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Fix insecure user-space pointer dereferences in sys_kernelinfo.

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This commit is contained in:
Jonas 'Sortie' Termansen 2014-01-19 18:30:07 +01:00
parent 8f8f09ac82
commit d4e7934828
1 changed files with 3 additions and 1 deletions
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4
sortix/kernelinfo.cpp
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@ -25,6 +25,7 @@
#include <brand.h>
#include <errno.h>
#include <sortix/kernel/copy.h>
#include <sortix/kernel/kernel.h>
#include <sortix/kernel/syscall.h>
@ -54,7 +55,8 @@ static ssize_t sys_kernelinfo(const char* req, char* resp, size_t resplen)
size_t stringlen = strlen(str);
if ( resplen < stringlen + 1 )
return errno = ERANGE, (ssize_t) stringlen;
strcpy(resp, str);
if ( !CopyToUser(resp, str, sizeof(char) * (stringlen + 1)) )
return -1;
return 0;
}