seq_open() store its struct seq_file in file->private_data, thus, it must not be modified by user of seq_file.
Link: http://lkml.kernel.org/r/cover.1433193673.git.ydrone...@opteya.com Signed-off-by: Yann Droneaud <ydrone...@opteya.com> --- fs/seq_file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/seq_file.c b/fs/seq_file.c index a909f12dad4d..e48ef5682bfa 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -48,6 +48,8 @@ static void *seq_buf_alloc(unsigned long size) * ERR_PTR(error). In the end of sequence they return %NULL. ->show() * returns 0 in case of success and negative number in case of error. * Returning SEQ_SKIP means "discard this element and move on". + * Note: seq_open() will allocate a struct seq_file and store its + * pointer in @file->private_data. This pointer should not be modified. */ int seq_open(struct file *file, const struct seq_operations *op) { -- 2.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
