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elfcore: Add a cprm parameter to elf_core_extra_{phdrs,data_size}

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A subsequent fix for arm64 will use this parameter to parse the vma
information from the snapshot created by dump_vma_snapshot() rather than
traversing the vma list without the mmap_lock.

Fixes: 6dd8b1a0b6 ("arm64: mte: Dump the MTE tags in the core file")
Cc: <stable@vger.kernel.org> # 5.18.x
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Seth Jenkins <sethjenkins@google.com>
Suggested-by: Seth Jenkins <sethjenkins@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222181251.1345752-3-catalin.marinas@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Catalin Marinas 2022-12-22 18:12:50 +00:00 committed by Will Deacon
parent 736eedc974
commit 19e183b545
6 changed files with 14 additions and 14 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
arch/arm64/kernel/elfcore.c
View file

@ -76,7 +76,7 @@ static int mte_dump_tag_range(struct coredump_params *cprm,
return ret; return ret;
} }
Elf_Half elf_core_extra_phdrs(void) Elf_Half elf_core_extra_phdrs(struct coredump_params *cprm)
{ {
struct vm_area_struct *vma; struct vm_area_struct *vma;
int vma_count = 0; int vma_count = 0;
@ -113,7 +113,7 @@ int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
return 1; return 1;
} }
size_t elf_core_extra_data_size(void) size_t elf_core_extra_data_size(struct coredump_params *cprm)
{ {
struct vm_area_struct *vma; struct vm_area_struct *vma;
size_t data_size = 0; size_t data_size = 0;

4
arch/ia64/kernel/elfcore.c
View file

@ -7,7 +7,7 @@
#include <asm/elf.h> #include <asm/elf.h>
Elf64_Half elf_core_extra_phdrs(void) Elf64_Half elf_core_extra_phdrs(struct coredump_params *cprm)
{ {
return GATE_EHDR->e_phnum; return GATE_EHDR->e_phnum;
} }
@ -60,7 +60,7 @@ int elf_core_write_extra_data(struct coredump_params *cprm)
return 1; return 1;
} }
size_t elf_core_extra_data_size(void) size_t elf_core_extra_data_size(struct coredump_params *cprm)
{ {
const struct elf_phdr *const gate_phdrs = const struct elf_phdr *const gate_phdrs =
(const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff); (const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);

4
arch/x86/um/elfcore.c
View file

@ -7,7 +7,7 @@
#include <asm/elf.h> #include <asm/elf.h>
Elf32_Half elf_core_extra_phdrs(void) Elf32_Half elf_core_extra_phdrs(struct coredump_params *cprm)
{ {
return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0; return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
} }
@ -60,7 +60,7 @@ int elf_core_write_extra_data(struct coredump_params *cprm)
return 1; return 1;
} }
size_t elf_core_extra_data_size(void) size_t elf_core_extra_data_size(struct coredump_params *cprm)
{ {
if ( vsyscall_ehdr ) { if ( vsyscall_ehdr ) {
const struct elfhdr *const ehdrp = const struct elfhdr *const ehdrp =

4
fs/binfmt_elf.c
View file

@ -2034,7 +2034,7 @@ static int elf_core_dump(struct coredump_params *cprm)
* The number of segs are recored into ELF header as 16bit value. * The number of segs are recored into ELF header as 16bit value.
* Please check DEFAULT_MAX_MAP_COUNT definition when you modify here. * Please check DEFAULT_MAX_MAP_COUNT definition when you modify here.
*/ */
segs = cprm->vma_count + elf_core_extra_phdrs(); segs = cprm->vma_count + elf_core_extra_phdrs(cprm);
/* for notes section */ /* for notes section */
segs++; segs++;
@ -2074,7 +2074,7 @@ static int elf_core_dump(struct coredump_params *cprm)
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
offset += cprm->vma_data_size; offset += cprm->vma_data_size;
offset += elf_core_extra_data_size(); offset += elf_core_extra_data_size(cprm);
e_shoff = offset; e_shoff = offset;
if (e_phnum == PN_XNUM) { if (e_phnum == PN_XNUM) {

4
fs/binfmt_elf_fdpic.c
View file

@ -1509,7 +1509,7 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
tmp->next = thread_list; tmp->next = thread_list;
thread_list = tmp; thread_list = tmp;
segs = cprm->vma_count + elf_core_extra_phdrs(); segs = cprm->vma_count + elf_core_extra_phdrs(cprm);
/* for notes section */ /* for notes section */
segs++; segs++;
@ -1555,7 +1555,7 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
offset += cprm->vma_data_size; offset += cprm->vma_data_size;
offset += elf_core_extra_data_size(); offset += elf_core_extra_data_size(cprm);
e_shoff = offset; e_shoff = offset;
if (e_phnum == PN_XNUM) { if (e_phnum == PN_XNUM) {

8
include/linux/elfcore.h
View file

@ -105,14 +105,14 @@ int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
* Dumping its extra ELF program headers includes all the other information * Dumping its extra ELF program headers includes all the other information
* a debugger needs to easily find how the gate DSO was being used. * a debugger needs to easily find how the gate DSO was being used.
*/ */
extern Elf_Half elf_core_extra_phdrs(void); extern Elf_Half elf_core_extra_phdrs(struct coredump_params *cprm);
extern int extern int
elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
extern int extern int
elf_core_write_extra_data(struct coredump_params *cprm); elf_core_write_extra_data(struct coredump_params *cprm);
extern size_t elf_core_extra_data_size(void); extern size_t elf_core_extra_data_size(struct coredump_params *cprm);
#else #else
static inline Elf_Half elf_core_extra_phdrs(void) static inline Elf_Half elf_core_extra_phdrs(struct coredump_params *cprm)
{ {
return 0; return 0;
} }
@ -127,7 +127,7 @@ static inline int elf_core_write_extra_data(struct coredump_params *cprm)
return 1; return 1;
} }
static inline size_t elf_core_extra_data_size(void) static inline size_t elf_core_extra_data_size(struct coredump_params *cprm)
{ {
return 0; return 0;
} }