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| author | Mark Rutland <mark.rutland@arm.com> | 2020-04-14 11:42:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-21 09:04:58 +0200 |
| commit | f32a339e0321cdfbe8cab7e2d9359bd6120384eb (patch) | |
| tree | 4077e103cd294a7959507a1be440d626fdc012f5 /kernel/panic.c | |
| parent | 5209e5f05bf218da317476ebea5d4d6a5319ef66 (diff) | |
arm64: vdso: don't free unallocated pages
commit 9cc3d0c6915aee5140f8335d41bbc3ff1b79aa4e upstream.
The aarch32_vdso_pages[] array never has entries allocated in the C_VVAR
or C_VDSO slots, and as the array is zero initialized these contain
NULL.
However in __aarch32_alloc_vdso_pages() when
aarch32_alloc_kuser_vdso_page() fails we attempt to free the page whose
struct page is at NULL, which is obviously nonsensical.
This patch removes the erroneous page freeing.
Fixes: 7c1deeeb0130 ("arm64: compat: VDSO setup for compat layer")
Cc: <stable@vger.kernel.org> # 5.3.x-
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/panic.c')
0 files changed, 0 insertions, 0 deletions