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6510c78490c490a6636e48b61eeaa6fb65981f4b
linux/arch/riscv/kernel
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Jisheng Zhang 6510c78490 riscv: process: fix kernel info leakage 
thread_struct's s[12] may contain random kernel memory content, which
may be finally leaked to userspace. This is a security hole. Fix it
by clearing the s[12] array in thread_struct when fork.

As for kthread case, it's better to clear the s[12] array as well.

Fixes: 7db91e57a0 ("RISC-V: Task implementation")
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Tested-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20221029113450.4027-1-jszhang@kernel.org
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/CAJF2gTSdVyAaM12T%2B7kXAdRPGS4VyuO08X1c7paE-n4Fr8OtRA@mail.gmail.com/
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-11-10 13:43:15 -08:00
..
compat_vdso
riscv: compat: vdso: Add COMPAT_VDSO base code implementation
2022-04-26 13:36:53 -07:00
probes
riscv:uprobe fix SR_SPIE set/clear handling
2022-08-11 14:14:52 -07:00
vdso
riscv: compat: vdso: Add COMPAT_VDSO base code implementation
2022-04-26 13:36:53 -07:00
.gitignore
…
alternative.c
riscv: make patch-function pointer more generic in cpu_manufacturer_info struct
2022-06-16 15:47:40 -07:00
asm-offsets.c
RISC-V: Add arch functions for non-retentive suspend entry/exit
2022-03-10 09:29:31 -08:00
cacheinfo.c
drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()
2021-09-01 10:29:10 +02:00
compat_signal.c
riscv: compat: signal: Add rt_frame implementation
2022-05-17 16:37:21 -07:00
compat_syscall_table.c
riscv: compat: syscall: Add compat_sys_call_table implementation
2022-04-26 13:36:25 -07:00
cpu_ops_sbi.c
riscv: cpu_ops_sbi: Add 64bit hartid support on RV64
2022-07-19 16:38:58 -07:00
cpu_ops_spinwait.c
RISC-V: cpu_ops_spinwait.c should include head.h
2022-08-11 13:24:16 -07:00
cpu_ops.c
riscv: ensure cpu_ops_sbi is declared
2022-08-11 13:46:51 -07:00
cpu-hotplug.c
riscv: cpu-hotplug: clear cpu from numa map when teardown
2022-02-10 09:16:50 -08:00
cpu.c
RISC-V: Fix /proc/cpuinfo cpumask warning
2022-10-27 15:23:19 -07:00
cpufeature.c
Merge tag 'riscv-for-linus-6.1-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2022-10-14 11:21:11 -07:00
crash_dump.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
crash_save_regs.S
RISC-V: Fixup get incorrect user mode PC for kernel mode regs
2022-08-11 08:54:40 -07:00
efi-header.S
RISC-V: Add PE/COFF header for EFI stub
2020-10-02 14:31:16 -07:00
efi.c
riscv: read-only pages should not be writable
2022-05-28 11:39:31 +02:00
elf_kexec.c
RISCV: kexec: Fix build error without CONFIG_MODULES
2022-07-14 14:23:33 -07:00
entry.S
context_tracking: Split user tracking Kconfig
2022-06-29 17:04:09 -07:00
fpu.S
…
ftrace.c
ftrace: Remove return value of ftrace_arch_modify_*()
2022-05-26 21:13:00 -04:00
head.h
RISC-V: Move spinwait booting method to its own config
2022-01-20 09:27:16 -08:00
head.S
riscv: Initialize thread pointer before calling C functions
2022-06-01 21:46:23 -07:00
image-vars.h
efi/libstub: use EFI provided memcpy/memset routines
2022-09-17 15:13:21 +02:00
