* [axboe:rw_iter 143/471] drivers/gpu/drm/loongson/lsdc_crtc.c:647 lsdc_crtc_man_op_write() warn: potential spectre issue 'buf' [w]
@ 2026-03-08 22:29 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-03-08 22:29 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Jens Axboe <axboe@kernel.dk>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git rw_iter
head: 0a49759be1c3b29207758e467fdc1a90d0716d06
commit: 76dedd5c839e0bd2c29550f6a8491a5676f9b0f3 [143/471] drm/loongson: convert to read/write iterators
:::::: branch date: 2 days ago
:::::: commit date: 2 days ago
config: openrisc-randconfig-r071-20260307 (https://download.01.org/0day-ci/archive/20260309/202603090633.tFwzlZSd-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.2.0
smatch: v0.5.0-9004-gb810ac53
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/202603090633.tFwzlZSd-lkp@intel.com/
smatch warnings:
drivers/gpu/drm/loongson/lsdc_crtc.c:647 lsdc_crtc_man_op_write() warn: potential spectre issue 'buf' [w]
vim +/buf +647 drivers/gpu/drm/loongson/lsdc_crtc.c
f39db26c54281d Sui Jingfeng 2023-06-15 632
76dedd5c839e0b Jens Axboe 2024-04-09 633 static ssize_t lsdc_crtc_man_op_write(struct kiocb *iocb, struct iov_iter *from)
f39db26c54281d Sui Jingfeng 2023-06-15 634 {
76dedd5c839e0b Jens Axboe 2024-04-09 635 struct seq_file *m = iocb->ki_filp->private_data;
f39db26c54281d Sui Jingfeng 2023-06-15 636 struct lsdc_crtc *lcrtc = m->private;
f39db26c54281d Sui Jingfeng 2023-06-15 637 const struct lsdc_crtc_hw_ops *ops = lcrtc->hw_ops;
76dedd5c839e0b Jens Axboe 2024-04-09 638 size_t len = iov_iter_count(from);
f39db26c54281d Sui Jingfeng 2023-06-15 639 char buf[16];
f39db26c54281d Sui Jingfeng 2023-06-15 640
f39db26c54281d Sui Jingfeng 2023-06-15 641 if (len > sizeof(buf) - 1)
f39db26c54281d Sui Jingfeng 2023-06-15 642 return -EINVAL;
f39db26c54281d Sui Jingfeng 2023-06-15 643
76dedd5c839e0b Jens Axboe 2024-04-09 644 if (!copy_from_iter_full(buf, len, from))
f39db26c54281d Sui Jingfeng 2023-06-15 645 return -EFAULT;
f39db26c54281d Sui Jingfeng 2023-06-15 646
f39db26c54281d Sui Jingfeng 2023-06-15 @647 buf[len] = '\0';
f39db26c54281d Sui Jingfeng 2023-06-15 648
f39db26c54281d Sui Jingfeng 2023-06-15 649 if (sysfs_streq(buf, "soft_reset"))
f39db26c54281d Sui Jingfeng 2023-06-15 650 ops->soft_reset(lcrtc);
f39db26c54281d Sui Jingfeng 2023-06-15 651 else if (sysfs_streq(buf, "enable"))
f39db26c54281d Sui Jingfeng 2023-06-15 652 ops->enable(lcrtc);
f39db26c54281d Sui Jingfeng 2023-06-15 653 else if (sysfs_streq(buf, "disable"))
f39db26c54281d Sui Jingfeng 2023-06-15 654 ops->disable(lcrtc);
f39db26c54281d Sui Jingfeng 2023-06-15 655 else if (sysfs_streq(buf, "flip"))
f39db26c54281d Sui Jingfeng 2023-06-15 656 ops->flip(lcrtc);
f39db26c54281d Sui Jingfeng 2023-06-15 657 else if (sysfs_streq(buf, "clone"))
f39db26c54281d Sui Jingfeng 2023-06-15 658 ops->clone(lcrtc);
f39db26c54281d Sui Jingfeng 2023-06-15 659
f39db26c54281d Sui Jingfeng 2023-06-15 660 return len;
f39db26c54281d Sui Jingfeng 2023-06-15 661 }
f39db26c54281d Sui Jingfeng 2023-06-15 662
:::::: The code at line 647 was first introduced by commit
:::::: f39db26c54281da6a785259498ca74b5e470476f drm: Add kms driver for loongson display controller
:::::: TO: Sui Jingfeng <suijingfeng@loongson.cn>
:::::: CC: Sui Jingfeng <suijingfeng@loongson.cn>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
* [axboe:rw_iter 143/471] drivers/gpu/drm/loongson/lsdc_crtc.c:647 lsdc_crtc_man_op_write() warn: potential spectre issue 'buf' [w]
