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[ 254.423842][ T8047] ===================================================== | |
[ 254.430576][ T8047] BUG: KMSAN: uninit-value in __nla_validate_parse+0x3d62/0x4f90 | |
[ 254.434357][ T8047] __nla_validate_parse+0x3d62/0x4f90 | |
[ 254.437054][ T8047] __nla_parse+0x6a/0x80 | |
[ 254.439556][ T8047] nfnetlink_rcv_msg+0x74c/0xed0 | |
[ 254.444928][ T8047] netlink_rcv_skb+0x58f/0x6d0 | |
[ 254.447359][ T8047] nfnetlink_rcv+0x3e8/0x4d10 | |
[ 254.449893][ T8047] netlink_unicast+0x107c/0x13e0 | |
[ 254.452371][ T8047] netlink_sendmsg+0x132c/0x1540 | |
[ 254.454791][ T8047] ____sys_sendmsg+0xa5b/0xe70 | |
[ 254.456975][ T8047] ___sys_sendmsg+0x2a7/0x3f0 | |
[ 254.459423][ T8047] __x64_sys_sendmsg+0x342/0x510 | |
[ 254.461514][ T8047] do_syscall_64+0xcf/0x1e0 | |
[ 254.463345][ T8047] entry_SYSCALL_64_after_hwframe+0x63/0x6b | |
[ 254.465643][ T8047] | |
[ 254.466539][ T8047] Uninit was created at: | |
[ 254.468194][ T8047] kmem_cache_alloc_node+0x5cb/0xbc0 | |
[ 254.470272][ T8047] kmalloc_reserve+0x14d/0x500 | |
[ 254.471882][ T8047] __alloc_skb+0x385/0x820 | |
[ 254.473385][ T8047] netlink_sendmsg+0xbd6/0x1540 | |
[ 254.475011][ T8047] ____sys_sendmsg+0xa5b/0xe70 | |
[ 254.476534][ T8047] ___sys_sendmsg+0x2a7/0x3f0 | |
[ 254.478039][ T8047] __x64_sys_sendmsg+0x342/0x510 | |
[ 254.479628][ T8047] do_syscall_64+0xcf/0x1e0 | |
[ 254.480995][ T8047] entry_SYSCALL_64_after_hwframe+0x63/0x6b | |
[ 254.482719][ T8047] |
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// autogenerated by syzkaller (https://github.com/google/syzkaller) | |
#define _GNU_SOURCE | |
#include <dirent.h> | |
#include <endian.h> | |
#include <errno.h> | |
#include <fcntl.h> | |
#include <signal.h> | |
#include <stdarg.h> | |
#include <stdbool.h> | |
#include <stdint.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <sys/prctl.h> | |
#include <sys/stat.h> | |
#include <sys/syscall.h> | |
#include <sys/types.h> | |
#include <sys/wait.h> | |
#include <time.h> | |
#include <unistd.h> | |
static void sleep_ms(uint64_t ms) { | |
usleep(ms * 1000); | |
} | |
static uint64_t current_time_ms(void) { | |
struct timespec ts; | |
if (clock_gettime(CLOCK_MONOTONIC, &ts)) | |
exit(1); | |
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; | |
} | |
#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) | |
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ | |
*(type*)(addr) = \ | |
htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ | |
(((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) | |
static bool write_file(const char* file, const char* what, ...) { | |
char buf[1024]; | |
va_list args; | |
va_start(args, what); | |
vsnprintf(buf, sizeof(buf), what, args); | |
va_end(args); | |
buf[sizeof(buf) - 1] = 0; | |
int len = strlen(buf); | |
int fd = open(file, O_WRONLY | O_CLOEXEC); | |
if (fd == -1) | |
return false; | |
if (write(fd, buf, len) != len) { | |
int err = errno; | |
close(fd); | |
errno = err; | |
return false; | |
} | |
close(fd); | |
return true; | |
} | |
static void kill_and_wait(int pid, int* status) { | |
kill(-pid, SIGKILL); | |
kill(pid, SIGKILL); | |
for (int i = 0; i < 100; i++) { | |
