https://github.com/torvalds/linux
Revision 3eb96946f0be6bf447cbdf219aba22bc42672f92 authored by Christoph Hellwig on 24 May 2023, 06:05:38 UTC, committed by Jens Axboe on 24 May 2023, 14:19:26 UTC
Since the dawn of time bio_check_eod has a check for a non-zero size of
the device.  This doesn't really make any sense as we never want to send
I/O to a device that's been set to zero size, or never moved out of that.

I am a bit surprised we haven't caught this for a long time, but the
removal of the extra validation inside of zram caused syzbot to trip
over this issue recently.  I've added a Fixes tag for that commit, but
the issue really goes back way before git history.

Fixes: 9fe95babc742 ("zram: remove valid_io_request")
Reported-by: syzbot+b8d61a58b7c7ebd2c8e0@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230524060538.1593686-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 46930b7
History
Tip revision: 3eb96946f0be6bf447cbdf219aba22bc42672f92 authored by Christoph Hellwig on 24 May 2023, 06:05:38 UTC
block: make bio_check_eod work for zero sized devices
Tip revision: 3eb9694
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