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lib: utils: missing initialization in thead_reset_init

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If property csr-copy does not exist, fdt_getprop() will return NULL and cnt
will have a random value from the stack.

Call clone_csrs() only if cnt is initialized to a non-zero value.

Fixes: 49e422c5ad ("lib: utils: reset: Add T-HEAD sample platform reset driver")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Heinrich Schuchardt
2021-06-08 22:05:46 +02:00
committed by Anup Patel
parent 1da3d80b5b
commit 360ab88569
1 changed files with 6 additions and 4 deletions
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10
lib/utils/reset/fdt_reset_thead.c
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@@ -62,24 +62,26 @@ static int thead_reset_init(void *fdt, int nodeoff,
void *p;
const fdt64_t *val;
const fdt32_t *val_w;
int len, i, cnt;
int len, i;
u32 t, tmp = 0;
/* Prepare clone csrs */
val_w = fdt_getprop(fdt, nodeoff, "csr-copy", &len);
if (len > 0 && val_w) {
cnt = len / sizeof(fdt32_t);
int cnt;
cnt = len / sizeof(fdt32_t);
if (cnt > MAX_CUSTOM_CSR)
sbi_hart_hang();
for (i = 0; i < cnt; i++) {
custom_csr[i].index = fdt32_to_cpu(val_w[i]);
}
if (cnt)
clone_csrs(cnt);
}
if (cnt)
clone_csrs(cnt);
/* Delegate plic enable regs for S-mode */
val = fdt_getprop(fdt, nodeoff, "plic-delegate", &len);