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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50728

s390/lcs: Fix return type of lcs_start_xmit()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: s390/lcs: Fix return type of lcs_start_xmit() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/s390/net/lcs.c:2090:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict] .ndo_start_xmit = lcs_start_xmit, ^~~~~~~~~~~~~~ drivers/s390/net/lcs.c:2097:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict] .ndo_start_xmit = lcs_start_xmit, ^~~~~~~~~~~~~~ ->ndo_start_xmit() in 'struct net_device_ops' expects a return type of 'netdev_tx_t', not 'int'. Adjust the return type of lcs_start_xmit() to match the prototype's to resolve the warning and potential CFI failure, should s390 select ARCH_SUPPORTS_CFI_CLANG in the future.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • dc1f8bf68b311b1537cb65893430b6796118498a to < 7b4da3fcd513b8e67823eb80da37aad99b3339c1affected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < d49cc2b705711fb8fb849e7c660929b2100360b7affected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < e684215d8a903752e2b0cc946517fb61e57a880aaffected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < 20022d551f2064a194d8e0acb6cd7a85094a17b2affected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < ebc3c77785dc8b5b626309c0032a38fbb139287aaffected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < 5ad774fb823c24bbeb21a15a67103ea7a6f5b928affected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < 69669820844f81a77b6db24b86581320ae4d17afaffected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < cda74cdc280ba35c8993e7517bac5c257ff36f18affected
  • dc1f8bf68b311b1537cb65893430b6796118498a to < bb16db8393658e0978c3f0d30ae069e878264fa3affected

Linux Linux

Default version status: affected

  • 2.6.32affected
  • 0 to < 2.6.32unaffected
  • 4.9.337 to ≤ 4.9.*unaffected
  • 4.14.303 to ≤ 4.14.*unaffected
  • 4.19.270 to ≤ 4.19.*unaffected
  • 5.4.229 to ≤ 5.4.*unaffected
  • 5.10.163 to ≤ 5.10.*unaffected
  • 5.15.86 to ≤ 5.15.*unaffected
  • 6.0.16 to ≤ 6.0.*unaffected
  • 6.1.2 to ≤ 6.1.*unaffected
  • 6.2 to ≤ *unaffected

References