CVE-2024-46840 (GCVE-0-2024-46840)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:39 – Updated: 2026-01-05 10:53
VLAI?
Title
btrfs: clean up our handling of refs == 0 in snapshot delete
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: clean up our handling of refs == 0 in snapshot delete In reada we BUG_ON(refs == 0), which could be unkind since we aren't holding a lock on the extent leaf and thus could get a transient incorrect answer. In walk_down_proc we also BUG_ON(refs == 0), which could happen if we have extent tree corruption. Change that to return -EUCLEAN. In do_walk_down() we catch this case and handle it correctly, however we return -EIO, which -EUCLEAN is a more appropriate error code. Finally in walk_up_proc we have the same BUG_ON(refs == 0), so convert that to proper error handling. Also adjust the error message so we can actually do something with the information.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < c847b28a799733b04574060ab9d00f215970627d (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < 71291aa7246645ef622621934d2067400380645e (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < c60676b81fab456b672796830f6d8057058f029c (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < 728d4d045b628e006b48a448f3326a7194c88d32 (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < 9cc887ac24b7a0598f4042ae9af6b9a33072f75b (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < 7d1df13bf078ffebfedd361d714ff6cee1ff01b9 (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < 03804641ec2d0da4fa088ad21c88e703d151ce16 (git)
Affected: 2c47e605a91dde6b0514f689645e7ab336c8592a , < b8ccef048354074a548f108e51d0557d6adfd3a3 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 4.19.322 , ≤ 4.19.* (semver)
Unaffected: 5.4.284 , ≤ 5.4.* (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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