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linux/arch/riscv/include/asm
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Jisheng Zhang a8616d2dc1
riscv: vdso: fix NULL deference in vdso_join_timens() when vfork 
Testing tools/testing/selftests/timens/vfork_exec.c got below
kernel log:

[    6.838454] Unable to handle kernel access to user memory without uaccess routines at virtual address 0000000000000020
[    6.842255] Oops [#1]
[    6.842871] Modules linked in:
[    6.844249] CPU: 1 PID: 64 Comm: vfork_exec Not tainted 6.0.0-rc3-rt15+ #8
[    6.845861] Hardware name: riscv-virtio,qemu (DT)
[    6.848009] epc : vdso_join_timens+0xd2/0x110
[    6.850097]  ra : vdso_join_timens+0xd2/0x110
[    6.851164] epc : ffffffff8000635c ra : ffffffff8000635c sp : ff6000000181fbf0
[    6.852562]  gp : ffffffff80cff648 tp : ff60000000fdb700 t0 : 3030303030303030
[    6.853852]  t1 : 0000000000000030 t2 : 3030303030303030 s0 : ff6000000181fc40
[    6.854984]  s1 : ff60000001e6c000 a0 : 0000000000000010 a1 : ffffffff8005654c
[    6.856221]  a2 : 00000000ffffefff a3 : 0000000000000000 a4 : 0000000000000000
[    6.858114]  a5 : 0000000000000000 a6 : 0000000000000008 a7 : 0000000000000038
[    6.859484]  s2 : ff60000001e6c068 s3 : ff6000000108abb0 s4 : 0000000000000000
[    6.860751]  s5 : 0000000000001000 s6 : ffffffff8089dc40 s7 : ffffffff8089dc38
[    6.862029]  s8 : ffffffff8089dc30 s9 : ff60000000fdbe38 s10: 000000000000005e
[    6.863304]  s11: ffffffff80cc3510 t3 : ffffffff80d1112f t4 : ffffffff80d1112f
[    6.864565]  t5 : ffffffff80d11130 t6 : ff6000000181fa00
[    6.865561] status: 0000000000000120 badaddr: 0000000000000020 cause: 000000000000000d
[    6.868046] [<ffffffff8008dc94>] timens_commit+0x38/0x11a
[    6.869089] [<ffffffff8008dde8>] timens_on_fork+0x72/0xb4
[    6.870055] [<ffffffff80190096>] begin_new_exec+0x3c6/0x9f0
[    6.871231] [<ffffffff801d826c>] load_elf_binary+0x628/0x1214
[    6.872304] [<ffffffff8018ee7a>] bprm_execve+0x1f2/0x4e4
[    6.873243] [<ffffffff8018f90c>] do_execveat_common+0x16e/0x1ee
[    6.874258] [<ffffffff8018f9c8>] sys_execve+0x3c/0x48
[    6.875162] [<ffffffff80003556>] ret_from_syscall+0x0/0x2
[    6.877484] ---[ end trace 0000000000000000 ]---

This is because the mm->context.vdso_info is NULL in vfork case. From
another side, mm->context.vdso_info either points to vdso info
for RV64 or vdso info for compat, there's no need to bloat riscv's
mm_context_t, we can handle the difference when setup the additional
page for vdso.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Suggested-by: Palmer Dabbelt <palmer@rivosinc.com>
Fixes: 3092eb456375 ("riscv: compat: vdso: Add setup additional pages implementation")
Link: https://lore.kernel.org/r/20220924070737.3048-1-jszhang@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-10-13 11:16:52 -07:00
..
vdso
arch/riscv: add Zihintpause support
2022-08-11 08:03:49 -07:00
alternative-macros.h
riscv: Move alternative length validation into subsection
2022-06-02 15:55:22 -07:00
alternative.h
riscv: add memory-type errata for T-Head
2022-05-11 21:36:33 -07:00
asm-extable.h
riscv: extable: add a dedicated uaccess handler
2022-01-05 17:53:29 -08:00
asm-offsets.h
…
asm-prototypes.h
riscv: add VMAP_STACK overflow detection
2021-07-06 12:11:38 -07:00
asm.h
riscv: introduce nops and __nops macros for NOP sequences
2022-07-21 17:17:29 -07:00
atomic.h
riscv: atomic: Add custom conditional atomic operation implementation
2022-05-21 10:31:47 -07:00
barrier.h
riscv: introduce nops and __nops macros for NOP sequences
2022-07-21 17:17:29 -07:00
bitops.h
include: move find.h from asm_generic to linux
2022-01-15 08:47:31 -08:00
bug.h
bug: Use normal relative pointers in 'struct bug_entry'
2022-05-19 23:46:10 +02:00
cache.h
riscv: Add support for non-coherent devices using zicbom extension
2022-07-28 15:30:51 -07:00
cacheflush.h
Merge patch series "Some style cleanups for recent extension additions"
