report

TITLE: KMSAN: uninit-value in nci_rsp_packet
CORRUPTED: false ()
MAINTAINERS (TO): []
MAINTAINERS (CC): []

=====================================================
BUG: KMSAN: uninit-value in nci_core_init_rsp_packet_v2 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:107 [inline]
BUG: KMSAN: uninit-value in nci_core_init_rsp_packet home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:131 [inline]
BUG: KMSAN: uninit-value in nci_rsp_packet+0x2c0d/0x2c70 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:376
 nci_core_init_rsp_packet_v2 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:107 [inline]
 nci_core_init_rsp_packet home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:131 [inline]
 nci_rsp_packet+0x2c0d/0x2c70 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:376
 nci_rx_work+0x207/0x560 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/core.c:1518
 process_one_work home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x12bc/0x2060 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2706
 worker_thread+0x1062/0x1630 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2787
 kthread+0x422/0x5a0 home/dubbo/foobar/685805de-running/kernel/kernel/kthread.c:388
 ret_from_fork+0x7f/0xa0 home/dubbo/foobar/685805de-running/kernel/arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/entry_64.S:242
Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 home/dubbo/foobar/685805de-running/kernel/mm/slab.h:768
 slab_alloc_node home/dubbo/foobar/685805de-running/kernel/mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x5e9/0xb10 home/dubbo/foobar/685805de-running/kernel/mm/slub.c:3523
 kmalloc_reserve+0x14d/0x500 home/dubbo/foobar/685805de-running/kernel/net/core/skbuff.c:560
 __alloc_skb+0x34e/0x7d0 home/dubbo/foobar/685805de-running/kernel/net/core/skbuff.c:651
 alloc_skb home/dubbo/foobar/685805de-running/kernel/./include/linux/skbuff.h:1286 [inline]
 virtual_ncidev_write+0x78/0x2c0 home/dubbo/foobar/685805de-running/kernel/drivers/nfc/virtual_ncidev.c:120
 vfs_write+0x4d3/0x1330 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:588
 ksys_write+0x273/0x510 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:643
 __do_sys_write home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:655 [inline]
 __se_sys_write home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:652 [inline]
 __x64_sys_write+0x9e/0xe0 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:652
 do_syscall_x64 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
CPU: 1 PID: 11 Comm: kworker/u8:0 Not tainted 6.7.0-00562-g92
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 4
Workqueue: nfc2_nci_rx_wq nci_rx_work
=====================================================
TITLE: kernel panic: kmsan.panic set ...
CORRUPTED: false ()
MAINTAINERS (TO): []
MAINTAINERS (CC): []

 nci_core_init_rsp_packet_v2 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:107 [inline]
 nci_core_init_rsp_packet home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:131 [inline]
 nci_rsp_packet+0x2c0d/0x2c70 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:376
 nci_rx_work+0x207/0x560 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/core.c:1518
 process_one_work home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x12bc/0x2060 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2706
 worker_thread+0x1062/0x1630 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2787
 kthread+0x422/0x5a0 home/dubbo/foobar/685805de-running/kernel/kernel/kthread.c:388
 ret_from_fork+0x7f/0xa0 home/dubbo/foobar/685805de-running/kernel/arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/entry_64.S:242
Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 home/dubbo/foobar/685805de-running/kernel/mm/slab.h:768
 slab_alloc_node home/dubbo/foobar/685805de-running/kernel/mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x5e9/0xb10 home/dubbo/foobar/685805de-running/kernel/mm/slub.c:3523
 kmalloc_reserve+0x14d/0x500 home/dubbo/foobar/685805de-running/kernel/net/core/skbuff.c:560
 __alloc_skb+0x34e/0x7d0 home/dubbo/foobar/685805de-running/kernel/net/core/skbuff.c:651
 alloc_skb home/dubbo/foobar/685805de-running/kernel/./include/linux/skbuff.h:1286 [inline]
 virtual_ncidev_write+0x78/0x2c0 home/dubbo/foobar/685805de-running/kernel/drivers/nfc/virtual_ncidev.c:120
 vfs_write+0x4d3/0x1330 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:588
 ksys_write+0x273/0x510 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:643
 __do_sys_write home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:655 [inline]
 __se_sys_write home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:652 [inline]
 __x64_sys_write+0x9e/0xe0 home/dubbo/foobar/685805de-running/kernel/fs/read_write.c:652
 do_syscall_x64 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
CPU: 1 PID: 11 Comm: kworker/u8:0 Not tainted 6.7.0-00562-g92
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 4
Workqueue: nfc2_nci_rx_wq nci_rx_work
=====================================================
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: kmsan.panic set ...
CPU: 1 PID: 11 Comm: kworker/u8:0 Tainted: G    B           2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 4
Workqueue: nfc2_nci_rx_wq nci_rx_work
Call Trace:
 <TASK>
 __dump_stack home/dubbo/foobar/685805de-running/kernel/lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1f7/0x290 home/dubbo/foobar/685805de-running/kernel/lib/dump_stack.c:106
 dump_stack+0x29/0x30 home/dubbo/foobar/685805de-running/kernel/lib/dump_stack.c:113
 panic+0x506/0xd70 home/dubbo/foobar/685805de-running/kernel/kernel/panic.c:344
 kmsan_report+0x2d0/0x2d0 home/dubbo/foobar/685805de-running/kernel/mm/kmsan/report.c:216
 __msan_warning+0x96/0x110 home/dubbo/foobar/685805de-running/kernel/mm/kmsan/instrumentation.c:317
 nci_core_init_rsp_packet_v2 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:107 [inline]
 nci_core_init_rsp_packet home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:131 [inline]
 nci_rsp_packet+0x2c0d/0x2c70 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/rsp.c:376
 nci_rx_work+0x207/0x560 home/dubbo/foobar/685805de-running/kernel/net/nfc/nci/core.c:1518
 process_one_work home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x12bc/0x2060 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2706
 worker_thread+0x1062/0x1630 home/dubbo/foobar/685805de-running/kernel/kernel/workqueue.c:2787
 kthread+0x422/0x5a0 home/dubbo/foobar/685805de-running/kernel/kernel/kthread.c:388
 ret_from_fork+0x7f/0xa0 home/dubbo/foobar/685805de-running/kernel/arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 home/dubbo/foobar/685805de-running/kernel/arch/x86/entry/entry_64.S:242
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

