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Message-ID: <2025022624-CVE-2022-49235-52fb@gregkh> Date: Wed, 26 Feb 2025 02:57:20 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2022-49235: ath9k_htc: fix uninit value bugs Description =========== In the Linux kernel, the following vulnerability has been resolved: ath9k_htc: fix uninit value bugs Syzbot reported 2 KMSAN bugs in ath9k. All of them are caused by missing field initialization. In htc_connect_service() svc_meta_len and pad are not initialized. Based on code it looks like in current skb there is no service data, so simply initialize svc_meta_len to 0. htc_issue_send() does not initialize htc_frame_hdr::control array. Based on firmware code, it will initialize it by itself, so simply zero whole array to make KMSAN happy Fail logs: BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline] hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline] htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275 ... Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258 ... Bytes 4-7 of 18 are uninitialized Memory access of size 18 starts at ffff888027377e00 BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline] hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline] htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275 ... Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258 ... Bytes 16-17 of 18 are uninitialized Memory access of size 18 starts at ffff888027377e00 The Linux kernel CVE team has assigned CVE-2022-49235 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.9.311 with commit 5c2a6a8daa17a3f65b38b9a5574bb362c13fa1d9 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.14.276 with commit e352acdd378e9263cc4c6018e588f2dac7161d07 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.19.238 with commit ee4222052a76559c20e821bc3519cefb58b6d3e9 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.4.189 with commit 4d244b731188e0b63fc40a9d2dec72e9181fb37c Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.10.110 with commit 11f11ac281f0c0b363d2940204f28bae0422ed71 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.15.33 with commit 0b700f7d06492de34964b6f414120043364f8191 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.16.19 with commit 7da6169b6ebb75816b57be3beb829afa74f3b4b6 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.17.2 with commit 5abf2b761b998063f5e2bae93fd4ab10e2a80f10 Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.18 with commit d1e0df1c57bd30871dd1c855742a7c346dbca853 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-2022-49235 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/ath/ath9k/htc_hst.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/5c2a6a8daa17a3f65b38b9a5574bb362c13fa1d9 https://git.kernel.org/stable/c/e352acdd378e9263cc4c6018e588f2dac7161d07 https://git.kernel.org/stable/c/ee4222052a76559c20e821bc3519cefb58b6d3e9 https://git.kernel.org/stable/c/4d244b731188e0b63fc40a9d2dec72e9181fb37c https://git.kernel.org/stable/c/11f11ac281f0c0b363d2940204f28bae0422ed71 https://git.kernel.org/stable/c/0b700f7d06492de34964b6f414120043364f8191 https://git.kernel.org/stable/c/7da6169b6ebb75816b57be3beb829afa74f3b4b6 https://git.kernel.org/stable/c/5abf2b761b998063f5e2bae93fd4ab10e2a80f10 https://git.kernel.org/stable/c/d1e0df1c57bd30871dd1c855742a7c346dbca853
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