diff options
| author | Andreas Schwab <schwab@suse.de> | 2015-03-10 17:11:35 +0100 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2015-03-22 15:18:51 +0200 |
| commit | 17644b362746c400f45b0d2b0a3ce8a52fed13fb (patch) | |
| tree | 88f8abf7a31f030b0de1a45e16988ade90ec15c0 | |
| parent | 92bed463d12ab9e1e34cdd44673ab9c4315ad1d2 (diff) | |
linux-user: fix emulation of splice syscall
The second and fourth argument are in/out parameters, store them back
after the syscall. Also, the fourth argument was mishandled, and EFAULT
handling was missing.
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/syscall.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5720195654..4bd954375e 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -9351,15 +9351,29 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, { loff_t loff_in, loff_out; loff_t *ploff_in = NULL, *ploff_out = NULL; - if(arg2) { - get_user_u64(loff_in, arg2); + if (arg2) { + if (get_user_u64(loff_in, arg2)) { + goto efault; + } ploff_in = &loff_in; } - if(arg4) { - get_user_u64(loff_out, arg2); + if (arg4) { + if (get_user_u64(loff_out, arg4)) { + goto efault; + } ploff_out = &loff_out; } ret = get_errno(splice(arg1, ploff_in, arg3, ploff_out, arg5, arg6)); + if (arg2) { + if (put_user_u64(loff_in, arg2)) { + goto efault; + } + } + if (arg4) { + if (put_user_u64(loff_out, arg4)) { + goto efault; + } + } } break; #endif |