| Message ID | 20230331000756.1712787-5-titusr@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | PMBus fixes and new functions | expand |
On Fri, Mar 31, 2023 at 12:07:53AM +0000, Titus Rwantare wrote: > Devices models calling pmbus_send_string can't be relied upon to > send a non-zero pointer. This logs an error and doesn't segfault. > > Reviewed-by: Patrick Venture <venture@google.com> > Signed-off-by: Titus Rwantare <titusr@google.com> Acked-by: Corey Minyard <cminyard@mvista.com> > --- > hw/i2c/pmbus_device.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c > index bb42e410b4..18e629eaac 100644 > --- a/hw/i2c/pmbus_device.c > +++ b/hw/i2c/pmbus_device.c > @@ -94,6 +94,13 @@ void pmbus_send64(PMBusDevice *pmdev, uint64_t data) > > void pmbus_send_string(PMBusDevice *pmdev, const char *data) > { > + if (!data) { > + qemu_log_mask(LOG_GUEST_ERROR, > + "%s: %s: uninitialised read from 0x%02x\n", > + __func__, DEVICE(pmdev)->canonical_path, pmdev->code); > + return; > + } > + > size_t len = strlen(data); > g_assert(len + pmdev->out_buf_len < SMBUS_DATA_MAX_LEN); > pmdev->out_buf[len + pmdev->out_buf_len] = len; > -- > 2.40.0.423.gd6c402a77b-goog >
diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c index bb42e410b4..18e629eaac 100644 --- a/hw/i2c/pmbus_device.c +++ b/hw/i2c/pmbus_device.c @@ -94,6 +94,13 @@ void pmbus_send64(PMBusDevice *pmdev, uint64_t data) void pmbus_send_string(PMBusDevice *pmdev, const char *data) { + if (!data) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: %s: uninitialised read from 0x%02x\n", + __func__, DEVICE(pmdev)->canonical_path, pmdev->code); + return; + } + size_t len = strlen(data); g_assert(len + pmdev->out_buf_len < SMBUS_DATA_MAX_LEN); pmdev->out_buf[len + pmdev->out_buf_len] = len;