diff options
| author | Laurent Vivier <laurent@vivier.eu> | 2013-01-07 11:40:06 +0000 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2013-01-30 12:13:21 +0100 |
| commit | c07ecc6866f8c5eb2e0b23ba20214000310355e0 (patch) | |
| tree | a6e190166c8ca567c9c0dd8e34bd321de77f4c7c /linux-user/syscall.c | |
| parent | 1b09aeb90827c1d91383a9eae42ce8f25909857b (diff) | |
linux-user: correct reboot()
According to man reboot(2), the 4th argument is only used with
LINUX_REBOOT_CMD_RESTART2. In other cases, trying to convert
the value can generate EFAULT.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 151f4f3272..08538fc35c 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -101,6 +101,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base, #include <linux/fb.h> #include <linux/vt.h> #include <linux/dm-ioctl.h> +#include <linux/reboot.h> #include "linux_loop.h" #include "cpu-uname.h" @@ -6451,10 +6452,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; #endif case TARGET_NR_reboot: - if (!(p = lock_user_string(arg4))) - goto efault; - ret = reboot(arg1, arg2, arg3, p); - unlock_user(p, arg4, 0); + if (arg3 == LINUX_REBOOT_CMD_RESTART2) { + /* arg4 must be ignored in all other cases */ + p = lock_user_string(arg4); + if (!p) { + goto efault; + } + ret = get_errno(reboot(arg1, arg2, arg3, p)); + unlock_user(p, arg4, 0); + } else { + ret = get_errno(reboot(arg1, arg2, arg3, NULL)); + } break; #ifdef TARGET_NR_readdir case TARGET_NR_readdir: |