diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2011-04-27 13:24:19 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-04-27 23:16:45 (GMT) |
| commit | b7b4d3426d2b5ecab21578eb20d8e456a1aace8f (patch) | |
| tree | b02b9f95a2aae744e62b2b5c6ea46c7327efb276 | |
| parent | c919c2a073c5d2e076e52a56b44281d922721b61 (diff) | |
| download | linux-b7b4d3426d2b5ecab21578eb20d8e456a1aace8f.tar.xz | |
mmc: sdhci: Check mrq->cmd in sdhci_tasklet_finish
It seems that under certain circumstances that the sdhci_tasklet_finish()
call can be entered with mrq->cmd set to NULL, causing the system to crash
with a NULL pointer de-reference.
Unable to handle kernel NULL pointer dereference at virtual address 00000000
PC is at sdhci_tasklet_finish+0x34/0xe8
LR is at sdhci_tasklet_finish+0x24/0xe8
Seen on S3C6410 system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 9e15f41..fd8f488 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1345,7 +1345,7 @@ static void sdhci_tasklet_finish(unsigned long param) * upon error conditions. */ if (!(host->flags & SDHCI_DEVICE_DEAD) && - (mrq->cmd->error || + ((mrq->cmd && mrq->cmd->error) || (mrq->data && (mrq->data->error || (mrq->data->stop && mrq->data->stop->error))) || (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { |