Revision 77788775c7132a8d93c6930ab1bd84fc743c7cb7 authored by Jens Axboe on 29 December 2020, 17:50:46 UTC, committed by Jens Axboe on 29 December 2020, 18:00:36 UTC
If we COW the identity, we assume that ->mm never changes. But this
isn't true of multiple processes end up sharing the ring. Hence treat
id->mm like like any other process compontent when it comes to the
identity mapping. This is pretty trivial, just moving the existing grab
into io_grab_identity(), and including a check for the match.
Cc: stable@vger.kernel.org # 5.10
Fixes: 1e6fa5216a0e ("io_uring: COW io_identity on mismatch")
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>:
Tested-by: Christian Brauner <christian.brauner@ubuntu.com>:
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 5c8fe58
| File | Mode | Size |
|---|---|---|
| apparmor | ||
| bpf | ||
| integrity | ||
| keys | ||
| loadpin | ||
| lockdown | ||
| safesetid | ||
| selinux | ||
| smack | ||
| tomoyo | ||
| yama | ||
| Kconfig | -rw-r--r-- | 10.7 KB |
| Kconfig.hardening | -rw-r--r-- | 8.8 KB |
| Makefile | -rw-r--r-- | 1.3 KB |
| commoncap.c | -rw-r--r-- | 39.0 KB |
| device_cgroup.c | -rw-r--r-- | 21.1 KB |
| inode.c | -rw-r--r-- | 10.6 KB |
| lsm_audit.c | -rw-r--r-- | 10.7 KB |
| min_addr.c | -rw-r--r-- | 1.3 KB |
| security.c | -rw-r--r-- | 63.9 KB |
Computing file changes ...
