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    procfs: Use generic_file_llseek in /proc/vmcore · 73296bc6
    Frederic Weisbecker 提交于
    /proc/vmcore has no llseek and then falls down to use default_llseek.
    This is racy against read_vmcore() that directly manipulates fpos
    but it doesn't hold the bkl there so using it in llseek doesn't
    protect anything.
    
    Let's use generic_file_llseek() instead.
    Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
    Acked-by: NArnd Bergmann <arnd@arndb.de>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: John Kacur <jkacur@redhat.com>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Cc: Al Viro <viro@ZenIV.linux.org.uk>
    73296bc6
vmcore.c 16.1 KB