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autofs: don't get stuck in a loop if vfs_write() returns an error
author
Andrey Vagin
<avagin@openvz.org>
Fri, 24 Jun 2016 21:50:27 +0000
(14:50 -0700)
committer
Linus Torvalds
<torvalds@linux-foundation.org>
Sat, 25 Jun 2016 00:23:52 +0000
(17:23 -0700)
__vfs_write() returns a negative value in a error case.
Link:
http://lkml.kernel.org/r/20160616083108.6278.65815.stgit@pluto.themaw.net
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/autofs4/waitq.c
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diff --git
a/fs/autofs4/waitq.c
b/fs/autofs4/waitq.c
index 0146d911f468ca46d5fe7c946851c500b624ccb9..631f1554c87b7d73b9afc7834392ce6e279c7d6d 100644
(file)
--- 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);