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ext4: convert from atomic_t to refcount_t on ext4_io_end->count
authorXiyu Yang <xiyuyang19@fudan.edu.cn>
Mon, 19 Jul 2021 05:59:14 +0000 (13:59 +0800)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 4 Nov 2021 14:33:24 +0000 (10:33 -0400)
commit6df74e01917d92d9c1d84fa2069ca4b0a10f25e4
tree15aedfa14e985faefebd636c0869a63c08c9473etree | snapshot
parentce2292b808a5593c9e928ede909ef4017e58fe5bcommit | diff
ext4: convert from atomic_t to refcount_t on ext4_io_end->count

refcount_t type and corresponding API can protect refcounters from
accidental underflow and overflow and further use-after-free situations.

Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/1626674355-55795-1-git-send-email-xiyuyang19@fudan.edu.cn
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/ext4/ext4.h diff | blob | history
fs/ext4/page-io.c diff | blob | history
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