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When adding values whose sum might overflow an unsigned integer, first
check whether the sum *would* overflow an unsigned integer and, if so,
clamp the sum at UINT_MAX.
Do the same for a multiplication.
This should fix #1134, as well as the issue in #1205.
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* amount
* anymore
* authentication
* availability
* bracket
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* nonexistent
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* occurred
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* overflow
* overwrite lower
* packet
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* programmers
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* should
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* test with
* than
* those
* unmaintained
* valid
* way
* western
* wireshark
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
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Ignore descriptors with a zero length; the only data that matters when
recalculating the on-the-wire length are the ones with data, as the goal
is to calculate the length of data that we would have gotten had neither
usbmon nor libpcap truncated the data, and if there's no data to
truncate....
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In fixup_pcap_pkthdr(), check th capture length to make sure it has a
full header before we start looking at fields in the header.
The other place that calls fix_linux_usb_mmapped_length() already
ensures that we have at least a full USB metadata header; this change
means that both places that call it do, so we can remove the check from
fix_linux_usb_mmapped_length() itself.
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[skip ci]
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When retroactively fixing up capture file on-the-network lengths for
memory-apped Linux USB captures, only fix up the on-the-network length
if it has the value that would be expected from the old capture code.
In the fixup code, make sure it's both >= the proper length, as best we
can calculate it, and the captured length.
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Correctly compute the "real" length for isochronous transfers.
When reading memory-mapped Linux capture files, fix up the "real" length
field, in case the file was written by a program doing a capture with
the bug.
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