From: Sven Schnelle Date: Tue, 3 Sep 2024 10:23:12 +0000 (+0200) Subject: uprobes: Use kzalloc to allocate xol area X-Git-Tag: v6.6.51~47 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9faed52b98e11fb2638b6d252f1a0d7fd7de691f;p=thirdparty%2Fkernel%2Fstable.git uprobes: Use kzalloc to allocate xol area 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 Signed-off-by: Peter Zijlstra (Intel) Acked-by: Oleg Nesterov Link: https://lore.kernel.org/r/20240903102313.3402529-1-svens@linux.ibm.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 3048589e2e851..4705571f80345 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -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])