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In

https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/tree/misc-utils/logger.c?h=stable%2Fv2.32#n963

we see:

	size_t max_usrmsg_size = ctl->max_message_size - strlen(ctl->hdr);
	char *const buf = xmalloc(max_usrmsg_size + 2 + 2);

since ctl->max_message_size defaults to 1024, unless the -S option is used,
a very long message will result in a very large unsigned value, causing
the malloc call to fail.

User suggests pseudo patch:

-	size_t max_usrmsg_size = ctl->max_message_size - strlen(ctl->hdr);
+	size_t usrmsg_size = strlen(ctl->hdr);
+	size_t max_usrmsg_size = (ctl->max_message_size < usrmgr_size) ? usrmgr_size : ctl->max_message_size);

  Need a careful review of the code, as a few lines below there is also:

				max_usrmsg_size =
				    ctl->max_message_size - strlen(ctl->hdr);

what again might write out of bounds due to negative value as unsigned.

Fixed in the upstream tree in a little bit different way (than suggested in comment #0):

https://github.com/karelzak/util-linux/commit/2fdea5a26480d46ec9445b0ea17fc984f84eecc9
https://github.com/karelzak/util-linux/commit/b0a8b8cd9c34600dda7d0503aac2dc0af3012fdc

Please, ignore the previous comment. I have reverted the patch. The proper bugfix is: https://github.com/karelzak/util-linux/commit/58e4ee082bca100034791a4a74481f263bb30a25

Just in case the above link appears broken... https://github.com/util-linux/util-linux/commit/58e4ee082bca100034791a4a74481f263bb30a25

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (util-linux bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2100