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Andi Kleen authored
The single caller passes a string to delta_ipc_open, which copies with a fixed size larger than the string. So it copies some random data after the original string the ro segment. If the string was at the end of a page it may fault. Just copy the string with a normal strcpy after clearing the field. Found by a LTO build (which errors out) because the compiler inlines the functions and can resolve the string sizes and triggers the compile time checks in memcpy. In function `memcpy', inlined from `delta_ipc_open.constprop' at linux/drivers/media/platform/sti/delta/delta-ipc.c:178:0, inlined from `delta_mjpeg_ipc_open' at linux/drivers/media/platform/sti/delta/delta-mjpeg-dec.c:227:0, inlined from `delta_mjpeg_decode' at linux/drivers/media/platform/sti/delta/delta-mjpeg-dec.c:403:0: /home/andi/lsrc/linux/include/linux/string.h:337:0: error: call to `__read_overflow2' declared with attribute error: detected read beyond si...
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