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

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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: syzbot+216e2ea6e0bf4a0acdd7@syzkaller.appspotmail.com
Fixes: 2af89abda7 ("io_uring: add option to remove SQ indirection")
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-09-01 13:59:19 -06:00
parent b484a40dc1
commit 32f5dea040
1 changed files with 2 additions and 0 deletions
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2
io_uring/fdinfo.c
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@ -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;