Pull bpf fixes from Alexei Starovoitov:
 "This mainly contains verifier fixes that address bugs reported by
  Nicholas Carlini.

   - Fix incorrect non-NULL inference in pointer comparisons: pointer
     types that may be NULL at runtime, pointers with unbounded offsets,
     JMP32 comparisons with zero, and imprecise zero registers (Eduard
     Zingerman)

   - Fix precision tracking for half-dead zero spills, ld_abs/ld_ind
     implicit subprog exit, bpf_loop() callbacks, linked scalar ids and
     NULL call arguments (Eduard Zingerman)

   - Reject BPF_PSEUDO_FUNC reference to the main program, fix zero
     extension of arena 32-bit cmpxchg, don't rewrite bpf_fastcall
     patterns entered by a jump (Eduard Zingerman)

   - Fix percpu map update and BPF_F_CPU validation with sparse CPU IDs
     (Hui Su)

   - Fix NULL-ptr-derefs in bpf_snprintf_btf() for void and VAR types,
     and reject key-less BTF for hash maps (Jiayuan Chen)

   - Various fixes (Kumar Kartikeya Dwivedi):
       - Fix out-of-bounds access in disassembler on invalid LDSX
         instruction
       - mark siginfo of signal tracepoints as scalar and
         sched_process_wait argument as nullable
       - mark faultable stack helpers as sleepable
       - reject tail calls and legacy packet loads from callbacks
       - enforce rbtree callback lock restrictions for resilient locks
       - require MEM_PERCPU for percpu kptr stores
       - clear NON_OWN_REF after RCU protection ends
       - mark NULL kptr stores precise
       - preserve inner map identity in callback frames
       - reject non-scalar bpf_loop() iteration counts

   - Fix trampoline allocation slowdown on x86 by using
     EXECMEM_MODULE_DATA (Mike Rapoport)

   - Keep bpf_refcount_acquire() nullable for borrowed RCU kptrs and
     reject untrusted allocated-object pointers (Ning Ding)

   - Fix special fields handling in recycled rhtab elements (Nuoqi Gui,
     Yuan Chen)"

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (86 commits)
  bpf, riscv: Make arena support depend on ZACAS
  selftests/bpf: Test pointer bpf_loop iteration count rejection
  bpf: Reject non-scalar bpf_loop iteration counts
  bpf: use mark_arg_precision() in check_mem_size_reg()
  bpf: propagate mark_chain_precision() errors out of loop_flag_is_zero()
  selftests/bpf: precision of a NULL global subprogram BTF_ID argument
  bpf: mark a NULL BTF_ID argument of a global subprogram precise
  selftests/bpf: precision of a NULL kfunc argument
  bpf: mark a NULL kfunc argument precise
  selftests/bpf: precision of a NULL global subprogram memory argument
  bpf: mark a NULL memory argument of a call precise
  selftests/bpf: precision of a NULL helper argument
  bpf: mark a NULL call argument precise
  selftests/bpf: Test inner map identities in callbacks
  bpf: Preserve inner map identity in callback frames
  selftests/bpf: Test imprecise scalar kptr stores
  bpf: Mark NULL kptr stores precise
  selftests/bpf: Test rhtab kptr cancellation semantics
  bpf: Cancel special fields when recycling rhtab elements
  selftests/bpf: Test timer field on recycled rhtab element
  ...

Add a verifier test that leaves the raw tracepoint context pointer in R1
when calling bpf_loop(). This is the smallest trigger for the incorrect
precision backtracking: it reuses an existing callback and needs no maps or
userspace setup.

Expect an ordinary scalar-type rejection. Without the verifier fix, the
test instead reaches precision backtracking and reports an internal
"backtracking misuse" error.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260905014735.1452988-3-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

Pull LoongArch fixes from Huacai Chen:

 - Fix build errors when RUST and KASAN enabled

 - fix a typo in comment of vmlinux.lds.S

 - fix several bugs in Kprobes, BPF JIT and KVM support

* tag 'loongarch-fixes-7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  perf build: Add clang and rust target flags for LoongArch
  LoongArch: KVM: Fix TOCTOU race on pv_features
  LoongArch: KVM: Validate MSI data before routing it to EIOINTC
  LoongArch: KVM: Preserve memslot arch flags on KVM_MR_FLAGS_ONLY
  LoongArch: KVM: Remove unused function kvm_arch_flush_remote_tlbs_memslot()
  LoongArch: KVM: Fix resource leak in kvm_loongarch_env_init() error path
  LoongArch: KVM: Add unregister helpers for the KVM interrupt devices
  LoongArch: KVM: Free init resources if kvm_init() fails
  LoongArch: BPF: Fix off-by-one error for insn_is_cast_user()
  LoongArch: Avoid preempt count underflow without probe
  LoongArch: Do not save/restore percpu base register in rethook trampoline
  LoongArch: Remove unused setup_profiling_timer() function
  LoongArch: Fix typo "avaliable" in comment of vmlinux.lds.S
  LoongArch: Do not select HAVE_RUST when KASAN is enabled

Check that mark_chain_precision() is called for a NULL pointer passed
as an __arg_trusted __arg_nullable argument of a global subprogram.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-8-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Check that mark_chain_precision() is called for a NULL pointer passed
as a __nullable kfunc memory argument.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-6-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Check that mark_chain_precision() is called for a NULL pointer passed
as a nullable pointer argument of a global subprogram.
(Pointer arguments of the global subprograms are nullable by default).

