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Message-Id: <20220627161642.1.Ie7b480cd99e2c13319220cbc108caf2bcd41286b@changeid>
Date: Mon, 27 Jun 2022 16:17:00 -0700
From: Douglas Anderson <dianders@...omium.org>
To: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Douglas Anderson <dianders@...omium.org>,
Andy Gross <agross@...nel.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Stephen Boyd <sboyd@...nel.org>, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] soc: qcom: cmd-db: replace strscpy_pad() with strncpy()
Commit ac0126a01735 ("soc: qcom: cmd-db: replace strncpy() with
strscpy_pad()") breaks booting on my sc7280-herobrine-herobrine
device. From printouts I see that at bootup the function is called
with an id of "lnbclka2" which is 8 bytes big.
Previously all 8 bytes of this string were copied to the
destination. Now only 7 bytes will be copied since strscpy_pad() saves
a byte for '\0' termination.
We don't need the '\0' termination in the destination. Let's go back
to strncpy(). According to the warning:
If a caller is using non-NUL-terminated strings, strncpy() can still
be used, but destinations should be marked with the __nonstring
attribute to avoid future compiler warnings.
...so we'll do that.
Fixes: ac0126a01735 ("soc: qcom: cmd-db: replace strncpy() with strscpy_pad()")
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---
drivers/soc/qcom/cmd-db.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/qcom/cmd-db.c b/drivers/soc/qcom/cmd-db.c
index c5137c25d819..0aafe90277bc 100644
--- a/drivers/soc/qcom/cmd-db.c
+++ b/drivers/soc/qcom/cmd-db.c
@@ -141,14 +141,14 @@ static int cmd_db_get_header(const char *id, const struct entry_header **eh,
const struct rsc_hdr *rsc_hdr;
const struct entry_header *ent;
int ret, i, j;
- u8 query[8];
+ u8 query[8] __nonstring;
ret = cmd_db_ready();
if (ret)
return ret;
/* Pad out query string to same length as in DB */
- strscpy_pad(query, id, sizeof(query));
+ strncpy(query, id, sizeof(query));
for (i = 0; i < MAX_SLV_ID; i++) {
rsc_hdr = &cmd_db_header->header[i];
--
2.37.0.rc0.161.g10f37bed90-goog
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