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);
}

#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))))

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;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain,
                                volatile long type,
                                volatile long proto) {
  return syscall(__NR_socket, domain, type, proto);
}

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[4] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0};

void execute_call(int call) {
  intptr_t res = 0;
  switch (call) {
    case 0:
      memcpy((void*)0x20000080, "/dev/virtual_nci\000", 17);
      res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                    /*file=*/0x20000080ul, /*flags=*/2ul, /*mode=*/0ul);
      if (res != -1)
        r[0] = res;
      break;
    case 1:
      res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0, /*arg=*/0x200000c0ul);
      if (res != -1)
        r[1] = *(uint32_t*)0x200000c0;
      break;
    case 2:
      res = -1;
      res = syz_init_net_socket(/*domain=*/0x10, /*type=*/3, /*proto=*/0x10);
      if (res != -1)
        r[2] = res;
      break;
    case 3:
      memcpy((void*)0x20000100, "nfc\000", 4);
      res = -1;
      res = syz_genetlink_get_family_id(/*name=*/0x20000100, /*fd=*/r[2]);
      if (res != -1)
        r[3] = res;
      break;
    case 4:
      *(uint64_t*)0x20000140 = 0;
      *(uint32_t*)0x20000148 = 0;
      *(uint64_t*)0x20000150 = 0x20000180;
      *(uint64_t*)0x20000180 = 0x200001c0;
      *(uint32_t*)0x200001c0 = 0x1c;
      *(uint16_t*)0x200001c4 = r[3];
      *(uint16_t*)0x200001c6 = 1;
      *(uint32_t*)0x200001c8 = 0;
      *(uint32_t*)0x200001cc = 0;
      *(uint8_t*)0x200001d0 = 2;
      *(uint8_t*)0x200001d1 = 0;
      *(uint16_t*)0x200001d2 = 0;
      *(uint16_t*)0x200001d4 = 8;
      *(uint16_t*)0x200001d6 = 1;
      *(uint32_t*)0x200001d8 = r[1];
      *(uint64_t*)0x20000188 = 0x1c;
      *(uint64_t*)0x20000158 = 1;
      *(uint64_t*)0x20000160 = 0;
      *(uint64_t*)0x20000168 = 0;
      *(uint32_t*)0x20000170 = 0;
      syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x20000140ul, /*f=*/0ul);
      break;
    case 5:
      memcpy((void*)0x20000280, "\x40\x00\x00\x00\xe7", 5);
      syscall(__NR_write, /*fd=*/r[0], /*data=*/0x20000280ul, /*len=*/6ul);
      break;
    case 6:
      STORE_BY_BITMASK(uint8_t, , 0x20000a80, 0, 0, 4);
      STORE_BY_BITMASK(uint8_t, , 0x20000a80, 0, 4, 1);
      STORE_BY_BITMASK(uint8_t, , 0x20000a80, 2, 5, 3);
      *(uint8_t*)0x20000a81 = 1;
      *(uint8_t*)0x20000a82 = 0;
      *(uint8_t*)0x20000a83 = 0;
      *(uint32_t*)0x20000a84 = 0;
      *(uint8_t*)0x20000a88 = 0;
      *(uint8_t*)0x20000a89 = 0;
      *(uint16_t*)0x20000a8a = 0;
      *(uint8_t*)0x20000a8c = 0;
      *(uint16_t*)0x20000a8d = 0;
      *(uint8_t*)0x20000a8f = 0;
      *(uint32_t*)0x20000a90 = 9;
      syscall(__NR_write, /*fd=*/r[0], /*data=*/0x20000a80ul, /*len=*/0x14ul);
      break;
  }
}
int main(void) {
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  loop();
  return 0;
}

repro.txt

r0 = openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
ioctl$IOCTL_GET_NCIDEV_IDX(r0, 0x0, &(0x7f00000000c0)=<r1=>0x0)
r2 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$nfc(&(0x7f0000000100), r2)
sendmsg$NFC_CMD_DEV_UP(r2, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000180)={&(0x7f00000001c0)={0x1c, r3, 0x1, 0x0, 0x0, {}, [@NFC_ATTR_DEVICE_INDEX={0x8, 0x1, r1}]}, 0x1c}}, 0x0)
write$nci(r0, &(0x7f0000000280)=ANY=[@ANYBLOB="40000000e7"], 0x6)
write$nci(r0, &(0x7f0000000a80)=@NCI_OP_CORE_INIT_RSP={0x0, 0x0, 0x2, 0x1, 0x0, {{}, {0x0, 0x0, 0x0, 0x0, 0x0, 0x9}}}, 0x14)