CVE-2022-49429

Summary

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

RDMA/hfi1: Prevent panic when SDMA is disabled

If the hfi1 module is loaded with HFI1_CAP_SDMA off, a call to hfi1_write_iter() will dereference a NULL pointer and panic. A typical stack frame is:

sdma_select_user_engine [hfi1] hfi1_user_sdma_process_request [hfi1] hfi1_write_iter [hfi1] do_iter_readv_writev do_iter_write vfs_writev do_writev do_syscall_64

The fix is to test for SDMA in hfi1_write_iter() and fail the I/O with EINVAL.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 33794e8e9bcb4affc0ebff9cdec85acc8b8a1762affected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 0e4dda8b3f4c07ee9ea670a10ea3171a5e63a86faffected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < e60ad83f645ee6fadd5a8057ba267aeec54f08feaffected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < cc80d3c37cec9d6ddb140483647901bc7cc6c31daffected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 32e6aea33944f364d51cd263e4cd236393a188b6affected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 29952ab85d6c3fe0b7909d9a737f10c58bf6824daffected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 22e7e400fd1a890db2ea13686324aff50e972f4faffected
LinuxLinux0cb2aa690c7ef14ad1f544288349abb5434bb75d < 629e052d0c98e46dde9f0824f0aa437f678d9b8faffected
LinuxLinux4.9affected
LinuxLinux0 < 4.9unaffected
LinuxLinux4.14.283 <= 4.14.*unaffected
LinuxLinux4.19.247 <= 4.19.*unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.121 <= 5.10.*unaffected
LinuxLinux5.15.46 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

References