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uprobes: Use kzalloc to allocate xol area 

commit e240b0fde52f33670d1336697c22d90a4fe33c84 upstream.

To prevent unitialized members, use kzalloc to allocate
the xol area.

Fixes: b059a453b1 ("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>
This commit is contained in:
Sven Schnelle 2024-09-03 12:23:12 +02:00 committed by Greg Kroah-Hartman
parent 7eeb7189c4
commit 9faed52b98
1 changed files with 1 additions and 2 deletions
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3
kernel/events/uprobes.c
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@ -1480,7 +1480,7 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
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;
@ -1490,7 +1490,6 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
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])