The function dm_blk_report_zones tests if the device is suspended with the "dm_suspended_md" call. However, this function is called without holding any locks, so the device may be suspended just after it.
Move the call to dm_suspended_md after dm_get_live_table, so that the device can't be suspended after the suspended state was tested. Signed-off-by: Mikulas Patocka <[email protected]> Fixes: 37f53a2c60d0 ("dm: fix dm_blk_report_zones") --- drivers/md/dm-zone.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) Index: linux-2.6/drivers/md/dm-zone.c =================================================================== --- linux-2.6.orig/drivers/md/dm-zone.c 2026-01-06 15:55:41.000000000 +0100 +++ linux-2.6/drivers/md/dm-zone.c 2026-01-06 22:55:36.000000000 +0100 @@ -60,11 +60,13 @@ int dm_blk_report_zones(struct gendisk * * Zone revalidation during __bind() is in progress, but this * call is from a different process */ - if (dm_suspended_md(md)) - return -EAGAIN; - map = dm_get_live_table(md, &srcu_idx); put_table = true; + + if (dm_suspended_md(md)) { + ret = -EAGAIN; + goto do_put_table; + } } else { /* Zone revalidation during __bind() */ map = zone_revalidate_map; @@ -79,6 +81,7 @@ int dm_blk_report_zones(struct gendisk * ret = dm_blk_do_report_zones(md, map, nr_zones, &dm_args); } +do_put_table: if (put_table) dm_put_live_table(md, srcu_idx);
