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CVE-2022-2874: patch 9.0.0224: Using NULL pointer when skipping compiled code · vim/vim@4875d6a

NULL Pointer Dereference in GitHub repository vim/vim prior to 9.0.0223.

CVE
#git

@@ -1165,11 +1165,14 @@ generate_loadvar(

generate_LOADV(cctx, name + 2);

break;

case dest_local:

if (lvar->lv_from_outer > 0)

generate_LOADOUTER(cctx, lvar->lv_idx, lvar->lv_from_outer,

if (cctx->ctx_skip != SKIP_YES)

{

if (lvar->lv_from_outer > 0)

generate_LOADOUTER(cctx, lvar->lv_idx, lvar->lv_from_outer,

type);

else

generate_LOAD(cctx, ISN_LOAD, lvar->lv_idx, NULL, type);

else

generate_LOAD(cctx, ISN_LOAD, lvar->lv_idx, NULL, type);

}

break;

case dest_expr:

// list or dict value should already be on the stack.

@@ -1952,6 +1955,9 @@ compile_assign_unlet(

}

}

if (cctx->ctx_skip == SKIP_YES)

return OK;

// Load the dict or list. On the stack we then have:

// - value (for assignment, not for :unlet)

// - index

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