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io_uring/fdinfo: fix SQE_MIXED SQE displaying 

When displaying pending SQEs for a MIXED ring, each 128-byte SQE
increments sq_head to skip the second slot, but the loop counter is not
adjusted. This can cause the loop to read past sq_tail by one entry for
each 128-byte SQE encountered, displaying SQEs that haven't been made
consumable yet by the application.

Match the kernel's own consumption logic in io_init_req() which
decrements what's left when consuming the extra slot.

Fixes: 1cba30bf9f ("io_uring: add support for IORING_SETUP_SQE_MIXED")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2026-03-26 07:02:53 -06:00
parent 418eab7a6f
commit b59efde9e6
1 changed files with 1 additions and 0 deletions
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io_uring/fdinfo.c
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@ -125,6 +125,7 @@ static void __io_uring_show_fdinfo(struct io_ring_ctx *ctx, struct seq_file *m)
sq_idx);
break;
}
i++;
sqe128 = true;
}
seq_printf(m, "%5u: opcode:%s, fd:%d, flags:%x, off:%llu, "