| Message ID | 20160204092007.31588.66396.stgit@bahia.huguette.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On (Thu) 04 Feb 2016 [10:20:07], Greg Kurz wrote: > state->name does not contain a terminating '\0' and you may get: > > Machine type received is 'pseries-2.3y??' and local is 'pseries-2.4' > load of migration failed: Invalid argument > > Let's add a precision modifier to fix this. > > Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Reviewed-by: Amit Shah <amit.shah@redhat.com> Amit
On Thu, 4 Feb 2016 15:30:11 +0530 Amit Shah <amit.shah@redhat.com> wrote: > On (Thu) 04 Feb 2016 [10:20:07], Greg Kurz wrote: > > state->name does not contain a terminating '\0' and you may get: > > > > Machine type received is 'pseries-2.3y??' and local is 'pseries-2.4' > > load of migration failed: Invalid argument > > > > Let's add a precision modifier to fix this. > > > > Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> > > Reviewed-by: Amit Shah <amit.shah@redhat.com> > > Amit > I forgot to mention that this patch fixes: 61964c23e5ddd5a33f15699e45ce126f879e3e33 "migration: Add configuration section" Cc'ing stable since this is a 2.4.0 commit and it may *theorically* lead to a crash (even if that is very unlikely to occur). Also Cc'ing trivial. Thanks ! -- Greg
On 02/04/2016 02:20 AM, Greg Kurz wrote: > state->name does not contain a terminating '\0' and you may get: > > Machine type received is 'pseries-2.3y??' and local is 'pseries-2.4' > load of migration failed: Invalid argument > > Let's add a precision modifier to fix this. > > Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> > --- > migration/savevm.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/migration/savevm.c b/migration/savevm.c > index 954988d12130..3335cc23175c 100644 > --- a/migration/savevm.c > +++ b/migration/savevm.c > @@ -299,8 +299,8 @@ static int configuration_post_load(void *opaque, int version_id) > const char *current_name = MACHINE_GET_CLASS(current_machine)->name; > > if (strncmp(state->name, current_name, state->len) != 0) { > - error_report("Machine type received is '%s' and local is '%s'", > - state->name, current_name); > + error_report("Machine type received is '%.*s' and local is '%s'", > + state->len, state->name, current_name); .* required an 'int', but SaveState.len is uint32_t. There are platforms (hello, 32-bit cygwin) where uint32_t is a long, and where this would therefore cause a compiler warning. You'll be safer with an explicit cast, '(int) state->len'.
diff --git a/migration/savevm.c b/migration/savevm.c index 954988d12130..3335cc23175c 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -299,8 +299,8 @@ static int configuration_post_load(void *opaque, int version_id) const char *current_name = MACHINE_GET_CLASS(current_machine)->name; if (strncmp(state->name, current_name, state->len) != 0) { - error_report("Machine type received is '%s' and local is '%s'", - state->name, current_name); + error_report("Machine type received is '%.*s' and local is '%s'", + state->len, state->name, current_name); return -EINVAL; } return 0;
state->name does not contain a terminating '\0' and you may get: Machine type received is 'pseries-2.3y??' and local is 'pseries-2.4' load of migration failed: Invalid argument Let's add a precision modifier to fix this. Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> --- migration/savevm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)