if (waitpid(-1, status, WNOHANG | __WALL) == pid) | |
return; | |
usleep(1000); | |
} | |
DIR* dir = opendir("/sys/fs/fuse/connections"); | |
if (dir) { | |
for (;;) { | |
struct dirent* ent = readdir(dir); | |
if (!ent) | |
break; | |
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) | |
continue; | |
char abort[300]; | |
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", | |
ent->d_name); | |
int fd = open(abort, O_WRONLY); | |
if (fd == -1) { | |
continue; | |
} | |
if (write(fd, abort, 1) < 0) { | |
} | |
close(fd); | |
} | |
closedir(dir); | |
} else { | |
} | |
while (waitpid(-1, status, __WALL) != pid) { | |
} | |
} | |
static void setup_test() { | |
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); | |
setpgrp(); | |
write_file("/proc/self/oom_score_adj", "1000"); | |
} | |
static void execute_one(void); | |
#define WAIT_FLAGS __WALL | |
static void loop(void) { | |
int iter = 0; | |
for (;; iter++) { | |
int pid = fork(); | |
if (pid < 0) | |
exit(1); | |
if (pid == 0) { | |
setup_test(); | |
execute_one(); | |
exit(0); | |
} | |
int status = 0; | |
uint64_t start = current_time_ms(); | |
for (;;) { | |
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) | |
break; | |
sleep_ms(1); | |
if (current_time_ms() - start < 5000) | |
continue; | |
kill_and_wait(pid, &status); | |
break; | |
} | |
} | |
} | |
uint64_t r[1] = {0xffffffffffffffff}; | |
void execute_one(void) { | |
intptr_t res = 0; | |
res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc); | |
if (res != -1) | |
r[0] = res; | |
*(uint64_t*)0x20000080 = 0; | |
*(uint32_t*)0x20000088 = 0; | |
*(uint64_t*)0x20000090 = 0x20000040; | |
*(uint64_t*)0x20000040 = 0x20000100; | |
*(uint32_t*)0x20000100 = 0x18; | |
*(uint8_t*)0x20000104 = 0; | |
*(uint8_t*)0x20000105 = 0xb; | |
*(uint16_t*)0x20000106 = 0x401; | |
*(uint32_t*)0x20000108 = 0; | |
*(uint32_t*)0x2000010c = 0; | |
*(uint8_t*)0x20000110 = 0; | |
*(uint8_t*)0x20000111 = 0; | |
*(uint16_t*)0x20000112 = htobe16(0); | |
*(uint16_t*)0x20000114 = 4; | |
STORE_BY_BITMASK(uint16_t, , 0x20000116, 2, 0, 14); | |
STORE_BY_BITMASK(uint16_t, , 0x20000117, 0, 6, 1); | |
STORE_BY_BITMASK(uint16_t, , 0x20000117, 1, 7, 1); | |
*(uint64_t*)0x20000048 = 0x18; | |
*(uint64_t*)0x20000098 = 1; | |
*(uint64_t*)0x200000a0 = 0; | |
*(uint64_t*)0x200000a8 = 0; | |
*(uint32_t*)0x200000b0 = 0; | |
syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000080ul, /*f=*/0ul); | |
} | |
int main(void) { | |
syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, | |
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); | |
syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul, | |
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); | |
syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, | |
/*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); | |
loop(); | |
return 0; | |
} |
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r0 = socket$nl_netfilter(0x10, 0x3, 0xc) | |
sendmsg$IPCTNL_MSG_CT_NEW(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000100)={0x18, 0x0, 0xb, 0x401, 0x0, 0x0, {}, [@CTA_TUPLE_REPLY={0x4}]}, 0x18}}, 0x0) |
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