• Cong Wang's avatar
    atm: fix a memory leak of vcc->user_back · 8d9f73c0
    Cong Wang authored
    In lec_arp_clear_vccs() only entry->vcc is freed, but vcc
    could be installed on entry->recv_vcc too in lec_vcc_added().
    
    This fixes the following memory leak:
    
    unreferenced object 0xffff8880d9266b90 (size 16):
      comm "atm2", pid 425, jiffies 4294907980 (age 23.488s)
      hex dump (first 16 bytes):
        00 00 00 00 00 00 00 00 00 00 00 00 6b 6b 6b a5  ............kkk.
      backtrace:
        [<(____ptrval____)>] kmem_cache_alloc_trace+0x10e/0x151
        [<(____ptrval____)>] lane_ioctl+0x4b3/0x569
        [<(____ptrval____)>] do_vcc_ioctl+0x1ea/0x236
        [<(____ptrval____)>] svc_ioctl+0x17d/0x198
        [<(____ptrval____)>] sock_do_ioctl+0x47/0x12f
        [<(____ptrval____)>] sock_ioctl+0x2f9/0x322
        [<(____ptrval____)>] vfs_ioctl+0x1e/0x2b
        [<(____ptrval____)>] ksys_ioctl+0x61/0x80
        [<(____ptrval____)>] __x64_sys_ioctl+0x16/0x19
        [<(____ptrval____)>] do_syscall_64+0x57/0x65
        [<(____ptrval____)>] entry_SYSCALL_64_after_hwframe+0x49/0xb3
    
    Cc: Gengming Liu <l.dmxcsnsbh@gmail.com>
    Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    8d9f73c0
lec.c 58.3 KB