Memory Leak Affecting kernel-azure-devel package, versions <6.4.0-150600.8.20.1
Threat Intelligence
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Test your applications- Snyk IDSNYK-SLES156-KERNELAZUREDEVEL-8505228
- published14 Dec 2024
- disclosed13 Dec 2024
Introduced: 13 Dec 2024
CVE-2024-50231 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-azure-devel to version 6.4.0-150600.8.20.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-azure-devel package and not the kernel-azure-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
iio: gts-helper: Fix memory leaks in iio_gts_build_avail_scale_table()
modprobe iio-test-gts and rmmod it, then the following memory leak occurs:
unreferenced object 0xffffff80c810be00 (size 64):
comm "kunit_try_catch", pid 1654, jiffies 4294913981
hex dump (first 32 bytes):
02 00 00 00 08 00 00 00 20 00 00 00 40 00 00 00 ........ ...@...
80 00 00 00 00 02 00 00 00 04 00 00 00 08 00 00 ................
backtrace (crc a63d875e):
[<0000000028c1b3c2>] kmemleak_alloc+0x34/0x40
[<000000001d6ecc87>] __kmalloc_noprof+0x2bc/0x3c0
[<00000000393795c1>] devm_iio_init_iio_gts+0x4b4/0x16f4
[<0000000071bb4b09>] 0xffffffdf052a62e0
[<000000000315bc18>] 0xffffffdf052a6488
[<00000000f9dc55b5>] kunit_try_run_case+0x13c/0x3ac
[<00000000175a3fd4>] kunit_generic_run_threadfn_adapter+0x80/0xec
[<00000000f505065d>] kthread+0x2e8/0x374
[<00000000bbfb0e5d>] ret_from_fork+0x10/0x20
unreferenced object 0xffffff80cbfe9e70 (size 16):
comm "kunit_try_catch", pid 1658, jiffies 4294914015
hex dump (first 16 bytes):
10 00 00 00 40 00 00 00 80 00 00 00 00 00 00 00 ....@...........
backtrace (crc 857f0cb4):
[<0000000028c1b3c2>] kmemleak_alloc+0x34/0x40
[<000000001d6ecc87>] __kmalloc_noprof+0x2bc/0x3c0
[<00000000393795c1>] devm_iio_init_iio_gts+0x4b4/0x16f4
[<0000000071bb4b09>] 0xffffffdf052a62e0
[<000000007d089d45>] 0xffffffdf052a6864
[<00000000f9dc55b5>] kunit_try_run_case+0x13c/0x3ac
[<00000000175a3fd4>] kunit_generic_run_threadfn_adapter+0x80/0xec
[<00000000f505065d>] kthread+0x2e8/0x374
[<00000000bbfb0e5d>] ret_from_fork+0x10/0x20
......
It includes 55 times "size 64" memory leaks, which correspond to 5 times test_init_iio_gain_scale() calls with gts_test_gains size 10 (10size(int)) and gts_test_itimes size 5. It also includes 51 times "size 16" memory leak, which correspond to one time __test_init_iio_gain_scale() call with gts_test_gains_gain_low size 3 (3size(int)) and gts_test_itimes size 5.
The reason is that the per_time_gains[i] is not freed which is allocated in the "gts->num_itime" for loop in iio_gts_build_avail_scale_table().
References
- https://www.suse.com/security/cve/CVE-2024-50231.html
- https://bugzilla.suse.com/1233208
- https://git.kernel.org/stable/c/16e41593825c3044efca0eb34b2d6ffba306e4ec
- https://git.kernel.org/stable/c/38d6e8be234d87b0eedca50309e25051888b39d1
- https://git.kernel.org/stable/c/691e79ffc42154a9c91dc3b7e96a307037b4be74