report

=====================================================
BUG: KMSAN: uninit-value in des3_ede_decrypt+0x8a6/0x1a40 lib/crypto/des.c:884
 des3_ede_decrypt+0x8a6/0x1a40 lib/crypto/des.c:884
 crypto_des3_ede_decrypt+0x3d/0x50 crypto/des_generic.c:82
 crypto_ecb_crypt crypto/ecb.c:23 [inline]
 crypto_ecb_decrypt2+0x19a/0x310 crypto/ecb.c:51
 crypto_lskcipher_crypt+0x34c/0x780 crypto/lskcipher.c:160
 crypto_lskcipher_decrypt+0x8d/0xb0 crypto/lskcipher.c:194
 crypto_cbc_decrypt_inplace crypto/cbc.c:108 [inline]
 crypto_cbc_decrypt+0x51d/0x960 crypto/cbc.c:131
 crypto_lskcipher_crypt_sg+0x46d/0x9c0 crypto/lskcipher.c:229
 crypto_lskcipher_decrypt_sg+0x95/0xc0 crypto/lskcipher.c:258
 crypto_skcipher_decrypt+0x136/0x210 crypto/skcipher.c:693
 cts_cbc_decrypt+0x526/0x720 crypto/cts.c:219
 crypto_cts_decrypt+0x7f4/0xa20 crypto/cts.c:280
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 memcpy_dir crypto/scatterwalk.c:23 [inline]
 scatterwalk_copychunks crypto/scatterwalk.c:38 [inline]
 scatterwalk_map_and_copy+0x755/0xa50 crypto/scatterwalk.c:67
 cts_cbc_decrypt+0x3ef/0x720 crypto/cts.c:211
 crypto_cts_decrypt+0x7f4/0xa20 crypto/cts.c:280
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 cts_cbc_decrypt+0x3aa/0x720 crypto/cts.c:208
 crypto_cts_decrypt+0x7f4/0xa20 crypto/cts.c:280
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 __crypto_xor+0x18f/0x1440 lib/crypto/utils.c:45
 crypto_xor include/crypto/utils.h:31 [inline]
 cts_cbc_decrypt+0x2d9/0x720 crypto/cts.c:199
 crypto_cts_decrypt+0x7f4/0xa20 crypto/cts.c:280
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 memcpy_dir crypto/scatterwalk.c:23 [inline]
 scatterwalk_copychunks crypto/scatterwalk.c:38 [inline]
 scatterwalk_map_and_copy+0x755/0xa50 crypto/scatterwalk.c:67
 cts_cbc_decrypt+0x1c4/0x720 crypto/cts.c:197
 crypto_cts_decrypt+0x7f4/0xa20 crypto/cts.c:280
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 __crypto_xor+0x18f/0x1440 lib/crypto/utils.c:45
 crypto_xor include/crypto/utils.h:31 [inline]
 crypto_cbc_decrypt_segment crypto/cbc.c:81 [inline]
 crypto_cbc_decrypt+0x2de/0x960 crypto/cbc.c:133
 crypto_lskcipher_crypt_sg+0x46d/0x9c0 crypto/lskcipher.c:229
 crypto_lskcipher_decrypt_sg+0x95/0xc0 crypto/lskcipher.c:258
 crypto_skcipher_decrypt+0x136/0x210 crypto/skcipher.c:693
 crypto_cts_decrypt+0x76c/0xa20 crypto/cts.c:279
 crypto_skcipher_decrypt+0x1d1/0x210 crypto/skcipher.c:695
 _skcipher_recvmsg crypto/algif_skcipher.c:199 [inline]
 skcipher_recvmsg+0x1636/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3819 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc+0x91f/0xf80 mm/slub.c:3994
 kmalloc include/linux/slab.h:594 [inline]
 sock_kmalloc+0x14b/0x200 net/core/sock.c:2685
 af_alg_alloc_areq+0xec/0x3c0 crypto/af_alg.c:1202
 _skcipher_recvmsg crypto/algif_skcipher.c:118 [inline]
 skcipher_recvmsg+0x56d/0x2350 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg net/socket.c:1068 [inline]
 __sys_recvfrom+0x52e/0x870 net/socket.c:2242
 __do_sys_recvfrom net/socket.c:2260 [inline]
 __se_sys_recvfrom net/socket.c:2256 [inline]
 __x64_sys_recvfrom+0x12a/0x1d0 net/socket.c:2256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 1 PID: 10736 Comm: syz-executor.1 Not tainted 6.8.0-rc4-00180-g4f5e5092fdbf-dirty #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
=====================================================

repro.c

// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <pthread.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/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/veth.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;
}

static void thread_start(void* (*fn)(void*), void* arg) {
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev) {
  ev->state = 0;
}

static void event_reset(event_t* ev) {
  ev->state = 0;
}

static void event_set(event_t* ev) {
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev) {
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev) {
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout) {
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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;
}

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg,
                         int typ,
                         int flags,
                         const void* data,
                         int size) {
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg,
                         int typ,
                         const void* data,
                         int size) {
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  if (size > 0)
    memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg,
                            int sock,
                            uint16_t reply_type,
                            int* reply_len,
                            bool dofail) {
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

static int netlink_query_family_id(struct nlmsg* nlmsg,
                                   int sock,
                                   const char* family_name,
                                   bool dofail) {
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static long syz_genetlink_get_family_id(volatile long name,
                                        volatile long sock_arg) {
  int fd = sock_arg;
  if (fd < 0) {
    fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
    if (fd == -1) {
      return -1;
    }
  }
  struct nlmsg nlmsg_tmp;
  int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, false);
  if ((int)sock_arg < 0)
    close(fd);
  if (ret < 0) {
    return -1;
  }
  return ret;
}