2022-10-13 08:46:31 -07:00
cacheinfo.h
riscv: Add cache information in AUX vector
2020-09-15 18:46:08 -07:00
clint.h
RISC-V: Resurrect the MMIO timer implementation for M-mode systems
2020-09-19 13:21:11 -07:00
clocksource.h
riscv: use vDSO common flow to reduce the latency of the time-related functions
2020-06-10 19:47:16 -07:00
cmpxchg.h
riscv: atomic: Cleanup unnecessary definition
2022-05-21 10:31:45 -07:00
compat.h
riscv: compat: Add basic compat data type implementation
2022-04-26 13:36:12 -07:00
cpu_ops_sbi.h
riscv: ensure cpu_ops_sbi is declared
2022-08-11 13:46:51 -07:00
cpu_ops.h
RISC-V: Declare cpu_ops_spinwait in <asm/cpu_ops.h>
2022-08-11 13:06:47 -07:00
cpuidle.h
RISC-V: Enable CPU_IDLE drivers
2022-03-10 09:29:21 -08:00
csr.h
RISC-V: Add Sstc extension support
2022-08-11 14:41:52 -07:00
current.h
riscv: Rename "sp_in_global" to "current_stack_pointer"
2022-03-30 15:15:27 -07:00
delay.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286
2019-06-05 17:36:37 +02:00
efi.h
efi: Simplify arch_efi_call_virt() macro
2022-06-28 20:13:09 +02:00
elf.h
riscv: Add cache information in AUX vector
2022-10-13 11:06:56 -07:00
errata_list.h
riscv: implement Zicbom-based CMO instructions + the t-head variant
2022-08-10 20:49:32 -07:00
extable.h
riscv: extable: add type and data fields
2022-01-05 17:52:54 -08:00
fence.h
…
fixmap.h
riscv: remove FIXMAP_PAGE_IO and fall back to its default value
2022-05-11 21:36:33 -07:00
ftrace.h
riscv: Workaround mcount name prior to clang-13
2021-04-26 08:25:01 -07:00
futex.h
riscv: extable: add a dedicated uaccess handler
2022-01-05 17:53:29 -08:00
gdb_xml.h
riscv: Avoid kgdb.h including gdb_xml.h to solve unused-const-variable warning
2020-07-09 20:12:28 -07:00
gpr-num.h
riscv: add gpr-num.h
2022-01-05 17:53:05 -08:00
hugetlb.h
mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags()
2020-06-03 20:09:46 -07:00
hwcap.h
RISC-V: Add Sstc extension support
2022-08-11 14:41:52 -07:00
image.h
RISC-V: Typo fixes in image header and documentation.
2019-12-19 09:32:45 -07:00
io.h
RISC-V: Use asm-generic for {in,out}{bwlq}
2021-06-30 20:55:40 -07:00
irq_work.h
riscv: Fix irq_work when SMP is disabled
2022-06-01 21:46:31 -07:00
irq.h
riscv: irq: Fix no prototype warning
2021-03-09 20:46:00 -08:00
irqflags.h
riscv: abstract out CSR names for supervisor vs machine mode
2019-11-05 09:20:42 -08:00
jump_label.h
riscv: Add jump-label implementation
2020-07-30 11:37:43 -07:00
kasan.h
riscv: Implement sv48 support
2022-01-19 17:54:09 -08:00
Kbuild
RISC-V: Move to queued RW locks
2022-05-11 11:50:10 -07:00
kdebug.h
riscv: Add KGDB support
2020-05-18 11:38:10 -07:00
kexec.h
RISC-V: Prepare dropping week attribute from arch_kexec_apply_relocations[_add]
2022-05-30 16:04:37 -07:00
kfence.h
riscv: Enable KFENCE for riscv64
2021-06-30 20:55:41 -07:00
kgdb.h
riscv: Avoid kgdb.h including gdb_xml.h to solve unused-const-variable warning
2020-07-09 20:12:28 -07:00
kprobes.h
kprobes: treewide: Make it harder to refer kretprobe_trampoline directly
2021-09-30 21:24:06 -04:00
kvm_host.h
RISC-V: KVM: Add G-stage ioremap() and iounmap() functions
2022-07-29 17:15:06 +05:30
kvm_types.h
KVM: RISC-V: Use common KVM implementation of MMU memory caches
2022-01-06 14:38:50 +05:30
kvm_vcpu_fp.h
RISC-V: KVM: Improve ISA extension by using a bitmap
2022-07-29 17:14:11 +05:30
kvm_vcpu_insn.h
RISC-V: KVM: Add extensible CSR emulation framework
2022-07-29 17:14:53 +05:30
kvm_vcpu_sbi.h
riscv: kvm: move extern sbi_ext declarations to a header
2022-08-19 23:22:47 +05:30
kvm_vcpu_timer.h
RISC-V: KVM: Support sstc extension
2022-08-12 07:43:57 -07:00
linkage.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286
2019-06-05 17:36:37 +02:00
mmio.h
riscv: Use generic pgprot_* macros from <linux/pgtable.h>
2020-07-30 11:37:46 -07:00
mmiowb.h
riscv: mmiowb: Fix implicit declaration of function 'smp_processor_id'
2020-05-13 17:11:46 -07:00
mmu_context.h
riscv: add ASID-based tlbflushing methods
