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-rw-r--r--fs/coredump.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/coredump.c b/fs/coredump.c
index 7bad7785e8e6..de78bde2991b 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -68,7 +68,10 @@ struct core_name {
static int expand_corename(struct core_name *cn, int size)
{
- char *corename = krealloc(cn->corename, size, GFP_KERNEL);
+ char *corename;
+
+ size = kmalloc_size_roundup(size);
+ corename = krealloc(cn->corename, size, GFP_KERNEL);
if (!corename)
return -ENOMEM;
@@ -76,7 +79,7 @@ static int expand_corename(struct core_name *cn, int size)
if (size > core_name_size) /* racy but harmless */
core_name_size = size;
- cn->size = ksize(corename);
+ cn->size = size;
cn->corename = corename;
return 0;
}
@@ -325,6 +328,10 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm,
err = cn_printf(cn, "%lu",
rlimit(RLIMIT_CORE));
break;
+ /* CPU the task ran on */
+ case 'C':
+ err = cn_printf(cn, "%d", cprm->cpu);
+ break;
default:
break;
}
@@ -525,7 +532,6 @@ void do_coredump(const kernel_siginfo_t *siginfo)
static atomic_t core_dump_count = ATOMIC_INIT(0);
struct coredump_params cprm = {
.siginfo = siginfo,
- .regs = signal_pt_regs(),
.limit = rlimit(RLIMIT_CORE),
/*
* We must use the same mm->flags while dumping core to avoid
@@ -534,6 +540,7 @@ void do_coredump(const kernel_siginfo_t *siginfo)
*/
.mm_flags = mm->flags,
.vma_meta = NULL,
+ .cpu = raw_smp_processor_id(),
};
audit_core_dumps(siginfo->si_signo);
@@ -716,8 +723,8 @@ void do_coredump(const kernel_siginfo_t *siginfo)
* filesystem.
*/
mnt_userns = file_mnt_user_ns(cprm.file);
- if (!uid_eq(i_uid_into_mnt(mnt_userns, inode),
- current_fsuid())) {
+ if (!vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode),
+ current_fsuid())) {
pr_info_ratelimited("Core dump to %s aborted: cannot preserve file owner\n",
cn.corename);
goto close_fail;
@@ -853,7 +860,7 @@ static int dump_emit_page(struct coredump_params *cprm, struct page *page)
if (dump_interrupted())
return 0;
pos = file->f_pos;
- iov_iter_bvec(&iter, WRITE, &bvec, 1, PAGE_SIZE);
+ iov_iter_bvec(&iter, ITER_SOURCE, &bvec, 1, PAGE_SIZE);
n = __kernel_write_iter(cprm->file, &iter, &pos);
if (n != PAGE_SIZE)
return 0;