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Because this was allocated with calloc: Adjust the loop to clear unused entries as needed. Signed-off-by: Olaf Hering Reviewed-by: Juergen Gross --- tools/libs/saverestore/common.h | 2 ++ tools/libs/saverestore/save.c | 11 ++++++----- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/tools/libs/saverestore/common.h b/tools/libs/saverestore/commo= n.h index 6a2f266469..098aa39667 100644 --- a/tools/libs/saverestore/common.h +++ b/tools/libs/saverestore/common.h @@ -235,6 +235,8 @@ struct xc_sr_save_arrays { struct iovec iov[MAX_BATCH_SIZE + 4]; /* write_batch */ uint64_t rec_pfns[MAX_BATCH_SIZE]; + /* write_batch: Pointers to page data to send. Mapped gfns or local al= locations. */ + void *guest_data[MAX_BATCH_SIZE]; }; =20 struct xc_sr_restore_arrays { diff --git a/tools/libs/saverestore/save.c b/tools/libs/saverestore/save.c index ba8046b530..c4fd9a15f0 100644 --- a/tools/libs/saverestore/save.c +++ b/tools/libs/saverestore/save.c @@ -90,7 +90,7 @@ static int write_batch(struct xc_sr_context *ctx) xc_interface *xch =3D ctx->xch; xen_pfn_t *mfns =3D ctx->save.m->mfns, *types =3D ctx->save.m->types; void *guest_mapping =3D NULL; - void **guest_data =3D NULL; + void **guest_data =3D ctx->save.m->guest_data; void **local_pages =3D NULL; int *errors =3D ctx->save.m->errors, rc =3D -1; unsigned int i, p, nr_pages =3D 0, nr_pages_mapped =3D 0; @@ -105,12 +105,10 @@ static int write_batch(struct xc_sr_context *ctx) =20 assert(nr_pfns !=3D 0); =20 - /* Pointers to page data to send. Mapped gfns or local allocations. */ - guest_data =3D calloc(nr_pfns, sizeof(*guest_data)); /* Pointers to locally allocated pages. Need freeing. */ local_pages =3D calloc(nr_pfns, sizeof(*local_pages)); =20 - if ( !guest_data || !local_pages ) + if ( !local_pages ) { ERROR("Unable to allocate arrays for a batch of %u pages", nr_pfns); @@ -166,7 +164,10 @@ static int write_batch(struct xc_sr_context *ctx) for ( i =3D 0, p =3D 0; i < nr_pfns; ++i ) { if ( page_type_has_stream_data(types[i]) =3D=3D false ) + { + guest_data[i] =3D NULL; continue; + } =20 if ( errors[p] ) { @@ -183,6 +184,7 @@ static int write_batch(struct xc_sr_context *ctx) =20 if ( rc ) { + guest_data[i] =3D NULL; if ( rc =3D=3D -1 && errno =3D=3D EAGAIN ) { set_bit(ctx->save.m->batch_pfns[i], ctx->save.deferred= _pages); @@ -256,7 +258,6 @@ static int write_batch(struct xc_sr_context *ctx) for ( i =3D 0; local_pages && i < nr_pfns; ++i ) free(local_pages[i]); free(local_pages); - free(guest_data); =20 return rc; }