4.19-stable review patch. If anyone has any objections, please let me know.
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From: Sven Schnelle svens@linux.ibm.com
commit e240b0fde52f33670d1336697c22d90a4fe33c84 upstream.
To prevent unitialized members, use kzalloc to allocate the xol area.
Fixes: b059a453b1cf1 ("x86/vdso: Add mremap hook to vm_special_mapping") Signed-off-by: Sven Schnelle svens@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Acked-by: Oleg Nesterov oleg@redhat.com Link: https://lore.kernel.org/r/20240903102313.3402529-1-svens@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/events/uprobes.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1187,7 +1187,7 @@ static struct xol_area *__create_xol_are uprobe_opcode_t insn = UPROBE_SWBP_INSN; struct xol_area *area;
- area = kmalloc(sizeof(*area), GFP_KERNEL); + area = kzalloc(sizeof(*area), GFP_KERNEL); if (unlikely(!area)) goto out;
@@ -1197,7 +1197,6 @@ static struct xol_area *__create_xol_are goto free_area;
area->xol_mapping.name = "[uprobes]"; - area->xol_mapping.fault = NULL; area->xol_mapping.pages = area->pages; area->pages[0] = alloc_page(GFP_HIGHUSER); if (!area->pages[0])