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 <[email protected]>
Reported-and-tested-by: [email protected]
Cc: "Radim Krčmář" <[email protected]>
Cc: [email protected]
Acked-by: Paolo Bonzini <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2019-02-28 08:57:32 -08:00

..

kvm

kvm: properly check debugfs dentry before using it

2019-02-28 08:57:32 -08:00

lib

KVM: eventfd: fix NULL deref irqbypass consumer

2017-01-12 14:42:34 +01:00

Makefile

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