| Message ID | 1424277299-24964-1-git-send-email-geert+renesas@glider.be (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Ping? On Wed, Feb 18, 2015 at 5:34 PM, Geert Uytterhoeven <geert+renesas@glider.be> wrote: > If CONFIG_DEBUG_SLAB=y: > > sh_mobile_sdhi ee100000.sd: Got CD GPIO > sh_mobile_sdhi ee100000.sd: Got WP GPIO > platform ee100000.sd: Driver sh_mobile_sdhi requests probe deferral > ... > Slab corruption (Not tainted): kmalloc-1024 start=ed8b3c00, len=1024 > 2d0: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ....kkkkkkkkkkkk > Prev obj: start=ed8b3800, len=1024 > 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > > Struct tmio_mmc_host is embedded inside struct mmc_host, and thus is > freed by the call to mmc_free_host(). Hence it must not be written to > afterwards, as that will corrupt freed (and perhaps already reused) > memory. > > Fixes: 94b110aff8679b14 ("mmc: tmio: add tmio_mmc_host_alloc/free()") > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> > --- > drivers/mmc/host/tmio_mmc_pio.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c > index a31c3573d386f8c6..dba7e1c19dd758e7 100644 > --- a/drivers/mmc/host/tmio_mmc_pio.c > +++ b/drivers/mmc/host/tmio_mmc_pio.c > @@ -1073,8 +1073,6 @@ EXPORT_SYMBOL(tmio_mmc_host_alloc); > void tmio_mmc_host_free(struct tmio_mmc_host *host) > { > mmc_free_host(host->mmc); > - > - host->mmc = NULL; > } > EXPORT_SYMBOL(tmio_mmc_host_free); > > -- > 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 18 February 2015 at 17:34, Geert Uytterhoeven <geert+renesas@glider.be> wrote: > If CONFIG_DEBUG_SLAB=y: > > sh_mobile_sdhi ee100000.sd: Got CD GPIO > sh_mobile_sdhi ee100000.sd: Got WP GPIO > platform ee100000.sd: Driver sh_mobile_sdhi requests probe deferral > ... > Slab corruption (Not tainted): kmalloc-1024 start=ed8b3c00, len=1024 > 2d0: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ....kkkkkkkkkkkk > Prev obj: start=ed8b3800, len=1024 > 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > > Struct tmio_mmc_host is embedded inside struct mmc_host, and thus is > freed by the call to mmc_free_host(). Hence it must not be written to > afterwards, as that will corrupt freed (and perhaps already reused) > memory. > > Fixes: 94b110aff8679b14 ("mmc: tmio: add tmio_mmc_host_alloc/free()") > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Applied, thanks! Kind regards Uffe > --- > drivers/mmc/host/tmio_mmc_pio.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c > index a31c3573d386f8c6..dba7e1c19dd758e7 100644 > --- a/drivers/mmc/host/tmio_mmc_pio.c > +++ b/drivers/mmc/host/tmio_mmc_pio.c > @@ -1073,8 +1073,6 @@ EXPORT_SYMBOL(tmio_mmc_host_alloc); > void tmio_mmc_host_free(struct tmio_mmc_host *host) > { > mmc_free_host(host->mmc); > - > - host->mmc = NULL; > } > EXPORT_SYMBOL(tmio_mmc_host_free); > > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index a31c3573d386f8c6..dba7e1c19dd758e7 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -1073,8 +1073,6 @@ EXPORT_SYMBOL(tmio_mmc_host_alloc); void tmio_mmc_host_free(struct tmio_mmc_host *host) { mmc_free_host(host->mmc); - - host->mmc = NULL; } EXPORT_SYMBOL(tmio_mmc_host_free);
If CONFIG_DEBUG_SLAB=y: sh_mobile_sdhi ee100000.sd: Got CD GPIO sh_mobile_sdhi ee100000.sd: Got WP GPIO platform ee100000.sd: Driver sh_mobile_sdhi requests probe deferral ... Slab corruption (Not tainted): kmalloc-1024 start=ed8b3c00, len=1024 2d0: 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ....kkkkkkkkkkkk Prev obj: start=ed8b3800, len=1024 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Struct tmio_mmc_host is embedded inside struct mmc_host, and thus is freed by the call to mmc_free_host(). Hence it must not be written to afterwards, as that will corrupt freed (and perhaps already reused) memory. Fixes: 94b110aff8679b14 ("mmc: tmio: add tmio_mmc_host_alloc/free()") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- drivers/mmc/host/tmio_mmc_pio.c | 2 -- 1 file changed, 2 deletions(-)