kernel_optimize_test/virt/kvm
Greg Kroah-Hartman 8ed0579c12 kvm: properly check debugfs dentry before using it
debugfs can now report an error code if something went wrong instead of
just NULL.  So if the return value is to be used as a "real" dentry, it
needs to be checked if it is an error before dereferencing it.

This is now happening because of ff9fb72bc0 ("debugfs: return error
values, not NULL").  syzbot has found a way to trigger multiple debugfs
files attempting to be created, which fails, and then the error code
gets passed to dentry_path_raw() which obviously does not like it.

Reported-by: Eric Biggers <ebiggers@kernel.org>
Reported-and-tested-by: syzbot+7857962b4d45e602b8ad@syzkaller.appspotmail.com
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-02-28 08:57:32 -08:00
..
arm KVM: arm64: Relax the restriction on using stage2 PUD huge mapping 2019-02-07 11:44:47 +00:00
async_pf.c KVM: fix some typos 2018-12-21 11:28:26 +01:00
async_pf.h
coalesced_mmio.c KVM: fix unregistering coalesced mmio zone from wrong bus 2018-12-18 22:07:25 +01:00
coalesced_mmio.h
eventfd.c Miscellaneous bugfixes, plus a small patchlet related to Spectre v2. 2018-07-18 11:08:44 -07:00
irqchip.c
Kconfig KVM: arm64: Prevent KVM_COMPAT from being selected 2018-06-21 17:17:50 +01:00
kvm_main.c kvm: properly check debugfs dentry before using it 2019-02-28 08:57:32 -08:00
vfio.c
vfio.h