Warn when encountering EIO during remount

Instead of simply erroring out, just warn the user that a filesystem was
unable to be remounted due to EIO. This is helpful for FUSE filesystems
which might be buggy or having issues.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/firejail/fs.c b/src/firejail/fs.c
index f30e56e8d..b44eb65ee 100644
--- a/src/firejail/fs.c
+++ b/src/firejail/fs.c
@@ -530,7 +530,9 @@ static void fs_remount_simple(const char *path, OPERATION op) {
         if (fstat(fd, &s) < 0) {
                 // fstat can fail with EACCES if path is a FUSE mount,
                 // mounted without 'allow_root' or 'allow_other'
-                if (errno != EACCES)
+                // fstat can also fail with EIO if the underlying FUSE system
+                // is being buggy
+                if (errno != EACCES && errno != EIO)
                         errExit("fstat");
                 close(fd);
                 goto out;