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io_uring: fix fdinfo sqe offsets calculation

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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>
This commit is contained in:
Pavel Begunkov 2022-10-11 01:59:57 +01:00 committed by Jens Axboe
parent c86416c6ff
commit 00927931cb
1 changed files with 1 additions and 1 deletions
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2
io_uring/fdinfo.c
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@ -94,7 +94,7 @@ static __cold void __io_uring_show_fdinfo(struct io_ring_ctx *ctx,
sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]); sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]);
if (sq_idx > sq_mask) if (sq_idx > sq_mask)
continue; 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, " seq_printf(m, "%5u: opcode:%s, fd:%d, flags:%x, off:%llu, "
"addr:0x%llx, rw_flags:0x%x, buf_index:%d " "addr:0x%llx, rw_flags:0x%x, buf_index:%d "
"user_data:%llu", "user_data:%llu",