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bcachefs: bch2_ioctl_subvolume_destroy() fixes

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[ Upstream commit 707549600c ]

bch2_evict_subvolume_inodes() was getting stuck - due to incorrectly
pruning the dcache.

Also, fix missing permissions checks.

Reported-by: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kent Overstreet 2025-03-29 19:01:09 -04:00 committed by Greg Kroah-Hartman
parent a964484a35
commit 9e6e83e1e2
1 changed files with 4 additions and 2 deletions
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6
fs/bcachefs/fs-ioctl.c
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@ -520,10 +520,12 @@ static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
ret = -ENOENT;
goto err;
}
ret = __bch2_unlink(dir, victim, true);
ret = inode_permission(file_mnt_idmap(filp), d_inode(victim), MAY_WRITE) ?:
__bch2_unlink(dir, victim, true);
if (!ret) {
fsnotify_rmdir(dir, victim);
d_delete(victim);
d_invalidate(victim);
}
err:
inode_unlock(dir);