In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to don't set SBRDONLY in f2fshandlecriticalerror() syzbot reports a f2fs bug as below: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 58 at kernel/rcu/sync.c:177 rcusyncdtor+0xcd/0x180 kernel/rcu/sync.c:177 CPU: 1 UID: 0 PID: 58 Comm: kworker/1:2 Not tainted 6.10.0-syzkaller-12562-g1722389b0d86 #0 Workqueue: events destroysuperwork RIP: 0010:rcusyncdtor+0xcd/0x180 kernel/rcu/sync.c:177 Call Trace: percpufreerwsem+0x41/0x80 kernel/locking/percpu-rwsem.c:42 destroysuperwork+0xec/0x130 fs/super.c:282 processonework kernel/workqueue.c:3231 [inline] processscheduledworks+0xa2c/0x1830 kernel/workqueue.c:3312 workerthread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 retfromfork+0x4b/0x80 arch/x86/kernel/process.c:147 retfromforkasm+0x1a/0x30 arch/x86/entry/entry64.S:244 As Christian Brauner pointed out [1]: the root cause is f2fs sets SBRDONLY flag in internal function, rather than setting the flag covered w/ sb->sumount semaphore via remount procedure, then below race condition causes this bug: - freezesuper() - sbwaitwrite(sb, SBFREEZEWRITE) - sbwaitwrite(sb, SBFREEZEPAGEFAULT) - sbwaitwrite(sb, SBFREEZEFS) - f2fshandlecriticalerror - sb->sflags |= SBRDONLY - thawsuper - thawsuperlocked - sbrdonly() is true, so it skips sbfreezeunlock(sb, SBFREEZEFS) - deactivatelockedsuper Since f2fs has almost the same logic as ext4 [2] when handling critical error in filesystem if it mounts w/ errors=remount-ro option: - set CPERRORFLAG flag which indicates filesystem is stopped - record errors to superblock - set SBRDONLY falg Once we set CPERRORFLAG flag, all writable interfaces can detect the flag and stop any further updates on filesystem. So, it is safe to not set SB_RDONLY flag, let's remove the logic and keep in line w/ ext4 [3]. [1] https://lore.kernel.org/all/20240729-himbeeren-funknetz-96e62f9c7aee@brauner [2] https://lore.kernel.org/all/20240729132721.hxih6ehigadqf7wx@quack3 [3] https://lore.kernel.org/linux-ext4/20240805201241.27286-1-jack@suse.cz
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-18.18", "binary_name": "linux-bpf-dev" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-buildinfo-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-buildinfo-6.11.0-18-generic-64k" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-cloud-tools-6.11.0-18" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-cloud-tools-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-cloud-tools-common" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-doc" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-headers-6.11.0-18" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-headers-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-headers-6.11.0-18-generic-64k" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-6.11.0-18-generic-dbgsym" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-unsigned-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-unsigned-6.11.0-18-generic-64k" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-unsigned-6.11.0-18-generic-64k-dbgsym" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-image-unsigned-6.11.0-18-generic-dbgsym" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-lib-rust-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-libc-dev" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-6.11.0-18-generic-64k" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-extra-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-ipu6-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-ipu7-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-iwlwifi-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-usbio-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-modules-vision-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-source-6.11.0" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-tools-6.11.0-18" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-tools-6.11.0-18-generic" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-tools-6.11.0-18-generic-64k" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-tools-common" }, { "binary_version": "6.11.0-18.18", "binary_name": "linux-tools-host" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1009.10", "binary_name": "linux-aws-cloud-tools-6.11.0-1009" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-aws-headers-6.11.0-1009" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-aws-tools-6.11.0-1009" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-buildinfo-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-cloud-tools-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-headers-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-image-unsigned-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-image-unsigned-6.11.0-1009-aws-dbgsym" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-modules-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-modules-extra-6.11.0-1009-aws" }, { "binary_version": "6.11.0-1009.10", "binary_name": "linux-tools-6.11.0-1009-aws" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1009.9", "binary_name": "linux-azure-cloud-tools-6.11.0-1009" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-azure-headers-6.11.0-1009" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-azure-tools-6.11.0-1009" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-buildinfo-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-cloud-tools-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-headers-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-image-unsigned-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-image-unsigned-6.11.0-1009-azure-dbgsym" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-modules-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-modules-extra-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-modules-iwlwifi-6.11.0-1009-azure" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-tools-6.11.0-1009-azure" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1009.9", "binary_name": "linux-buildinfo-6.11.0-1009-gcp" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-gcp-headers-6.11.0-1009" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-gcp-tools-6.11.0-1009" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-headers-6.11.0-1009-gcp" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-image-unsigned-6.11.0-1009-gcp" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-image-unsigned-6.11.0-1009-gcp-dbgsym" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-modules-6.11.0-1009-gcp" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-modules-extra-6.11.0-1009-gcp" }, { "binary_version": "6.11.0-1009.9", "binary_name": "linux-tools-6.11.0-1009-gcp" