linux-kernel - [PATCH] alpha: fix vmalloc breakage

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: <20090107230144.GA30170@jurassic.park.msu.ru>
Date:	Thu, 8 Jan 2009 02:01:44 +0300
From:	Ivan Kokshaysky <ink@...assic.park.msu.ru>
To:	Nick Piggin <npiggin@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Richard Henderson <rth@...ddle.net>, linux-kernel@...r.kernel.org
Subject: [PATCH] alpha: fix vmalloc breakage

On alpha, we have to map some stuff in the VMALLOC space very
early in the boot process (to make SRM console callbacks work
and so on, see arch/alpha/mm/init.c). For old VM allocator,
we just manually placed a vm_struct onto the global vmlist
and this worked for ages.
Unfortunately, the new allocator isn't aware of this, so it constantly
tries to allocate the VM space which is already in use, making vmalloc
on alpha defunct.

This patch forces KVA to import vmlist entries on init.

Signed-off-by: Ivan Kokshaysky <ink@...assic.park.msu.ru>
---
 mm/vmalloc.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index c5db9a7..0dd9c2e 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -24,6 +24,7 @@
 #include <linux/rbtree.h>
 #include <linux/radix-tree.h>
 #include <linux/rcupdate.h>
+#include <linux/bootmem.h>
 
 #include <asm/atomic.h>
 #include <asm/uaccess.h>
@@ -984,6 +985,8 @@ EXPORT_SYMBOL(vm_map_ram);
 
 void __init vmalloc_init(void)
 {
+	struct vmap_area *va;
+	struct vm_struct *tmp;
 	int i;
 
 	for_each_possible_cpu(i) {
@@ -996,6 +999,16 @@ void __init vmalloc_init(void)
 		vbq->nr_dirty = 0;
 	}
 
+	/* Import existing vmlist entries. */
+	for (tmp = vmlist; tmp; tmp = tmp->next) {
+		va = alloc_bootmem(sizeof(struct vmap_area));
+		if (!va)
+			break;
+		va->flags = tmp->flags | VM_VM_AREA;
+		va->va_start = (unsigned long)tmp->addr;
+		va->va_end = va->va_start + tmp->size;
+		__insert_vmap_area(va);
+	}
 	vmap_initialized = true;
 }
 
--
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/