linux-kernel - [PATCH] vmalloc_32 should use GFP

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 for Android: free password hash cracker in your pocket

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

Message-Id: <1184739934.25235.220.camel@localhost.localdomain>
Date:	Wed, 18 Jul 2007 16:25:34 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linux Kernel list <linux-kernel@...r.kernel.org>
Cc:	linux-mm@...ck.org, Dave Airlie <airlied@...il.com>,
	Andrew Morton <akpm@...l.org>
Subject: [PATCH] vmalloc_32 should use GFP_KERNEL

I've noticed lots of failures of vmalloc_32 on machines where it
shouldn't have failed unless it was doing an atomic operation.

Looking closely, I noticed that:

#if defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA32)
#define GFP_VMALLOC32 GFP_DMA32
#elif defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA)
#define GFP_VMALLOC32 GFP_DMA
#else
#define GFP_VMALLOC32 GFP_KERNEL
#endif

Which seems to be incorrect, it should always -or- in the DMA flags
on top of GFP_KERNEL, thus this patch.

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---

This fixes frequent errors launchin X with the nouveau DRM for example.

Index: linux-work/mm/vmalloc.c
===================================================================
--- linux-work.orig/mm/vmalloc.c	2007-07-18 16:22:00.000000000 +1000
+++ linux-work/mm/vmalloc.c	2007-07-18 16:22:11.000000000 +1000
@@ -578,9 +578,9 @@ void *vmalloc_exec(unsigned long size)
 }
 
 #if defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA32)
-#define GFP_VMALLOC32 GFP_DMA32
+#define GFP_VMALLOC32 GFP_DMA32 | GFP_KERNEL
 #elif defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA)
-#define GFP_VMALLOC32 GFP_DMA
+#define GFP_VMALLOC32 GFP_DMA | GFP_KERNEL
 #else
 #define GFP_VMALLOC32 GFP_KERNEL
 #endif


-
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/