github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-30 10:04:04 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

block: fix EOD return for device with nr_sectors == 0

Browse Source 
A recent commit skipped dumping the usual "attempt to access beyond end
of device" message if the device size is 0 sectors, as that's a common
pattern for devices that have been hot removed. But while it stopped
that message, it also prevented returning -EIO for that condition.
Reinstate the -EIO return, while retaining the quiet operation for
triggering EOD for a device with 0 sectors.

Reported-by: syzbot+4b12286339fe4c2700c1@syzkaller.appspotmail.com
Reported-by: Sahil Chandna <chandna.linuxkernel@gmail.com>
Fixes: d0a2b527d8 ("block: tone down bio_check_eod")
Tested-by: Sahil Chandna <chandna.linuxkernel@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2025-09-22 05:55:41 -06:00
parent 027a7a9c07
commit ab073abf6d
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/blk-core.c
View File

@ -557,9 +557,11 @@ static inline int bio_check_eod(struct bio *bio)
sector_t maxsector = bdev_nr_sectors(bio->bi_bdev);
unsigned int nr_sectors = bio_sectors(bio);
if (nr_sectors && maxsector &&
if (nr_sectors &&
(nr_sectors > maxsector ||
bio->bi_iter.bi_sector > maxsector - nr_sectors)) {
if (!maxsector)
return -EIO;
pr_info_ratelimited("%s: attempt to access beyond end of device\n"
"%pg: rw=%d, sector=%llu, nr_sectors = %u limit=%llu\n",
current->comm, bio->bi_bdev, bio->bi_opf,