` Thomas Huth

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