selinux: fix BPF token permission checks

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Avoid multiple lookups of the bpffs creator SID using the token's file
descriptor when the same information can be found via the resolved
path/dentry (in selinux_bpf_token_create()) or the token itself (in
selinux_bpf_map_create() and selinux_bpf_prog_load()).  Not only does
this simplify the code, it avoids potential TOCTOU issues if the user
changes the token file descriptor passed into the kernel.

Cc: stable@vger.kernel.org
Fixes: 5473a722f7 ("selinux: add support for BPF token access control")
Reviewed-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Tested-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

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Paul Moore 2026-08-14 16:35:18 -04:00

parent cee9395acd

commit 77d499e61d

1 changed files with 10 additions and 26 deletions

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36

security/selinux/hooks.c

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