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(parent: 63c3119) | patch
jbd2: fix potential use-after-free in jbd2_fc_wait_bufs
authorYe Bin <yebin10@huawei.com>
Wed, 14 Sep 2022 10:08:12 +0000 (18:08 +0800)
committerTheodore Ts'o <tytso@mit.edu>
Sat, 1 Oct 2022 03:46:52 +0000 (23:46 -0400)
commitc1353af279b9cce2ec1992d2522b056b86f00368
tree03104b6889bdf97ca76bd508ab80c03f1838d4aftree | snapshot
parent63c311995d1f90334f0390d98dd7e8de2d4dad91commit | diff
jbd2: fix potential use-after-free in jbd2_fc_wait_bufs

In 'jbd2_fc_wait_bufs' use 'bh' after put buffer head reference count
which may lead to use-after-free.
So judge buffer if uptodate before put buffer head reference count.

Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220914100812.1414768-3-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/jbd2/journal.c diff | blob | history
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