The following commit has been merged into the x86/cleanups branch of tip: Commit-ID: d2d2728d161cbc52739d823a7fb76f3ba2fb3519 Gitweb: https://git.kernel.org/tip/d2d2728d161cbc52739d823a7fb76f3ba2fb3519 Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx> AuthorDate: Sat, 15 Feb 2020 17:41:04 -05:00 Committer: Al Viro <viro@xxxxxxxxxxxxxxxxxx> CommitterDate: Wed, 18 Mar 2020 20:40:56 -04:00 x86: switch ia32_setup_sigcontext() to unsafe_put_user() Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- arch/x86/ia32/ia32_signal.c | 64 ++++++++++++++++++------------------ 1 file changed, 33 insertions(+), 31 deletions(-) diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c index 23e2c55..af673ec 100644 --- a/arch/x86/ia32/ia32_signal.c +++ b/arch/x86/ia32/ia32_signal.c @@ -158,38 +158,40 @@ static int ia32_setup_sigcontext(struct sigcontext_32 __user *sc, void __user *fpstate, struct pt_regs *regs, unsigned int mask) { - int err = 0; - - put_user_try { - put_user_ex(get_user_seg(gs), (unsigned int __user *)&sc->gs); - put_user_ex(get_user_seg(fs), (unsigned int __user *)&sc->fs); - put_user_ex(get_user_seg(ds), (unsigned int __user *)&sc->ds); - put_user_ex(get_user_seg(es), (unsigned int __user *)&sc->es); - - put_user_ex(regs->di, &sc->di); - put_user_ex(regs->si, &sc->si); - put_user_ex(regs->bp, &sc->bp); - put_user_ex(regs->sp, &sc->sp); - put_user_ex(regs->bx, &sc->bx); - put_user_ex(regs->dx, &sc->dx); - put_user_ex(regs->cx, &sc->cx); - put_user_ex(regs->ax, &sc->ax); - put_user_ex(current->thread.trap_nr, &sc->trapno); - put_user_ex(current->thread.error_code, &sc->err); - put_user_ex(regs->ip, &sc->ip); - put_user_ex(regs->cs, (unsigned int __user *)&sc->cs); - put_user_ex(regs->flags, &sc->flags); - put_user_ex(regs->sp, &sc->sp_at_signal); - put_user_ex(regs->ss, (unsigned int __user *)&sc->ss); - - put_user_ex(ptr_to_compat(fpstate), &sc->fpstate); - - /* non-iBCS2 extensions.. */ - put_user_ex(mask, &sc->oldmask); - put_user_ex(current->thread.cr2, &sc->cr2); - } put_user_catch(err); + if (!user_access_begin(sc, sizeof(struct sigcontext_32))) + return -EFAULT; - return err; + unsafe_put_user(get_user_seg(gs), (unsigned int __user *)&sc->gs, Efault); + unsafe_put_user(get_user_seg(fs), (unsigned int __user *)&sc->fs, Efault); + unsafe_put_user(get_user_seg(ds), (unsigned int __user *)&sc->ds, Efault); + unsafe_put_user(get_user_seg(es), (unsigned int __user *)&sc->es, Efault); + + unsafe_put_user(regs->di, &sc->di, Efault); + unsafe_put_user(regs->si, &sc->si, Efault); + unsafe_put_user(regs->bp, &sc->bp, Efault); + unsafe_put_user(regs->sp, &sc->sp, Efault); + unsafe_put_user(regs->bx, &sc->bx, Efault); + unsafe_put_user(regs->dx, &sc->dx, Efault); + unsafe_put_user(regs->cx, &sc->cx, Efault); + unsafe_put_user(regs->ax, &sc->ax, Efault); + unsafe_put_user(current->thread.trap_nr, &sc->trapno, Efault); + unsafe_put_user(current->thread.error_code, &sc->err, Efault); + unsafe_put_user(regs->ip, &sc->ip, Efault); + unsafe_put_user(regs->cs, (unsigned int __user *)&sc->cs, Efault); + unsafe_put_user(regs->flags, &sc->flags, Efault); + unsafe_put_user(regs->sp, &sc->sp_at_signal, Efault); + unsafe_put_user(regs->ss, (unsigned int __user *)&sc->ss, Efault); + + unsafe_put_user(ptr_to_compat(fpstate), &sc->fpstate, Efault); + + /* non-iBCS2 extensions.. */ + unsafe_put_user(mask, &sc->oldmask, Efault); + unsafe_put_user(current->thread.cr2, &sc->cr2, Efault); + user_access_end(); + return 0; +Efault: + user_access_end(); + return -EFAULT; } /*
![]() |