CVE-2022-50313

Summary

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

erofs: fix order >= MAX_ORDER warning due to crafted negative i_size

As syzbot reported [1], the root cause is that i_size field is a signed type, and negative i_size is also less than EROFS_BLKSIZ. As a consequence, it's handled as fast symlink unexpectedly.

Let's fall back to the generic path to deal with such unusual i_size.

[1] https://lore.kernel.org/r/000000000000ac8efa05e7feaa1f@google.com

Affected Software

VendorProductVersion RangeStatus
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < 17a0cdbd7b0cf0fc0d7ca4187a67f8f1c18c291faffected
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < 0ab621fcdff1a58ff4de51a8590fa92a0ecd34beaffected
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < acc2f40b980c61a9178b72cdedd150b829064997affected
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < b6c8330f5b0f22149957a2e4977fd0f01a9db7cdaffected
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < 6235fb899b25fd287d5e42635ff82196395708ccaffected
LinuxLinux431339ba90423a038914c6032bfd71f0ba7ef2f2 < 1dd73601a1cba37a0ed5f89a8662c90191df5873affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.4.289 <= 5.4.*unaffected
LinuxLinux5.10.233 <= 5.10.*unaffected
LinuxLinux5.15.82 <= 5.15.*unaffected
LinuxLinux5.19.17 <= 5.19.*unaffected
LinuxLinux6.0.3 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

References