On Sat, Aug 24, 2013 at 10:14:06PM +0200, Yann Droneaud wrote: > Hi, > > Following a patchset asking to change calls to get_unused_flag() [1] > to use O_CLOEXEC, Alex Williamson [2][3] decided to change VFIO > to use the flag. > > Since it's a related subsystem to KVM, using O_CLOEXEC for > file descriptors created by KVM might be applicable too. > > I'm suggesting to change calls to anon_inode_getfd() to use O_CLOEXEC > as default flag. > > This patchset should be reviewed to not break existing userspace program. > > BTW, if it's not applicable, I would suggest that new ioctls be added to > KVM subsystem, those ioctls would have a "flag" field added to their arguments. > Such "flag" would let userspace choose the open flag to use. > See for example other APIs using anon_inode_getfd() such as fanotify, > inotify, signalfd and timerfd. > > You might be interested to read: > > - Secure File Descriptor Handling (Ulrich Drepper, 2008) > http://udrepper.livejournal.com/20407.html > > - Excuse me son, but your code is leaking !!! (Dan Walsh, March 2012) > http://danwalsh.livejournal.com/53603.html > Applied, thanks. > Regards. > > [1] http://lkml.kernel.org/r/cover.1376327678.git.ydroneaud@xxxxxxxxxx > [2] http://lkml.kernel.org/r/1377186804.25163.17.camel@xxxxxxxxxxx > [3] http://lkml.kernel.org/r/20130822171744.1297.13711.stgit@xxxxxxxxxx > > Yann Droneaud (2): > kvm: use anon_inode_getfd() with O_CLOEXEC flag > ppc: kvm: use anon_inode_getfd() with O_CLOEXEC flag > > arch/powerpc/kvm/book3s_64_mmu_hv.c | 2 +- > arch/powerpc/kvm/book3s_64_vio.c | 2 +- > arch/powerpc/kvm/book3s_hv.c | 2 +- > virt/kvm/kvm_main.c | 6 +++--- > 4 files changed, 6 insertions(+), 6 deletions(-) > > -- > 1.8.3.1 -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
