The patch titled
Subject: autofs: don't get stuck in a loop if vfs_write() returns an error
has been added to the -mm tree. Its filename is
autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error.patch
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------------------------------------------------------
From: Andrey Vagin <avagin@xxxxxxxxxx>
Subject: autofs: don't get stuck in a loop if vfs_write() returns an error
__vfs_write() returns a negative value in a error case.
Link: http://lkml.kernel.org/r/20160616083108.6278.65815.stgit@xxxxxxxxxxxxxxxx
Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx>
Signed-off-by: Ian Kent <raven@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/autofs4/waitq.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN fs/autofs4/waitq.c~autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error fs/autofs4/waitq.c
--- a/fs/autofs4/waitq.c~autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error
+++ a/fs/autofs4/waitq.c
@@ -66,11 +66,12 @@ static int autofs4_write(struct autofs_s
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);
_
Patches currently in -mm which might be from avagin@xxxxxxxxxx are
autofs-dont-stuck-in-a-loop-if-vfs_write-returns-an-error.patch
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