| Message ID | 20201026150851.528148-3-aleksandrnogikh@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | net, mac80211, kernel: enable KCOV remote coverage collection for 802.11 frame handling | expand |
On Mon, Oct 26, 2020 at 11:11 AM Aleksandr Nogikh <aleksandrnogikh@gmail.com> wrote: > > From: Aleksandr Nogikh <nogikh@google.com> > > Remote KCOV coverage collection enables coverage-guided fuzzing of the > code that is not reachable during normal system call execution. It is > especially helpful for fuzzing networking subsystems, where it is > common to perform packet handling in separate work queues even for the > packets that originated directly from the user space. > > Enable coverage-guided frame injection by adding kcov remote handle to > skb extensions. Default initialization in __alloc_skb and > __build_skb_around ensures that no socket buffer that was generated > during a system call will be missed. > > Code that is of interest and that performs packet processing should be > annotated with kcov_remote_start()/kcov_remote_stop(). > > An alternative approach is to determine kcov_handle solely on the > basis of the device/interface that received the specific socket > buffer. However, in this case it would be impossible to distinguish > between packets that originated during normal background network > processes or were intentionally injected from the user space. > > Signed-off-by: Aleksandr Nogikh <nogikh@google.com> > -- > v2 -> v3: > * Reimplemented this change. Now kcov handle is added to skb > extensions instead of sk_buff. > v1 -> v2: > * Updated the commit message. > --- > include/linux/skbuff.h | 31 +++++++++++++++++++++++++++++++ > net/core/skbuff.c | 11 +++++++++++ > 2 files changed, 42 insertions(+) > > diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h > index a828cf99c521..b63d90faa8e9 100644 > --- a/include/linux/skbuff.h > +++ b/include/linux/skbuff.h > @@ -4150,6 +4150,9 @@ enum skb_ext_id { > #endif > #if IS_ENABLED(CONFIG_MPTCP) > SKB_EXT_MPTCP, > +#endif > +#if IS_ENABLED(CONFIG_KCOV) > + SKB_EXT_KCOV_HANDLE, > #endif > SKB_EXT_NUM, /* must be last */ > }; > @@ -4605,5 +4608,33 @@ static inline void skb_reset_redirect(struct sk_buff *skb) > #endif > } > > +#ifdef CONFIG_KCOV > + > +static inline void skb_set_kcov_handle(struct sk_buff *skb, const u64 kcov_handle) > +{ > + /* No reason to allocate skb extensions to set kcov_handle if kcov_handle is 0. */ If the handle does not need to be set if zero, why then set it if the skb has extensions? > + if (skb_has_extensions(skb) || kcov_handle) { > + u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE); skb_ext_add and skb_ext_find are not defined unless CONFIG_SKB_EXTENSIONS. Perhaps CONFIG_KCOV should be made to select that? > + > + if (kcov_handle_ptr) > + *kcov_handle_ptr = kcov_handle; > + } > +} > + > +static inline u64 skb_get_kcov_handle(struct sk_buff *skb) > +{ > + u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE); > + > + return kcov_handle ? *kcov_handle : 0; > +} > + > +#else > + > +static inline void skb_set_kcov_handle(struct sk_buff *skb, const u64 kcov_handle) { } > + > +static inline u64 skb_get_kcov_handle(struct sk_buff *skb) { return 0; } > + > +#endif /* CONFIG_KCOV */
Hi Aleksandr,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on 2ef991b5fdbe828dc8fb8af473dab160729570ed]
url: https://github.com/0day-ci/linux/commits/Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
base: 2ef991b5fdbe828dc8fb8af473dab160729570ed
config: x86_64-randconfig-a001-20201026 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project f2c25c70791de95d2466e09b5b58fc37f6ccd7a4)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/46d348800b64931071128ba47a5f17641d288a2f
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
git checkout 46d348800b64931071128ba47a5f17641d288a2f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from drivers/vdpa/vdpa_sim/vdpa_sim.c:24:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/vdpa/vdpa_sim/vdpa_sim.c:364:27: warning: shift count >= width of type [-Wshift-count-overflow]
dev->coherent_dma_mask = DMA_BIT_MASK(64);
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/intel/e1000/e1000_main.c:4:
In file included from drivers/net/ethernet/intel/e1000/e1000.h:18:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
~~~~~~~~~~~~~~~~~^~~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
3 warnings and 4 errors generated.
