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binder: fix offset calculation in debug log

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The vma start address should be substracted from the buffer's user data
address and not the other way around.

Cc: Tiffany Y. Yang <ynaffit@google.com>
Cc: stable <stable@kernel.org>
Fixes: 162c797314 ("binder: avoid user addresses in debug logs")
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Tiffany Y. Yang <ynaffit@google.com>
Link: https://lore.kernel.org/r/20250325184902.587138-1-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Carlos Llamas 2025-03-25 18:49:00 +00:00 • committed by Greg Kroah-Hartman
parent 8e55352059
commit 170d1a3738
1 changed files with 1 additions and 1 deletions
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2
drivers/android/binder.c
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@ -6373,7 +6373,7 @@ static void print_binder_transaction_ilocked(struct seq_file *m,
seq_printf(m, " node %d", buffer->target_node->debug_id);
seq_printf(m, " size %zd:%zd offset %lx\n",
buffer->data_size, buffer->offsets_size,
proc->alloc.vm_start - buffer->user_data);
buffer->user_data - proc->alloc.vm_start);
}
static void print_binder_work_ilocked(struct seq_file *m,