Messages in this thread | | | Date | Wed, 16 Jun 2021 15:53:01 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH 1/2] tpm: Fix tpmrm reference counting |
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On Tue, Jun 15, 2021 at 11:14:08AM +0200, Vincent Whitchurch wrote: > The code added by commit 8979b02aaf1d6de8 ("tpm: Fix reference count to > main device") tries to take an extra reference to the main device only > for TPM2 by looking at the flags, but the flags are actually not set > at the time when tpm_chip_alloc() is called, so no extra reference is > ever taken, leading to a use-after-free if the TPM modules are removed > when the tpmrm device is in use.
Please read this
https://lore.kernel.org/linux-integrity/20210205172528.GP4718@ziepe.ca/
Jason
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