* [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
@ 2026-05-09 13:19 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: kernel test robot @ 2026-05-09 12:56 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: e98d21c170b01ddef366f023bbfcf6b31509fa83
commit: 1a83d226268cfb9ea546febe6515f39584df8fd2 [4172/4394] loop: check refcount in __loop_clr_fd() and lo_rw_aio()
:::::: branch date: 24 hours ago
:::::: commit date: 2 days ago
config: m68k-randconfig-r073-20260509 (https://download.01.org/0day-ci/archive/20260509/202605092030.FAH71Jou-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.5.0
smatch: v0.5.0-9065-ge9cc34fd
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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202605092030.FAH71Jou-lkp@intel.com/
New smatch warnings:
drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
Old smatch warnings:
drivers/block/loop.c:676 loop_attr_backing_file_show() warn: passing zero to 'PTR_ERR'
vim +/file +413 drivers/block/loop.c
bc07c10a3603a5 Ming Lei 2015-08-17 339
96f03c8cb29f2e Jens Axboe 2025-11-24 340 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
96f03c8cb29f2e Jens Axboe 2025-11-24 341 loff_t pos, int rw)
c3e6c11147f6f0 Ming Lei 2025-10-15 342 {
96f03c8cb29f2e Jens Axboe 2025-11-24 343 struct iov_iter iter;
c3e6c11147f6f0 Ming Lei 2025-10-15 344 struct req_iterator rq_iter;
96f03c8cb29f2e Jens Axboe 2025-11-24 345 struct bio_vec *bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 346 struct request *rq = blk_mq_rq_from_pdu(cmd);
96f03c8cb29f2e Jens Axboe 2025-11-24 347 struct bio *bio = rq->bio;
96f03c8cb29f2e Jens Axboe 2025-11-24 348 struct file *file = lo->lo_backing_file;
c3e6c11147f6f0 Ming Lei 2025-10-15 349 struct bio_vec tmp;
96f03c8cb29f2e Jens Axboe 2025-11-24 350 unsigned int offset;
71075d25ca5cae Chaitanya Kulkarni 2025-12-02 351 unsigned int nr_bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 352 int ret;
c3e6c11147f6f0 Ming Lei 2025-10-15 353
71075d25ca5cae Chaitanya Kulkarni 2025-12-02 354 nr_bvec = blk_rq_nr_bvec(rq);
c3e6c11147f6f0 Ming Lei 2025-10-15 355
40326d8a33d5b7 Shaohua Li 2017-08-31 356 if (rq->bio != rq->biotail) {
bc07c10a3603a5 Ming Lei 2015-08-17 357
69050f8d6d075d Kees Cook 2026-02-20 358 bvec = kmalloc_objs(struct bio_vec, nr_bvec, GFP_NOIO);
40326d8a33d5b7 Shaohua Li 2017-08-31 359 if (!bvec)
40326d8a33d5b7 Shaohua Li 2017-08-31 360 return -EIO;
40326d8a33d5b7 Shaohua Li 2017-08-31 361 cmd->bvec = bvec;
40326d8a33d5b7 Shaohua Li 2017-08-31 362
40326d8a33d5b7 Shaohua Li 2017-08-31 363 /*
40326d8a33d5b7 Shaohua Li 2017-08-31 364 * The bios of the request may be started from the middle of
40326d8a33d5b7 Shaohua Li 2017-08-31 365 * the 'bvec' because of bio splitting, so we can't directly
86af5952a8470f Ming Lei 2019-02-15 366 * copy bio->bi_iov_vec to new bvec. The rq_for_each_bvec
40326d8a33d5b7 Shaohua Li 2017-08-31 367 * API will take care of all details for us.
