In the Linux kernel, the following vulnerability has been resolved:
afpacket: fix vlangettci() vs MSGPEEK
Blamed commit forgot MSG_PEEK case, allowing a crash [1] as found by syzbot.
Rework vlangettci() to not touch skb at all, so that it can be used from many cpus on the same skb.
Add a const qualifier to skb argument.
[1] skbuff: skbunderpanic: text:ffffffff8a8da482 len:32 put:14 head:ffff88807a1d5800 data:ffff88807a1d5810 tail:0x14 end:0x140 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:206 ! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 5880 Comm: syz-executor172 Not tainted 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:skbpanic net/core/skbuff.c:206 [inline] RIP: 0010:skbunderpanic+0x14b/0x150 net/core/skbuff.c:216 Code: 0b 8d 48 c7 c6 9e 6c 26 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 3a 5a 79 f7 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc90003baf5b8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 8565c1eec37aa000 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff88802616fb50 R08: ffffffff817f0a4c R09: 1ffff92000775e50 R10: dffffc0000000000 R11: fffff52000775e51 R12: 0000000000000140 R13: ffff88807a1d5800 R14: ffff88807a1d5810 R15: 0000000000000014 FS: 00007fa03261f6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd65753000 CR3: 0000000031720000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skbpush+0xe5/0x100 net/core/skbuff.c:2636 vlangettci+0x272/0x550 net/packet/afpacket.c:565 packetrecvmsg+0x13c9/0x1ef0 net/packet/afpacket.c:3616 sockrecvmsgnosec net/socket.c:1044 [inline] sockrecvmsg+0x22f/0x280 net/socket.c:1066 _sysrecvmsg+0x1c6/0x480 net/socket.c:2814 sysrecvmsg net/socket.c:2856 [inline] dorecvmmsg+0x426/0xab0 net/socket.c:2951 _sysrecvmmsg net/socket.c:3025 [inline] _dosysrecvmmsg net/socket.c:3048 [inline] _sesysrecvmmsg net/socket.c:3041 [inline] _x64sysrecvmmsg+0x199/0x250 net/socket.c:3041 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xf3/0x230 arch/x86/entry/common.c:83
[
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@66ffb0cf2125dcf9e902eede4a43653a24fd9cb2",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-1ee583fd",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d91b4a9baa018a001d5c884e236c0cfd31f9f4a1",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-3bec2427",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@77ee7a6d16b6ec07b5c3ae2b6b60a24c1afbed09",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-3f361c14",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@65c67049e9ed481f6b52264b39618b8c6dfb1d3e",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-572e2bff",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fa57f07ba0622c8692f40e1300adca59277b0044",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-6c739e5f",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7aa78d0d8546d8ce5a764add3f55d72e707c18f1",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-6c918158",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@65c67049e9ed481f6b52264b39618b8c6dfb1d3e",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-77435f39",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b65292a548d847099a4fe0fff53122a06e798e25",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-7daf7407",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7aa78d0d8546d8ce5a764add3f55d72e707c18f1",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-8ed2adeb",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d91b4a9baa018a001d5c884e236c0cfd31f9f4a1",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-9df3a974",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@66ffb0cf2125dcf9e902eede4a43653a24fd9cb2",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-d51eecce",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"14932428354190307028156130357438893015",
"176351765633764501242561257389248931451",
"207880270065041824088754492353755245706",
"163043009507870926204638573732328625059",
"43749225754480917446997829195653023725",
"259676636027016021390035799212138802143",
"90850523531680439518303833177777007112",
"240470384021860296873549811434125967752",
"326717180749360595111235190236924713490",
"146464552086747634997872681887316360438",
"116430286517991379684188089646095323926",
"263620156719858102026688045971479799727",
"301787268372368626554971988778685015270",
"221015739614895919491774466642595928688",
"335404757768181268355587293570302079042",
"198577901092958549264588505060628135822"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fa57f07ba0622c8692f40e1300adca59277b0044",
"target": {
"file": "net/packet/af_packet.c"
},
"id": "CVE-2024-57902-e380f514",
"signature_type": "Line",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@77ee7a6d16b6ec07b5c3ae2b6b60a24c1afbed09",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-e57d36ba",
"signature_type": "Function",
"signature_version": "v1"
},
{
"deprecated": false,
"digest": {
"function_hash": "313620172651321471388075402304434535952",
"length": 622.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b65292a548d847099a4fe0fff53122a06e798e25",
"target": {
"file": "net/packet/af_packet.c",
"function": "vlan_get_tci"
},
"id": "CVE-2024-57902-f3d9d691",
"signature_type": "Function",
"signature_version": "v1"
}
]