| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-50231: iio: gts-helper: Fix memory leaks in iio_gts_build_avail_scale_table() |
| |
| Description |
| =========== |
| |
| 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 5*5 times "size 64" memory leaks, which correspond to 5 times |
| test_init_iio_gain_scale() calls with gts_test_gains size 10 (10*size(int)) |
| and gts_test_itimes size 5. It also includes 5*1 times "size 16" |
| memory leak, which correspond to one time __test_init_iio_gain_scale() |
| call with gts_test_gains_gain_low size 3 (3*size(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(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-50231 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 38416c28e16890b52fdd5eb73479299ec3f062f3 and fixed in 6.6.60 with commit 38d6e8be234d87b0eedca50309e25051888b39d1 |
| Issue introduced in 6.4 with commit 38416c28e16890b52fdd5eb73479299ec3f062f3 and fixed in 6.11.7 with commit 16e41593825c3044efca0eb34b2d6ffba306e4ec |
| Issue introduced in 6.4 with commit 38416c28e16890b52fdd5eb73479299ec3f062f3 and fixed in 6.12 with commit 691e79ffc42154a9c91dc3b7e96a307037b4be74 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-50231 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/iio/industrialio-gts-helper.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/38d6e8be234d87b0eedca50309e25051888b39d1 |
| https://git.kernel.org/stable/c/16e41593825c3044efca0eb34b2d6ffba306e4ec |
| https://git.kernel.org/stable/c/691e79ffc42154a9c91dc3b7e96a307037b4be74 |
