CVE-2024-53155

Summary

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

ocfs2: fix uninitialized value in ocfs2_file_read_iter()

Syzbot has reported the following KMSAN splat:

BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 ocfs2_file_read_iter+0x9a4/0xf80 __io_read+0x8d4/0x20f0 io_read+0x3e/0xf0 io_issue_sqe+0x42b/0x22c0 io_wq_submit_work+0xaf9/0xdc0 io_worker_handle_work+0xd13/0x2110 io_wq_worker+0x447/0x1410 ret_from_fork+0x6f/0x90 ret_from_fork_asm+0x1a/0x30

Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 alloc_pages_mpol_noprof+0x299/0x990 alloc_pages_noprof+0x1bf/0x1e0 allocate_slab+0x33a/0x1250 ___slab_alloc+0x12ef/0x35e0 kmem_cache_alloc_bulk_noprof+0x486/0x1330 __io_alloc_req_refill+0x84/0x560 io_submit_sqes+0x172f/0x2f30 __se_sys_io_uring_enter+0x406/0x41c0 __x64_sys_io_uring_enter+0x11f/0x1a0 x64_sys_call+0x2b54/0x3ba0 do_syscall_64+0xcd/0x1e0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Since an instance of 'struct kiocb' may be passed from the block layer with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()' and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in 'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 6c8f8d1e595dabd5389817f6d798cc8bd95c40abaffected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < f4078ef38d3163e6be47403a619558b19c4bfccdaffected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62faffected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 8c966150d5abff58c3c2bdb9a6e63fd773782905affected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 83f8713a0ef1d55d6a287bcfadcaab8245ac5098affected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 8e0de82ed18ba0e71f817adbd81317fd1032ca5aaffected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < 366c933c2ab34dd6551acc03b4872726b7605143affected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < dc78efe556fed162d48736ef24066f42e463e27caffected
LinuxLinux7cdfc3a1c3971c9125c317cb8c2525745851798e < adc77b19f62d7e80f98400b2fca9d700d2afdd6faffected
LinuxLinux2.6.22affected
LinuxLinux0 < 2.6.22unaffected
LinuxLinux4.19.325 <= 4.19.*unaffected
LinuxLinux5.4.287 <= 5.4.*unaffected
LinuxLinux5.10.231 <= 5.10.*unaffected
LinuxLinux5.15.174 <= 5.15.*unaffected
LinuxLinux6.1.120 <= 6.1.*unaffected
LinuxLinux6.6.64 <= 6.6.*unaffected
LinuxLinux6.11.11 <= 6.11.*unaffected
LinuxLinux6.12.2 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References