https://bugs.exim.org/show_bug.cgi?id=1659
Jeremy Harris <jgh146exb@???> changed:
What |Removed |Added
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CC| |jgh146exb@???
Status|NEW |ASSIGNED
Assignee|nigel@??? |jgh146exb@???
--- Comment #5 from Jeremy Harris <jgh146exb@???> ---
The tls_auth entry is a pseudo-command added to the list in order to facilitate
one-time checking for a tls authenticator at TLS startup (either on-connect or
STARTTLS). It is not expected in input and the code should explicitly avoid
it.
When it didn't, an access one byte preceding the buffer used for smtp input was
made. I am assuming that the buffer had been allocated at the start of a page
(testing of two systems both showed addresses ending in 0x000) _and_ that the
one system which was taking a segfault had a redzone page preceding the
allocated
area.
Adding the previously omitted check appears to eliminate the segfault.
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