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tools/thermal/tmon: Fix signed shift UB in binding display

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In the thermal zone binding display loop, the expression `(1 << j)`
performs a signed integer shift. When j reaches 31, this sets the
sign bit of a 32-bit signed integer, which is undefined behavior.

Fix it by using `(1U << j)` to perform an unsigned shift.

Signed-off-by: Liu Jing <liujing@cmss.chinamobile.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Link: https://patch.msgid.link/20260903082858.5273-1-liujing@cmss.chinamobile.com
This commit is contained in:
Liu Jing 2026-09-03 16:28:58 +08:00 committed by Daniel Lezcano
parent 05657c7822
commit f4428025c8
1 changed files with 1 additions and 1 deletions
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2
tools/thermal/tmon/tmon.c
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@ -171,7 +171,7 @@ static void prepare_logging(void)
memset(binding_str, 0, sizeof(binding_str));
for (j = 0; j < 32; j++)
binding_str[j] = (ptdata.tzi[i].cdev_binding & (1 << j)) ?
binding_str[j] = (ptdata.tzi[i].cdev_binding & (1U << j)) ?
'1' : '0';
fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",