diff options
| author | xypron.glpk@gmx.de <xypron.glpk@gmx.de> | 2017-07-14 19:12:39 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2017-07-19 14:14:41 +0200 |
| commit | 71275a3e985db60b53b381f5253fdb15c663e18e (patch) | |
| tree | 43e94e7ee118aebb999f35c592eaa8587f983215 | |
| parent | 70bfcdc6bb6f969babd69efc49e1dc7a1faeca54 (diff) | |
efi_memory: avoid NULL dereference in efi_free_pool
If efi_free_pool is called with argument NULL an illegal memory
access occurs.
So let's check the parameter on entry.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | lib/efi_loader/efi_memory.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index db2ae19f59..5c53aaafdb 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -379,6 +379,9 @@ efi_status_t efi_free_pool(void *buffer) efi_status_t r; struct efi_pool_allocation *alloc; + if (buffer == NULL) + return EFI_INVALID_PARAMETER; + alloc = container_of(buffer, struct efi_pool_allocation, data); /* Sanity check, was the supplied address returned by allocate_pool */ assert(((uintptr_t)alloc & EFI_PAGE_MASK) == 0); |