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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:14:23 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:14:23 +0000 |
| commit | dcfb98cf8931dc6bce38eff8e1c82972e1adf484 (patch) | |
| tree | 5395e7ca0effa58c164a86740b6470cbb47fe05e /fs/super.c | |
| parent | Adding upstream version 6.9.8. (diff) | |
| download | linux-dcfb98cf8931dc6bce38eff8e1c82972e1adf484.tar.xz linux-dcfb98cf8931dc6bce38eff8e1c82972e1adf484.zip | |
Adding upstream version 6.9.9.upstream/6.9.9
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/super.c b/fs/super.c index 69ce6c6009..4e52aba2fb 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1501,8 +1501,17 @@ static int fs_bdev_thaw(struct block_device *bdev) lockdep_assert_held(&bdev->bd_fsfreeze_mutex); + /* + * The block device may have been frozen before it was claimed by a + * filesystem. Concurrently another process might try to mount that + * frozen block device and has temporarily claimed the block device for + * that purpose causing a concurrent fs_bdev_thaw() to end up here. The + * mounter is already about to abort mounting because they still saw an + * elevanted bdev->bd_fsfreeze_count so get_bdev_super() will return + * NULL in that case. + */ sb = get_bdev_super(bdev); - if (WARN_ON_ONCE(!sb)) + if (!sb) return -EINVAL; if (sb->s_op->thaw_super) |