Should check return value of debugfs_create_dir(), the d_mmu_debug pointer before using it in function xen_p2m_debugfs().
Signed-off-by: ethan.zhao <[email protected]> --- arch/x86/xen/p2m.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index a61c7d5..ac17f99 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -1172,8 +1172,13 @@ static int __init xen_p2m_debugfs(void) return -ENOMEM; d_mmu_debug = debugfs_create_dir("mmu", d_xen); + if (!d_mmu_debug) + return -ENOENT; + + if (!debugfs_create_file("p2m", + 0600, d_mmu_debug, NULL, &p2m_dump_fops)) + return -ENOENT; - debugfs_create_file("p2m", 0600, d_mmu_debug, NULL, &p2m_dump_fops); return 0; } fs_initcall(xen_p2m_debugfs); -- 1.8.3.4 (Apple Git-47) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
