jfs: fix uaf in jfs_evict_inode

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[ Upstream commit e0e1958f4c ]

When the execution of diMount(ipimap) fails, the object ipimap that has been
released may be accessed in diFreeSpecial(). Asynchronous ipimap release occurs
when rcu_core() calls jfs_free_node().

Therefore, when diMount(ipimap) fails, sbi->ipimap should not be initialized as
ipimap.

Reported-and-tested-by: syzbot+01cf2dbcbe2022454388@syzkaller.appspotmail.com
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Edward Adam Davis 2023-10-31 13:39:04 +08:00 • committed by Greg Kroah-Hartman

parent 70780914cb

commit 32e8f2d955

1 changed files with 3 additions and 3 deletions

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fs/jfs/jfs_mount.c

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