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Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 8c665705c6a..ac3fb9ed8ee 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1619,6 +1619,7 @@ compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp
char *bits;
long timeout;
int size, max_fdset, ret = -EINVAL;
+ struct fdtable *fdt;
timeout = MAX_SCHEDULE_TIMEOUT;
if (tvp) {
@@ -1644,7 +1645,10 @@ compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp
goto out_nofds;
/* max_fdset can increase, so grab it once to avoid race */
- max_fdset = current->files->max_fdset;
+ rcu_read_lock();
+ fdt = files_fdtable(current->files);
+ max_fdset = fdt->max_fdset;
+ rcu_read_unlock();
if (n > max_fdset)
n = max_fdset;