5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sven Schnelle <svens@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240903102313.3402529-1-svens@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/events/uprobes.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1491,7 +1491,7 @@ 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;
@@ -1501,7 +1501,6 @@ 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])
