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(parent: a535116) | patch
ovl: fix NULL pointer defer when encoding non-decodable lower fid
authorAmir Goldstein <amir73il@gmail.com>
Tue, 3 Oct 2023 06:21:27 +0000 (09:21 +0300)
committerAmir Goldstein <amir73il@gmail.com>
Tue, 3 Oct 2023 06:24:11 +0000 (09:24 +0300)
commitc7242a45cb8cad5b6cd840fd4661315b45b1e841
tree173fad06099094e5f53a9872c5416c1d534a9581tree | snapshot
parenta535116d80339dbfe50b9b81b2f808c69eefbbc3commit | diff
ovl: fix NULL pointer defer when encoding non-decodable lower fid

A wrong return value from ovl_check_encode_origin() would cause
ovl_dentry_to_fid() to try to encode fid from NULL upper dentry.

Reported-by: syzbot+2208f82282740c1c8915@syzkaller.appspotmail.com
Fixes: 16aac5ad1fa9 ("ovl: support encoding non-decodable file handles")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
fs/overlayfs/export.c diff | blob | history
Domain: System / Kernel;