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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2024-48881

bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.

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

  • 0729029e647234fa1a94376b6edffec5c2cd75f6 to < 4379c5828492a4c2a651c8f826a01453bd2b80b0affected
  • db9439cef0b5efccf8021fe89f4953e0f901e85b to < 336e30f32ae7c043fde0f6fa21586ff30bea9fe2affected
  • 991e9c186a8ac6ab272a86e0ddc6f9733c38b867 to < fb5fee35bdd18316a84b5f30881a24e1415e1464affected
  • 68118c339c6e1e16ae017bef160dbe28a27ae9c8 to < 5202391970ffbf81975251b3526b890ba027b715affected
  • 028ddcac477b691dd9205c92f991cc15259d033e to < cc05aa2c0117e20fa25a3c0d915f98b8f2e78667affected
  • 028ddcac477b691dd9205c92f991cc15259d033e to < 5e0e913624bcd24f3de414475018d3023f060ee1affected
  • 028ddcac477b691dd9205c92f991cc15259d033e to < b2e382ae12a63560fca35050498e19e760adf8c0affected
  • fe75e8a0c20127a8dc95704f1a7ad6b82c9a0ef8affected
  • 0cabf9e164660e8d66c4810396046383a1110a69affected
  • 5.4.251 to < 5.4.287affected
  • 5.10.188 to < 5.10.231affected
  • 5.15.121 to < 5.15.174affected
  • 6.1.39 to < 6.1.120affected
  • 4.19.291 to < 4.20affected
  • 6.4.4 to < 6.5affected

Linux Linux

Default version status: affected

  • 6.5affected
  • 0 to < 6.5unaffected
  • 5.4.287 to ≤ 5.4.*unaffected
  • 5.10.231 to ≤ 5.10.*unaffected
  • 5.15.174 to ≤ 5.15.*unaffected
  • 6.1.120 to ≤ 6.1.*unaffected
  • 6.6.66 to ≤ 6.6.*unaffected
  • 6.12.5 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References