Commit c1362d86 authored by Sven Schnelle's avatar Sven Schnelle Committed by Wen Zhiwei
Browse files

uprobes: Use kzalloc to allocate xol area 

stable inclusion
from stable-v6.6.51
commit 9faed52b98e11fb2638b6d252f1a0d7fd7de691f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IAYRVR

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9faed52b98e11fb2638b6d252f1a0d7fd7de691f



--------------------------------

commit e240b0fde52f33670d1336697c22d90a4fe33c84 upstream.

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

Fixes: b059a453 ("x86/vdso: Add mremap hook to vm_special_mapping")
Signed-off-by: default avatarSven Schnelle <svens@linux.ibm.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: default avatarOleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20240903102313.3402529-1-svens@linux.ibm.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarWen Zhiwei <wenzhiwei@kylinos.cn>
parent 3c1ff241

kernel/events/uprobes.c

+1 −2
Original line number Diff line number Diff line
@@ -1482,7 +1482,7 @@ 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;
@@ -1492,7 +1492,6 @@ 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])