40326d8a33d5b7 Shaohua Li 2017-08-31 368 */
86af5952a8470f Ming Lei 2019-02-15 369 rq_for_each_bvec(tmp, rq, rq_iter) {
40326d8a33d5b7 Shaohua Li 2017-08-31 370 *bvec = tmp;
40326d8a33d5b7 Shaohua Li 2017-08-31 371 bvec++;
40326d8a33d5b7 Shaohua Li 2017-08-31 372 }
96f03c8cb29f2e Jens Axboe 2025-11-24 373 bvec = cmd->bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 374 offset = 0;
fd858d1ca9694c Ming Lei 2025-10-15 375 } else {
96f03c8cb29f2e Jens Axboe 2025-11-24 376 /*
96f03c8cb29f2e Jens Axboe 2025-11-24 377 * Same here, this bio may be started from the middle of the
96f03c8cb29f2e Jens Axboe 2025-11-24 378 * 'bvec' because of bio splitting, so offset from the bvec
96f03c8cb29f2e Jens Axboe 2025-11-24 379 * must be passed to iov iterator
96f03c8cb29f2e Jens Axboe 2025-11-24 380 */
96f03c8cb29f2e Jens Axboe 2025-11-24 381 offset = bio->bi_iter.bi_bvec_done;
96f03c8cb29f2e Jens Axboe 2025-11-24 382 bvec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);
fd858d1ca9694c Ming Lei 2025-10-15 383 }
96f03c8cb29f2e Jens Axboe 2025-11-24 384 atomic_set(&cmd->ref, 2);
96f03c8cb29f2e Jens Axboe 2025-11-24 385
96f03c8cb29f2e Jens Axboe 2025-11-24 386 iov_iter_bvec(&iter, rw, bvec, nr_bvec, blk_rq_bytes(rq));
96f03c8cb29f2e Jens Axboe 2025-11-24 387 iter.iov_offset = offset;
fd858d1ca9694c Ming Lei 2025-10-15 388
fd858d1ca9694c Ming Lei 2025-10-15 389 cmd->iocb.ki_pos = pos;
96f03c8cb29f2e Jens Axboe 2025-11-24 390 cmd->iocb.ki_filp = file;
fd858d1ca9694c Ming Lei 2025-10-15 391 cmd->iocb.ki_ioprio = req_get_ioprio(rq);
fd858d1ca9694c Ming Lei 2025-10-15 392 if (cmd->use_aio) {
fd858d1ca9694c Ming Lei 2025-10-15 393 cmd->iocb.ki_complete = lo_rw_aio_complete;
fd858d1ca9694c Ming Lei 2025-10-15 394 cmd->iocb.ki_flags = IOCB_DIRECT;
fd858d1ca9694c Ming Lei 2025-10-15 395 } else {
fd858d1ca9694c Ming Lei 2025-10-15 396 cmd->iocb.ki_complete = NULL;
fd858d1ca9694c Ming Lei 2025-10-15 397 cmd->iocb.ki_flags = 0;
fd858d1ca9694c Ming Lei 2025-10-15 398 }
bc07c10a3603a5 Ming Lei 2015-08-17 399
1a83d226268cfb Tetsuo Handa 2026-05-08 @400 if (!file)
1a83d226268cfb Tetsuo Handa 2026-05-08 401 pr_err("%s(loop%d) starting %s with NULL file (already cleared?)\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 402 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read");
1a83d226268cfb Tetsuo Handa 2026-05-08 403 else if (!file_count(file))
1a83d226268cfb Tetsuo Handa 2026-05-08 404 pr_err("%s(loop%d) starting %s with raw_refcnt=0x%lx (already released?)\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 405 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read",
1a83d226268cfb Tetsuo Handa 2026-05-08 406 __file_ref_read_raw(&file->f_ref));
1a83d226268cfb Tetsuo Handa 2026-05-08 407 else if (IS_ENABLED(CONFIG_DEBUG_AID_FOR_SYZBOT))
1a83d226268cfb Tetsuo Handa 2026-05-08 408 pr_info("%s(loop%d) starting %s with raw_refcnt=0x%lx, refcnt=%lu\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 409 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read",
1a83d226268cfb Tetsuo Handa 2026-05-08 410 __file_ref_read_raw(&file->f_ref), file_count(file));
39d86db34e41b9 Ming Lei 2025-05-27 411 if (rw == ITER_SOURCE) {
c4706c5058a7bd Ming Lei 2025-07-16 412 kiocb_start_write(&cmd->iocb);
7c98f7cb8fda96 Miklos Szeredi 2023-08-28 @413 ret = file->f_op->write_iter(&cmd->iocb, &iter);
39d86db34e41b9 Ming Lei 2025-05-27 414 } else
7c98f7cb8fda96 Miklos Szeredi 2023-08-28 415 ret = file->f_op->read_iter(&cmd->iocb, &iter);
