| 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-2024-47715: wifi: mt76: mt7915: fix oops on non-dbdc mt7986 |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: mt76: mt7915: fix oops on non-dbdc mt7986 |
| |
| mt7915_band_config() sets band_idx = 1 on the main phy for mt7986 |
| with MT7975_ONE_ADIE or MT7976_ONE_ADIE. |
| |
| Commit 0335c034e726 ("wifi: mt76: fix race condition related to |
| checking tx queue fill status") introduced a dereference of the |
| phys array indirectly indexed by band_idx via wcid->phy_idx in |
| mt76_wcid_cleanup(). This caused the following Oops on affected |
| mt7986 devices: |
| |
| Unable to handle kernel read from unreadable memory at virtual address 0000000000000024 |
| Mem abort info: |
| ESR = 0x0000000096000005 |
| EC = 0x25: DABT (current EL), IL = 32 bits |
| SET = 0, FnV = 0 |
| EA = 0, S1PTW = 0 |
| FSC = 0x05: level 1 translation fault |
| Data abort info: |
| ISV = 0, ISS = 0x00000005 |
| CM = 0, WnR = 0 |
| user pgtable: 4k pages, 39-bit VAs, pgdp=0000000042545000 |
| [0000000000000024] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 |
| Internal error: Oops: 0000000096000005 [#1] SMP |
| Modules linked in: ... mt7915e mt76_connac_lib mt76 mac80211 cfg80211 ... |
| CPU: 2 PID: 1631 Comm: hostapd Not tainted 5.15.150 #0 |
| Hardware name: ZyXEL EX5700 (Telenor) (DT) |
| pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) |
| pc : mt76_wcid_cleanup+0x84/0x22c [mt76] |
| lr : mt76_wcid_cleanup+0x64/0x22c [mt76] |
| sp : ffffffc00a803700 |
| x29: ffffffc00a803700 x28: ffffff80008f7300 x27: ffffff80003f3c00 |
| x26: ffffff80000a7880 x25: ffffffc008c26e00 x24: 0000000000000001 |
| x23: ffffffc000a68114 x22: 0000000000000000 x21: ffffff8004172cc8 |
| x20: ffffffc00a803748 x19: ffffff8004152020 x18: 0000000000000000 |
| x17: 00000000000017c0 x16: ffffffc008ef5000 x15: 0000000000000be0 |
| x14: ffffff8004172e28 x13: ffffff8004172e28 x12: 0000000000000000 |
| x11: 0000000000000000 x10: ffffff8004172e30 x9 : ffffff8004172e28 |
| x8 : 0000000000000000 x7 : ffffff8004156020 x6 : 0000000000000000 |
| x5 : 0000000000000031 x4 : 0000000000000000 x3 : 0000000000000001 |
| x2 : 0000000000000000 x1 : ffffff80008f7300 x0 : 0000000000000024 |
| Call trace: |
| mt76_wcid_cleanup+0x84/0x22c [mt76] |
| __mt76_sta_remove+0x70/0xbc [mt76] |
| mt76_sta_state+0x8c/0x1a4 [mt76] |
| mt7915_eeprom_get_power_delta+0x11e4/0x23a0 [mt7915e] |
| drv_sta_state+0x144/0x274 [mac80211] |
| sta_info_move_state+0x1cc/0x2a4 [mac80211] |
| sta_set_sinfo+0xaf8/0xc24 [mac80211] |
| sta_info_destroy_addr_bss+0x4c/0x6c [mac80211] |
| |
| ieee80211_color_change_finish+0x1c08/0x1e70 [mac80211] |
| cfg80211_check_station_change+0x1360/0x4710 [cfg80211] |
| genl_family_rcv_msg_doit+0xb4/0x110 |
| genl_rcv_msg+0xd0/0x1bc |
| netlink_rcv_skb+0x58/0x120 |
| genl_rcv+0x34/0x50 |
| netlink_unicast+0x1f0/0x2ec |
| netlink_sendmsg+0x198/0x3d0 |
| ____sys_sendmsg+0x1b0/0x210 |
| ___sys_sendmsg+0x80/0xf0 |
| __sys_sendmsg+0x44/0xa0 |
| __arm64_sys_sendmsg+0x20/0x30 |
| invoke_syscall.constprop.0+0x4c/0xe0 |
| do_el0_svc+0x40/0xd0 |
| el0_svc+0x14/0x4c |
| el0t_64_sync_handler+0x100/0x110 |
| el0t_64_sync+0x15c/0x160 |
| Code: d2800002 910092c0 52800023 f9800011 (885f7c01) |
| ---[ end trace 7e42dd9a39ed2281 ]--- |
| |
| Fix by using mt76_dev_phy() which will map band_idx to the correct phy |
| for all hardware combinations. |
| |
| The Linux kernel CVE team has assigned CVE-2024-47715 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6.48 with commit d2defcddfe90b3be0cfccc2482495ab1fb759586 and fixed in 6.6.54 with commit 818dd118f4a997f8b4fe9c010b22402d410a2424 |
| Issue introduced in 6.7 with commit 0335c034e7265d36d956e806f33202c94a8a9860 and fixed in 6.10.13 with commit 7c128f3ff0be5802aef66f332e4bba6afe98735e |
| Issue introduced in 6.7 with commit 0335c034e7265d36d956e806f33202c94a8a9860 and fixed in 6.11.2 with commit a94d2bd111b39f0c2c7fcbfbf8276ab98c3b8353 |
| Issue introduced in 6.7 with commit 0335c034e7265d36d956e806f33202c94a8a9860 and fixed in 6.12 with commit 862bf7cbd772c2bad570ef0c5b5556a1330656dd |
| |
| 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-2024-47715 |
| 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/net/wireless/mediatek/mt76/mac80211.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/818dd118f4a997f8b4fe9c010b22402d410a2424 |
| https://git.kernel.org/stable/c/7c128f3ff0be5802aef66f332e4bba6afe98735e |
| https://git.kernel.org/stable/c/a94d2bd111b39f0c2c7fcbfbf8276ab98c3b8353 |
| https://git.kernel.org/stable/c/862bf7cbd772c2bad570ef0c5b5556a1330656dd |
