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Date: Mon, 03 Dec 2007 12:57:50 +0800 From: Shi Weihua <shiwh@...fujitsu.com> To: linux-kernel@...r.kernel.org CC: tony.luck@...el.com, linux-ia64@...r.kernel.org Subject: [PATCH] IA64 signal : fix missing error checkings Not all the return value of __copy_from_user and __put_user is checked.This patch fixed it. Signed-off-by: Shi Weihua <shiwh@...fujitsu.com> --- diff -x '*.o*' -urp linux-2.6.24-rc3-git6.orig/arch/ia64/kernel/signal.c linux-2.6.24-rc3-git6/arch/ia64/kernel/signal.c --- linux-2.6.24-rc3-git6.orig/arch/ia64/kernel/signal.c 2007-12-03 12:04:22.000000000 +0800 +++ linux-2.6.24-rc3-git6/arch/ia64/kernel/signal.c 2007-12-03 12:50:15.000000000 +0800 @@ -98,7 +98,7 @@ restore_sigcontext (struct sigcontext __ if ((flags & IA64_SC_FLAG_FPH_VALID) != 0) { struct ia64_psr *psr = ia64_psr(&scr->pt); - __copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16); + err |= __copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16); psr->mfh = 0; /* drop signal handler's fph contents... */ preempt_disable(); if (psr->dfh) @@ -244,7 +244,7 @@ static long setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratch *scr) { unsigned long flags = 0, ifs, cfm, nat; - long err; + long err = 0; ifs = scr->pt.cr_ifs; @@ -257,12 +257,12 @@ setup_sigcontext (struct sigcontext __us ia64_flush_fph(current); if ((current->thread.flags & IA64_THREAD_FPH_VALID)) { flags |= IA64_SC_FLAG_FPH_VALID; - __copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16); + err = __copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16); } nat = ia64_get_scratch_nat_bits(&scr->pt, scr->scratch_unat); - err = __put_user(flags, &sc->sc_flags); + err |= __put_user(flags, &sc->sc_flags); err |= __put_user(nat, &sc->sc_nat); err |= PUT_SIGSET(mask, &sc->sc_mask); err |= __put_user(cfm, &sc->sc_cfm); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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