mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 21:33:52 +00:00
1f13dff09f
The decompressors may be called while in an atomic section. So move the kmalloc() out of this path, and into the "page actor" init function. This fixes a regression introduced by commitf268eedddf("squashfs: extend "page actor" to handle missing pages") Link: https://lkml.kernel.org/r/20220822215430.15933-1-phillip@squashfs.org.uk Fixes:f268eedddf("squashfs: extend "page actor" to handle missing pages") Reported-by: Chris Murphy <lists@colorremedies.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef PAGE_ACTOR_H
|
|
#define PAGE_ACTOR_H
|
|
/*
|
|
* Copyright (c) 2013
|
|
* Phillip Lougher <phillip@squashfs.org.uk>
|
|
*/
|
|
|
|
struct squashfs_page_actor {
|
|
union {
|
|
void **buffer;
|
|
struct page **page;
|
|
};
|
|
void *pageaddr;
|
|
void *tmp_buffer;
|
|
void *(*squashfs_first_page)(struct squashfs_page_actor *);
|
|
void *(*squashfs_next_page)(struct squashfs_page_actor *);
|
|
void (*squashfs_finish_page)(struct squashfs_page_actor *);
|
|
int pages;
|
|
int length;
|
|
int next_page;
|
|
int alloc_buffer;
|
|
int returned_pages;
|
|
pgoff_t next_index;
|
|
};
|
|
|
|
extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
|
|
int pages, int length);
|
|
extern struct squashfs_page_actor *squashfs_page_actor_init_special(
|
|
struct squashfs_sb_info *msblk,
|
|
struct page **page, int pages, int length);
|
|
static inline void squashfs_page_actor_free(struct squashfs_page_actor *actor)
|
|
{
|
|
kfree(actor->tmp_buffer);
|
|
kfree(actor);
|
|
}
|
|
static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
|
|
{
|
|
return actor->squashfs_first_page(actor);
|
|
}
|
|
static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
|
|
{
|
|
return actor->squashfs_next_page(actor);
|
|
}
|
|
static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
|
|
{
|
|
actor->squashfs_finish_page(actor);
|
|
}
|
|
static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor)
|
|
{
|
|
actor->alloc_buffer = 0;
|
|
}
|
|
#endif
|