diff options
author | Al Viro <viro@ZenIV.linux.org.uk> | 2008-01-02 09:09:57 -0500 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-02 16:13:27 -0500 |
commit | 831830b5a2b5d413407adf380ef62fe17d6fcbf2 (patch) | |
tree | b08f54f15374b5b98b0b3bea20a1d2ea8d1f50e0 /fs/hfs/string.c | |
parent | ac40532ef0b8649e6f7f83859ea0de1c4ed08a19 (diff) |
restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid
Contents of /proc/*/maps is sensitive and may become sensitive after
open() (e.g. if target originally shares our ->mm and later does exec
on suid-root binary).
Check at read() (actually, ->start() of iterator) time that mm_struct
we'd grabbed and locked is
- still the ->mm of target
- equal to reader's ->mm or the target is ptracable by reader.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hfs/string.c')
0 files changed, 0 insertions, 0 deletions