In the Linux kernel, the following vulnerability has been resolved:
IB/hfi1: Fix sdma.h tx->num_descs off-by-one error
Unfortunately the commit `fd8958efe877` introduced another error
causing the `descs` array to overflow. This reults in further crashes
easily reproducible by `sendmsg` system call.
[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI
[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]
--
[ 1080.974535] Call Trace:
[ 1080.976990] <TASK>
[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]
[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]
[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]
[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]
[ 1081.046978] dev_hard_start_xmit+0xc4/0x210
--
[ 1081.148347] __sys_sendmsg+0x59/0xa0
crash> ipoib_txreq 0xffff9cfeba229f00
struct ipoib_txreq {
txreq = {
list = {
next = 0xffff9cfeba229f00,
prev = 0xffff9cfeba229f00
},
descp = 0xffff9cfeba229f40,
coalesce_buf = 0x0,
wait = 0xffff9cfea4e69a48,
complete = 0xffffffffc0fe0760 <hfi1_ipoib_sdma_complete>,
packet_len = 0x46d,
tlen = 0x0,
num_desc = 0x0,
desc_limit = 0x6,
next_descq_idx = 0x45c,
coalesce_idx = 0x0,
flags = 0x0,
descs = {{
qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)
}, {
qw = { 0x3800014231b108, 0x4}
}, {
qw = { 0x310000e4ee0fcf0, 0x8}
}, {
qw = { 0x3000012e9f8000, 0x8}
}, {
qw = { 0x59000dfb9d0000, 0x8}
}, {
qw = { 0x78000e02e40000, 0x8}
}}
},
sdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure
sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)
complete = 0x0,
priv = 0x0,
txq = 0xffff9cfea4e69880,
skb = 0xffff9d099809f400
}
If an SDMA send consists of exactly 6 descriptors and requires dword
padding (in the 7th descriptor), the sdma_txreq descriptor array is not
properly expanded and the packet will overflow into the container
structure. This results in a panic when the send completion runs. The
exact panic varies depending on what elements of the container structure
get corrupted. The fix is to use the correct expression in
_pad_sdma_tx_descs() to test the need to expand the descriptor array.
With this patch the crashes are no longer reproducible and the machine is
stable.
References
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
27 Feb 2025, 21:59
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Debian debian Linux
Debian Linux linux Kernel Linux |
|
| CWE | CWE-193 | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790 - Patch | |
| References | () https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2 - Patch | |
| References | () https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39 - Patch | |
| References | () https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b - Patch | |
| References | () https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5 - Patch | |
| References | () https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9 - Patch | |
| References | () https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a - Patch | |
| References | () https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6 - Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html - Mailing List | |
| References | () https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html - Mailing List |
Information
Published : 2024-04-03 17:15
Updated : 2025-02-27 21:59
NVD link : CVE-2024-26766
Mitre link : CVE-2024-26766
CVE.ORG link : CVE-2024-26766
JSON object : View
Products Affected
linux
- linux_kernel
debian
- debian_linux
CWE
CWE-193
Off-by-one Error