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THREATINT
PUBLISHED

CVE-2024-53049

slub/kunit: fix a WARNING due to unwrapped __kmalloc_cache_noprof



Description

In the Linux kernel, the following vulnerability has been resolved: slub/kunit: fix a WARNING due to unwrapped __kmalloc_cache_noprof 'modprobe slub_kunit' will have a warning as shown below. The root cause is that __kmalloc_cache_noprof was directly used, which resulted in no alloc_tag being allocated. This caused current->alloc_tag to be null, leading to a warning in alloc_tag_add_check. Let's add an alloc_hook layer to __kmalloc_cache_noprof specifically within lib/slub_kunit.c, which is the only user of this internal slub function outside kmalloc implementation itself. [58162.947016] WARNING: CPU: 2 PID: 6210 at ./include/linux/alloc_tag.h:125 alloc_tagging_slab_alloc_hook+0x268/0x27c [58162.957721] Call trace: [58162.957919] alloc_tagging_slab_alloc_hook+0x268/0x27c [58162.958286] __kmalloc_cache_noprof+0x14c/0x344 [58162.958615] test_kmalloc_redzone_access+0x50/0x10c [slub_kunit] [58162.959045] kunit_try_run_case+0x74/0x184 [kunit] [58162.959401] kunit_generic_run_threadfn_adapter+0x2c/0x4c [kunit] [58162.959841] kthread+0x10c/0x118 [58162.960093] ret_from_fork+0x10/0x20 [58162.960363] ---[ end trace 0000000000000000 ]---

Reserved 2024-11-19 | Published 2024-11-19 | Updated 2024-11-19 | Assigner Linux

Product status

Default status
unaffected

a0a44d9175b3 before 79aea7dfd98f
affected

a0a44d9175b3 before 2b059d0d1e62
affected

Default status
affected

6.11
affected

Any version before 6.11
unaffected

6.11.7
unaffected

6.12
unaffected

References

git.kernel.org/...c/79aea7dfd98fbbf282d1408fc21849fc9a677768

git.kernel.org/...c/2b059d0d1e624adc6e69a754bc48057f8bf459dc

cve.org (CVE-2024-53049)

nvd.nist.gov (CVE-2024-53049)

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