Commit 32f5dea0 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring/fdinfo: only print ->sq_array[] if it's there 



If a ring is setup with IORING_SETUP_NO_SQARRAY, then we don't have
the SQ array. Don't try to dump info from it through fdinfo if that
is the case.

Reported-by: default avatar <syzbot+216e2ea6e0bf4a0acdd7@syzkaller.appspotmail.com>
Fixes: 2af89abd ("io_uring: add option to remove SQ indirection")
Reviewed-by: default avatarGabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent b484a40d

io_uring/fdinfo.c

+2 −0
Original line number Diff line number Diff line
@@ -93,6 +93,8 @@ __cold void io_uring_show_fdinfo(struct seq_file *m, struct file *f) 
		struct io_uring_sqe *sqe;

		unsigned int sq_idx;



		if (ctx->flags & IORING_SETUP_NO_SQARRAY)

			break;

		sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]);

		if (sq_idx > sq_mask)

			continue;