First published: Thu Apr 04 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix double-free on socket dismantle when MPTCP server accepts an incoming connection, it clones its listener socket. However, the pointer to 'inet_opt' for the new socket has the same value as the original one: as a consequence, on program exit it's possible to observe the following splat: BUG: KASAN: double-free in inet_sock_destruct+0x54f/0x8b0 Free of addr ffff888485950880 by task swapper/25/0 CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Not tainted 6.8.0-rc1+ #609 Hardware name: Supermicro SYS-6027R-72RF/X9DRH-7TF/7F/iTF/iF, BIOS 3.0 07/26/2013 Call Trace: <IRQ> dump_stack_lvl+0x32/0x50 print_report+0xca/0x620 kasan_report_invalid_free+0x64/0x90 __kasan_slab_free+0x1aa/0x1f0 kfree+0xed/0x2e0 inet_sock_destruct+0x54f/0x8b0 __sk_destruct+0x48/0x5b0 rcu_do_batch+0x34e/0xd90 rcu_core+0x559/0xac0 __do_softirq+0x183/0x5a4 irq_exit_rcu+0x12d/0x170 sysvec_apic_timer_interrupt+0x6b/0x80 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 RIP: 0010:cpuidle_enter_state+0x175/0x300 Code: 30 00 0f 84 1f 01 00 00 83 e8 01 83 f8 ff 75 e5 48 83 c4 18 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc fb 45 85 ed <0f> 89 60 ff ff ff 48 c1 e5 06 48 c7 43 18 00 00 00 00 48 83 44 2b RSP: 0018:ffff888481cf7d90 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff88887facddc8 RCX: 0000000000000000 RDX: 1ffff1110ff588b1 RSI: 0000000000000019 RDI: ffff88887fac4588 RBP: 0000000000000004 R08: 0000000000000002 R09: 0000000000043080 R10: 0009b02ea273363f R11: ffff88887fabf42b R12: ffffffff932592e0 R13: 0000000000000004 R14: 0000000000000000 R15: 00000022c880ec80 cpuidle_enter+0x4a/0xa0 do_idle+0x310/0x410 cpu_startup_entry+0x51/0x60 start_secondary+0x211/0x270 secondary_startup_64_no_verify+0x184/0x18b </TASK> Allocated by task 6853: kasan_save_stack+0x1c/0x40 kasan_save_track+0x10/0x30 __kasan_kmalloc+0xa6/0xb0 __kmalloc+0x1eb/0x450 cipso_v4_sock_setattr+0x96/0x360 netlbl_sock_setattr+0x132/0x1f0 selinux_netlbl_socket_post_create+0x6c/0x110 selinux_socket_post_create+0x37b/0x7f0 security_socket_post_create+0x63/0xb0 __sock_create+0x305/0x450 __sys_socket_create.part.23+0xbd/0x130 __sys_socket+0x37/0xb0 __x64_sys_socket+0x6f/0xb0 do_syscall_64+0x83/0x160 entry_SYSCALL_64_after_hwframe+0x6e/0x76 Freed by task 6858: kasan_save_stack+0x1c/0x40 kasan_save_track+0x10/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x12c/0x1f0 kfree+0xed/0x2e0 inet_sock_destruct+0x54f/0x8b0 __sk_destruct+0x48/0x5b0 subflow_ulp_release+0x1f0/0x250 tcp_cleanup_ulp+0x6e/0x110 tcp_v4_destroy_sock+0x5a/0x3a0 inet_csk_destroy_sock+0x135/0x390 tcp_fin+0x416/0x5c0 tcp_data_queue+0x1bc8/0x4310 tcp_rcv_state_process+0x15a3/0x47b0 tcp_v4_do_rcv+0x2c1/0x990 tcp_v4_rcv+0x41fb/0x5ed0 ip_protocol_deliver_rcu+0x6d/0x9f0 ip_local_deliver_finish+0x278/0x360 ip_local_deliver+0x182/0x2c0 ip_rcv+0xb5/0x1c0 __netif_receive_skb_one_core+0x16e/0x1b0 process_backlog+0x1e3/0x650 __napi_poll+0xa6/0x500 