bcachefs: Fix refcounting in discard path

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bch_dev->io_ref does not protect against the filesystem going away;
bch_fs->writes does.

Thus the filesystem write ref needs to be the last ref we release.

Reported-by: syzbot+9e0404b505e604f67e41@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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This commit is contained in:

Kent Overstreet 2024-08-21 23:21:52 -04:00

parent 8ed823b192

commit 0b50b7313e

1 changed files with 6 additions and 6 deletions

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12

fs/bcachefs/alloc_background.c

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