Messages in this thread Patch in this message | | | Subject | [PATCH] autofs: don't stuck in a loop if vfs_write returns an error | From | Ian Kent <> | Date | Thu, 16 Jun 2016 16:31:08 +0800 |
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From: Andrey Vagin <avagin@openvz.org>
__vfs_write() returns a negative value in a error case.
Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: Ian Kent <raven@themaw.net> --- fs/autofs4/waitq.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 0146d91..631f155 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -66,11 +66,12 @@ static int autofs4_write(struct autofs_sb_info *sbi, set_fs(KERNEL_DS); mutex_lock(&sbi->pipe_mutex); - wr = __vfs_write(file, data, bytes, &file->f_pos); - while (bytes && wr) { + while (bytes) { + wr = __vfs_write(file, data, bytes, &file->f_pos); + if (wr <= 0) + break; data += wr; bytes -= wr; - wr = __vfs_write(file, data, bytes, &file->f_pos); } mutex_unlock(&sbi->pipe_mutex);
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