From e54a5dfb960053437f464a7ce372a8acc293fdcb Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 3 Sep 2005 15:57:27 -0700 Subject: [PATCH] uml: fix signal frame copy_user The copy_user stuff in the signal frame code was broke. Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/sys-x86_64/signal.c | 41 ++++++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 17 deletions(-) (limited to 'arch/um/sys-x86_64') diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c index 8fdaed06c10d..fe1d065332b1 100644 --- a/arch/um/sys-x86_64/signal.c +++ b/arch/um/sys-x86_64/signal.c @@ -104,28 +104,35 @@ int copy_sc_to_user_skas(struct sigcontext *to, struct _fpstate *to_fp, int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from, int fpsize) { - struct _fpstate *to_fp, *from_fp; - unsigned long sigs; - int err; - - to_fp = to->fpstate; - from_fp = from->fpstate; - sigs = to->oldmask; - err = copy_from_user(to, from, sizeof(*to)); - to->oldmask = sigs; - return(err); + struct _fpstate *to_fp, *from_fp; + unsigned long sigs; + int err; + + to_fp = to->fpstate; + sigs = to->oldmask; + err = copy_from_user(to, from, sizeof(*to)); + from_fp = to->fpstate; + to->fpstate = to_fp; + to->oldmask = sigs; + if(to_fp != NULL) + err |= copy_from_user(to_fp, from_fp, fpsize); + return(err); } int copy_sc_to_user_tt(struct sigcontext *to, struct _fpstate *fp, struct sigcontext *from, int fpsize) { - struct _fpstate *to_fp, *from_fp; - int err; - - to_fp = (fp ? fp : (struct _fpstate *) (to + 1)); - from_fp = from->fpstate; - err = copy_to_user(to, from, sizeof(*to)); - return(err); + struct _fpstate *to_fp, *from_fp; + int err; + + to_fp = (fp ? fp : (struct _fpstate *) (to + 1)); + from_fp = from->fpstate; + err = copy_to_user(to, from, sizeof(*to)); + if(from_fp != NULL){ + err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate)); + err |= copy_to_user(to_fp, from_fp, fpsize); + } + return(err); } #endif -- cgit v1.2.3-59-g8ed1b