From: Jens Axboe axboe@kernel.dk
commit 4ed734b0d0913e566a9d871e15d24eb240f269f7 upstream.
With the previous fixes for number of files open checking, I added some debug code to see if we had other spots where we're checking rlimit() against the async io-wq workers. The only one I found was file size checking, which we should also honor.
During write and fallocate prep, store the max file size and override that for the current ask if we're in io-wq worker context.
Cc: stable@vger.kernel.org # 5.1+ Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/io_uring.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
--- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -432,6 +432,7 @@ struct io_kiocb { #define REQ_F_INFLIGHT 16384 /* on inflight list */ #define REQ_F_COMP_LOCKED 32768 /* completion under lock */ #define REQ_F_HARDLINK 65536 /* doesn't sever on completion < 0 */ + unsigned long fsize; u64 user_data; u32 result; u32 sequence; @@ -1899,6 +1900,8 @@ static int io_write_prep(struct io_kiocb if (unlikely(!(req->file->f_mode & FMODE_WRITE))) return -EBADF;
+ req->fsize = rlimit(RLIMIT_FSIZE); + if (!req->io) return 0;
@@ -1970,10 +1973,17 @@ static int io_write(struct io_kiocb *req } kiocb->ki_flags |= IOCB_WRITE;
+ if (!force_nonblock) + current->signal->rlim[RLIMIT_FSIZE].rlim_cur = req->fsize; + if (req->file->f_op->write_iter) ret2 = call_write_iter(req->file, kiocb, &iter); else ret2 = loop_rw_iter(WRITE, req->file, kiocb, &iter); + + if (!force_nonblock) + current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY; + /* * Raw bdev writes will -EOPNOTSUPP for IOCB_NOWAIT. Just * retry them without IOCB_NOWAIT.