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[Qemu-devel] [PATCH 02/16] linux-user: mmap_reserve() not controlled by
From: |
Riku |
Subject: |
[Qemu-devel] [PATCH 02/16] linux-user: mmap_reserve() not controlled by RESERVED_VA |
Date: |
Fri, 3 Dec 2010 15:36:29 +0200 |
From: amateur <address@hidden>
mmap_reserve() should be called only when RESERVED_VA is enabled.
Otherwise, unmaped virtual address space will never be reusable. This
bug will exhaust virtual address space in extreme conditions.
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/mmap.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 035dfbd..abf21f6 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -697,7 +697,9 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong
old_size,
old_size, new_size,
flags | MREMAP_FIXED,
g2h(mmap_start));
- mmap_reserve(old_addr, old_size);
+ if ( RESERVED_VA ) {
+ mmap_reserve(old_addr, old_size);
+ }
}
} else {
int prot = 0;
--
1.6.5
- [Qemu-devel] [PATCH 00/16] linux-user updates, Riku, 2010/12/03
- [Qemu-devel] [PATCH 02/16] linux-user: mmap_reserve() not controlled by RESERVED_VA,
Riku <=
- [Qemu-devel] [PATCH 07/16] target-sparc: remove unused functions cpu_lock(), cpu_unlock(), Riku, 2010/12/03
- [Qemu-devel] [PATCH 08/16] ARM: linux-user: Correct size of padding in target_ucontext_v2, Riku, 2010/12/03
- [Qemu-devel] [PATCH 13/16] ARM: linux-user: Restore iWMMXT state from ucontext on sigreturn, Riku, 2010/12/03
- [Qemu-devel] [PATCH 05/16] linux-user: Translate getsockopt level option, Riku, 2010/12/03
- [Qemu-devel] [PATCH 04/16] linux-user: remove unnecessary local from __get_user(), __put_user(), Riku, 2010/12/03
- [Qemu-devel] [PATCH 14/16] linux-user: fix compiler error on nptl, Riku, 2010/12/03
- [Qemu-devel] [PATCH 03/16] linux-user: fix memory leaks with NPTL emulation, Riku, 2010/12/03
- [Qemu-devel] [PATCH 10/16] ARM: linux-user: Expose VFP registers to signal handlers, Riku, 2010/12/03
- [Qemu-devel] [PATCH 11/16] ARM: linux-user: Restore VFP state from ucontext on sigreturn, Riku, 2010/12/03
- [Qemu-devel] [PATCH 12/16] ARM: linux-user: Expose iWMMXT registers to signal handlers, Riku, 2010/12/03