In the Linux kernel, the following vulnerability has been resolved:
iio: gts-helper: Fix memory leaks in iiogtsbuildavailscale_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 gtstestitimes 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 gtstestitimes size 5.
The reason is that the pertimegains[i] is not freed which is allocated in the "gts->numitime" for loop in iiogtsbuildavailscaletable().
[
{
"deprecated": false,
"signature_version": "v1",
"digest": {
"length": 1097.0,
"function_hash": "269932584383089937981024355089664840259"
},
"id": "CVE-2024-50231-1b44d815",
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@691e79ffc42154a9c91dc3b7e96a307037b4be74",
"target": {
"file": "drivers/iio/industrialio-gts-helper.c",
"function": "iio_gts_build_avail_scale_table"
}
},
{
"deprecated": false,
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"132292487025350170494029120148401132327",
"187484480292217424753505214779091388282",
"145463890830548058312919597665193688641"
]
},
"id": "CVE-2024-50231-73e74d00",
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@691e79ffc42154a9c91dc3b7e96a307037b4be74",
"target": {
"file": "drivers/iio/industrialio-gts-helper.c"
}
}
]