Files
linux/include/linux
Thomas Zimmermann 9ded47ad00 fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an
instance as part of initializing deferred I/O and remove it only after
the final mapping has been closed. If the fb_info and the contained
deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info
to invalidate the mapping. Any access will then result in a SIGBUS
signal.

Fixes a long-standing problem, where a device hot-unplug happens while
user space still has an active mapping of the graphics memory. The hot-
unplug frees the instance of struct fb_info. Accessing the memory will
operate on undefined state.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 60b59beafb ("fbdev: mm: Deferred IO support")
Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: stable@vger.kernel.org # v2.6.22+
Signed-off-by: Helge Deller <deller@gmx.de>
2026-03-09 13:06:48 +01:00
..
2026-02-11 13:44:47 +01:00
2025-10-22 07:54:33 +02:00
2026-01-29 20:21:41 +01:00
2025-12-15 14:33:38 +01:00
2025-09-05 15:06:03 +02:00
2026-01-20 19:44:19 -08:00
2026-02-12 04:23:53 -07:00
2025-11-21 11:21:31 +01:00
2025-09-23 11:13:22 +02:00
2025-12-16 14:40:51 +01:00
2025-10-22 07:55:00 +02:00
2025-11-01 12:44:49 -05:00
2025-12-13 20:04:32 +12:00
2025-08-21 13:58:07 +02:00
2026-02-19 09:12:05 +01:00
2025-12-23 11:23:10 -08:00
2025-10-29 18:28:29 -07:00
2025-09-13 17:32:44 -07:00
2025-08-29 13:39:53 -07:00
2026-01-12 16:52:09 +01:00
2025-11-04 12:36:02 +01:00
2026-02-06 07:29:14 -07:00
2025-10-22 07:53:15 +02:00
2025-09-23 11:13:22 +02:00
2026-01-05 16:43:31 +01:00
2026-01-11 06:09:11 -10:00
2026-01-20 19:24:50 -08:00
2026-01-26 19:03:47 -08:00
2025-11-23 12:30:40 +01:00
2025-12-29 11:53:38 +01:00
2026-01-26 20:02:27 -08:00
2025-09-17 15:58:29 -04:00
2025-11-04 19:10:33 -08:00
2025-09-23 13:28:20 -04:00
2025-11-05 23:58:20 +01:00
2025-11-03 17:41:17 +01:00
2025-11-11 10:01:30 +01:00
2026-02-20 17:31:55 -05:00
2026-01-30 11:34:34 +00:00
2025-09-13 16:55:07 -07:00
2026-02-10 11:39:31 +01:00
2026-02-10 11:39:30 +01:00
2026-01-11 06:09:11 -10:00
2025-08-24 11:41:11 -06:00
2025-10-30 18:35:26 +01:00
2025-10-24 21:39:27 +02:00
2025-10-31 10:16:23 +01:00
2025-11-27 14:24:30 -08:00
2025-11-18 17:52:54 +01:00
2026-01-11 06:09:11 -10:00
2025-11-28 09:21:18 -07:00
2026-02-23 11:19:18 +01:00
2026-01-05 16:43:30 +01:00
2026-01-31 14:22:57 -08:00
2026-01-14 12:04:34 +01:00
2026-01-06 17:06:03 -08:00
2026-01-11 06:09:11 -10:00
2025-11-03 17:41:18 +01:00
2026-01-20 19:24:47 -08:00
2026-01-30 18:26:59 -08:00