[Bug 1791] New: wsprintf stack problem
Wine Bugs
wine-bugs at winehq.com
Thu Oct 23 10:46:35 CDT 2003
http://bugs.winehq.com/show_bug.cgi?id=1791
Summary: wsprintf stack problem
Product: Wine
Version: CVS
Platform: PC
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: wine-user
AssignedTo: wine-bugs at winehq.com
ReportedBy: mb at smartftp.com
This behavior can only reproduced with the SmartFTP developer build:
http://www.smartftp.com/get/SFTPDev.exe
wsprintfW("%ld", 1) produces something like "14000000" where 14000000 is a
pointer to a variable on the stack. This value is always the same for multiple
wsprintf calls in the same code part.
from the code in wsprintf.c
arg_val(buffer, INT) returns "the" pointer (14000000).
Replacing the wsprintfW function with sprintfW (msvcrt function) solves the
problem. (=> no stack corruption in SmartFTP)
My guess is that for some reason the wsprintf / arg_val function reads the
wrong values from the stack. Stack corruption could only happen within the
wsprintf function.
-Mat
SmartFTP.com
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