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FROMLIST: android: binder: Fix null ptr dereference in debug msg

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(from https://patchwork.kernel.org/patch/9990323/)

Don't access next->data in kernel debug message when the
next buffer is null.

Bug: 36007193
Change-Id: Ib8240d7e9a7087a2256e88c0ae84b9df0f2d0224
Acked-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Sherry Yang <sherryy@android.com>
This commit is contained in:
Sherry Yang
2017-10-05 17:13:47 -04:00
committed by Amit Pundir
parent 79afe6efa8
commit bcda4a7869
1 changed files with 1 additions and 1 deletions
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2
drivers/android/binder_alloc.c
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@@ -561,7 +561,7 @@ static void binder_delete_free_buffer(struct binder_alloc *alloc,
binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
"%d: merge free, buffer %pK do not share page with %pK or %pK\n",
alloc->pid, buffer->data,
prev->data, next->data);
prev->data, next ? next->data : NULL);
binder_update_page_range(alloc, 0, buffer_start_page(buffer),
buffer_start_page(buffer) + PAGE_SIZE);
}