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[Qemu-devel] [PATCH v2 1/3] nvram: at24c: prevent segfault by checking "
From: |
Wolfram Sang |
Subject: |
[Qemu-devel] [PATCH v2 1/3] nvram: at24c: prevent segfault by checking "rom-size" |
Date: |
Mon, 19 Mar 2018 22:30:59 +0100 |
The value for "rom-size" is used as a divisor, so it must not be 0 or it
will segfault. A size of 0 wouldn't make sense anyhow.
Signed-off-by: Wolfram Sang <address@hidden>
---
hw/nvram/eeprom_at24c.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c
index 22183f5360..ccf78b25e4 100644
--- a/hw/nvram/eeprom_at24c.c
+++ b/hw/nvram/eeprom_at24c.c
@@ -121,6 +121,11 @@ int at24c_eeprom_init(I2CSlave *i2c)
{
EEPROMState *ee = AT24C_EE(i2c);
+ if (!ee->rsize) {
+ ERR("rom-size not allowed to be 0\n");
+ exit(1);
+ }
+
ee->mem = g_malloc0(ee->rsize);
if (ee->blk) {
--
2.11.0