| commit | 2e0ad552f5f8cd0fda02bc45fcd2b89821c62fd1 | |
| author | Alexey Dobriyan <adobriyan@gmail.com> | |
| Fri, 20 Apr 2018 21:56:03 +0000 (20 14:56 -0700) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Sat, 21 Apr 2018 00:18:35 +0000 (20 17:18 -0700) | ||
| tree | 1b22f2e03dc3d0e82048a454b3daeb5e54efd11b | treesnapshot (tar.gz zip) |
| parent | 1e6306652ba18723015d1b4967fe9de55f042499 | commitdiff |
proc: revalidate kernel thread inodes to root:root
task_dump_owner() has the following code:
mm = task->mm;
if (mm) {
if (get_dumpable(mm) != SUID_DUMP_USER) {
uid = ...
}
}
Check for ->mm is buggy -- kernel thread might be borrowing mm
and inode will go to some random uid:gid pair.
Link: http://lkml.kernel.org/r/20180412220109.GA20978@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
task_dump_owner() has the following code:
mm = task->mm;
if (mm) {
if (get_dumpable(mm) != SUID_DUMP_USER) {
uid = ...
}
}
Check for ->mm is buggy -- kernel thread might be borrowing mm
and inode will go to some random uid:gid pair.
Link: http://lkml.kernel.org/r/20180412220109.GA20978@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| fs/proc/base.c | diffblobblamehistory |