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
..
compat_vdso
probes	riscv, kprobes: Stricter c.jr/c.jalr decoding	2023-01-12 12:00:47 +01:00
vdso	riscv: vdso: fix section overlapping under some conditions	2022-12-08 11:30:18 +01:00
.gitignore
alternative.c
asm-offsets.c
cacheinfo.c
compat_signal.c
compat_syscall_table.c
cpu-hotplug.c
cpu.c
cpu_ops.c
cpu_ops_sbi.c
cpu_ops_spinwait.c
cpufeature.c
crash_dump.c
crash_save_regs.S
efi-header.S
efi.c
elf_kexec.c	RISC-V: kexec: Fix memory leak of elf header buffer	2023-01-07 11:15:57 +01:00
entry.S	RISC-V: Fix unannoted hardirqs-on in return to userspace slow-path	2022-12-31 13:26:23 +01:00
fpu.S
ftrace.c
head.h
head.S
image-vars.h
irq.c
jump_label.c
kexec_relocate.S
kgdb.c
machine_kexec.c	riscv: kexec: Fixup irq controller broken in kexec crash path	2022-12-08 11:30:21 +01:00
machine_kexec_file.c
Makefile
mcount-dyn.S
mcount.S
module-sections.c
module.c
patch.c
perf_callchain.c
perf_regs.c
process.c
ptrace.c
reset.c
riscv_ksyms.c
sbi.c
setup.c	riscv: mm: Proper page permissions after initmem free	2022-12-08 11:30:18 +01:00
signal.c	RISC-V: Fix unannoted hardirqs-on in return to userspace slow-path	2022-12-31 13:26:23 +01:00
smp.c
smpboot.c
soc.c
stacktrace.c	riscv: stacktrace: Fixup ftrace_graph_ret_addr retp argument	2023-01-07 11:15:57 +01:00
suspend.c
suspend_entry.S
sys_riscv.c
syscall_table.c
time.c
trace_irq.c
trace_irq.h
traps.c	RISC-V: Align the shadow stack	2022-12-31 13:26:23 +01:00
traps_misaligned.c
vdso.c
vmlinux-xip.lds.S
vmlinux.lds.S