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io_uring: fix invalid error check after malloc

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Now we allocate io_mapped_ubuf instead of bvec, so we clearly have to
check its address after allocation.

Fixes: 41edf1a5ec ("io_uring: keep table of pointers to ubufs")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d28eb1bc4384284f69dbce35b9f70c115ff6176f.1619392565.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-04-26 00:16:31 +01:00 committed by Jens Axboe
parent a2a7cc32a5
commit a2b4198cab
1 changed files with 1 additions and 1 deletions
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2
fs/io_uring.c
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@ -8265,7 +8265,7 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
goto done; goto done;
imu = kvmalloc(struct_size(imu, bvec, nr_pages), GFP_KERNEL); imu = kvmalloc(struct_size(imu, bvec, nr_pages), GFP_KERNEL);
if (!imu->bvec) if (!imu)
goto done; goto done;
ret = 0; ret = 0;