bc07c10a3603a5 Ming Lei 2015-08-17 416
92d773324b7edb Shaohua Li 2017-09-01 417 lo_rw_aio_do_completion(cmd);
92d773324b7edb Shaohua Li 2017-09-01 418
bc07c10a3603a5 Ming Lei 2015-08-17 419 if (ret != -EIOCBQUEUED)
6b19b766e8f077 Jens Axboe 2021-10-21 420 lo_rw_aio_complete(&cmd->iocb, ret);
f2fed441c69b92 Christoph Hellwig 2025-04-09 421 return -EIOCBQUEUED;
bc07c10a3603a5 Ming Lei 2015-08-17 422 }
bc07c10a3603a5 Ming Lei 2015-08-17 423
:::::: The code at line 413 was first introduced by commit
:::::: 7c98f7cb8fda964fbc60b9307ad35e94735fa35f remove call_{read,write}_iter() functions
:::::: TO: Miklos Szeredi <mszeredi@redhat.com>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread* [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
@ 2026-05-09 13:19 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2026-05-09 13:19 UTC (permalink / raw)
To: oe-kbuild, Tetsuo Handa; +Cc: lkp, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: e98d21c170b01ddef366f023bbfcf6b31509fa83
commit: 1a83d226268cfb9ea546febe6515f39584df8fd2 [4172/4394] loop: check refcount in __loop_clr_fd() and lo_rw_aio()
config: m68k-randconfig-r073-20260509 (https://download.01.org/0day-ci/archive/20260509/202605092030.FAH71Jou-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.5.0
smatch: v0.5.0-9065-ge9cc34fd
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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202605092030.FAH71Jou-lkp@intel.com/
New smatch warnings:
drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
vim +/file +413 drivers/block/loop.c
96f03c8cb29f2e Jens Axboe 2025-11-24 340 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
96f03c8cb29f2e Jens Axboe 2025-11-24 341 loff_t pos, int rw)
c3e6c11147f6f0 Ming Lei 2025-10-15 342 {
96f03c8cb29f2e Jens Axboe 2025-11-24 343 struct iov_iter iter;
c3e6c11147f6f0 Ming Lei 2025-10-15 344 struct req_iterator rq_iter;
96f03c8cb29f2e Jens Axboe 2025-11-24 345 struct bio_vec *bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 346 struct request *rq = blk_mq_rq_from_pdu(cmd);
96f03c8cb29f2e Jens Axboe 2025-11-24 347 struct bio *bio = rq->bio;
96f03c8cb29f2e Jens Axboe 2025-11-24 348 struct file *file = lo->lo_backing_file;
c3e6c11147f6f0 Ming Lei 2025-10-15 349 struct bio_vec tmp;
96f03c8cb29f2e Jens Axboe 2025-11-24 350 unsigned int offset;
71075d25ca5cae Chaitanya Kulkarni 2025-12-02 351 unsigned int nr_bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 352 int ret;
c3e6c11147f6f0 Ming Lei 2025-10-15 353
71075d25ca5cae Chaitanya Kulkarni 2025-12-02 354 nr_bvec = blk_rq_nr_bvec(rq);
c3e6c11147f6f0 Ming Lei 2025-10-15 355
40326d8a33d5b7 Shaohua Li 2017-08-31 356 if (rq->bio != rq->biotail) {
bc07c10a3603a5 Ming Lei 2015-08-17 357
69050f8d6d075d Kees Cook 2026-02-20 358 bvec = kmalloc_objs(struct bio_vec, nr_bvec, GFP_NOIO);
40326d8a33d5b7 Shaohua Li 2017-08-31 359 if (!bvec)
40326d8a33d5b7 Shaohua Li 2017-08-31 360 return -EIO;
40326d8a33d5b7 Shaohua Li 2017-08-31 361 cmd->bvec = bvec;
40326d8a33d5b7 Shaohua Li 2017-08-31 362
40326d8a33d5b7 Shaohua Li 2017-08-31 363 /*
40326d8a33d5b7 Shaohua Li 2017-08-31 364 * The bios of the request may be started from the middle of
40326d8a33d5b7 Shaohua Li 2017-08-31 365 * the 'bvec' because of bio splitting, so we can't directly
86af5952a8470f Ming Lei 2019-02-15 366 * copy bio->bi_iov_vec to new bvec. The rq_for_each_bvec
40326d8a33d5b7 Shaohua Li 2017-08-31 367 * API will take care of all details for us.