--
In file included from net/ipv4/fib_trie.c:49:
In file included from include/linux/inet.h:42:
In file included from include/net/net_namespace.h:39:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
~~~~~~~~~~~~~~~~~^~~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
3 warnings and 4 errors generated.
vim +364 drivers/vdpa/vdpa_sim/vdpa_sim.c
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 342
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 343 static struct vdpasim *vdpasim_create(void)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 344 {
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 345 const struct vdpa_config_ops *ops;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 346 struct vdpasim *vdpasim;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 347 struct device *dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 348 int ret = -ENOMEM;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 349
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 350 if (batch_mapping)
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 351 ops = &vdpasim_net_batch_config_ops;
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 352 else
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 353 ops = &vdpasim_net_config_ops;
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 354
a9974489b61c09 drivers/vdpa/vdpa_sim/vdpa_sim.c Max Gurtovoy 2020-08-04 355 vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 356 if (!vdpasim)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 357 goto err_alloc;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 358
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 359 INIT_WORK(&vdpasim->work, vdpasim_work);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 360 spin_lock_init(&vdpasim->lock);
1e3e792650d2c0 drivers/vdpa/vdpa_sim/vdpa_sim.c Michael S. Tsirkin 2020-08-10 361 spin_lock_init(&vdpasim->iommu_lock);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 362
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 363 dev = &vdpasim->vdpa.dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 @364 dev->coherent_dma_mask = DMA_BIT_MASK(64);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 365 set_dma_ops(dev, &vdpasim_dma_ops);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 366
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 367 vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 368 if (!vdpasim->iommu)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 369 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 370
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 371 vdpasim->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 372 if (!vdpasim->buffer)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 373 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 374
5d7d0f387ae1b9 drivers/vdpa/vdpa_sim/vdpa_sim.c Michael S. Tsirkin 2020-07-12 375 eth_random_addr(vdpasim->config.mac);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 376
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 377 vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 378 vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 379
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 380 vdpasim->vdpa.dma_dev = dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 381 ret = vdpa_register_device(&vdpasim->vdpa);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 382 if (ret)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 383 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 384
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 385 return vdpasim;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 386
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 387 err_iommu:
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 388 put_device(dev);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 389 err_alloc:
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 390 return ERR_PTR(ret);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 391 }
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 392
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Hi Aleksandr,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on 2ef991b5fdbe828dc8fb8af473dab160729570ed]
url: https://github.com/0day-ci/linux/commits/Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
base: 2ef991b5fdbe828dc8fb8af473dab160729570ed
config: x86_64-randconfig-a004-20201026 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project f2c25c70791de95d2466e09b5b58fc37f6ccd7a4)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/46d348800b64931071128ba47a5f17641d288a2f
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
git checkout 46d348800b64931071128ba47a5f17641d288a2f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from drivers/net/ethernet/jme.c:17:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/jme.c:2863:30: warning: shift count >= width of type [-Wshift-count-overflow]
!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/jme.c:2864:42: warning: shift count >= width of type [-Wshift-count-overflow]
if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
--
In file included from drivers/media/pci/ddbridge/ddbridge-main.c:35:
In file included from drivers/media/pci/ddbridge/ddbridge.h:56:
In file included from include/media/dvb_net.h:22:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/media/pci/ddbridge/ddbridge-main.c:183:29: warning: shift count >= width of type [-Wshift-count-overflow]
