Unrated severityNVD Advisory· Published May 21, 2024· Updated May 21, 2025
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
CVE-2021-47254
Description
In the Linux kernel, the following vulnerability has been resolved:
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put().
On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list.
Keep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to ensure correct behavior on both sides - clear GLF_LRU after list_del under lru_lock.
Affected products
92- osv-coords89 versionspkg:rpm/suse/kernel-64kb&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default-base&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/kernel-livepatch-SLE15-SP2_Update_49&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_45&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/kernel-preempt&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_57&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 5.3.18-150300.59.164.1+ 88 more
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150200.24.194.1.150200.9.99.1
- (no CPE)range: < 5.3.18-150300.59.164.1.150300.18.96.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 1-150200.5.3.1
- (no CPE)range: < 1-150300.7.3.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 5.3.18-150300.172.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 4.12.14-16.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-122.219.1
- (no CPE)range: < 5.3.18-150200.24.194.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 4.12.14-10.188.1
- (no CPE)range: < 5.3.18-150300.59.164.1
- (no CPE)range: < 1-8.3.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
8- git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595mitre
- git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4mitre
- git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2mitre
- git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4mitre
- git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1dmitre
- git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458amitre
- git.kernel.org/stable/c/a61156314b66456ab6a291ed5deba1ebd002ab3cmitre
- git.kernel.org/stable/c/e87ef30fe73e7e10d2c85bdcc778dcec24dca553mitre
News mentions
0No linked articles in our index yet.