40326d8a33d5b7 Shaohua Li 2017-08-31 368 */
86af5952a8470f Ming Lei 2019-02-15 369 rq_for_each_bvec(tmp, rq, rq_iter) {
40326d8a33d5b7 Shaohua Li 2017-08-31 370 *bvec = tmp;
40326d8a33d5b7 Shaohua Li 2017-08-31 371 bvec++;
40326d8a33d5b7 Shaohua Li 2017-08-31 372 }
96f03c8cb29f2e Jens Axboe 2025-11-24 373 bvec = cmd->bvec;
96f03c8cb29f2e Jens Axboe 2025-11-24 374 offset = 0;
fd858d1ca9694c Ming Lei 2025-10-15 375 } else {
96f03c8cb29f2e Jens Axboe 2025-11-24 376 /*
96f03c8cb29f2e Jens Axboe 2025-11-24 377 * Same here, this bio may be started from the middle of the
96f03c8cb29f2e Jens Axboe 2025-11-24 378 * 'bvec' because of bio splitting, so offset from the bvec
96f03c8cb29f2e Jens Axboe 2025-11-24 379 * must be passed to iov iterator
96f03c8cb29f2e Jens Axboe 2025-11-24 380 */
96f03c8cb29f2e Jens Axboe 2025-11-24 381 offset = bio->bi_iter.bi_bvec_done;
96f03c8cb29f2e Jens Axboe 2025-11-24 382 bvec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);
fd858d1ca9694c Ming Lei 2025-10-15 383 }
96f03c8cb29f2e Jens Axboe 2025-11-24 384 atomic_set(&cmd->ref, 2);
96f03c8cb29f2e Jens Axboe 2025-11-24 385
96f03c8cb29f2e Jens Axboe 2025-11-24 386 iov_iter_bvec(&iter, rw, bvec, nr_bvec, blk_rq_bytes(rq));
96f03c8cb29f2e Jens Axboe 2025-11-24 387 iter.iov_offset = offset;
fd858d1ca9694c Ming Lei 2025-10-15 388
fd858d1ca9694c Ming Lei 2025-10-15 389 cmd->iocb.ki_pos = pos;
96f03c8cb29f2e Jens Axboe 2025-11-24 390 cmd->iocb.ki_filp = file;
fd858d1ca9694c Ming Lei 2025-10-15 391 cmd->iocb.ki_ioprio = req_get_ioprio(rq);
fd858d1ca9694c Ming Lei 2025-10-15 392 if (cmd->use_aio) {
fd858d1ca9694c Ming Lei 2025-10-15 393 cmd->iocb.ki_complete = lo_rw_aio_complete;
fd858d1ca9694c Ming Lei 2025-10-15 394 cmd->iocb.ki_flags = IOCB_DIRECT;
fd858d1ca9694c Ming Lei 2025-10-15 395 } else {
fd858d1ca9694c Ming Lei 2025-10-15 396 cmd->iocb.ki_complete = NULL;
fd858d1ca9694c Ming Lei 2025-10-15 397 cmd->iocb.ki_flags = 0;
fd858d1ca9694c Ming Lei 2025-10-15 398 }
bc07c10a3603a5 Ming Lei 2015-08-17 399
1a83d226268cfb Tetsuo Handa 2026-05-08 @400 if (!file)
1a83d226268cfb Tetsuo Handa 2026-05-08 401 pr_err("%s(loop%d) starting %s with NULL file (already cleared?)\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 402 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read");
presumably this is debug code which isn't going to be merged but
1a83d226268cfb Tetsuo Handa 2026-05-08 403 else if (!file_count(file))
1a83d226268cfb Tetsuo Handa 2026-05-08 404 pr_err("%s(loop%d) starting %s with raw_refcnt=0x%lx (already released?)\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 405 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read",
1a83d226268cfb Tetsuo Handa 2026-05-08 406 __file_ref_read_raw(&file->f_ref));
1a83d226268cfb Tetsuo Handa 2026-05-08 407 else if (IS_ENABLED(CONFIG_DEBUG_AID_FOR_SYZBOT))
1a83d226268cfb Tetsuo Handa 2026-05-08 408 pr_info("%s(loop%d) starting %s with raw_refcnt=0x%lx, refcnt=%lu\n",
1a83d226268cfb Tetsuo Handa 2026-05-08 409 __func__, lo->lo_number, rw == ITER_SOURCE ? "write" : "read",
1a83d226268cfb Tetsuo Handa 2026-05-08 410 __file_ref_read_raw(&file->f_ref), file_count(file));
39d86db34e41b9 Ming Lei 2025-05-27 411 if (rw == ITER_SOURCE) {
c4706c5058a7bd Ming Lei 2025-07-16 412 kiocb_start_write(&cmd->iocb);
7c98f7cb8fda96 Miklos Szeredi 2023-08-28 @413 ret = file->f_op->write_iter(&cmd->iocb, &iter);
39d86db34e41b9 Ming Lei 2025-05-27 414 } else
7c98f7cb8fda96 Miklos Szeredi 2023-08-28 415 ret = file->f_op->read_iter(&cmd->iocb, &iter);
it file is NULL then it's going to crash here.
