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[Qemu-devel] [PATCH 2/3] Fix buffer overrun in sched_getaffinity
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PATCH 2/3] Fix buffer overrun in sched_getaffinity |
Date: |
Mon, 2 May 2011 12:19:09 +0300 |
From: Mike McCormack <address@hidden>
Zeroing of the cpu array should start from &cpus[kernel_ret]
not &cpus[num_zeros_to_fill].
This fixes a crash in EFL's edje_cc running under qemu-arm.
Signed-off-by: Mike McCormack <address@hidden>
Reviewed-by: Stefan Hajnoczi <address@hidden>
Acked-by: Mike Frysinger <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/syscall.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e969d1b..5b7b8e2 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6505,7 +6505,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unsigned long zero = arg2 - ret;
p = alloca(zero);
memset(p, 0, zero);
- if (copy_to_user(arg3 + zero, p, zero)) {
+ if (copy_to_user(arg3 + ret, p, zero)) {
goto efault;
}
arg2 = ret;
--
1.7.4.1