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

fs/adfs: validate nzones in adfs_validate_bblk()

Reject ADFS disc records with a zero zone count during boot block
validation, before the disc record is used.

When nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...)
which returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to
dm[-1], causing an out-of-bounds write before the allocated buffer.

adfs_validate_dr0() already rejects nzones != 1 for old-format
images.  Add the equivalent check to adfs_validate_bblk() for
new-format images so that a crafted image with nzones == 0 is
rejected at probe time.

Found by syzkaller.

https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159

https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2

https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6

https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e

https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc

https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277

https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de

https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/adfs/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"33aafd2418a59c96c0389d47ea09026661fa9ec6","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"1f0ed0f57f0fc87e46fe19a05435c214dc464be2","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"a11372a8b1ceaa5e950a84b3b5fbf8228f25e277","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"1586bd2d2fb436a26df20a70e78b000d34a7d159","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"60d82592ac8b5637fbed871381eb0a16df0a492e","versionType":"git","status":"affected"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","lessThan":"dd9d3e16c2d5fa166e13dce07413be51f42c8f5d","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/adfs/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","versionType":"semver","status":"unaffected"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.141","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.10","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]