Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH -tip 3/3] locking/pvqspinlock: Robustify init_qspinlock_stat() | Date | Sun, 17 Apr 2016 23:31:43 -0700 |
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Specifically around the debugfs file creation calls, I have no idea if they could ever possibly fail, but this is core code (debug aside) so lets at least check the return value and inform anything fishy.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- kernel/locking/qspinlock_stat.h | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/kernel/locking/qspinlock_stat.h b/kernel/locking/qspinlock_stat.h index 72722334237a..ddcd653c942c 100644 --- a/kernel/locking/qspinlock_stat.h +++ b/kernel/locking/qspinlock_stat.h @@ -225,12 +225,18 @@ static int __init init_qspinlock_stat(void) * performance. */ for (i = 0; i < qstat_num; i++) - debugfs_create_file(qstat_names[i], 0400, d_qstat, - (void *)(long)i, &fops_qstat); + if (!debugfs_create_file(qstat_names[i], 0400, d_qstat, + (void *)(long)i, &fops_qstat)) + goto fail; + + if (!debugfs_create_file(qstat_names[qstat_reset_cnts], 0200, d_qstat, + (void *)(long)qstat_reset_cnts, &fops_qstat)) + goto fail; - debugfs_create_file(qstat_names[qstat_reset_cnts], 0200, d_qstat, - (void *)(long)qstat_reset_cnts, &fops_qstat); return 0; +fail: + debugfs_remove_recursive(d_qstat); + return 1; } fs_initcall(init_qspinlock_stat); -- 2.8.1
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