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/broadcom/tg3.c:38:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/broadcom/tg3.c:17768:33: warning: shift count >= width of type [-Wshift-count-overflow]
persist_dma_mask = dma_mask = DMA_BIT_MASK(64);
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c:13:
In file included from drivers/net/ethernet/aquantia/atlantic/aq_main.h:12:
In file included from drivers/net/ethernet/aquantia/atlantic/aq_common.h:13:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c:122:31: warning: shift count >= width of type [-Wshift-count-overflow]
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c:124:43: warning: shift count >= width of type [-Wshift-count-overflow]
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
--
In file included from drivers/net/ethernet/brocade/bna/bnad.c:12:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/brocade/bna/bnad.c:3559:45: warning: shift count >= width of type [-Wshift-count-overflow]
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/atheros/alx/main.c:38:
In file included from include/linux/ip.h:16:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/atheros/alx/main.c:1707:45: warning: shift count >= width of type [-Wshift-count-overflow]
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/marvell/skge.c:20:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/marvell/skge.c:3894:51: warning: shift count >= width of type [-Wshift-count-overflow]
if (!only_32bit_dma && !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/marvell/skge.c:3896:43: warning: shift count >= width of type [-Wshift-count-overflow]
err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
--
In file included from drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:42:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:6692:30: warning: shift count >= width of type [-Wshift-count-overflow]
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:6694:43: warning: shift count >= width of type [-Wshift-count-overflow]
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
--
In file included from drivers/net/ethernet/cavium/liquidio/lio_main.c:22:
In file included from include/net/vxlan.h:5:
In file included from include/linux/if_vlan.h:10:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/cavium/liquidio/lio_main.c:1401:52: warning: shift count >= width of type [-Wshift-count-overflow]
if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c:43:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c:2920:31: warning: shift count >= width of type [-Wshift-count-overflow]
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c:2922:43: warning: shift count >= width of type [-Wshift-count-overflow]
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
--
In file included from drivers/net/ethernet/neterion/s2io.c:62:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/neterion/s2io.c:7669:32: warning: shift count >= width of type [-Wshift-count-overflow]
if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/net/ethernet/neterion/s2io.c:7672:41: warning: shift count >= width of type [-Wshift-count-overflow]
if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
2 warnings and 4 errors generated.
..
vim +2863 drivers/net/ethernet/jme.c
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2858
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2859 static int
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2860 jme_pci_dma64(struct pci_dev *pdev)
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2861 {
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2862 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
e930438c42e744e drivers/net/jme.c Yang Hongyang 2009-04-13 @2863 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
e930438c42e744e drivers/net/jme.c Yang Hongyang 2009-04-13 2864 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2865 return 1;
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2866
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2867 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
e930438c42e744e drivers/net/jme.c Yang Hongyang 2009-04-13 2868 !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
e930438c42e744e drivers/net/jme.c Yang Hongyang 2009-04-13 2869 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2870 return 1;
814c01dc7c53303 drivers/net/jme.c Guo-Fu Tseng 2009-02-27 2871
284901a90a9e0b8 drivers/net/jme.c Yang Hongyang 2009-04-06 2872 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
284901a90a9e0b8 drivers/net/jme.c Yang Hongyang 2009-04-06 2873 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2874 return 0;
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2875
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2876 return -1;
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2877 }
95252236e73e789 drivers/net/jme.c Guo-Fu Tseng 2008-09-16 2878
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
On Mon, Oct 26, 2020 at 7:57 PM Willem de Bruijn <willemdebruijn.kernel@gmail.com> wrote: [...] > If the handle does not need to be set if zero, why then set it if the > skb has extensions? The point of that condition is to avoid unnecessary allocations of skb extension objects. At the same time, one would expect skb_get_kcov_handle to return the latest value that was set via skb_set_kcov_handle. So if a buffer already has a non-zero kcov_handle and skb_set_kcov_handle is called to set it to zero, it should be set to zero. > skb_ext_add and skb_ext_find are not defined unless CONFIG_SKB_EXTENSIONS. > > Perhaps CONFIG_KCOV should be made to select that? Yes, thank you for pointing it out. I’ll fix it in the next version.
