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vfs0050: Initialize the usb transfer buffer when allocating it

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Ensure that the memory that we're going to populate via USB transfer is
initialized, otherwise valgrind may complain about (even if that's not
really an issue).
This commit is contained in:
Marco Trevisan (Treviño)
2022-09-27 23:32:57 +02:00
parent abd7c66833
commit 2718dc02e0
1 changed files with 6 additions and 3 deletions
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9
libfprint/drivers/vfs0050.c
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@@ -581,7 +581,7 @@ activate_ssm (FpiSsm *ssm, FpDevice *dev)
/* Initialize fingerprint buffer */
g_free (self->lines_buffer);
self->memory = VFS_USB_BUFFER_SIZE;
self->lines_buffer = g_malloc (self->memory);
self->lines_buffer = g_malloc0 (self->memory);
self->bytes = 0;
/* Finger is on the scanner */
@@ -589,12 +589,15 @@ activate_ssm (FpiSsm *ssm, FpDevice *dev)
}
/* Increase buffer size while it's insufficient */
while (self->bytes + VFS_USB_BUFFER_SIZE > self->memory)
while (self->memory < self->bytes + VFS_USB_BUFFER_SIZE)
{
self->memory <<= 1;
int pre_memory = self->memory;
self->memory += VFS_USB_BUFFER_SIZE;
self->lines_buffer =
(struct vfs_line *) g_realloc (self->lines_buffer,
self->memory);
memset ((guint8 *) self->lines_buffer + pre_memory, 0,
VFS_USB_BUFFER_SIZE);
}
/* Receive chunk of data */