FreeBSD Bugzilla – Attachment 237251 Details for
Bug 266113
kvm_close tries to munmap NULL memory
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[patch]
Fix v2
0001-kvm_close-3-Check-kd-sparse_map-NULL-before-munmap.patch (text/plain), 729 bytes, created by
Ashish SHUKLA
on 2022-10-13 04:07:09 UTC
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Description:
Fix v2
Filename:
MIME Type:
Creator:
Ashish SHUKLA
Created:
2022-10-13 04:07:09 UTC
Size:
729 bytes
patch
obsolete
>From b4cf805743c82420ec528efba52341e5291872cd Mon Sep 17 00:00:00 2001 >From: Ashish SHUKLA <ashish@FreeBSD.org> >Date: Tue, 30 Aug 2022 08:18:51 +0000 >Subject: [PATCH] kvm_close(3): Check kd->sparse_map != NULL before munmap > >--- > lib/libkvm/kvm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >diff --git a/lib/libkvm/kvm.c b/lib/libkvm/kvm.c >index b98f2f25e619..4b886171a7d6 100644 >--- a/lib/libkvm/kvm.c >+++ b/lib/libkvm/kvm.c >@@ -303,7 +303,7 @@ kvm_close(kvm_t *kd) > free(kd->pt_map); > if (kd->page_map != NULL) > free(kd->page_map); >- if (kd->sparse_map != MAP_FAILED) >+ if (kd->sparse_map != MAP_FAILED && kd->sparse_map != NULL) > munmap(kd->sparse_map, kd->pt_sparse_size); > free((void *)kd); > >-- >2.38.0 >
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