linux

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Lars Ellenberg 1d53f09e17 drbd: fix potential kernel BUG (NULL deref)

BUG trace would look like:
 lc_find
 drbd_rs_complete_io
 got_OVResult
 drbd_asender

Could be triggered by explicit, or IO-error policy based,
detach during online-verify.

We may only dereference mdev->resync, if we first get_ldev(), as the
disk may break any time, causing mdev->resync to disappear once all
ldev references have been returned.
Already in flight online-verify requests or replies may still come in,
which we then need to ignore.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

2010-10-14 18:38:34 +02:00

drbd_actlog.c

drbd: reduce code duplication when receiving data requests

2010-10-14 18:38:19 +02:00

drbd_bitmap.c

drbd: Disable activity log updates when the whole device is out of sync

2010-10-14 18:38:26 +02:00

drbd_int.h

drbd: don't count sendpage()d pages only referenced by tcp as in use

2010-10-14 18:38:33 +02:00

drbd_main.c

drbd: don't count sendpage()d pages only referenced by tcp as in use