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-4-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Check that mark_chain_precision() is called for a NULL nullable memory
argument and for the zero flags argument of bpf_get_local_storage().

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-2-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

check_func_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.

check_helper_call() enforces second parameter of the
bpf_get_local_storage() to be zero, w/o marking the underlying scalar
register precise. Hence a checkpoint created on such a path would
prune against arbitrary scalar value.

Grouping these two into one patch, as they share the same fixes tag.

Fixes: b5dc0163d8fd ("bpf: precise scalar_value tracking")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-1-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Pull drm fixes from Dave Airlie:
 "Lots of scattered fixes: nouveau has a bunch of display fixes for
  blackwell GPUs that should mean we light up monitors properly and fix
  some desktop rendering problems, amdgpu and intel display changes as
  usual.

  There also changes to the core pagemap, then the usual amouny of AI
  inspired validation fixes.

  core:
   - Fix drm_crtc_commit leak when PAGE_FLIP_EVENT is used

  dma-buf:
   - Publish the dma-buf only after copy_to_user succeeds
   - fix some kernel-doc warnings

  atomic-state-helpers:
   - set pixel_blend_mode to prop default on reset

  sysfb:
   - Fix integer overflow
   - fix constant comparison bug

  pagemap:
   - Prevent double migration of device pages
   - Reset migration page count on eviction retry
   - dma-unmap pages before handling migration errors
   - use after free fixes

  prime:
   - fix prime exports tracing

  amdgpu:
   - Fix for drm_amdgpu_info_device with mixed 64 bit kernel and 32 bit
     userspace
   - plane blend mode fixes
   - SR-IOV fix
   - GFX8 fix
   - MES queue reset fix
   - GPUVM fixes
   - DCN 6 warning fix
   - DCN 3.5/3.6 fix
   - DML fix
   - Backlight fix
   - Colorop fix
   - DC get_estimated_bw() fix
   - devcoredump fix
   - Userq fixes
   - APU PSP fix
   - Cursor fix

  amdkfd:
   - MES queue eviction fix
   - MQD debugfs fix

  xe:
   - oa uapi error handling fix
   - drm info message to report FLAT_CSS base misalignment

  i915:
   - Drop an accidentally duplicated panel fitter call in DP MST
   - Fix DDI clock programming for Cx0 and LT PHY
   - Fix PTL CDCLK handling at probe, causing a glitch
   - Fix dg2_power_well_count() return type
   - Fix a NULL pointer deref at forced probe
   - Fix selective fetch disable

  amdxdna:
   - out-of-bounds access fix
   - reject commands chains with no commands
   - handle chained mapping BO failures
   - refuse to flush an imported BO

  ethosu:
   - handle mmio mapping failures
   - handle storage modes only on hardware that supports it
   - fix job completion fence cleanup

  fastrpc:
   - Publish the dma-buf only after copy_to_user succeeds

  gud:
   - Improve TV modes and rotation handling

  nouveau:
   - use-after-free fixes
   - add missing scanline position support
   - HDMI and DP fixes
   - null pointer dereference fix
   - dmem accounting fixes for large folios
   - use write-combined maps for coherent

  qaic:
   - out-of-bounds access fix

  tegra:
   - Add blend mode properties

  virtio:
   - exit path and error handling fixes

* tag 'drm-fixes-2026-09-05' of https://gitlab.freedesktop.org/drm/kernel: (83 commits)
  drm/xe/vram: report FLAT_CCS base misalignment
  MAINTAINERS, mailmap: use Aditya Garg's linux.dev account
  drm/amd/display: use plane color_mgmt_changed to track colorop changes
  drm/amdgpu/userq: fix struct drm_amdgpu_info_device padding for 32bit compile
  drm/amd/display: Fix cursor disable with horizontally split planes
  drm/amdgpu/userq: dont overwrite the error of subsequent map call
  drm/amdgpu: Skip accessing psp rum time db for APUs
  drm/amdgpu: update the fw version for gfx12 userqueues
  drm/amdgpu: update the fw version for gfx11 userqueues
  drm/amdgpu: fix byte/dword unit mismatch in coredump IB dump
  drm/amdkfd: fix scope of mqd_mgr dereference in pqm_debugfs_mqds
  drm/amd/display: fix division by zero in get_estimated_bw()
  drm/amd/display: use halving distribution for all encode-to-linear curves
  drm/amd/display: Fix backlight control for luminance-capable OLED
  drm/amd/display: Remove const Qualifier From Non-Pointer Fields
  drm/amd/display: Set gpuvm min page size to 4K on dcn35/36
  drm/amd/display: Fix DCN5/6 DML2 compilation warnings
  drm/amdgpu: fix Idle BOs list in VM debugfs status info
  drm/amdgpu: use AMDGPU_GPU_PAGE_SHIFT instead of PAGE_SHIFT
  drm/amdgpu: Update queue reset support version
  ...

Add load-only timer_mim coverage for inner map identities propagated
through nested timer and bpf_for_each_map_elem() callbacks.

The negative case initializes a timer in the second inner map with the map
saved from the first inner map timer callback. The positive case pairs the
timer value with the map supplied to the same for-each callback.

Without the verifier fix, the mismatched-map program is accepted while the
same-map control is rejected. Preserving map_uid reverses both verdicts.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904104203.345917-9-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>