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um: fix _FORTIFY_SOURCE=2 support for kernel modules 

When UML is compiled with _FORTIFY_SOURCE we have to export all _chk()
functions which are used in modules.  For now it's only the case for
__sprintf_chk().

Tested-by: Florian Fainelli <florian@openwrt.org>
Reported-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Vitaliy Ivanov <vitalivanov@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Weinberger 2011-07-25 17:12:47 -07:00 committed by Linus Torvalds
parent 22e9b917ab
commit f956b3e40a
1 changed files with 5 additions and 0 deletions
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5
arch/um/os-Linux/user_syms.c
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@ -113,3 +113,8 @@ EXPORT_SYMBOL(__stack_smash_handler);
extern long __guard __attribute__((weak));
EXPORT_SYMBOL(__guard);
#ifdef _FORTIFY_SOURCE
extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format);
EXPORT_SYMBOL(__sprintf_chk);
#endif