Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH RFC 1/6] net: rfkill: gpio: fix gpio name buffer size off by 1 | Date | Fri, 17 Jan 2014 09:46:08 +0000 |
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From: Chen-Yu Tsai > snprintf should be passed the complete size of the buffer, including > the space for '\0'. The previous code resulted in the *_reset and > *_shutdown strings being truncated. ... > diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c ... > - snprintf(rfkill->reset_name, len + 6 , "%s_reset", rfkill->name); > - snprintf(rfkill->shutdown_name, len + 9, "%s_shutdown", rfkill->name); > + snprintf(rfkill->reset_name, len + 7 , "%s_reset", rfkill->name); > + snprintf(rfkill->shutdown_name, len + 10, "%s_shutdown", rfkill->name);
I can't find the context for the above, but they look very dubious. I'd expect: snprintf(foo, sizeof foo, ...). If you are trying to truncate rfkill->name you need to use %.*s.
David
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