net_rx_action+0x740/0xbb0 __do_softirq+0x183/0x5a4 The buggy address belongs to the object at ffff888485950880 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff888485950880, ffff8884859508c0) The buggy address belongs to the physical page: page:0000000056d1e95e refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888485950700 pfn:0x485950 flags: 0x57ffffc0000800(slab|node=1|zone=2|lastcpupid=0x1fffff) page_type: 0xffffffff() raw: 0057ffffc0000800 ffff88810004c640 ffffea00121b8ac0 dead000000000006 raw: ffff888485950700 0000000000200019 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888485950780: fa fb fb ---truncated---
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Software | Affected Version | How to fix |
---|---|---|
ubuntu/linux | <5.15.0-112.122 | 5.15.0-112.122 |
ubuntu/linux | <6.5.0-44.44 | 6.5.0-44.44 |
ubuntu/linux | <6.8~ | 6.8~ |
ubuntu/linux-aws | <5.15.0-1063.69 | 5.15.0-1063.69 |
ubuntu/linux-aws | <6.8~ | 6.8~ |
ubuntu/linux-aws-5.15 | <5.15.0-1063.69~20.04.1 | 5.15.0-1063.69~20.04.1 |
ubuntu/linux-aws-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-aws-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-aws-6.5 | <6.5.0-1023.23~22.04.1 | 6.5.0-1023.23~22.04.1 |
ubuntu/linux-aws-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-aws-fips | <6.8~ | 6.8~ |
ubuntu/linux-aws-hwe | <6.8~ | 6.8~ |
ubuntu/linux-azure | <5.15.0-1066.75 | 5.15.0-1066.75 |
ubuntu/linux-azure | <6.8~ | 6.8~ |
ubuntu/linux-azure-4.15 | <6.8~ | 6.8~ |
ubuntu/linux-azure-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-azure-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-azure-6.5 | <6.5.0-1024.25~22.04.1 | 6.5.0-1024.25~22.04.1 |
ubuntu/linux-azure-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-azure-fde | <5.15.0-1067.76.1 | 5.15.0-1067.76.1 |
ubuntu/linux-azure-fde | <6.8~ | 6.8~ |
ubuntu/linux-azure-fde-5.15 | <5.15.0-1065.74~20.04.1.1 | 5.15.0-1065.74~20.04.1.1 |
ubuntu/linux-azure-fde-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-azure-fips | <6.8~ | 6.8~ |
ubuntu/linux-bluefield | <6.8~ | 6.8~ |
ubuntu/linux-fips | <6.8~ | 6.8~ |
ubuntu/linux-gcp | <5.15.0-1062.70 | 5.15.0-1062.70 |
ubuntu/linux-gcp | <6.5.0-1024.26 | 6.5.0-1024.26 |
ubuntu/linux-gcp | <6.8~ | 6.8~ |
ubuntu/linux-gcp-4.15 | <6.8~ | 6.8~ |
ubuntu/linux-gcp-5.15 | <5.15.0-1062.70~20.04.1 | 5.15.0-1062.70~20.04.1 |
ubuntu/linux-gcp-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-gcp-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-gcp-6.5 | <6.5.0-1024.26~22.04.1 | 6.5.0-1024.26~22.04.1 |
ubuntu/linux-gcp-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-gcp-fips | <6.8~ | 6.8~ |
ubuntu/linux-gke | <5.15.0-1060.66 | 5.15.0-1060.66 |
ubuntu/linux-gke | <6.8~ | 6.8~ |
ubuntu/linux-gkeop | <5.15.0-1046.53 | 5.15.0-1046.53 |
ubuntu/linux-gkeop | <6.8~ | 6.8~ |
ubuntu/linux-gkeop-5.15 | <5.15.0-1046.53~20.04.1 | 5.15.0-1046.53~20.04.1 |
ubuntu/linux-gkeop-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-hwe | <6.8~ | 6.8~ |
