run: Only compare the lowest 32 ioctl arg bits for TIOCSTI

Closes #2782. Closes: #2783 Approved by: alexlarsson
flatpak · Mar 26, 2019 · a9107fe · a9107fe
1 parent e8e8611
commit a9107fe
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/common/flatpak-run.c b/common/flatpak-run.c
@@ -2475,7 +2475,7 @@ setup_seccomp (FlatpakBwrap *bwrap,
  {SCMP_SYS (clone), &SCMP_A0 (SCMP_CMP_MASKED_EQ, CLONE_NEWUSER, CLONE_NEWUSER)},
 
  /* Don't allow faking input to the controlling tty (CVE-2017-5226) */
- {SCMP_SYS (ioctl), &SCMP_A1 (SCMP_CMP_EQ, (int) TIOCSTI)},
+ {SCMP_SYS (ioctl), &SCMP_A1 (SCMP_CMP_MASKED_EQ, 0xFFFFFFFFu, (int) TIOCSTI)},
  };
 
  struct