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");
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg) {
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void) {
  int i, call, thread;
  for (call = 0; call < 7; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call) {
  intptr_t res = 0;
  switch (call) {
    case 0:
      res = syscall(__NR_socket, /*domain=*/0x26ul, /*type=*/5ul, /*proto=*/0);
      if (res != -1)
        r[0] = res;
      break;
    case 1:
      *(uint16_t*)0x20000000 = 0x26;
      memcpy((void*)0x20000002, "skcipher\000\000\000\000\000\000", 14);
      *(uint32_t*)0x20000010 = 0;
      *(uint32_t*)0x20000014 = 0;
      memcpy((void*)0x20000018,
             "cts(cbc(des3_ede))"
             "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
             "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
             "\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
             64);
      syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x20000000ul,
              /*addrlen=*/0x58ul);
      break;
    case 2:
      memcpy((void*)0x20c18000,
             "\xad\x56\xb6\xc5\x82\x0f\xae\x9d\x6d\xcd\x32\x92\xea\x54\xc7\xbe"
             "\xef\x91\x5d\x56\x4c\x90\xc2\x00",
             24);
      syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x117, /*opt=*/1,
              /*key=*/0x20c18000ul, /*keylen=*/0x18ul);
      break;
    case 3:
      res = syscall(__NR_accept4, /*fd=*/r[0], /*peer=*/0ul, /*peerlen=*/0ul,
                    /*flags=*/0ul);
      if (res != -1)
        r[1] = res;
      break;
    case 4:
      memcpy((void*)0x20000100, "nl80211\000", 8);
      syz_genetlink_get_family_id(/*name=*/0x20000100, /*fd=*/r[1]);
      break;
    case 5:
      *(uint64_t*)0x200001c0 = 0;
      *(uint32_t*)0x200001c8 = 0;
      *(uint64_t*)0x200001d0 = 0x20000180;
      *(uint64_t*)0x20000180 = 0x20000140;
      *(uint32_t*)0x20000140 = 0x28;
      *(uint16_t*)0x20000144 = 0;
      *(uint16_t*)0x20000146 = 0;
      *(uint32_t*)0x20000148 = 0;
      *(uint32_t*)0x2000014c = 0;
      *(uint8_t*)0x20000150 = 0x35;
      *(uint8_t*)0x20000151 = 0;
      *(uint16_t*)0x20000152 = 0;
      *(uint16_t*)0x20000154 = 8;
      *(uint16_t*)0x20000156 = 3;
      *(uint32_t*)0x20000158 = 0;
      *(uint16_t*)0x2000015c = 0xc;
      *(uint16_t*)0x2000015e = 0x99;
      *(uint32_t*)0x20000160 = 0;
      *(uint32_t*)0x20000164 = 0;
      *(uint64_t*)0x20000188 = 0x28;
      *(uint64_t*)0x200001d8 = 1;
      *(uint64_t*)0x200001e0 = 0;
      *(uint64_t*)0x200001e8 = 0;
      *(uint32_t*)0x200001f0 = 0;
      syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200001c0ul, /*f=*/0x8000ul);
      break;
    case 6:
      *(uint64_t*)0x20003fc0 = 0;
      *(uint32_t*)0x20003fc8 = 0;
      *(uint64_t*)0x20003fd0 = 0x20000080;
      *(uint64_t*)0x20000080 = 0x20000380;
      memcpy((void*)0x20000380,
             "\x05\xe2\x7d\x49\x1f\xdb\x75\x96\x99\x7a\xf6\xa7", 12);
      *(uint64_t*)0x20000088 = 0xc;
      *(uint64_t*)0x20003fd8 = 1;
      *(uint64_t*)0x20003fe0 = 0;
      *(uint64_t*)0x20003fe8 = 0;
      *(uint32_t*)0x20003ff0 = 0;
      *(uint32_t*)0x20003ff8 = 0;
      syscall(__NR_sendmmsg, /*fd=*/r[1], /*mmsg=*/0x20003fc0ul, /*vlen=*/1ul,
              /*f=*/0ul);
      break;
  }
}
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;
}

repro.txt

r0 = socket$alg(0x26, 0x5, 0x0)
bind$alg(r0, &(0x7f0000000000)={0x26, 'skcipher\x00', 0x0, 0x0, 'cts(cbc(des3_ede))\x00'}, 0x58)
setsockopt$ALG_SET_KEY(r0, 0x117, 0x1, &(0x7f0000c18000)="ad56b6c5820fae9d6dcd3292ea54c7beef915d564c90c200", 0x18)
r1 = accept4(r0, 0x0, 0x0, 0x0)
syz_genetlink_get_family_id$nl80211(&(0x7f0000000100), r1)
sendmsg$NL80211_CMD_DEL_PMKSA(r1, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000140)={0x28, 0x0, 0x0, 0x0, 0x0, {{}, {@val={0x8}, @val={0xc}}}}, 0x28}}, 0x8000)
sendmmsg$unix(r1, &(0x7f0000003fc0)=[{{0x0, 0x0, &(0x7f0000000080)=[{&(0x7f0000000380)="05e27d491fdb7596997af6a7", 0xc}], 0x1}}], 0x1, 0x0)