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for-6.11-rc5-tag

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Merge tag 'for-6.11-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - fix use-after-free when submitting bios for read, after an error and
   partially submitted bio the original one is freed while it can be
   still be accessed again

 - fix fstests case btrfs/301, with enabled quotas wait for delayed
   iputs when flushing delalloc

 - fix periodic block group reclaim, an unitialized value can be
   returned if there are no block groups to reclaim

 - fix build warning (-Wmaybe-uninitialized)

* tag 'for-6.11-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix uninitialized return value from btrfs_reclaim_sweep()
  btrfs: fix a use-after-free when hitting errors inside btrfs_submit_chunk()
  btrfs: initialize last_extent_end to fix -Wmaybe-uninitialized warning in extent_fiemap()
  btrfs: run delayed iputs when flushing delalloc
This commit is contained in:
Linus Torvalds 2024-08-29 06:17:46 +12:00
commit 2840526875
5 changed files with 27 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
fs/btrfs/bio.c
View File

@ -668,7 +668,6 @@ static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num)
{
struct btrfs_inode *inode = bbio->inode;
struct btrfs_fs_info *fs_info = bbio->fs_info;
struct btrfs_bio *orig_bbio = bbio;
struct bio *bio = &bbio->bio;
u64 logical = bio->bi_iter.bi_sector << SECTOR_SHIFT;
u64 length = bio->bi_iter.bi_size;
@ -706,7 +705,7 @@ static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num)
bbio->saved_iter = bio->bi_iter;
ret = btrfs_lookup_bio_sums(bbio);
if (ret)
goto fail_put_bio;
goto fail;
}
if (btrfs_op(bio) == BTRFS_MAP_WRITE) {
@ -740,13 +739,13 @@ static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num)
ret = btrfs_bio_csum(bbio);
if (ret)
goto fail_put_bio;
goto fail;
} else if (use_append ||
(btrfs_is_zoned(fs_info) && inode &&
inode->flags & BTRFS_INODE_NODATASUM)) {
ret = btrfs_alloc_dummy_sum(bbio);
if (ret)
goto fail_put_bio;
goto fail;
}
}
@ -754,12 +753,23 @@ static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num)
done:
return map_length == length;
fail_put_bio:
if (map_length < length)
btrfs_cleanup_bio(bbio);
fail:
btrfs_bio_counter_dec(fs_info);
btrfs_bio_end_io(orig_bbio, ret);
/*
* We have split the original bbio, now we have to end both the current
* @bbio and remaining one, as the remaining one will never be submitted.
*/
if (map_length < length) {
struct btrfs_bio *remaining = bbio->private;
ASSERT(bbio->bio.bi_pool == &btrfs_clone_bioset);
ASSERT(remaining);
remaining->bio.bi_status = ret;
btrfs_orig_bbio_end_io(remaining);
}
bbio->bio.bi_status = ret;
btrfs_orig_bbio_end_io(bbio);
/* Do not submit another chunk */
return true;
}

2
fs/btrfs/fiemap.c
View File

@ -637,7 +637,7 @@ static int extent_fiemap(struct btrfs_inode *inode,
struct btrfs_path *path;
struct fiemap_cache cache = { 0 };
struct btrfs_backref_share_check_ctx *backref_ctx;
u64 last_extent_end;
u64 last_extent_end = 0;
u64 prev_extent_end;
u64 range_start;
u64 range_end;

2
fs/btrfs/qgroup.c
View File

@ -4185,6 +4185,8 @@ static int try_flush_qgroup(struct btrfs_root *root)
return 0;
}
btrfs_run_delayed_iputs(root->fs_info);
btrfs_wait_on_delayed_iputs(root->fs_info);
ret = btrfs_start_delalloc_snapshot(root, true);
if (ret < 0)
goto out;

17
fs/btrfs/space-info.c
View File

@ -1985,8 +1985,8 @@ static bool is_reclaim_urgent(struct btrfs_space_info *space_info)
return unalloc < data_chunk_size;
}
static int do_reclaim_sweep(struct btrfs_fs_info *fs_info,
struct btrfs_space_info *space_info, int raid)
static void do_reclaim_sweep(struct btrfs_fs_info *fs_info,
struct btrfs_space_info *space_info, int raid)
{
struct btrfs_block_group *bg;
int thresh_pct;
@ -2031,7 +2031,6 @@ again:
}
up_read(&space_info->groups_sem);
return 0;
}
void btrfs_space_info_update_reclaimable(struct btrfs_space_info *space_info, s64 bytes)
@ -2074,21 +2073,15 @@ bool btrfs_should_periodic_reclaim(struct btrfs_space_info *space_info)
return ret;
}
int btrfs_reclaim_sweep(struct btrfs_fs_info *fs_info)
void btrfs_reclaim_sweep(struct btrfs_fs_info *fs_info)
{
int ret;
int raid;
struct btrfs_space_info *space_info;
list_for_each_entry(space_info, &fs_info->space_info, list) {
if (!btrfs_should_periodic_reclaim(space_info))
continue;
for (raid = 0; raid < BTRFS_NR_RAID_TYPES; raid++) {
ret = do_reclaim_sweep(fs_info, space_info, raid);
if (ret)
return ret;
}
for (raid = 0; raid < BTRFS_NR_RAID_TYPES; raid++)
do_reclaim_sweep(fs_info, space_info, raid);
}
return ret;
}

2
fs/btrfs/space-info.h
View File

@ -294,6 +294,6 @@ void btrfs_space_info_update_reclaimable(struct btrfs_space_info *space_info, s6
void btrfs_set_periodic_reclaim_ready(struct btrfs_space_info *space_info, bool ready);
bool btrfs_should_periodic_reclaim(struct btrfs_space_info *space_info);
int btrfs_calc_reclaim_threshold(struct btrfs_space_info *space_info);
int btrfs_reclaim_sweep(struct btrfs_fs_info *fs_info);
void btrfs_reclaim_sweep(struct btrfs_fs_info *fs_info);
#endif /* BTRFS_SPACE_INFO_H */