CVE-2024-50280

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix flushing uninitialized delayed_work on cache_ctr error An unexpected WARN_ON from flush_work() may occur when cache creation fails, caused by destroying the uninitialized delayed_work waker in the error path of cache_create(). For example, the warning appears on the superblock checksum error. Reproduce steps: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" Kernel logs: (snip) WARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890 Fix by pulling out the cancel_delayed_work_sync() from the constructor's error path. This patch doesn't affect the use-after-free fix for concurrent dm_resume and dm_destroy (commit 6a459d8edbdb ("dm cache: Fix UAF in destroy()")) as cache_dtr is not changed.

• linux linux kernel (>= 4.9.337 < 4.10) • linux linux kernel (>= 4.14.303 < 4.15) • linux linux kernel (>= 4.19.270 < 4.20) • linux linux kernel (>= 5.4.229 < 5.5) • linux linux kernel (>= 5.10.163 < 5.11) • linux linux kernel (>= 5.15.87 < 5.16) • linux linux kernel (>= 6.0.18 < 6.1) • linux linux kernel (>= 6.1.4 < 6.1.117) • linux linux kernel (>= 6.2 < 6.6.61) • linux linux kernel (>= 6.7 < 6.11.8) • linux linux kernel 6.12