bc07c10a3603a5 Ming Lei 2015-08-17 416
92d773324b7edb Shaohua Li 2017-09-01 417 lo_rw_aio_do_completion(cmd);
92d773324b7edb Shaohua Li 2017-09-01 418
bc07c10a3603a5 Ming Lei 2015-08-17 419 if (ret != -EIOCBQUEUED)
6b19b766e8f077 Jens Axboe 2021-10-21 420 lo_rw_aio_complete(&cmd->iocb, ret);
f2fed441c69b92 Christoph Hellwig 2025-04-09 421 return -EIOCBQUEUED;
bc07c10a3603a5 Ming Lei 2015-08-17 422 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
2026-05-09 13:19 ` Dan Carpenter
(?)
@ 2026-05-09 13:32 ` Tetsuo Handa
2026-05-09 13:37 ` Dan Carpenter
-1 siblings, 1 reply; 4+ messages in thread
From: Tetsuo Handa @ 2026-05-09 13:32 UTC (permalink / raw)
To: Dan Carpenter, oe-kbuild; +Cc: lkp, oe-kbuild-all
On 2026/05/09 22:19, Dan Carpenter wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: e98d21c170b01ddef366f023bbfcf6b31509fa83
> commit: 1a83d226268cfb9ea546febe6515f39584df8fd2 [4172/4394] loop: check refcount in __loop_clr_fd() and lo_rw_aio()
> config: m68k-randconfig-r073-20260509 (https://download.01.org/0day-ci/archive/20260509/202605092030.FAH71Jou-lkp@intel.com/config)
> compiler: m68k-linux-gcc (GCC) 12.5.0
> smatch: v0.5.0-9065-ge9cc34fd
>
> 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>
> | Reported-by: Dan Carpenter <error27@gmail.com>
> | Closes: https://lore.kernel.org/r/202605092030.FAH71Jou-lkp@intel.com/
>
> New smatch warnings:
> drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
Thanks, but this is intentional in order to get reported
at https://syzkaller.appspot.com/bug?extid=cd8a9a308e879a4e2c28
after printing debug information.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
2026-05-09 13:32 ` Tetsuo Handa
@ 2026-05-09 13:37 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2026-05-09 13:37 UTC (permalink / raw)
To: Tetsuo Handa; +Cc: oe-kbuild, lkp, oe-kbuild-all
On Sat, May 09, 2026 at 10:32:06PM +0900, Tetsuo Handa wrote:
> On 2026/05/09 22:19, Dan Carpenter wrote:
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head: e98d21c170b01ddef366f023bbfcf6b31509fa83
> > commit: 1a83d226268cfb9ea546febe6515f39584df8fd2 [4172/4394] loop: check refcount in __loop_clr_fd() and lo_rw_aio()
> > config: m68k-randconfig-r073-20260509 (https://download.01.org/0day-ci/archive/20260509/202605092030.FAH71Jou-lkp@intel.com/config)
> > compiler: m68k-linux-gcc (GCC) 12.5.0
> > smatch: v0.5.0-9065-ge9cc34fd
> >
> > 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>
> > | Reported-by: Dan Carpenter <error27@gmail.com>
> > | Closes: https://lore.kernel.org/r/202605092030.FAH71Jou-lkp@intel.com/
> >
> > New smatch warnings:
> > drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400)
>
> Thanks, but this is intentional in order to get reported
> at https://syzkaller.appspot.com/bug?extid=cd8a9a308e879a4e2c28
> after printing debug information.
With these zero day bots, I just have access to the email which you see,
not the commit itself. Maybe one idea is we add a comment when we're
adding linux-next only debug code?
On the other hand, reviewing and sending these emails is very fast and
costs me no time at all so I don't mind either way.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2026-05-09 13:37 UTC | newest]
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2026-05-09 12:56 [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400) kernel test robot
2026-05-09 13:19 ` Dan Carpenter
2026-05-09 13:32 ` Tetsuo Handa
2026-05-09 13:37 ` Dan Carpenter
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