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memory-device: Fix memory pre-plug error API violations 

memory_device_get_free_addr() dereferences @errp when
memory_device_check_addable() fails.  That's wrong; see the big
comment in error.h.  Introduced in commit 1b6d6af21b "pc-dimm: factor
out capacity and slot checks into MemoryDevice".

No caller actually passes null.

Fix anyway: splice in a local Error *err, and error_propagate().

Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191204093625.14836-11-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2019-12-04 10:36:17 +01:00
parent 292743d976
commit 8574c9f1ad
1 changed files with 4 additions and 2 deletions
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6
hw/mem/memory-device.c
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@ -99,6 +99,7 @@ static uint64_t memory_device_get_free_addr(MachineState *ms,
uint64_t align, uint64_t size,
Error **errp)
{
Error *err = NULL;
GSList *list = NULL, *item;
Range as, new = range_empty;
@ -123,8 +124,9 @@ static uint64_t memory_device_get_free_addr(MachineState *ms,
return 0;
}
memory_device_check_addable(ms, size, errp);
if (*errp) {
memory_device_check_addable(ms, size, &err);
if (err) {
error_propagate(errp, err);
return 0;
}