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io_uring: fix fdinfo sqe offsets calculation 

commit 00927931cb upstream.

Only with the big sqe feature they take 128 bytes per entry, but we
unconditionally advance by 128B. Fix it by using sq_shift.

Fixes: 3b8fdd1dc3 ("io_uring/fdinfo: fix sqe dumping for IORING_SETUP_SQE128")
Reported-and-tested-by: syzbot+e5198737e8a2d23d958c@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8b41287cb75d5efb8fcb5cccde845ddbbadd8372.1665449983.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Begunkov 2022-10-11 01:59:57 +01:00 committed by Greg Kroah-Hartman
parent 82d23c7f87
commit 5ecafa5a58
1 changed files with 1 additions and 1 deletions
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2
io_uring/fdinfo.c
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@ -95,7 +95,7 @@ static __cold void __io_uring_show_fdinfo(struct io_ring_ctx *ctx,
sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]);
if (sq_idx > sq_mask)
continue;
sqe = &ctx->sq_sqes[sq_idx << 1];
sqe = &ctx->sq_sqes[sq_idx << sq_shift];
seq_printf(m, "%5u: opcode:%s, fd:%d, flags:%x, off:%llu, "
"addr:0x%llx, rw_flags:0x%x, buf_index:%d "
"user_data:%llu",