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Change History

In the Linux kernel, the following vulnerability has been resolved:

tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()

tpm2_read_public() calls tpm_buf_init() but fails to call
tpm_buf_destroy() on two exit paths, leaking a page allocation:

1. When name_size() returns an error (unrecognized hash algorithm),
   the function returns directly without destroying the buffer.

2. On the success path, the buffer is never destroyed before
   returning.

All other error paths in the function correctly call
tpm_buf_destroy() before returning.

Fix both by adding the missing tpm_buf_destroy() calls.

https://git.kernel.org/stable/c/2f434be87e256fd58254f60ddf5d7d58e775ca0b

https://git.kernel.org/stable/c/f0f75a3d98b7959a8677b6363e23190f3018636b

https://git.kernel.org/stable/c/f8775d9d9062da662cc861f9ff7722a65896d4cd