cbcvebase.
CVE-2023-54293
published 2025-12-30

CVE-2023-54293: In the Linux kernel, the following vulnerability has been resolved: bcache: fixup btree_cache_wait list damage We get a kernel crash about "list_add…

PriorityP420
EPSS
0.17%
7.1th percentile
In the Linux kernel, the following vulnerability has been resolved: bcache: fixup btree_cache_wait list damage We get a kernel crash about "list_add corruption. next->prev should be prev (ffff9c801bc01210), but was ffff9c77b688237c. (next=ffffae586d8afe68)." crash> struct list_head 0xffff9c801bc01210 struct list_head { next = 0xffffae586d8afe68, prev = 0xffffae586d8afe68 } crash> struct list_head 0xffff9c77b688237c struct list_head { next = 0x0, prev = 0x0 } crash> struct list_head 0xffffae586d8afe68 struct list_head struct: invalid kernel virtual address: ffffae586d8afe68 type: "gdb_readmem_callback" Cannot access memory at address 0xffffae586d8afe68 [230469.019492] Call Trace: [230469.032041] prepare_to_wait+0x8a/0xb0 [230469.044363] ? bch_btree_keys_free+0x6c/0xc0 [escache] [230469.056533] mca_cannibalize_lock+0x72/0x90 [escache] [230469.068788] mca_alloc+0x2ae/0x450 [escache] [230469.080790] bch_btree_node_get+0x136/0x2d0 [escache] [230469.092681] bch_btree_check_thread+0x1e1/0x260 [escache] [230469.104382] ? finish_wait+0x80/0x80 [230469.115884] ? bch_btree_check_recurse+0x1a0/0x1a0 [escache] [230469.127259] kthread+0x112/0x130 [230469.138448] ? kthread_flush_work_fn+0x10/0x10 [230469.149477] ret_from_fork+0x35/0x40 bch_btree_check_thread() and bch_dirty_init_thread() may call mca_cannibalize() to cannibalize other cached btree nodes. Only one thread can do it at a time, so the op of other threads will be added to the btree_cache_wait list. We must call finish_wait() to remove op from btree_cache_wait before free it's memory address. Otherwise, the list will be damaged. Also should call bch_cannibalize_unlock() to release the btree_cache_alloc_lock and wake_up other waiters.

Affected

15 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.52-1 (bookworm)linux 6.1.52-1 (bookworm)
linuxlinux——
linuxlinux>= 8e7102273f597dbb38af43da874f8c123f8e6dbe < bcb295778afda4f2feb0d3c0289a53fd43d5a3a6bcb295778afda4f2feb0d3c0289a53fd43d5a3a6
linuxlinux>= 8e7102273f597dbb38af43da874f8c123f8e6dbe < cbdd5b3322f7bbe6454c97cac994757f1192c07bcbdd5b3322f7bbe6454c97cac994757f1192c07b
linuxlinux>= 8e7102273f597dbb38af43da874f8c123f8e6dbe < 25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed25ec4779d0fb3ed9cac1e4d9e0e4261b4a12f6ed
linuxlinux>= 8e7102273f597dbb38af43da874f8c123f8e6dbe < 2882a4c4f0c90e99f37dbd8db369b9982fd613e72882a4c4f0c90e99f37dbd8db369b9982fd613e7
linuxlinux>= 8e7102273f597dbb38af43da874f8c123f8e6dbe < f0854489fc07d2456f7cc71a63f4faf9c716ffbef0854489fc07d2456f7cc71a63f4faf9c716ffbe
linuxlinux_kernel>= 0 < 5.10.191-15.10.191-1
linuxlinux_kernel>= 0 < 6.1.52-16.1.52-1
linuxlinux_kernel>= 0 < 6.4.4-16.4.4-1
linuxlinux_kernel>= 0 < 6.4.4-16.4.4-1
linuxlinux_kernel>= 5.11.0 < 5.15.1215.15.121
linuxlinux_kernel>= 5.16.0 < 6.1.396.1.39
linuxlinux_kernel>= 5.7.0 < 5.10.1885.10.188
linuxlinux_kernel>= 6.2.0 < 6.4.46.4.4
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