Srikar Dronamraju
cbc91f71b5
uprobes/core: Decrement uprobe count before the pages are unmapped ...
Uprobes has a callback (uprobe_munmap()) in the unmap path to
maintain the uprobes count.
In the exit path this callback gets called in unlink_file_vma().
However by the time unlink_file_vma() is called, the pages would
have been unmapped (in unmap_vmas()) and the task->rss_stat counts
accounted (in zap_pte_range()).
If the exiting process has probepoints, uprobe_munmap() checks if
the breakpoint instruction was around before decrementing the probe
count.
This results in a file backed page being reread by uprobe_munmap()
and hence it does not find the breakpoint.
This patch fixes this problem by moving the callback to
unmap_single_vma(). Since unmap_single_vma() may not unmap the
complete vma, add start and end parameters to uprobe_munmap().
This bug became apparent courtesy of commit c3f0327f8e9d
("mm: add rss counters consistency check").
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Linux-mm <linux-mm@kvack.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120411103527.23245.9835.sendpatchset@srdronam.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-04-14 13:25:48 +02:00
2012-03-29 15:34:57 -07:00
2012-03-06 15:16:18 -05:00
2012-02-03 01:21:25 +01:00
2012-03-28 10:01:29 -07:00
2012-03-27 00:37:23 +01:00
2012-03-28 13:56:35 -07:00
2012-03-17 12:20:44 -07:00
2012-02-15 00:19:48 -05:00
2012-03-30 16:09:02 -07:00
2012-03-24 10:41:37 -07:00
2012-03-28 20:59:45 -07:00
2012-03-30 17:31:56 -07:00
2012-03-26 21:06:30 +02:00
2012-02-21 13:29:06 +01:00
2012-03-07 17:40:56 +01:00
2012-03-07 17:40:49 +01:00
2012-03-26 11:49:47 -04:00
2012-03-12 22:49:02 +01:00
2012-04-02 14:41:25 -07:00
2012-03-26 20:41:01 +04:00
2012-03-13 11:21:23 +11:00
2012-04-04 10:09:30 -07:00
2012-03-28 12:34:33 -07:00
2012-03-24 10:08:39 -07:00
2012-03-26 11:48:54 -04:00
2012-03-15 12:42:07 -07:00
2012-03-16 10:38:24 -04:00
2012-03-30 16:45:39 -07:00
2012-02-20 12:48:48 -08:00
2012-02-09 09:04:23 -08:00
2012-03-01 16:14:48 +01:00
2012-03-22 09:31:55 -04:00
2012-03-24 10:41:37 -07:00
2012-03-01 13:38:49 +01:00
2012-03-07 17:06:08 +11:00
2012-03-16 10:38:24 -04:00
2012-03-20 21:29:40 -04:00
2012-03-20 21:29:46 -04:00
2012-03-24 10:08:39 -07:00
2012-03-04 17:54:34 -05:00
2012-03-23 16:58:34 -07:00
2012-02-07 07:51:30 +01:00
2012-03-04 17:54:35 -05:00
2012-03-16 10:38:24 -04:00
2012-03-24 10:41:37 -07:00
2012-03-21 17:55:01 -07:00
2012-03-16 20:35:02 +00:00
2012-03-16 20:35:02 +00:00
2012-03-16 20:35:01 +00:00
2012-02-01 18:37:39 -08:00
2012-03-28 18:30:03 +01:00
2012-03-21 17:54:56 -07:00
2012-03-29 18:12:23 -07:00
2012-03-23 16:58:36 -07:00
2012-02-28 16:02:54 +01:00
2012-02-02 15:30:47 -08:00
2012-03-24 10:41:37 -07:00
2012-03-24 10:41:37 -07:00
2012-03-30 03:23:30 -04:00
2012-03-29 15:38:31 +10:30
2012-03-29 14:46:05 -07:00
2012-03-16 10:38:24 -04:00
2012-03-23 16:58:38 -07:00
2012-03-24 10:08:39 -07:00
2012-03-29 19:52:48 +08:00
2012-03-20 21:29:37 -04:00
2012-03-03 09:02:52 -07:00
2012-03-28 15:58:21 -07:00
2012-03-20 21:29:53 -04:00
2012-03-17 21:51:34 +01:00
