Message ID | 1459250451-29984-1-git-send-email-marcandre.lureau@redhat.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
On 29/03/2016 13:20, marcandre.lureau@redhat.com wrote: > From: Marc-André Lureau <marcandre.lureau@redhat.com> > > Since f1060c55bf1377b4, the pointer is directly passed to > qemu_ram_free(). However, on initialization failure, it may be called > with a NULL pointer. Return immediately in this case. > > This fixes a SEGV when memory initialization failed, for example > permission denied on open backing store /dev/hugepages, with -object > memory-backend-file,mem-path=/dev/hugepages. > > Program received signal SIGSEGV, Segmentation fault. > 0x00005555556e67e7 in qemu_ram_free (block=0x0) at /home/elmarco/src/qemu/exec.c:1775 > > Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Looks good, thanks! I'll push it during hard freeze. Paolo
diff --git a/exec.c b/exec.c index f398d21..965f3b2 100644 --- a/exec.c +++ b/exec.c @@ -1771,6 +1771,10 @@ static void reclaim_ramblock(RAMBlock *block) void qemu_ram_free(RAMBlock *block) { + if (!block) { + return; + } + qemu_mutex_lock_ramlist(); QLIST_REMOVE_RCU(block, next); ram_list.mru_block = NULL;