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| author | Jan Kara <jack@suse.cz> | 2019-03-12 12:42:37 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-03-19 09:29:07 +0100 |
| commit | b2d22b6bb33aac10c415e4ba13c8eade201c6f09 (patch) | |
| tree | 1610454690dd14fe250d0b6e8b6be1f580f1f360 /fs/btrfs/ioctl.c | |
| parent | 62c9d2674b31d4c8a674bee86b7edc6da2803aea (diff) | |
| download | linux-b2d22b6bb33aac10c415e4ba13c8eade201c6f09.tar.bz2 | |
fanotify: Allow copying of file handle to userspace
When file handle is embedded inside fanotify_event and usercopy checks
are enabled, we get a warning like:
Bad or missing usercopy whitelist? Kernel memory exposure attempt detected
from SLAB object 'fanotify_event' (offset 40, size 8)!
WARNING: CPU: 1 PID: 7649 at mm/usercopy.c:78 usercopy_warn+0xeb/0x110
mm/usercopy.c:78
Annotate handling in fanotify_event properly to mark copying it to
userspace is fine.
Reported-by: syzbot+2c49971e251e36216d1f@syzkaller.appspotmail.com
Fixes: a8b13aa20afb ("fanotify: enable FAN_REPORT_FID init flag")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/btrfs/ioctl.c')
0 files changed, 0 insertions, 0 deletions