From 746a9e6ba24af2ccf03279c99d435a1b88ca5d17 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 14 Sep 2012 18:23:51 +0200 Subject: [PATCH] uprobes: Do not setup ->active_uprobe/state prematurely handle_swbp() sets utask->active_uprobe before handler_chain(), and UTASK_SSTEP before pre_ssout(). This complicates the code for no reason, arch_ hooks or consumer->handler() should not (and can't) use this info. Change handle_swbp() to initialize them after pre_ssout(), and remove the no longer needed cleanup-utask code. Signed-off-by: Oleg Nesterov cked-by: Srikar Dronamraju --- kernel/events/uprobes.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 2c1ff05af6f5..41f048c91425 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1496,22 +1496,19 @@ static void handle_swbp(struct pt_regs *regs) if (!utask) goto cleanup_ret; } - utask->active_uprobe = uprobe; + handler_chain(uprobe, regs); if (uprobe->flags & UPROBE_SKIP_SSTEP && can_skip_sstep(uprobe, regs)) goto cleanup_ret; - utask->state = UTASK_SSTEP; if (!pre_ssout(uprobe, regs, bp_vaddr)) { arch_uprobe_enable_step(&uprobe->arch); + utask->active_uprobe = uprobe; + utask->state = UTASK_SSTEP; return; } cleanup_ret: - if (utask) { - utask->active_uprobe = NULL; - utask->state = UTASK_RUNNING; - } if (!(uprobe->flags & UPROBE_SKIP_SSTEP)) /*