Paul is sort-of correct but the 2GB limit isn't artificial as he has implied.
ClamAV code contains a lot of signed and unsigned 32bit variables that must be upgraded to 64bit variables to support larger files. Before raising the limit, a tedious audit process must be completed to ensure that all variables are upgraded in all modules. We cannot simply remove the limit and cross our fingers. Regards, Micah Micah Snyder ClamAV Development Talos Cisco Systems, Inc. ________________________________ From: clamav-users <clamav-users-boun...@lists.clamav.net> on behalf of Paul Kosinski via clamav-users <clamav-users@lists.clamav.net> Sent: Saturday, January 21, 2023 8:02 PM To: clamav-users@lists.clamav.net <clamav-users@lists.clamav.net> Cc: Paul Kosinski <clamav-us...@iment.com> Subject: Re: [clamav-users] About scanning files larger than 2 GB in size On Sun, 22 Jan 2023 05:40:18 +0900 Tsutomu Oyamada <oyam...@promark-inc.com> wrote: > How do I set up clamd? > Setting MaxFileSize to "0" is unlimited, but internally files larger than 2GB > in size cannot be scanned. > In this case, do you treat the file as clean without scanning it at all? I've complained about the 2 GiB limit now and then for several years. It's a holdover from when 32-bit numbers were all that CPUs supported, and lots of code used C's signed "int" for file size and offset. Way back in 1996, FAT32 had this limit, but even it was extended to 4 GiB (via unsigned 32-bit numbers) when Large File Support was added. These days, media files are often bigger than 2 GiB, as are some archive files (esp. disk images). Furthermore, almost all recent versions of standard OSes are 64-bit, and very few 32-bit CPUs are even being sold. In other words, the 2 GiB limit is quite an anachronism. _______________________________________________ Manage your clamav-users mailing list subscription / unsubscribe: https://lists.clamav.net/mailman/listinfo/clamav-users Help us build a comprehensive ClamAV guide: https://github.com/Cisco-Talos/clamav-documentation https://docs.clamav.net/#mailing-lists-and-chat
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