@ 2026-03-12 4:48 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-03-12 4:48 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Jens Axboe <axboe@kernel.dk>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git rw_iter
head: 0a49759be1c3b29207758e467fdc1a90d0716d06
commit: 76dedd5c839e0bd2c29550f6a8491a5676f9b0f3 [143/471] drm/loongson: convert to read/write iterators
:::::: branch date: 6 days ago
:::::: commit date: 6 days ago
config: openrisc-randconfig-r071-20260307 (https://download.01.org/0day-ci/archive/20260312/202603121202.TPjZgGgX-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.2.0
smatch: v0.5.0-9004-gb810ac53
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/202603121202.TPjZgGgX-lkp@intel.com/
smatch warnings:
drivers/gpu/drm/loongson/lsdc_crtc.c:647 lsdc_crtc_man_op_write() warn: potential spectre issue 'buf' [w]
vim +/buf +647 drivers/gpu/drm/loongson/lsdc_crtc.c
f39db26c54281da Sui Jingfeng 2023-06-15 632
76dedd5c839e0bd Jens Axboe 2024-04-09 633 static ssize_t lsdc_crtc_man_op_write(struct kiocb *iocb, struct iov_iter *from)
f39db26c54281da Sui Jingfeng 2023-06-15 634 {
76dedd5c839e0bd Jens Axboe 2024-04-09 635 struct seq_file *m = iocb->ki_filp->private_data;
f39db26c54281da Sui Jingfeng 2023-06-15 636 struct lsdc_crtc *lcrtc = m->private;
f39db26c54281da Sui Jingfeng 2023-06-15 637 const struct lsdc_crtc_hw_ops *ops = lcrtc->hw_ops;
76dedd5c839e0bd Jens Axboe 2024-04-09 638 size_t len = iov_iter_count(from);
f39db26c54281da Sui Jingfeng 2023-06-15 639 char buf[16];
f39db26c54281da Sui Jingfeng 2023-06-15 640
f39db26c54281da Sui Jingfeng 2023-06-15 641 if (len > sizeof(buf) - 1)
f39db26c54281da Sui Jingfeng 2023-06-15 642 return -EINVAL;
f39db26c54281da Sui Jingfeng 2023-06-15 643
76dedd5c839e0bd Jens Axboe 2024-04-09 644 if (!copy_from_iter_full(buf, len, from))
f39db26c54281da Sui Jingfeng 2023-06-15 645 return -EFAULT;
f39db26c54281da Sui Jingfeng 2023-06-15 646
f39db26c54281da Sui Jingfeng 2023-06-15 @647 buf[len] = '\0';
f39db26c54281da Sui Jingfeng 2023-06-15 648
f39db26c54281da Sui Jingfeng 2023-06-15 649 if (sysfs_streq(buf, "soft_reset"))
f39db26c54281da Sui Jingfeng 2023-06-15 650 ops->soft_reset(lcrtc);
f39db26c54281da Sui Jingfeng 2023-06-15 651 else if (sysfs_streq(buf, "enable"))
f39db26c54281da Sui Jingfeng 2023-06-15 652 ops->enable(lcrtc);
f39db26c54281da Sui Jingfeng 2023-06-15 653 else if (sysfs_streq(buf, "disable"))
f39db26c54281da Sui Jingfeng 2023-06-15 654 ops->disable(lcrtc);
f39db26c54281da Sui Jingfeng 2023-06-15 655 else if (sysfs_streq(buf, "flip"))
f39db26c54281da Sui Jingfeng 2023-06-15 656 ops->flip(lcrtc);
f39db26c54281da Sui Jingfeng 2023-06-15 657 else if (sysfs_streq(buf, "clone"))
f39db26c54281da Sui Jingfeng 2023-06-15 658 ops->clone(lcrtc);
f39db26c54281da Sui Jingfeng 2023-06-15 659
f39db26c54281da Sui Jingfeng 2023-06-15 660 return len;
f39db26c54281da Sui Jingfeng 2023-06-15 661 }
f39db26c54281da Sui Jingfeng 2023-06-15 662
:::::: The code at line 647 was first introduced by commit
:::::: f39db26c54281da6a785259498ca74b5e470476f drm: Add kms driver for loongson display controller
:::::: TO: Sui Jingfeng <suijingfeng@loongson.cn>
:::::: CC: Sui Jingfeng <suijingfeng@loongson.cn>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-03-12 4:49 UTC | newest]
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2026-03-12 4:48 [axboe:rw_iter 143/471] drivers/gpu/drm/loongson/lsdc_crtc.c:647 lsdc_crtc_man_op_write() warn: potential spectre issue 'buf' [w] kernel test robot
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2026-03-08 22:29 kernel test robot
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