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1010.11", "binary_name": "linux-buildinfo-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-buildinfo-6.11.0-1010-lowlatency-64k" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-cloud-tools-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-headers-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-headers-6.11.0-1010-lowlatency-64k" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-image-unsigned-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-image-unsigned-6.11.0-1010-lowlatency-64k" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-image-unsigned-6.11.0-1010-lowlatency-64k-dbgsym" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-image-unsigned-6.11.0-1010-lowlatency-dbgsym" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-lowlatency-cloud-tools-6.11.0-1010" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-lowlatency-headers-6.11.0-1010" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-lowlatency-lib-rust-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-lowlatency-tools-6.11.0-1010" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-modules-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-modules-6.11.0-1010-lowlatency-64k" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-modules-iwlwifi-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-tools-6.11.0-1010-lowlatency" }, { "binary_version": "6.11.0-1010.11", "binary_name": "linux-tools-6.11.0-1010-lowlatency-64k" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1011.12", "binary_name": "linux-buildinfo-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-buildinfo-6.11.0-1011-oracle-64k" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-headers-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-headers-6.11.0-1011-oracle-64k" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-image-unsigned-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-image-unsigned-6.11.0-1011-oracle-64k" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-image-unsigned-6.11.0-1011-oracle-64k-dbgsym" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-image-unsigned-6.11.0-1011-oracle-dbgsym" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-modules-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-modules-6.11.0-1011-oracle-64k" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-modules-extra-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-modules-extra-6.11.0-1011-oracle-64k" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-oracle-headers-6.11.0-1011" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-oracle-tools-6.11.0-1011" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-tools-6.11.0-1011-oracle" }, { "binary_version": "6.11.0-1011.12", "binary_name": "linux-tools-6.11.0-1011-oracle-64k" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1008.8", "binary_name": "linux-buildinfo-6.11.0-1008-raspi" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-headers-6.11.0-1008-raspi" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-image-6.11.0-1008-raspi" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-image-6.11.0-1008-raspi-dbgsym" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-modules-6.11.0-1008-raspi" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-raspi-headers-6.11.0-1008" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-raspi-tools-6.11.0-1008" }, { "binary_version": "6.11.0-1008.8", "binary_name": "linux-tools-6.11.0-1008-raspi" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-1005.5", "binary_name": "linux-buildinfo-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-cloud-tools-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-headers-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-image-unsigned-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-image-unsigned-6.11.0-1005-realtime-dbgsym" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-modules-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-modules-extra-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-modules-iwlwifi-6.11.0-1005-realtime" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-realtime-cloud-tools-6.11.0-1005" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-realtime-headers-6.11.0-1005" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-realtime-tools-6.11.0-1005" }, { "binary_version": "6.11.0-1005.5", "binary_name": "linux-tools-6.11.0-1005-realtime" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-buildinfo-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-headers-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-image-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-image-6.11.0-17-generic-dbgsym" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-modules-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-riscv-headers-6.11.0-17" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-riscv-tools-6.11.0-17" }, { "binary_version": "6.11.0-17.17.1", "binary_name": "linux-tools-6.11.0-17-generic" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-buildinfo-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-buildinfo-6.11.0-17-generic-64k" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-cloud-tools-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-headers-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-headers-6.11.0-17-generic-64k" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-hwe-6.11-cloud-tools-6.11.0-17" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-hwe-6.11-headers-6.11.0-17" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-hwe-6.11-lib-rust-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-hwe-6.11-tools-6.11.0-17" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-6.11.0-17-generic-dbgsym" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-unsigned-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-unsigned-6.11.0-17-generic-64k" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-unsigned-6.11.0-17-generic-64k-dbgsym" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-image-unsigned-6.11.0-17-generic-dbgsym" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-6.11.0-17-generic-64k" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-extra-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-ipu6-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-ipu7-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-iwlwifi-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-usbio-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-modules-vision-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-tools-6.11.0-17-generic" }, { "binary_version": "6.11.0-17.17~24.04.2", "binary_name": "linux-tools-6.11.0-17-generic-64k" } ] }