kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-04 19:54:59 +00:00
Code Issues Releases Packages Activity
linux/arch/riscv
History
Pu Lehui b54b600361 riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC 
For BPF_PSEUDO_FUNC instruction, verifier will refill imm with
correct addresses of bpf_calls and then run last pass of JIT.
Since the emit_imm of RV64 is variable-length, which will emit
appropriate length instructions accorroding to the imm, it may
broke ctx->offset, and lead to unpredictable problem, such as
inaccurate jump. So let's fix it with fixed-length instructions.

Fixes: 69c087ba62 ("bpf: Add bpf_for_each_map_elem() helper")
Suggested-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20221206091410.1584784-1-pulehui@huaweicloud.com
History 2022-12-06 20:59:27 +01:00
..
boot riscv: dts: sifive unleashed: Add PWM controlled LEDs 2022-10-28 15:27:42 -07:00
configs riscv: enable CD-ROM file systems in defconfig 2022-08-25 17:01:09 -07:00
errata Merge patch series "Some style cleanups for recent extension additions" 2022-10-13 08:46:31 -07:00
include RISC-V Fixes for 6.1-rc3 2022-10-28 17:03:00 -07:00
kernel RISC-V: vdso: Do not add missing symbols to version section in linker script 2022-11-10 15:06:14 -08:00
kvm RISC-V: KVM: Fix kvm_riscv_vcpu_timer_pending() for Sstc 2022-10-21 11:52:45 +05:30
lib riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit 2022-08-10 14:06:31 -07:00
mm RISC-V Fixes for 6.1-rc5 2022-11-11 09:40:19 -08:00
net riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC 2022-12-06 20:59:27 +01:00
purgatory riscv/purgatory: Omit use of bin2c 2022-08-11 09:32:34 -07:00
Kbuild riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild 2022-06-01 22:26:32 -07:00
Kconfig Merge patch series "Fix RISC-V toolchain extension support detection" 2022-10-27 15:14:07 -07:00
Kconfig.debug RISC-V: Remove EARLY_PRINTK support 2018-12-17 10:23:46 -08:00
Kconfig.erratas riscv: make t-head erratas depend on MMU 2022-09-17 01:48:22 -07:00
Kconfig.socs riscv: Kconfig: Style cleanups 2022-06-30 19:26:16 -07:00
Makefile Merge patch series "Fix RISC-V toolchain extension support detection" 2022-10-27 15:14:07 -07:00