diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2025-05-04 20:50:09 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2025-05-04 21:00:14 +0300 |
| commit | df2e19a883fdea698cdbed4987987db999b19d58 (patch) | |
| tree | 0b0d271c42edd1a3efd962bc44727eff86afffaf | |
| parent | 6846100b00d97d3d6f05766ae86a0d821d849e78 (diff) | |
| download | linux-df2e19a883fdea698cdbed4987987db999b19d58.tar.xz | |
bcachefs: thread_with_stdio: fix spinning instead of exiting
bch2_stdio_redirect_vprintf() was missing a check for stdio->done, i.e.
exiting.
This caused the thread attempting to print to spin, and since it was
being called from the kthread ran by thread_with_stdio, the userspace
side hung as well.
Change it to return -EPIPE - i.e. writing to a pipe that's been closed.
Reported-by: Jan Solanti <jhs@psonet.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/bcachefs/thread_with_file.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/bcachefs/thread_with_file.c b/fs/bcachefs/thread_with_file.c index dea73bc1cb51..314a24d15d4e 100644 --- a/fs/bcachefs/thread_with_file.c +++ b/fs/bcachefs/thread_with_file.c @@ -455,8 +455,10 @@ ssize_t bch2_stdio_redirect_vprintf(struct stdio_redirect *stdio, bool nonblocki struct stdio_buf *buf = &stdio->output; unsigned long flags; ssize_t ret; - again: + if (stdio->done) + return -EPIPE; + spin_lock_irqsave(&buf->lock, flags); ret = bch2_darray_vprintf(&buf->buf, GFP_NOWAIT, fmt, args); spin_unlock_irqrestore(&buf->lock, flags); |