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Description

In the Linux kernel, the following vulnerability has been resolved: zram: do not forget to endio for partial discard requests As reported by Qu Wenruo and Avinesh Kumar, the following getconf PAGESIZE 65536 blkdiscard -p 4k /dev/zram0 takes literally forever to complete. zram doesn't support partial discards and just returns immediately w/o doing any discard work in such cases. The problem is that we forget to endio on our way out, so blkdiscard sleeps forever in submit_bio_wait(). Fix this by jumping to end_bio label, which does bio_endio().

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-27 | Assigner Linux

Product status

Default status
unaffected

0120dd6e4e202e19a0e011e486fb2da40a5ea279 (git) before 2d1f18efccdb8b29552399d024c36b705447e975
affected

0120dd6e4e202e19a0e011e486fb2da40a5ea279 (git) before 35d3300f6357cfaa72db2721dc2b345b19bac5df
affected

0120dd6e4e202e19a0e011e486fb2da40a5ea279 (git) before a02363f71a79b755daa78a70d6b217f9c13c8c85
affected

0120dd6e4e202e19a0e011e486fb2da40a5ea279 (git) before 68ce397e8236088fc53b9532d383a722288c8194
affected

0120dd6e4e202e19a0e011e486fb2da40a5ea279 (git) before e3668b371329ea036ff022ce8ecc82f8befcf003
affected

Default status
affected

6.4
affected

Any version before 6.4
unaffected

6.6.140 (semver)
unaffected

6.12.86 (semver)
unaffected

6.18.27 (semver)
unaffected

7.0.4 (semver)
unaffected

7.1-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/2d1f18efccdb8b29552399d024c36b705447e975

git.kernel.org/...c/35d3300f6357cfaa72db2721dc2b345b19bac5df

git.kernel.org/...c/a02363f71a79b755daa78a70d6b217f9c13c8c85

git.kernel.org/...c/68ce397e8236088fc53b9532d383a722288c8194

git.kernel.org/...c/e3668b371329ea036ff022ce8ecc82f8befcf003

cve.org (CVE-2026-46089)

nvd.nist.gov (CVE-2026-46089)

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