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util/nvmutil: fix bad bound check

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the current check is too liberal. make it sticter.

the issue is that the previous check did not take
into account that it's a check on a uint16_t array,
against nf which refers to a number of bytes.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-02 17:47:58 +00:00
parent 51e4e43c94
commit 589ac92781
1 changed files with 1 additions and 1 deletions
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util/nvmutil/nvmutil.c
+1 -1
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@@ -425,7 +425,7 @@ check_bounds(int c, int p)
{ {
if ((p != 0) && (p != 1)) if ((p != 0) && (p != 1))
err(SET_ERR(EINVAL), "check_bounds: invalid partnum %d", p); err(SET_ERR(EINVAL), "check_bounds: invalid partnum %d", p);
if ((c < 0) || (c > nf)) if ((c < 0) || (c > ((nf >> 1) - 1)))
err(SET_ERR(EINVAL), "check_bounds: out of bounds %d", c); err(SET_ERR(EINVAL), "check_bounds: out of bounds %d", c);
} }