ubuntu/linux-hwe-5.15 | <5.15.0-113.123~20.04.1 | 5.15.0-113.123~20.04.1 |
ubuntu/linux-hwe-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-hwe-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-hwe-6.5 | <6.5.0-44.44~22.04.1 | 6.5.0-44.44~22.04.1 |
ubuntu/linux-hwe-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-ibm | <5.15.0-1056.59 | 5.15.0-1056.59 |
ubuntu/linux-ibm | <6.8~ | 6.8~ |
ubuntu/linux-ibm-5.15 | <5.15.0-1057.60~20.04.1 | 5.15.0-1057.60~20.04.1 |
ubuntu/linux-ibm-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-ibm-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-intel | <6.8~ | 6.8~ |
ubuntu/linux-intel-iotg | <5.15.0-1058.64 | 5.15.0-1058.64 |
ubuntu/linux-intel-iotg | <6.8~ | 6.8~ |
ubuntu/linux-intel-iotg-5.15 | <5.15.0-1058.64~20.04.1 | 5.15.0-1058.64~20.04.1 |
ubuntu/linux-intel-iotg-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-iot | <6.8~ | 6.8~ |
ubuntu/linux-kvm | <5.15.0-1060.65 | 5.15.0-1060.65 |
ubuntu/linux-kvm | <6.8~ | 6.8~ |
ubuntu/linux-laptop | <6.8~ | 6.8~ |
ubuntu/linux-lowlatency | <5.15.0-110.120 | 5.15.0-110.120 |
ubuntu/linux-lowlatency | <6.8~ | 6.8~ |
ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-110.120~20.04.1 | 5.15.0-110.120~20.04.1 |
ubuntu/linux-lowlatency-hwe-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-lowlatency-hwe-6.5 | <6.5.0-44.44.1~22.04.1 | 6.5.0-44.44.1~22.04.1 |
ubuntu/linux-lowlatency-hwe-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-lts-xenial | <6.8~ | 6.8~ |
ubuntu/linux-nvidia | <5.15.0-1058.59 | 5.15.0-1058.59 |
ubuntu/linux-nvidia | <6.8~ | 6.8~ |
ubuntu/linux-nvidia-6.5 | <6.5.0-1023.24 | 6.5.0-1023.24 |
ubuntu/linux-nvidia-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-oem-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-oem-6.8 | <6.8~ | 6.8~ |
ubuntu/linux-oracle | <5.15.0-1061.67 | 5.15.0-1061.67 |
ubuntu/linux-oracle | <6.8~ | 6.8~ |
ubuntu/linux-oracle-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-oracle-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-oracle-6.5 | <6.5.0-1026.26~22.04.1 | 6.5.0-1026.26~22.04.1 |
ubuntu/linux-oracle-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-raspi | <6.5.0-1020.23 | 6.5.0-1020.23 |
ubuntu/linux-raspi | <6.8~ | 6.8~ |
ubuntu/linux-raspi-5.4 | <6.8~ | 6.8~ |
ubuntu/linux-riscv | <6.8~ | 6.8~ |
ubuntu/linux-riscv-5.15 | <5.15.0-1059.63~20.04.1 | 5.15.0-1059.63~20.04.1 |
ubuntu/linux-riscv-5.15 | <6.8~ | 6.8~ |
ubuntu/linux-riscv-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-starfive | <6.8~ | 6.8~ |
ubuntu/linux-starfive-6.5 | <6.5.0-1017.18~22.04.1 | 6.5.0-1017.18~22.04.1 |
ubuntu/linux-starfive-6.5 | <6.8~ | 6.8~ |
ubuntu/linux-xilinx-zynqmp | <5.15.0-1030.34 | 5.15.0-1030.34 |
ubuntu/linux-xilinx-zynqmp | <6.8~ | 6.8~ |
debian/linux | 5.10.218-1 5.10.221-1 6.1.94-1 6.1.99-1 6.9.10-1 |
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(Appears in the following advisories)