2012-03-21 18:55:10 -07:00
2012-02-20 19:46:36 +11:00
2012-03-28 16:36:44 +02:00
2012-03-28 15:02:41 -07:00
2012-04-04 17:13:43 -07:00
2012-03-29 15:34:57 -07:00
2012-02-22 18:15:39 +05:30
2012-03-28 14:24:40 -07:00
2012-03-28 18:30:03 +01:00
2012-02-08 09:19:42 +01:00
2012-03-04 17:54:34 -05:00
2012-03-08 11:53:13 -08:00
2012-02-13 00:46:41 -05:00
2012-04-06 02:43:12 -04:00
2012-03-31 16:03:16 -04:00
2012-03-24 10:41:37 -07:00
2012-02-19 10:30:57 -08:00
2012-03-20 21:29:32 -04:00
2012-03-18 22:15:39 +01:00
2012-04-02 14:41:27 -07:00
2012-04-05 15:30:34 -07:00
2012-03-04 17:54:34 -05:00
2012-03-14 08:47:58 -04:00
2012-02-21 11:08:30 -05:00
2012-03-02 10:38:33 +01:00
2012-02-28 17:10:21 +00:00
2012-03-19 17:56:18 -07:00
2012-03-28 14:08:46 -07:00
2012-03-24 10:08:39 -07:00
2012-03-21 17:55:02 -07:00
2012-03-21 17:54:59 -07:00
2012-03-16 10:38:24 -04:00
2012-03-16 10:38:24 -04:00
2012-03-16 10:38:24 -04:00
2012-03-16 13:36:04 -07:00
2012-03-26 21:47:19 +02:00
2012-03-26 21:47:19 +02:00
2012-03-26 21:47:19 +02:00
2012-03-26 21:47:19 +02:00
2012-03-26 21:47:19 +02:00
2012-03-26 21:47:19 +02:00
2012-03-04 17:54:34 -05:00
2012-03-28 15:58:21 -07:00
2012-03-27 22:45:26 -04:00
2012-02-21 16:56:45 -05:00
2012-03-04 20:41:38 -05:00
2012-03-24 10:08:39 -07:00
2012-02-24 01:37:35 -08:00
2012-02-08 15:52:45 -05:00
2012-02-08 15:52:45 -05:00
2012-03-16 23:00:20 -07:00
2012-03-21 17:54:59 -07:00
2012-03-09 10:56:35 -08:00
2012-03-28 18:30:03 +01:00
2012-03-04 17:54:34 -05:00
2012-02-15 09:45:53 +01:00
2012-02-14 08:44:55 -08:00
2012-03-16 10:38:24 -04:00
2012-03-16 10:38:24 -04:00
2012-02-13 00:46:41 -05:00
2012-02-26 16:48:06 -07:00
2012-03-04 20:41:38 -05:00
2012-02-14 13:45:56 -02:00
2012-03-13 22:45:38 -04:00
2012-03-13 22:45:25 -04:00
2012-02-28 20:01:08 +01:00
2012-03-16 10:38:24 -04:00
2012-03-08 10:50:35 -08:00
2012-04-02 09:50:40 -07:00
2012-03-21 17:54:57 -07:00
2012-03-31 13:34:04 -07:00
2012-03-23 08:53:47 -07:00
2012-03-08 10:50:35 -08:00
2012-03-29 17:41:25 -05:00
2012-03-28 23:30:28 +02:00
2012-03-05 15:49:42 -08:00
2012-03-04 17:54:34 -05:00
2012-03-28 14:35:31 -07:00
2012-03-08 14:11:36 +02:00
2012-03-23 16:58:35 -07:00
2012-03-23 16:58:34 -07:00
2012-02-29 15:35:41 -06:00
2012-03-28 18:30:03 +01:00
2012-03-23 16:58:33 -07:00
2012-03-26 20:40:59 +04:00
2012-04-03 09:49:59 -07:00
2012-03-23 16:58:31 -07:00
2012-03-16 10:38:24 -04:00
2012-03-15 21:41:34 +01:00
2012-03-03 15:04:45 -05:00
2012-03-21 17:55:02 -07:00
2012-03-04 17:54:34 -05:00
2012-03-21 17:54:57 -07:00
2012-03-31 11:50:01 +02:00
2012-03-28 17:19:28 -07:00
2012-03-21 17:54:56 -07:00
2012-03-27 16:30:09 -07:00
2012-03-26 12:50:52 +10:30
2012-03-26 12:50:51 +10:30
2012-02-02 00:23:14 +11:00
2012-03-27 08:26:34 +01:00
2012-02-21 15:03:48 -05:00
2012-02-24 01:42:07 -08:00
2012-04-03 17:23:23 -04:00
2012-02-24 10:05:59 +01:00
2012-02-26 14:10:44 -05:00
2012-03-06 15:16:19 -05:00
2012-03-26 11:48:54 -04:00
2012-01-31 18:20:28 -05:00
2012-03-02 17:18:10 -05:00
2012-03-21 09:31:44 -04:00
2012-03-05 15:26:47 -05:00
2012-02-16 14:55:27 -05:00
2012-03-17 11:09:33 -04:00
