* kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
@ 2026-01-13 9:17 kernel test robot
2026-01-13 16:58 ` Andrii Nakryiko
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2026-01-13 9:17 UTC (permalink / raw)
To: Mykyta Yatsenko
Cc: oe-kbuild-all, linux-kernel, Alexei Starovoitov, Andrii Nakryiko
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b71e635feefc852405b14620a7fc58c4c80c0f73
commit: a498ee7576de24b4b0916ce56cf2686e261a29f7 bpf: Implement dynptr copy kfuncs
date: 8 months ago
config: i386-randconfig-063-20260113 (https://download.01.org/0day-ci/archive/20260113/202601131740.6C3BdBaB-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260113/202601131740.6C3BdBaB-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/202601131740.6C3BdBaB-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/trace/bpf_trace.c:835:41: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr @@ got void * @@
kernel/trace/bpf_trace.c:835:41: sparse: expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr
kernel/trace/bpf_trace.c:835:41: sparse: got void *
>> kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3633:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3647:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3654:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3662:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3670:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...):
include/linux/rcupdate.h:871:25: sparse: sparse: context imbalance in 'uprobe_prog_run' - unexpected unlock
vim +/__user +3619 kernel/trace/bpf_trace.c
3615
3616 __bpf_kfunc int bpf_probe_read_user_dynptr(struct bpf_dynptr *dptr, u32 off,
3617 u32 size, const void __user *unsafe_ptr__ign)
3618 {
> 3619 return __bpf_dynptr_copy(dptr, off, size, (const void *)unsafe_ptr__ign,
3620 copy_user_data_nofault, NULL);
3621 }
3622
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
2026-01-13 9:17 kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression kernel test robot
@ 2026-01-13 16:58 ` Andrii Nakryiko
0 siblings, 0 replies; 3+ messages in thread
From: Andrii Nakryiko @ 2026-01-13 16:58 UTC (permalink / raw)
To: kernel test robot
Cc: Mykyta Yatsenko, oe-kbuild-all, linux-kernel, Alexei Starovoitov,
Andrii Nakryiko
On Tue, Jan 13, 2026 at 1:17 AM kernel test robot <lkp@intel.com> wrote:
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: b71e635feefc852405b14620a7fc58c4c80c0f73
> commit: a498ee7576de24b4b0916ce56cf2686e261a29f7 bpf: Implement dynptr copy kfuncs
> date: 8 months ago
> config: i386-randconfig-063-20260113 (https://download.01.org/0day-ci/archive/20260113/202601131740.6C3BdBaB-lkp@intel.com/config)
> compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260113/202601131740.6C3BdBaB-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/202601131740.6C3BdBaB-lkp@intel.com/
>
> sparse warnings: (new ones prefixed by >>)
> kernel/trace/bpf_trace.c:835:41: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr @@ got void * @@
> kernel/trace/bpf_trace.c:835:41: sparse: expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr
> kernel/trace/bpf_trace.c:835:41: sparse: got void *
> >> kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
> kernel/trace/bpf_trace.c:3633:56: sparse: sparse: cast removes address space '__user' of expression
> kernel/trace/bpf_trace.c:3647:52: sparse: sparse: cast removes address space '__user' of expression
> kernel/trace/bpf_trace.c:3654:56: sparse: sparse: cast removes address space '__user' of expression
> kernel/trace/bpf_trace.c:3662:52: sparse: sparse: cast removes address space '__user' of expression
> kernel/trace/bpf_trace.c:3670:56: sparse: sparse: cast removes address space '__user' of expression
this is intentional, but what if we cast void __user * to long and
then to void *, would that go away? Mykyta, do you mind trying?
> kernel/trace/bpf_trace.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...):
> include/linux/rcupdate.h:871:25: sparse: sparse: context imbalance in 'uprobe_prog_run' - unexpected unlock
>
> vim +/__user +3619 kernel/trace/bpf_trace.c
>
> 3615
> 3616 __bpf_kfunc int bpf_probe_read_user_dynptr(struct bpf_dynptr *dptr, u32 off,
> 3617 u32 size, const void __user *unsafe_ptr__ign)
> 3618 {
> > 3619 return __bpf_dynptr_copy(dptr, off, size, (const void *)unsafe_ptr__ign,
> 3620 copy_user_data_nofault, NULL);
> 3621 }
> 3622
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
* kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
@ 2025-12-11 2:45 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2025-12-11 2:45 UTC (permalink / raw)
To: Mykyta Yatsenko
Cc: oe-kbuild-all, linux-kernel, Alexei Starovoitov, Andrii Nakryiko
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8c8081cc599fcafa25371d50959c17e154f9fd08
commit: a498ee7576de24b4b0916ce56cf2686e261a29f7 bpf: Implement dynptr copy kfuncs
date: 7 months ago
config: x86_64-randconfig-123-20251211 (https://download.01.org/0day-ci/archive/20251211/202512111057.s2Tp972J-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512111057.s2Tp972J-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/202512111057.s2Tp972J-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/trace/bpf_trace.c:835:41: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr @@ got void * @@
kernel/trace/bpf_trace.c:835:41: sparse: expected void [noderef] __user *[addressable] [assigned] [usertype] sival_ptr
kernel/trace/bpf_trace.c:835:41: sparse: got void *
>> kernel/trace/bpf_trace.c:3619:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3633:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3647:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3654:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3662:52: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c:3670:56: sparse: sparse: cast removes address space '__user' of expression
kernel/trace/bpf_trace.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...):
include/linux/rcupdate.h:871:25: sparse: sparse: context imbalance in 'uprobe_prog_run' - unexpected unlock
vim +/__user +3619 kernel/trace/bpf_trace.c
3615
3616 __bpf_kfunc int bpf_probe_read_user_dynptr(struct bpf_dynptr *dptr, u32 off,
3617 u32 size, const void __user *unsafe_ptr__ign)
3618 {
> 3619 return __bpf_dynptr_copy(dptr, off, size, (const void *)unsafe_ptr__ign,
3620 copy_user_data_nofault, NULL);
3621 }
3622
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
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