diff options
| author | Richard Weinberger <richard@nod.at> | 2013-08-17 18:46:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-26 17:21:58 -0700 |
| commit | 1e354b6b4b0cb05d1666c0f8c3a13a164aec70c3 (patch) | |
| tree | 1dffaa1ee156b55039083afdb722c45e1f3a7cb5 /lib/digsig.c | |
| parent | 61bc17595c5a036931473347856ae5a44f9b01ab (diff) | |
um: Implement probe_kernel_read()
commit f75b1b1bedfb498cc43a992ce4d7ed8df3b1e770 upstream.
UML needs it's own probe_kernel_read() to handle kernel
mode faults correctly.
The implementation uses mincore() on the host side to detect
whether a page is owned by the UML kernel process.
This fixes also a possible crash when sysrq-t is used.
Starting with 3.10 sysrq-t calls probe_kernel_read() to
read details from the kernel workers. As kernel worker are
completely async pointers may turn NULL while reading them.
Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: <stian@nixia.no>
Cc: <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/digsig.c')
0 files changed, 0 insertions, 0 deletions