diff options
| author |   Christoph Hellwig <hch@lst.de> | 2021-08-16 15:46:24 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-08-23 12:54:31 -0600 |
| commit | d152c682f03ceb65c0d9663d4ba6ee2d46aa784d (patch) | |
| tree | 31cc1a85256072b4d65d881472c2f6ace7c10178 /include/trace | |
| parent | block: hold a request_queue reference for the lifetime of struct gendisk (diff) | |
| download | linux-dev-d152c682f03ceb65c0d9663d4ba6ee2d46aa784d.tar.xz linux-dev-d152c682f03ceb65c0d9663d4ba6ee2d46aa784d.zip | |
block: add an explicit ->disk backpointer to the request_queue
Replace the magic lookup through the kobject tree with an explicit
backpointer, given that the device model links are set up and torn
down at times when I/O is still possible, leading to potential
NULL or invalid pointer dereferences.
Fixes: edb0872f44ec ("block: move the bdi from the request_queue to the gendisk")
Reported-by: syzbot <syzbot+aa0801b6b32dca9dda82@syzkaller.appspotmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20210816134624.GA24234@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/kyber.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/trace/events/kyber.h b/include/trace/events/kyber.h index f9802562edf6..491098a0d8ed 100644 --- a/include/trace/events/kyber.h +++ b/include/trace/events/kyber.h @@ -30,7 +30,7 @@ TRACE_EVENT(kyber_latency, ), TP_fast_assign( - __entry->dev = disk_devt(queue_to_disk(q)); + __entry->dev = disk_devt(q->disk); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); strlcpy(__entry->type, type, sizeof(__entry->type)); __entry->percentile = percentile; @@ -59,7 +59,7 @@ TRACE_EVENT(kyber_adjust, ), TP_fast_assign( - __entry->dev = disk_devt(queue_to_disk(q)); + __entry->dev = disk_devt(q->disk); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); __entry->depth = depth; ), @@ -81,7 +81,7 @@ TRACE_EVENT(kyber_throttled, ), TP_fast_assign( - __entry->dev = disk_devt(queue_to_disk(q)); + __entry->dev = disk_devt(q->disk); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); ), |