Messages in this thread | | | Date | Thu, 18 Dec 2014 15:12:47 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] fs: make generic_block_fiemap sig-tolerant PING2... |
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On Wed, 10 Dec 2014 16:49:18 +0300 Dmitry Monakhov <dmonakhov@openvz.org> wrote:
> > Hello. Someone please take care of this patch. > > W/o that patch unprivileged user may abuse system resources simply by spawning > wast number of unkilable busyloops (works on ext2/ext3): > > truncate --size 1T test > for ((i=0;i<1024;i++)) > do > filefrag test > /dev/null & > done > > >> --- a/fs/ioctl.c > >> +++ b/fs/ioctl.c > >> @@ -379,6 +379,11 @@ int __generic_block_fiemap(struct inode *inode, > >> past_eof = true; > >> } > >> cond_resched(); > >> + if (fatal_signal_pending(current)) { > >> + ret = -EINTR; > >> + break; > >> + } > >> + > >> } while (1); > >>
Is FIEMAP documented anywhere (manpage)? If so, that will need an update.
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