• Konstantin Khlebnikov's avatar
    ovl: free lower_mnt array in ovl_put_super · 5c418f1b
    Konstantin Khlebnikov authored
    commit 5ffdbe8b upstream.
    
    This fixes memory leak after umount.
    
    Kmemleak report:
    
    unreferenced object 0xffff8800ba791010 (size 8):
      comm "mount", pid 2394, jiffies 4294996294 (age 53.920s)
      hex dump (first 8 bytes):
        20 1c 13 02 00 88 ff ff                           .......
      backtrace:
        [<ffffffff811f8cd4>] create_object+0x124/0x2c0
        [<ffffffff817a059b>] kmemleak_alloc+0x7b/0xc0
        [<ffffffff811dffe6>] __kmalloc+0x106/0x340
        [<ffffffffa0152bfc>] ovl_fill_super+0x55c/0x9b0 [overlay]
        [<ffffffff81200ac4>] mount_nodev+0x54/0xa0
        [<ffffffffa0152118>] ovl_mount+0x18/0x20 [overlay]
        [<ffffffff81201ab3>] mount_fs+0x43/0x170
        [<ffffffff81220d34>] vfs_kern_mount+0x74/0x170
        [<ffffffff812233ad>] do_mount+0x22d/0xdf0
        [<ffffffff812242cb>] SyS_mount+0x7b/0xc0
        [<ffffffff817b6bee>] entry_SYSCALL_64_fastpath+0x12/0x76
        [<ffffffffffffffff>] 0xffffffffffffffff
    Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
    Signed-off-by: default avatarMiklos Szeredi <miklos@szeredi.hu>
    Fixes: dd662667 ("ovl: add mutli-layer infrastructure")
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    5c418f1b
super.c 22.1 KB