Björn Töpel 416721ff05 riscv, mm: Perform BPF exhandler fixup on page fault ... Commit 21855cac82 ("riscv/mm: Prevent kernel module to access user memory without uaccess routines") added early exits/deaths for page faults stemming from accesses to user-space without using proper uaccess routines (where sstatus.SUM is set). Unfortunatly, this is too strict for some BPF programs, which relies on BPF exhandler fixups. These BPF programs loads "BTF pointers". A BTF pointers could either be a valid kernel pointer or NULL, but not a userspace address. Resolve the problem by calling the fixup handler in the early exit path. Fixes: 21855cac82 ("riscv/mm: Prevent kernel module to access user memory without uaccess routines") Signed-off-by: Björn Töpel <bjorn@rivosinc.com> Link: https://lore.kernel.org/r/20230214162515.184827-1-bjorn@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2023-02-21 17:21:39 -08:00
..
cacheflush.c	Merge patch series "RISC-V: Ensure Zicbom has a valid block size"	2022-12-09 19:13:01 -08:00
context.c	riscv: mm: notify remote harts about mmu cache updates	2022-12-08 15:18:16 -08:00
dma-noncoherent.c	RISC-V: Fix compilation without RISCV_ISA_ZICBOM	2022-10-21 11:52:39 +05:30
extable.c	riscv: extable: fix err reg writing in dedicated uaccess handler	2022-02-08 17:02:47 -08:00
fault.c	riscv, mm: Perform BPF exhandler fixup on page fault	2023-02-21 17:21:39 -08:00
hugetlbpage.c
init.c	RISC-V Patches for the 6.2 Merge Window, Part 1	2022-12-14 15:23:49 -08:00
kasan_init.c	riscv: mm: add missing memcpy in kasan_init	2022-10-27 14:55:58 -07:00
Makefile	Merge patch series "Add PMEM support for RISC-V"	2022-12-08 15:45:28 -08:00
pageattr.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-03 10:13:13 -07:00
pgtable.c	riscv: Enable HAVE_ARCH_HUGE_VMAP for 64BIT	2022-10-28 17:10:01 -07:00
physaddr.c	riscv: Fix crash during early errata patching	2022-12-08 17:22:53 -08:00
pmem.c	RISC-V: Implement arch specific PMEM APIs	2022-12-08 15:43:59 -08:00
ptdump.c
tlbflush.c	riscv: mm: notify remote harts about mmu cache updates	2022-12-08 15:18:16 -08:00