From: "Eric W. Biederman" ebiederm@xmission.com
stable inclusion from stable-v5.10.110 commit b7933f145ad32bb5e084af55176ab6dcaa15a036 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6KT9C CVE: CVE-2023-1249
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------
commit 9ec7d3230717b4fe9b6c7afeb4811909c23fa1d7 upstream.
Instead of individually passing cprm->siginfo and cprm->regs into fill_note_info pass all of struct coredump_params.
This is preparation to allow fill_files_note to use the existing vma snapshot.
Reviewed-by: Jann Horn jannh@google.com Reviewed-by: Kees Cook keescook@chromium.org Signed-off-by: "Eric W. Biederman" ebiederm@xmission.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Li Huafei lihuafei1@huawei.com Reviewed-by: Xu Kuohai xukuohai@huawei.com Reviewed-by: Xiu Jianfeng xiujianfeng@huawei.com Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- fs/binfmt_elf.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 7143727d927f..edfb30de3143 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1797,7 +1797,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t,
static int fill_note_info(struct elfhdr *elf, int phdrs, struct elf_note_info *info, - const kernel_siginfo_t *siginfo, struct pt_regs *regs) + struct coredump_params *cprm) { struct task_struct *dump_task = current; const struct user_regset_view *view = task_user_regset_view(dump_task); @@ -1869,7 +1869,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, * Now fill in each thread's information. */ for (t = info->thread; t != NULL; t = t->next) - if (!fill_thread_core_info(t, view, siginfo->si_signo, &info->size)) + if (!fill_thread_core_info(t, view, cprm->siginfo->si_signo, &info->size)) return 0;
/* @@ -1878,7 +1878,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, fill_psinfo(psinfo, dump_task->group_leader, dump_task->mm); info->size += notesize(&info->psinfo);
- fill_siginfo_note(&info->signote, &info->csigdata, siginfo); + fill_siginfo_note(&info->signote, &info->csigdata, cprm->siginfo); info->size += notesize(&info->signote);
fill_auxv_note(&info->auxv, current->mm); @@ -2026,7 +2026,7 @@ static int elf_note_info_init(struct elf_note_info *info)
static int fill_note_info(struct elfhdr *elf, int phdrs, struct elf_note_info *info, - const kernel_siginfo_t *siginfo, struct pt_regs *regs) + struct coredump_params *cprm) { struct core_thread *ct; struct elf_thread_status *ets; @@ -2047,13 +2047,13 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, list_for_each_entry(ets, &info->thread_list, list) { int sz;
- sz = elf_dump_thread_status(siginfo->si_signo, ets); + sz = elf_dump_thread_status(cprm->siginfo->si_signo, ets); info->thread_status_size += sz; } /* now collect the dump for the current */ memset(info->prstatus, 0, sizeof(*info->prstatus)); - fill_prstatus(info->prstatus, current, siginfo->si_signo); - elf_core_copy_regs(&info->prstatus->pr_reg, regs); + fill_prstatus(info->prstatus, current, cprm->siginfo->si_signo); + elf_core_copy_regs(&info->prstatus->pr_reg, cprm->regs);
/* Set up header */ fill_elf_header(elf, phdrs, ELF_ARCH, ELF_CORE_EFLAGS); @@ -2069,7 +2069,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, fill_note(info->notes + 1, "CORE", NT_PRPSINFO, sizeof(*info->psinfo), info->psinfo);
- fill_siginfo_note(info->notes + 2, &info->csigdata, siginfo); + fill_siginfo_note(info->notes + 2, &info->csigdata, cprm->siginfo); fill_auxv_note(info->notes + 3, current->mm); info->numnote = 4;
@@ -2079,8 +2079,8 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, }
/* Try to dump the FPU. */ - info->prstatus->pr_fpvalid = elf_core_copy_task_fpregs(current, regs, - info->fpu); + info->prstatus->pr_fpvalid = + elf_core_copy_task_fpregs(current, cprm->regs, info->fpu); if (info->prstatus->pr_fpvalid) fill_note(info->notes + info->numnote++, "CORE", NT_PRFPREG, sizeof(*info->fpu), info->fpu); @@ -2193,7 +2193,7 @@ static int elf_core_dump(struct coredump_params *cprm) * Collect all the non-memory information about the process for the * notes. This also sets up the file header. */ - if (!fill_note_info(&elf, e_phnum, &info, cprm->siginfo, cprm->regs)) + if (!fill_note_info(&elf, e_phnum, &info, cprm)) goto end_coredump;
has_dumped = 1;