linux-kernel - Re: irq-disabled vs vmap vs text

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1234530311.6519.42.camel@twins>
Date:	Fri, 13 Feb 2009 14:05:11 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Nick Piggin <npiggin@...e.de>
Cc:	akpm <akpm@...ux-foundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: irq-disabled vs vmap vs text_poke

On Fri, 2009-02-13 at 14:02 +0100, Peter Zijlstra wrote:
> Agreed, I think we want to fix text_poke() and make the vmap/vunmap()
> ops yell louder at violations of these rules.

Something like so?

---
 mm/vmalloc.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 75f49d3..8516cea 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1249,6 +1249,7 @@ EXPORT_SYMBOL(vfree);
 void vunmap(const void *addr)
 {
 	BUG_ON(in_interrupt());
+	might_sleep();
 	__vunmap(addr, 0);
 }
 EXPORT_SYMBOL(vunmap);
@@ -1268,6 +1269,8 @@ void *vmap(struct page **pages, unsigned int count,
 {
 	struct vm_struct *area;
 
+	might_sleep();
+
 	if (count > num_physpages)
 		return NULL;
 

--
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/