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| author | Jeremy Kerr <jk@ozlabs.org> | 2008-01-11 14:27:10 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-11 11:47:42 -0800 |
| commit | ba21611c9c0031ca8388cae5e43b38c29c8b595d (patch) | |
| tree | c2062639f66ea8aebd1b874f291cfdcc6aee7e27 /drivers/video/ps3fb.c | |
| parent | b506d1b6c49a5884ff67a29bc99a1912ee20acee (diff) | |
| download | linux-ba21611c9c0031ca8388cae5e43b38c29c8b595d.tar.gz linux-ba21611c9c0031ca8388cae5e43b38c29c8b595d.tar.bz2 linux-ba21611c9c0031ca8388cae5e43b38c29c8b595d.zip | |
ps3fb: prevent use after free of fb_info
In ps3fb_shutdown, freeing the framebuffer will cause fb_info (in
dev->core.driver_data) to be free()ed, which we potentially access
from the ps3fbd kthread.
This change frees the framebuffer after stopping the ps3fbd kthread.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/ps3fb.c')
| -rw-r--r-- | drivers/video/ps3fb.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/video/ps3fb.c b/drivers/video/ps3fb.c index b3128903d673..ae07e02943d8 100644 --- a/drivers/video/ps3fb.c +++ b/drivers/video/ps3fb.c @@ -1234,12 +1234,6 @@ static int ps3fb_shutdown(struct ps3_system_bus_device *dev) ps3fb_flip_ctl(0, &ps3fb); /* flip off */ ps3fb.dinfo->irq.mask = 0; - if (info) { - unregister_framebuffer(info); - fb_dealloc_cmap(&info->cmap); - framebuffer_release(info); - } - ps3av_register_flip_ctl(NULL, NULL); if (ps3fb.task) { struct task_struct *task = ps3fb.task; @@ -1250,6 +1244,12 @@ static int ps3fb_shutdown(struct ps3_system_bus_device *dev) free_irq(ps3fb.irq_no, &dev->core); ps3_irq_plug_destroy(ps3fb.irq_no); } + if (info) { + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + framebuffer_release(info); + info = dev->core.driver_data = NULL; + } iounmap((u8 __iomem *)ps3fb.dinfo); status = lv1_gpu_context_free(ps3fb.context_handle); |