Keith Packard
41da295eb5
Trap SIGBUS to handle truncated shared memory segments
...
If a client passes a section of memory via file descriptor and then
subsequently truncates that file, the underlying pages will be freed
and the addresses invalidated. Subsequent accesses to the page will
fail with a SIGBUS error.
Trap that SIGBUS, figure out which segment was causing the error and
then allocate new pages to fill in for that region. Mark the offending
shared segment as invalid and free the resource ID so that the client
will be able to tell when subsequently attempting to use the segment.
Signed-off-by: Keith Packard <keithp@keithp.com>
v2: Use MAP_FIXED to simplify the recovery logic (Mark Kettenis)
v3: Also catch errors in ShmCreateSegment
Conflicts:
include/dix-config.h.in
include/xorg-config.h.in
2013-11-11 15:16:07 -08:00
..
.gitignore
dix and os: gitignore dix.O and os.O
2011-09-23 17:14:47 -07:00
access.c
os: move <arpa/inet.h> for any !win32 system
2013-10-05 15:26:55 +02:00
auth.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
backtrace.c
os: use a constant for backtrace array size
2013-11-01 09:39:53 +10:00
busfault.c
Trap SIGBUS to handle truncated shared memory segments
2013-11-11 15:16:07 -08:00
client.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
connection.c
Clean up a couple of warnings in os/
2013-10-31 16:58:12 -07:00
io.c
Add support for MIT-SHM AttachFd request
2013-10-31 16:58:28 -07:00
log.c
os: Remove any old logfile before trying to write to it
2013-07-11 07:39:03 +10:00
Makefile.am
Trap SIGBUS to handle truncated shared memory segments
2013-11-11 15:16:07 -08:00
mitauth.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
oscolor.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
osdep.h
os: Hide the Connection{In,Out}put implementation details
2012-09-20 14:40:18 -04:00
osinit.c
Trap SIGBUS to handle truncated shared memory segments
2013-11-11 15:16:07 -08:00
rpcauth.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
strcasecmp.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
strcasestr.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
strlcat.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
strlcpy.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
strndup.c
os: Ensure <dix-config.h> is included in strndup.c
2013-02-14 09:20:46 -08:00
utils.c
os: Actually use the computed clockid in GetTimeInMicros
2013-11-05 08:06:09 -08:00
WaitFor.c
Trap SIGBUS to handle truncated shared memory segments
2013-11-11 15:16:07 -08:00
xdmauth.c
Introduce a consistent coding style
2012-03-21 13:54:42 -07:00
xdmcp.c
dix: provide accessor methods for the last device event time
2013-10-18 16:44:32 +10:00
xprintf.c
os/xprintf: add Xvscnprintf and Xscnprintf
2012-05-03 14:59:23 +10:00
xsha1.c
os: Add libnettle as a choice of SHA1 implementation
2012-11-05 13:34:18 -06:00
xstrans.c
Clean up a couple of warnings in os/
2013-10-31 16:58:12 -07:00