On Tue, Oct 27, 2020 at 8:31 AM Aleksandr Nogikh <nogikh@google.com> wrote: > > On Mon, Oct 26, 2020 at 7:57 PM Willem de Bruijn > <willemdebruijn.kernel@gmail.com> wrote: > [...] > > If the handle does not need to be set if zero, why then set it if the > > skb has extensions? > > The point of that condition is to avoid unnecessary allocations of skb extension > objects. At the same time, one would expect skb_get_kcov_handle to return the > latest value that was set via skb_set_kcov_handle. So if a buffer already has a > non-zero kcov_handle and skb_set_kcov_handle is called to set it to zero, it > should be set to zero. I see. I thought it was some best effort approach: if there happens to be space, use it, but don't allocate. Which I did not understand. Could you rephrase the comment to make more clear that this is about clearing a possibly previously set value. > > skb_ext_add and skb_ext_find are not defined unless CONFIG_SKB_EXTENSIONS. > > > > Perhaps CONFIG_KCOV should be made to select that? > > Yes, thank you for pointing it out. I’ll fix it in the next version.
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index a828cf99c521..b63d90faa8e9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -4150,6 +4150,9 @@ enum skb_ext_id { #endif #if IS_ENABLED(CONFIG_MPTCP) SKB_EXT_MPTCP, +#endif +#if IS_ENABLED(CONFIG_KCOV) + SKB_EXT_KCOV_HANDLE, #endif SKB_EXT_NUM, /* must be last */ }; @@ -4605,5 +4608,33 @@ static inline void skb_reset_redirect(struct sk_buff *skb) #endif } +#ifdef CONFIG_KCOV + +static inline void skb_set_kcov_handle(struct sk_buff *skb, const u64 kcov_handle) +{ + /* No reason to allocate skb extensions to set kcov_handle if kcov_handle is 0. */ + if (skb_has_extensions(skb) || kcov_handle) { + u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE); + + if (kcov_handle_ptr) + *kcov_handle_ptr = kcov_handle; + } +} + +static inline u64 skb_get_kcov_handle(struct sk_buff *skb) +{ + u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE); + + return kcov_handle ? *kcov_handle : 0; +} + +#else + +static inline void skb_set_kcov_handle(struct sk_buff *skb, const u64 kcov_handle) { } + +static inline u64 skb_get_kcov_handle(struct sk_buff *skb) { return 0; } + +#endif /* CONFIG_KCOV */ + #endif /* __KERNEL__ */ #endif /* _LINUX_SKBUFF_H */ diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 1ba8f0163744..c5e6c0b83a92 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -249,6 +249,9 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, fclones->skb2.fclone = SKB_FCLONE_CLONE; } + + skb_set_kcov_handle(skb, kcov_common_handle()); + out: return skb; nodata: @@ -282,6 +285,8 @@ static struct sk_buff *__build_skb_around(struct sk_buff *skb, memset(shinfo, 0, offsetof(struct skb_shared_info, dataref)); atomic_set(&shinfo->dataref, 1); + skb_set_kcov_handle(skb, kcov_common_handle()); + return skb; } @@ -4203,6 +4208,9 @@ static const u8 skb_ext_type_len[] = { #if IS_ENABLED(CONFIG_MPTCP) [SKB_EXT_MPTCP] = SKB_EXT_CHUNKSIZEOF(struct mptcp_ext), #endif +#if IS_ENABLED(CONFIG_KCOV) + [SKB_EXT_KCOV_HANDLE] = SKB_EXT_CHUNKSIZEOF(u64), +#endif }; static __always_inline unsigned int skb_ext_total_length(void) @@ -4219,6 +4227,9 @@ static __always_inline unsigned int skb_ext_total_length(void) #endif #if IS_ENABLED(CONFIG_MPTCP) skb_ext_type_len[SKB_EXT_MPTCP] + +#endif +#if IS_ENABLED(CONFIG_KCOV) + skb_ext_type_len[SKB_EXT_KCOV_HANDLE] + #endif 0; }