3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Oleg Nesterov <o...@redhat.com> This patch is only for pre-v3.3 stable trees which backported b40a7959 "freezer: exec should clear PF_NOFREEZE along with PF_KTHREAD". v3.3+ doesn't need this fix. b40a7959 is the trivial bugfix, but unfortunately I forgot that until 34b087e4 "freezer: kill unused set_freezable_with_signal()" there were another only-for-kernel-threads flag, PF_FREEZER_NOSIG, which should be cleared as well. See https://bugs.launchpad.net/ubuntu/+source/v86d/+bug/1080530 The freezer fails because it expects that a PF_FREEZER_NOSIG task doesn't need a signal. Before b40a7959 it wrongly succeeds leaving the PF_NOFREEZE | PF_FREEZER_NOSIG task unfrozen. Reported-and-tested-by: Joseph Salisbury <joseph.salisb...@canonical.com> Signed-off-by: Oleg Nesterov <o...@redhat.com> [bwh: Don't touch PF_FORKNOEXEC; it's cleared elsewhere] Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- a/fs/exec.c +++ b/fs/exec.c @@ -1095,7 +1095,8 @@ int flush_old_exec(struct linux_binprm * bprm->mm = NULL; /* We're using it now */ set_fs(USER_DS); - current->flags &= ~(PF_RANDOMIZE | PF_KTHREAD | PF_NOFREEZE); + current->flags &= + ~(PF_RANDOMIZE | PF_KTHREAD | PF_NOFREEZE | PF_FREEZER_NOSIG); flush_thread(); current->personality &= ~bprm->per_clear; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
