* Re: [PATCH v2 2/2] blk-mq: fix potential uaf for 'queue_hw_ctx'
[not found] <20251127013908.66118-3-fengnanchang@gmail.com>
@ 2025-11-27 18:46 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-11-27 18:46 UTC (permalink / raw)
To: Fengnan Chang, axboe, linux-block, ming.lei, hare, hch, yukuai3
Cc: llvm, oe-kbuild-all, Fengnan Chang
Hi Fengnan,
kernel test robot noticed the following build errors:
[auto build test ERROR on 4941a17751c99e17422be743c02c923ad706f888]
url: https://github.com/intel-lab-lkp/linux/commits/Fengnan-Chang/blk-mq-use-array-manage-hctx-map-instead-of-xarray/20251127-094243
base: 4941a17751c99e17422be743c02c923ad706f888
patch link: https://lore.kernel.org/r/20251127013908.66118-3-fengnanchang%40gmail.com
patch subject: [PATCH v2 2/2] blk-mq: fix potential uaf for 'queue_hw_ctx'
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20251128/202511280210.BjxdaKJc-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251128/202511280210.BjxdaKJc-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511280210.BjxdaKJc-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/block/rnbd/rnbd-clt.c:1324:2: error: call to undeclared function 'queue_hctx'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1324 | queue_for_each_hw_ctx(dev->queue, hctx, i) {
| ^
include/linux/blk-mq.h:1004:17: note: expanded from macro 'queue_for_each_hw_ctx'
1004 | ({ hctx = queue_hctx((q), i); 1; }); (i)++)
| ^
>> drivers/block/rnbd/rnbd-clt.c:1324:2: error: incompatible integer to pointer conversion assigning to 'struct blk_mq_hw_ctx *' from 'int' [-Wint-conversion]
1324 | queue_for_each_hw_ctx(dev->queue, hctx, i) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/blk-mq.h:1004:15: note: expanded from macro 'queue_for_each_hw_ctx'
1004 | ({ hctx = queue_hctx((q), i); 1; }); (i)++)
| ^ ~~~~~~~~~~~~~~~~~~
2 errors generated.
vim +/queue_hctx +1324 drivers/block/rnbd/rnbd-clt.c
f7a7a5c228d45e Jack Wang 2020-05-11 1317
f7a7a5c228d45e Jack Wang 2020-05-11 1318 static void rnbd_init_mq_hw_queues(struct rnbd_clt_dev *dev)
f7a7a5c228d45e Jack Wang 2020-05-11 1319 {
4f481208749a22 Ming Lei 2022-03-08 1320 unsigned long i;
f7a7a5c228d45e Jack Wang 2020-05-11 1321 struct blk_mq_hw_ctx *hctx;
f7a7a5c228d45e Jack Wang 2020-05-11 1322 struct rnbd_queue *q;
f7a7a5c228d45e Jack Wang 2020-05-11 1323
f7a7a5c228d45e Jack Wang 2020-05-11 @1324 queue_for_each_hw_ctx(dev->queue, hctx, i) {
f7a7a5c228d45e Jack Wang 2020-05-11 1325 q = &dev->hw_queues[i];
f7a7a5c228d45e Jack Wang 2020-05-11 1326 rnbd_init_hw_queue(dev, q, hctx);
f7a7a5c228d45e Jack Wang 2020-05-11 1327 hctx->driver_data = q;
f7a7a5c228d45e Jack Wang 2020-05-11 1328 }
f7a7a5c228d45e Jack Wang 2020-05-11 1329 }
f7a7a5c228d45e Jack Wang 2020-05-11 1330
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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