irq.c
RISC-V: Remove do_IRQ() function
2020-06-09 19:11:24 -07:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kexec_relocate.S
riscv: Don't use va_pa_offset on kdump
2022-01-09 10:38:06 -08:00
kgdb.c
riscv: Fix "no previous prototype" compile warning in kgdb.c file
2020-07-09 20:09:30 -07:00
machine_kexec_file.c
RISC-V: Add kexec_file support
2022-05-19 12:14:18 -07:00
machine_kexec.c
RISC-V: Fixup schedule out issue in machine_crash_shutdown()
2022-08-11 08:54:46 -07:00
Makefile
kbuild: use obj-y instead extra-y for objects placed at the head
2022-10-02 18:04:05 +09:00
mcount-dyn.S
riscv: Using PATCHABLE_FUNCTION_ENTRY instead of MCOUNT
2021-01-14 15:09:05 -08:00
mcount.S
riscv: Workaround mcount name prior to clang-13
2021-04-26 08:25:01 -07:00
module-sections.c
…
module.c
riscv: implement module alternatives
2022-05-11 21:36:31 -07:00
patch.c
riscv: patch_text: Fixup last cpu should be master
2022-04-22 08:29:24 -07:00
perf_callchain.c
riscv: Fix fill_callchain return value
2022-03-30 23:01:42 -07:00
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
process.c
riscv: process: fix kernel info leakage
2022-11-10 13:43:15 -08:00
ptrace.c
riscv: compat: ptrace: Add compat_arch_ptrace implement
2022-05-17 16:37:22 -07:00
reset.c
riscv: Use do_kernel_power_off()
2022-05-19 19:30:30 +02:00
riscv_ksyms.c
riscv: provide memmove implementation
2020-12-10 17:27:54 -08:00
sbi.c
RISC-V: Fix IPI/RFENCE hmask on non-monotonic hartid ordering
2022-02-14 12:27:45 -08:00
setup.c
riscv: always honor the CONFIG_CMDLINE_FORCE when parsing dtb
2022-10-11 19:53:08 -07:00
signal.c
riscv: fix a nasty sigreturn bug...
2022-09-17 01:48:23 -07:00
smp.c
Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2022-08-07 10:03:24 -07:00
smpboot.c
riscv: topology: fix default topology reporting
2022-08-15 22:07:34 +01:00
soc.c
riscv: Fix builtin DTB handling
2021-01-07 19:00:50 -08:00
stacktrace.c
riscv: Rename "sp_in_global" to "current_stack_pointer"
2022-03-30 15:15:27 -07:00
suspend_entry.S
RISC-V: Split out the XIP fixups into their own file
2022-05-25 14:43:33 -07:00
suspend.c
RISC-V: Add arch functions for non-retentive suspend entry/exit
2022-03-10 09:29:31 -08:00
sys_riscv.c
riscv: Allow PROT_WRITE-only mmap()
2022-09-22 09:44:59 -07:00
syscall_table.c
riscv/vdso: Refactor asm/vdso.h
2021-10-02 13:42:23 -07:00
time.c
Merge tag 'riscv-for-linus-5.13-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2021-05-06 09:24:18 -07:00
trace_irq.c
riscv: fix oops caused by irqsoff latency tracer
2022-02-24 20:30:30 -08:00
trace_irq.h
riscv: fix oops caused by irqsoff latency tracer
2022-02-24 20:30:30 -08:00
traps_misaligned.c
riscv: traps_misaligned: do not duplicate stringify
2022-08-11 08:56:53 -07:00
traps.c
RISC-V: Avoid dereferening NULL regs in die()
2022-10-12 22:02:49 -07:00
vdso.c
Merge tag 'riscv-for-linus-6.1-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2022-10-14 11:21:11 -07:00
vmlinux-xip.lds.S
riscv: vmlinux.lds.S|vmlinux-xip.lds.S: remove .fixup section
2022-01-05 17:53:37 -08:00
vmlinux.lds.S
riscv: vmlinux.lds.S|vmlinux-xip.lds.S: remove .fixup section
2022-01-05 17:53:37 -08:00