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- Fix possible global buffer memory leak when unloading EROFS module;
 
  - Fix FS_IOC_GETFSUUID ioctl by using super_set_uuid();
 
  - Reset m_llen to 0 so then it can retry if metadata is invalid.
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Merge tag 'erofs-for-6.10-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs fixes from Gao Xiang:
 "The most important one fixes possible infinite loops reported by a
  smartphone vendor OPPO recently due to some unexpected zero-sized
  compressed pcluster out of interrupted I/Os, storage failures, etc.

  Another patch fixes global buffer memory leak on unloading, and the
  remaining one switches to use super_set_uuid() to keep with the other
  filesystems.

  Summary:

   - Fix possible global buffer memory leak when unloading EROFS module

   - Fix FS_IOC_GETFSUUID ioctl by using super_set_uuid()

   - Reset m_llen to 0 so then it can retry if metadata is invalid"

* tag 'erofs-for-6.10-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: ensure m_llen is reset to 0 if metadata is invalid
  erofs: convert to use super_set_uuid to support for FS_IOC_GETFSUUID
  erofs: fix possible memory leak in z_erofs_gbuf_exit()
This commit is contained in:
Linus Torvalds 2024-07-02 11:59:34 -07:00
commit 734610514c
3 changed files with 7 additions and 5 deletions
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2
fs/erofs/super.c
View File

@ -343,7 +343,7 @@ static int erofs_read_superblock(struct super_block *sb)
sbi->build_time = le64_to_cpu(dsb->build_time);
sbi->build_time_nsec = le32_to_cpu(dsb->build_time_nsec);
memcpy(&sb->s_uuid, dsb->uuid, sizeof(dsb->uuid));
super_set_uuid(sb, (void *)dsb->uuid, sizeof(dsb->uuid));
ret = strscpy(sbi->volume_name, dsb->volume_name,
sizeof(dsb->volume_name));

2
fs/erofs/zmap.c
View File

@ -711,6 +711,8 @@ int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
err = z_erofs_do_map_blocks(inode, map, flags);
out:
if (err)
map->m_llen = 0;
trace_z_erofs_map_blocks_iter_exit(inode, map, flags, err);
return err;
}

8
fs/erofs/zutil.c
View File

@ -148,7 +148,7 @@ int __init z_erofs_gbuf_init(void)
void z_erofs_gbuf_exit(void)
{
int i;
int i, j;
for (i = 0; i < z_erofs_gbuf_count + (!!z_erofs_rsvbuf); ++i) {
struct z_erofs_gbuf *gbuf = &z_erofs_gbufpool[i];
@ -161,9 +161,9 @@ void z_erofs_gbuf_exit(void)
if (!gbuf->pages)
continue;
for (i = 0; i < gbuf->nrpages; ++i)
if (gbuf->pages[i])
put_page(gbuf->pages[i]);
for (j = 0; j < gbuf->nrpages; ++j)
if (gbuf->pages[j])
put_page(gbuf->pages[j]);
kfree(gbuf->pages);
gbuf->pages = NULL;
}