Kernel bug: memory leak in iovec_from_user (2)
Subsystem: io-uring
Status: fixed

Crash report:
BUG: memory leak
unreferenced object 0xffff88812638cc20 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88812638cc40 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88812638cc60 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88812638cc80 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88812638cca0 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88812638ccc0 (size 32):
  comm "syz.0.17", pid 6104, jiffies 4294942640
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 0):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4975 [inline]
    slab_alloc_node mm/slub.c:5280 [inline]
    __do_kmalloc_node mm/slub.c:5641 [inline]
    __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5654
    kmalloc_noprof include/linux/slab.h:961 [inline]
    kmalloc_array_noprof include/linux/slab.h:1003 [inline]
    iovec_from_user lib/iov_iter.c:1309 [inline]
    iovec_from_user+0x108/0x140 lib/iov_iter.c:1292
    __import_iovec+0x71/0x350 lib/iov_iter.c:1363
    io_import_vec io_uring/rw.c:99 [inline]
    __io_import_rw_buffer+0x1e2/0x260 io_uring/rw.c:120
    io_import_rw_buffer io_uring/rw.c:139 [inline]
    io_rw_do_import io_uring/rw.c:314 [inline]
    io_prep_rw+0xb5/0x120 io_uring/rw.c:326
    io_prep_rwv io_uring/rw.c:344 [inline]
    io_prep_readv+0x20/0x80 io_uring/rw.c:359
    io_init_req io_uring/io_uring.c:2248 [inline]
    io_submit_sqe io_uring/io_uring.c:2295 [inline]
    io_submit_sqes+0x354/0xe80 io_uring/io_uring.c:2447
    __do_sys_io_uring_enter+0x83f/0xcf0 io_uring/io_uring.c:3514
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF