When QemuLoadKernelImage() ends successfully, the command-line blob is
not freed, even though it is not used elsewhere (its content is already
copied to KernelLoadedImage->LoadOptions). The memory leak bug was
introduced in commit 7c47d89003a6 ("OvmfPkg: implement QEMU loader
library for X86 with legacy fallback", 2020-03-05).
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: James Bottomley <j...@linux.ibm.com>
Cc: Tobin Feldman-Fitzthum <to...@linux.ibm.com>
Reported-by: Laszlo Ersek <ler...@redhat.com>
Fixes: 7c47d89003a6f8f7f6f0ce8ca7d3e87c630d14cc
Signed-off-by: Dov Murik <dovmu...@linux.ibm.com>
---
OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
index 1177582ab051..6b1e7e649014 100644
--- a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
+++ b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
@@ -446,14 +446,16 @@ QemuLoadKernelImage (
}
*ImageHandle = KernelImageHandle;
- return EFI_SUCCESS;
+ Status = EFI_SUCCESS;
FreeCommandLine:
if (CommandLineSize > 0) {
FreePool (CommandLine);
}
UnloadImage:
- gBS->UnloadImage (KernelImageHandle);
+ if (EFI_ERROR (Status)) {
+ gBS->UnloadImage (KernelImageHandle);
+ }
return Status;
}
--
2.25.1
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