CVE-2022-49318

Summary

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

f2fs: remove WARN_ON in f2fs_is_valid_blkaddr

Syzbot triggers two WARNs in f2fs_is_valid_blkaddr and __is_bitmap_valid. For example, in f2fs_is_valid_blkaddr, if type is DATA_GENERIC_ENHANCE or DATA_GENERIC_ENHANCE_READ, it invokes WARN_ON if blkaddr is not in the right range. The call trace is as follows:

f2fs_get_node_info+0x45f/0x1070 read_node_page+0x577/0x1190 __get_node_page.part.0+0x9e/0x10e0 __get_node_page f2fs_get_node_page+0x109/0x180 do_read_inode f2fs_iget+0x2a5/0x58b0 f2fs_fill_super+0x3b39/0x7ca0

Fix these two WARNs by replacing WARN_ON with dump_stack.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fdaffected
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 32bea51fe4c6e92c00403739f7547c89219bea88affected
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 99c09b298e47ebbe345a6da9f268b32a6b0f4582affected
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < cd6374af36cc548464d8c47a93fdba7303bb82a4affected
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 8c62c5e26345c34d199b4b8c8e69255ba3d0e751affected
LinuxLinux98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < dc2f78e2d4cc844a1458653d57ce1b54d4a29f21affected
LinuxLinux3.8affected
LinuxLinux0 < 3.8unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.122 <= 5.10.*unaffected
LinuxLinux5.15.47 <= 5.15.*unaffected
LinuxLinux5.17.15 <= 5.17.*unaffected
LinuxLinux5.18.4 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References