2021-06-30 20:55:39 -07:00
mmu.h
riscv: vdso: fix NULL deference in vdso_join_timens() when vfork
2022-10-13 11:16:52 -07:00
mmzone.h
riscv: Add numa support for riscv64 platform
2021-01-14 15:08:58 -08:00
module.h
arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
2020-04-23 10:50:26 +09:00
module.lds.h
riscv module: remove (NOLOAD)
2022-03-29 14:31:07 -07:00
numa.h
riscv: Add numa support for riscv64 platform
2021-01-14 15:08:58 -08:00
page.h
arch/*/: remove CONFIG_VIRT_TO_BUS
2022-06-28 13:20:21 +02:00
parse_asm.h
riscv: Add SW single-step support for KDB
2020-05-18 11:38:12 -07:00
patch.h
riscv: Remove the 'riscv_' prefix of function name
2020-05-18 11:38:13 -07:00
pci.h
RISC-V Patches for the 5.20 Merge Window, Part 1
2022-08-06 15:04:48 -07:00
perf_event.h
RISC-V: Remove the current perf implementation
2022-03-21 14:58:12 -07:00
pgalloc.h
riscv: mm: Control p4d's folding by pgtable_l5_enabled
2022-02-14 16:32:39 -08:00
pgtable-32.h
riscv: add RISC-V Svpbmt extension support
2022-05-11 21:36:33 -07:00
pgtable-64.h
riscv: Fix missing PAGE_PFN_MASK
2022-07-11 09:33:35 +05:30
pgtable-bits.h
riscv: add RISC-V Svpbmt extension support
2022-05-11 21:36:33 -07:00
pgtable.h
- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe
2022-08-05 16:32:45 -07:00
probes.h
riscv: Add kprobes supported
2021-01-14 15:09:06 -08:00
processor.h
riscv: cpu: Add 64bit hartid support on RV64
2022-07-19 16:39:14 -07:00
ptdump.h
riscv: support DEBUG_WX
2020-06-03 20:09:50 -07:00
ptrace.h
riscv: ptrace: add argn syntax
2021-07-05 20:53:09 -07:00
sbi.h
RISC-V: Improve SBI definitions
2022-08-11 14:58:32 -07:00
seccomp.h
riscv: Enable seccomp architecture tracking
2020-11-20 11:16:35 -08:00
sections.h
riscv: Map the kernel with correct permissions the first time
2021-06-30 21:18:58 -07:00
set_memory.h
riscv: Map the kernel with correct permissions the first time
2021-06-30 21:18:58 -07:00
signal32.h
riscv: compat: signal: Add rt_frame implementation
2022-05-17 16:37:21 -07:00
signal.h
riscv: signal: fix missing prototype warning
2022-08-18 14:42:52 -07:00
smp.h
riscv: smp: Add 64bit hartid support on RV64
2022-07-19 16:39:09 -07:00
soc.h
riscv: Fix builtin DTB handling
2021-01-07 19:00:50 -08:00
sparsemem.h
riscv: Allow to dynamically define VA_BITS
2022-01-19 17:54:07 -08:00
stackprotector.h
riscv: Enable per-task stack canaries
2021-01-14 15:09:10 -08:00
stacktrace.h
riscv: Add dump stack in show_regs
2021-01-14 15:09:11 -08:00
string.h
riscv: Add ARCH_HAS_FORTIFY_SOURCE
2021-03-09 18:18:31 -08:00
suspend.h
RISC-V: Add arch functions for non-retentive suspend entry/exit
2022-03-10 09:29:31 -08:00
switch_to.h
riscv: switch has_fpu() to the unified static key mechanism
2022-06-16 10:51:31 -07:00
syscall.h
riscv: compat: syscall: Add compat_sys_call_table implementation
2022-04-26 13:36:25 -07:00
thread_info.h
riscv: traps: add missing prototype
2022-08-18 14:42:58 -07:00
timex.h
riscv: use fallback for random_get_entropy() instead of zero
2022-05-13 23:59:23 +02:00
tlb.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286
2019-06-05 17:36:37 +02:00
tlbflush.h
riscv: fix build error when CONFIG_SMP is disabled
2021-06-08 17:05:03 -07:00
uaccess.h
uaccess: generalize access_ok()
2022-02-25 09:36:05 +01:00
unistd.h
riscv: Wire up memfd_secret in UAPI header
2022-06-01 21:46:36 -07:00
uprobes.h
riscv: Add uprobes supported
2021-01-14 15:09:08 -08:00
vdso.h
riscv: compat: vdso: Add COMPAT_VDSO base code implementation
2022-04-26 13:36:53 -07:00
vendorid_list.h
riscv: add memory-type errata for T-Head
2022-05-11 21:36:33 -07:00
vermagic.h
arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
2020-04-23 10:50:26 +09:00
vmalloc.h
mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h>
2019-12-10 10:12:55 +01:00
word-at-a-time.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286
2019-06-05 17:36:37 +02:00
xip_fixup.h
RISC-V: Split out the XIP fixups into their own file
2022-05-25 14:43:33 -07:00