2012-03-21 09:31:46 -04:00
2012-01-31 18:20:25 -05:00
2012-03-04 17:54:34 -05:00
2012-03-12 14:19:34 -04:00
2012-03-23 16:58:31 -07:00
2012-02-16 06:11:23 -07:00
2012-03-24 10:41:37 -07:00
2012-02-05 23:08:30 -07:00
2012-02-26 16:48:06 -07:00
2012-03-15 23:28:19 +08:00
2012-03-05 08:09:09 -07:00
2012-03-28 14:41:36 -07:00
2012-02-23 09:39:23 +02:00
2012-03-21 17:54:58 -07:00
2012-03-16 10:38:24 -04:00
2012-03-14 17:25:56 +08:00
2012-03-21 17:55:01 -07:00
2012-03-24 10:08:39 -07:00
2012-03-28 18:30:03 +01:00
2012-03-04 20:54:01 -05:00
2012-02-23 12:05:21 -08:00
2012-03-23 14:02:12 -07:00
2012-03-04 09:34:15 -08:00
2012-03-24 08:46:59 +01:00
2012-03-16 10:38:24 -04:00
2012-03-28 17:14:36 -07:00
2012-03-23 16:58:31 -07:00
2012-02-07 12:54:56 -05:00
2012-03-24 10:41:37 -07:00
2012-03-28 23:31:24 +02:00
2012-03-04 23:08:46 +01:00
2012-03-16 21:49:24 +01:00
2012-03-23 16:58:38 -07:00
2012-03-04 17:54:34 -05:00
2012-03-16 10:38:24 -04:00
2012-03-04 20:41:38 -05:00
2012-03-04 20:41:38 -05:00
2012-03-04 20:41:38 -05:00
2012-03-23 16:58:32 -07:00
2012-03-01 10:28:04 +01:00
2012-03-20 11:16:20 -07:00
2012-02-01 16:53:46 +08:00
2012-03-24 10:08:39 -07:00
2012-03-20 21:29:38 -04:00
2012-03-28 17:14:37 -07:00
2012-03-24 10:08:39 -07:00
2012-02-21 09:03:41 -08:00
2012-02-21 09:06:08 -08:00
2012-03-24 10:41:37 -07:00
2012-03-24 10:08:39 -07:00
2012-03-20 21:29:43 -04:00
2012-03-20 21:29:42 -04:00
2012-03-04 17:54:34 -05:00
2012-03-06 19:14:37 +02:00
2012-03-16 10:38:24 -04:00
2012-02-22 15:50:28 -05:00
2012-03-16 10:38:24 -04:00
2012-03-21 17:54:57 -07:00
2012-02-08 22:53:58 +02:00
2012-03-15 18:23:10 -07:00
2012-02-21 16:56:45 -05:00
2012-03-28 18:30:03 +01:00
2012-03-07 11:32:21 +00:00
2012-03-04 17:54:34 -05:00
2012-04-14 13:19:04 +02:00
2012-03-21 13:25:04 -07:00
2012-03-24 10:08:39 -07:00
2012-03-09 12:47:56 -08:00
2012-03-16 10:38:24 -04:00
2012-03-08 11:38:50 -08:00
2012-03-12 22:19:13 +01:00
2012-02-01 22:23:53 +05:30
2012-02-16 17:08:09 -05:00
2012-02-24 11:42:50 -08:00
2012-03-28 15:58:21 -07:00
2012-03-06 11:01:33 +02:00
2012-03-28 15:04:26 -07:00
2012-03-28 17:14:35 -07:00
2012-03-19 16:53:08 -04:00
2012-04-05 19:04:27 -04:00
2012-03-23 13:18:57 +01:00
2012-03-28 15:58:21 -07:00
2012-02-21 09:06:09 -08:00
2012-02-24 10:05:59 +01:00
2012-03-28 18:30:03 +01:00
2012-02-10 10:44:35 -08:00
2012-02-17 23:36:23 +01:00
2012-04-05 15:25:51 -07:00
2012-03-04 17:54:34 -05:00
2012-02-10 11:42:25 -08:00
2012-03-04 17:54:34 -05:00
2012-02-20 12:48:47 -08:00
2012-03-13 14:06:33 -04:00
2012-03-01 17:57:40 -05:00
2012-03-29 18:12:23 -07:00
2012-03-22 19:43:43 -07:00
2012-03-20 21:29:40 -04:00
2012-03-23 16:58:40 -07:00
2012-02-24 10:05:59 +01:00
2012-03-04 17:54:34 -05:00
2012-03-08 11:38:51 -08:00
2012-03-28 18:30:03 +01:00
2012-04-14 13:25:48 +02:00
2012-03-13 14:24:07 -07:00
2012-03-19 15:33:24 -03:00
2012-03-04 17:54:34 -05:00
2012-03-27 16:30:09 -07:00
2012-02-19 09:50:20 -06:00
2012-03-31 08:09:50 +05:30
2012-03-08 10:50:35 -08:00
2012-03-28 18:30:03 +01:00
2012-03-27 20:15:37 +02:00
2012-03-02 10:51:00 +01:00
2012-03-07 16:08:46 +01:00
cbc91f71b5