mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 22:54:01 +00:00
Code Issues Releases Wiki Activity

x86,kprobes: WARN if kprobes tries to handle a fault

Browse source 
With the removal of kprobe::handle_fault there is no reason left that
kprobe_page_fault() would ever return true on x86, make sure it
doesn't happen by accident.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20210525073213.660594073@infradead.org
This commit is contained in:
Peter Zijlstra 2021-05-25 09:25:20 +02:00
parent ec6aba3d2b
commit 00afe83098
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/x86/mm/fault.c
View file

@ -1186,7 +1186,7 @@ do_kern_addr_fault(struct pt_regs *regs, unsigned long hw_error_code,
return;
/* kprobes don't want to hook the spurious faults: */
if (kprobe_page_fault(regs, X86_TRAP_PF))
if (WARN_ON_ONCE(kprobe_page_fault(regs, X86_TRAP_PF)))
return;
/*
@ -1239,7 +1239,7 @@ void do_user_addr_fault(struct pt_regs *regs,
}
/* kprobes don't want to hook the spurious faults: */
if (unlikely(kprobe_page_fault(regs, X86_TRAP_PF)))
if (WARN_ON_ONCE(kprobe_page_fault(regs, X86_TRAP_PF)))
return;
/*