diff options
author | Christoph Hellwig <hch@lst.de> | 2023-05-31 14:55:31 +0200 |
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committer | Jens Axboe <axboe@kernel.dk> | 2023-06-05 10:57:40 -0600 |
commit | 7a126d5bf975f082281fb9b45d110cd49b7c3ee4 (patch) | |
tree | 8ff667acac93c438bd9184de4b3e575a3ad1ec00 /kernel/power | |
parent | d4a28d7defe79006e59293a4b43d518ba8483fb0 (diff) |
dm: only call early_lookup_bdev from early boot context
early_lookup_bdev is supposed to only be called from the early boot
code, but dm_get_device calls it as a general fallback when lookup_bdev
fails, which is problematic because early_lookup_bdev bypasses all normal
path based permission checking, and might cause problems with certain
container environments renaming devices.
Switch to only call early_lookup_bdev when dm is built-in and the system
state in not running yet. This means it is still available when tables
are constructed by dm-init.c from the kernel command line, but not
otherwise.
Note that this strictly speaking changes the kernel ABI as the PARTUUID=
and PARTLABEL= style syntax is now not available during a running
systems. They never were intended for that, but this breaks things
we'll have to figure out a way to make them available again. But if
avoidable in any way I'd rather avoid that.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20230531125535.676098-21-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel/power')
0 files changed, 0 insertions, 0 deletions