Björn Töpel 1ce70a9ef9 riscv, kprobes: Stricter c.jr/c.jalr decoding ... commit b2d473a601 upstream. In the compressed instruction extension, c.jr, c.jalr, c.mv, and c.add is encoded the following way (each instruction is 16b): ---+-+-----------+-----------+-- 100 0 rs1[4:0]!=0 00000 10 : c.jr 100 1 rs1[4:0]!=0 00000 10 : c.jalr 100 0 rd[4:0]!=0 rs2[4:0]!=0 10 : c.mv 100 1 rd[4:0]!=0 rs2[4:0]!=0 10 : c.add The following logic is used to decode c.jr and c.jalr: insn & 0xf007 == 0x8002 => instruction is an c.jr insn & 0xf007 == 0x9002 => instruction is an c.jalr When 0xf007 is used to mask the instruction, c.mv can be incorrectly decoded as c.jr, and c.add as c.jalr. Correct the decoding by changing the mask from 0xf007 to 0xf07f. Fixes: c22b0bcb1d ("riscv: Add kprobes supported") Signed-off-by: Björn Töpel <bjorn@rivosinc.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20230102160748.1307289-1-bjorn@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-01-12 12:00:47 +01:00
..
boot	riscv: dts: sifive unleashed: Add PWM controlled LEDs	2022-12-02 17:42:59 +01:00
configs	riscv: enable Docker requirements in defconfig	2022-07-22 13:43:28 -07:00
errata	RISC-V: Clean up the Zicbom block size probing	2022-09-13 02:06:11 -07:00
include	riscv: uaccess: fix type of 0 variable on error in get_user()	2023-01-12 12:00:47 +01:00
kernel	riscv, kprobes: Stricter c.jr/c.jalr decoding	2023-01-12 12:00:47 +01:00
kvm	RISC-V: KVM: Fix reg_val check in kvm_riscv_vcpu_set_reg_config()	2022-12-31 13:26:35 +01:00
lib	riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit	2022-08-10 14:06:31 -07:00
mm	riscv: mm: notify remote harts about mmu cache updates	2023-01-07 11:15:57 +01:00
net	riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC	2022-12-31 13:26:09 +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	riscv: Fixup compile error with !MMU	2023-01-07 11:15:57 +01:00
Kconfig.debug	…
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	riscv: fix detection of toolchain Zihintpause support	2022-11-04 00:00:35 +09:00