diff options
| -rw-r--r-- | linux-user/syscall.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 56b413857e..4ba8880261 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -5247,6 +5247,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, grouplist = alloca(gidsetsize * sizeof(gid_t)); ret = get_errno(getgroups(gidsetsize, grouplist)); + if (gidsetsize == 0) + break; if (!is_error(ret)) { target_grouplist = lock_user(VERIFY_WRITE, arg2, gidsetsize * 2, 0); if (!target_grouplist) @@ -5397,6 +5399,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, grouplist = alloca(gidsetsize * sizeof(gid_t)); ret = get_errno(getgroups(gidsetsize, grouplist)); + if (gidsetsize == 0) + break; if (!is_error(ret)) { target_grouplist = lock_user(VERIFY_WRITE, arg2, gidsetsize * 4, 0); if (!target_grouplist) { |