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Fixes an old bug of the /dev/fw* ioctl ABI.

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Merge tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull a firewire fix from Stefan Richter:
 "Fixes an old bug of the /dev/fw* ioctl ABI."

* tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: cdev: fix user memory corruption (i386 userland on amd64 kernel)
This commit is contained in:
Linus Torvalds 2012-10-11 08:52:04 +09:00
commit ba0a5a36f6
1 changed files with 2 additions and 2 deletions
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4
drivers/firewire/core-cdev.c
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@ -473,8 +473,8 @@ static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
client->bus_reset_closure = a->bus_reset_closure;
if (a->bus_reset != 0) {
fill_bus_reset_event(&bus_reset, client);
ret = copy_to_user(u64_to_uptr(a->bus_reset),
&bus_reset, sizeof(bus_reset));
/* unaligned size of bus_reset is 36 bytes */
ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36);
}
if (ret == 0 && list_empty(&client->link))
list_add_tail(&client->link, &client->device->client_list);