CVE-2024-49994

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

block: fix integer overflow in BLKSECDISCARD

I independently rediscovered

commit 22d24a544b0d49bbcbd61c8c0eaf77d3c9297155

block: fix overflow in blk_ioctl_discard()

but for secure erase.

Same problem:

uint64_t r[2] = {512, 18446744073709551104ULL};

ioctl(fd, BLKSECDISCARD, r);

will enter near infinite loop inside blkdev_issue_secure_erase():

a.out: attempt to access beyond end of device

loop0: rw=5, sector=3399043073, nr_sectors = 1024 limit=2048

bio_check_eod: 3286214 callbacks suppressed