| 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-2022-49496: media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko |
| |
| If the driver support subdev mode, the parameter "dev->pm.dev" will be |
| NULL in mtk_vcodec_dec_remove. Kernel will crash when try to rmmod |
| mtk-vcodec-dec.ko. |
| |
| [ 4380.702726] pc : do_raw_spin_trylock+0x4/0x80 |
| [ 4380.707075] lr : _raw_spin_lock_irq+0x90/0x14c |
| [ 4380.711509] sp : ffff80000819bc10 |
| [ 4380.714811] x29: ffff80000819bc10 x28: ffff3600c03e4000 x27: 0000000000000000 |
| [ 4380.721934] x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 |
| [ 4380.729057] x23: ffff3600c0f34930 x22: ffffd5e923549000 x21: 0000000000000220 |
| [ 4380.736179] x20: 0000000000000208 x19: ffffd5e9213e8ebc x18: 0000000000000020 |
| [ 4380.743298] x17: 0000002000000000 x16: ffffd5e9213e8e90 x15: 696c346f65646976 |
| [ 4380.750420] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000040 |
| [ 4380.757542] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 |
| [ 4380.764664] x8 : 0000000000000000 x7 : ffff3600c7273ae8 x6 : ffffd5e9213e8ebc |
| [ 4380.771786] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 |
| [ 4380.778908] x2 : 0000000000000000 x1 : ffff3600c03e4000 x0 : 0000000000000208 |
| [ 4380.786031] Call trace: |
| [ 4380.788465] do_raw_spin_trylock+0x4/0x80 |
| [ 4380.792462] __pm_runtime_disable+0x2c/0x1b0 |
| [ 4380.796723] mtk_vcodec_dec_remove+0x5c/0xa0 [mtk_vcodec_dec] |
| [ 4380.802466] platform_remove+0x2c/0x60 |
| [ 4380.806204] __device_release_driver+0x194/0x250 |
| [ 4380.810810] driver_detach+0xc8/0x15c |
| [ 4380.814462] bus_remove_driver+0x5c/0xb0 |
| [ 4380.818375] driver_unregister+0x34/0x64 |
| [ 4380.822288] platform_driver_unregister+0x18/0x24 |
| [ 4380.826979] mtk_vcodec_dec_driver_exit+0x1c/0x888 [mtk_vcodec_dec] |
| [ 4380.833240] __arm64_sys_delete_module+0x190/0x224 |
| [ 4380.838020] invoke_syscall+0x48/0x114 |
| [ 4380.841760] el0_svc_common.constprop.0+0x60/0x11c |
| [ 4380.846540] do_el0_svc+0x28/0x90 |
| [ 4380.849844] el0_svc+0x4c/0x100 |
| [ 4380.852975] el0t_64_sync_handler+0xec/0xf0 |
| [ 4380.857148] el0t_64_sync+0x190/0x194 |
| [ 4380.860801] Code: 94431515 17ffffca d503201f d503245f (b9400004) |
| |
| The Linux kernel CVE team has assigned CVE-2022-49496 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 590577a4e5257ac3ed72999a94666ad6ba8f24bc and fixed in 5.18.3 with commit 1fa37b00dc55a061a3eb82e378849862b4aeca9d |
| Issue introduced in 4.10 with commit 590577a4e5257ac3ed72999a94666ad6ba8f24bc and fixed in 5.19 with commit c10c0086db688c95bb4e0e378e523818dff1551d |
| |
| 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-2022-49496 |
| 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/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.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/1fa37b00dc55a061a3eb82e378849862b4aeca9d |
| https://git.kernel.org/stable/c/c10c0086db688c95bb4e0e378e523818dff1551d |
