jfs: validate dmap parameters in dbMount() and slot chains in jfs_dtree.c - #2625
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…ee.c Fix two filesystem corruption crashes in fs/jfs/: 1. In dbMount() (fs/jfs/jfs_dmap.c), validate db_mapsize > 0, db_numag <= MAXAG, db_agheight <= MAX_AGHEIGHT, and db_agwidth > 0 to prevent out-of-bounds array indexing on bmp->db_agfree[] and shift UB. 2. In check_dtroot(), check_dtpage(), and jfs_readdir() (fs/jfs/jfs_dtree.c), validate directory slot continuation indices to prevent cyclic or out-of-bounds slot walks. Fixes: 1da177e ("Linux-2.6.12-rc2") Assisted-by: LLM Signed-off-by: Hui Peng <benquike@gmail.com>
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Series: https://patchwork.kernel.org/project/linux-fsdevel/list/?series=1169471
Submitter: Hui Peng
Version: 1
Patches: 1/1
Message-ID:
<20260919222602.3794171-1-benquike@gmail.com>Base: vfs.base.ci
Lore: https://lore.kernel.org/linux-fsdevel/20260919222602.3794171-1-benquike@gmail.com
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