CVE-2024-42232 — libceph: fix race between delayed_work() and ceph_monc_stop()

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

libceph: fix race between delayed_work() and ceph_monc_stop()

The way the delayed work is handled in ceph_monc_stop() is prone to races with mon_fault() and possibly also finish_hunting(). Both of these can requeue the delayed work which wouldn't be canceled by any of the following code in case that happens after cancel_delayed_work_sync() runs -- __close_session() doesn't mess with the delayed work in order to avoid interfering with the hunting interval logic. This part was missed in commit b5d91704f53e ("libceph: behave in mon_fault() if cur_mon < 0") and use-after-free can still ensue on monc and objects that hang off of it, with monc->auth and monc->monmap being particularly susceptible to quickly being reused.

To fix this:

- clear monc->cur_mon and monc->hunting as part of closing the session in ceph_monc_stop() - bail from delayed_work() if monc->cur_mon is cleared, similar to how it's done in mon_fault() and finish_hunting() (based on monc->hunting) - call cancel_delayed_work_sync() after the session is closed

USN-7003-1 — linux, linux-aws, linux-azure, linux-bluefield, linux-gcp, linux-gkeop, linux-ibm, linux-kvm, linux-oracle vulnerabilit…

Affected: Ubuntu:20.04:LTS: linux, Ubuntu:20.04:LTS: linux-aws, Ubuntu:20.04:LTS: linux-azure, Ubuntu:20.04:LTS: linux-bluefield, Ubuntu:20.04:LTS: linux-gcp, Ubuntu:20.04:LTS: linux-gkeop, Ubuntu:20.04:LTS: linux-ibm, Ubuntu:20.04:LTS: linux-kvm, Ubuntu:20.04:LTS: linux-oracle

It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service (system crash). (CVE-2024-40902)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - MIPS architecture; - PowerPC architecture; - x86 architecture; - ACPI drivers; - Serial ATA and Parallel ATA drivers; - Drivers core; - GPIO subsystem; - GPU drivers; - Greybus drivers; - HID subsystem; - I2C subsystem; - IIO subsystem; - InfiniBand drivers; - Media drivers; - VMware VMCI Driver; - Network drivers; - Pin controllers subsystem; - S/390 drivers; - SCSI drivers; - USB subsystem; - JFFS2 file system; - JFS file system; - File systems infrastructure; - NILFS2 file system; - IOMMU subsystem; - Sun RPC protocol; - Netfilter; - Memory management; - B.A.T.M.A.N. meshing protocol; - CAN network layer; - Ceph Core library; - Networking core; - IPv4 networking; - IPv6 networking; - IUCV driver; - MAC80211 subsystem; - NET/ROM layer; - Network traffic control; - SoC Audio for Freescale CPUs drivers; (CVE-2024-40905, CVE-2024-41095, CVE-2024-41035, CVE-2024-36974, CVE-2024-40959, CVE-2024-40978, CVE-2024-42236, CVE-2024-40963, CVE-2024-40916, CVE-2024-41006, CVE-2024-39495, CVE-2023-52803, CVE-2024…

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CVE-2024-42232 — libceph: fix race between delayed_work() and ceph_monc_stop()

USN-7003-1 — linux, linux-aws, linux-azure, linux-bluefield, linux-gcp, linux-gkeop, linux-ibm, linux-kvm, linux-oracle vulnerabilit…