In the Linux kernel, the following vulnerability has been resolved:
quota: fix warning in dqgrab()
There's issue as follows when do fault injection: WARNING: CPU: 1 PID: 14870 at include/linux/quotaops.h:51 dquot_disable+0x13b7/0x18c0 Modules linked in: CPU: 1 PID: 14870 Comm: fsconfig Not tainted 6.3.0-next-20230505-00006-g5107a9c821af-dirty #541 RIP: 0010:dquot_disable+0x13b7/0x18c0 RSP: 0018:ffffc9000acc79e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88825e41b980 RDX: 0000000000000000 RSI: ffff88825e41b980 RDI: 0000000000000002 RBP: ffff888179f68000 R08: ffffffff82087ca7 R09: 0000000000000000 R10: 0000000000000001 R11: ffffed102f3ed026 R12: ffff888179f68130 R13: ffff888179f68110 R14: dffffc0000000000 R15: ffff888179f68118 FS: 00007f450a073740(0000) GS:ffff88882fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe96f2efd8 CR3: 000000025c8ad000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dquot_load_quota_sb+0xd53/0x1060 dquot_resume+0x172/0x230 ext4_reconfigure+0x1dc6/0x27b0 reconfigure_super+0x515/0xa90 __x64_sys_fsconfig+0xb19/0xd20 do_syscall_64+0x39/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd
Above issue may happens as follows: ProcessA ProcessB ProcessC sys_fsconfig vfs_fsconfig_locked reconfigure_super ext4_remount dquot_suspend -> suspend all type quota
sys_fsconfig vfs_fsconfig_locked reconfigure_super ext4_remount dquot_resume ret = dquot_load_quota_sb add_dquot_ref do_open -> open file O_RDWR vfs_open do_dentry_open get_write_access atomic_inc_unless_negative(&inode->i_writecount) ext4_file_open dquot_file_open dquot_initialize __dquot_initialize dqget atomic_inc(&dquot->dq_count);
__dquot_initialize __dquot_initialize dqget if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) ext4_acquire_dquot -> Return error DQ_ACTIVE_B flag isn't set dquot_disable invalidate_dquots if (atomic_read(&dquot->dq_count)) dqgrab WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) -> Trigger warning
In the above scenario, 'dquot->dq_flags' has no DQ_ACTIVE_B is normal when dqgrab(). To solve above issue just replace the dqgrab() use in invalidate_dquots() with atomic_inc(&dquot->dq_count).
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade kernel-livepatch-5.15.128-80.144Upgrade kernel-headersUpgrade kernel-livepatch-4.14.326-245.539Upgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-livepatch-5.10.192-182.736Upgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade kernelUpgrade perf | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernelUpgrade kernel-libbpf-develUpgrade kernel-livepatch-6.1.49-69.116Upgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-staticUpgrade python3-perfUpgrade python3-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade perfUpgrade bpftoolUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfo | Feb 20, 2026 | Dec 30, 2025 |
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linuxUpgrade linux-azure-fde-5.15Upgrade linux-aws-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-fipsUpgrade linux-gkeopUpgrade linux-lowlatencyUpgrade linux-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-raspiUpgrade linux-azure-fdeUpgrade linux-azureUpgrade linux-aws-fipsUpgrade linux-aws-5.4Upgrade linux-ibm-5.4Upgrade linux-awsUpgrade linux-realtimeUpgrade linux-iotUpgrade linux-ibmUpgrade linux-azure-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-raspi-5.4Upgrade linux-nvidiaUpgrade linux-azure-5.15Upgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-nvidia-tegra-igxUpgrade linux-gcp-5.15Upgrade linux-gkeUpgrade linux-hwe-5.4Upgrade linux-oracle-5.15Upgrade linux-kvmUpgrade linux-intel-iotgUpgrade linux-gcpUpgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-ibm-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-bluefieldUpgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-nvidia-tegraUpgrade linux-intel-iot-realtime | Jan 6, 2026 | Jan 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 30, 2025 |
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