Buildresult: powerpc-next/85xx/stx_gp3_defconfig/powerpc-gcc4.6 built on Jul 3 2018, 01:37
kisskb
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Status:
OK
Date/Time:
Jul 3 2018, 01:37
Duration:
0:00:19.817030
Builder:
ka4
Revision:
ocxl: Fix page fault handler in case of fault on dying process (
d497ebf5fb3a026c0817f8c96cde578787f24093)
Target:
powerpc-next/85xx/stx_gp3_defconfig/powerpc-gcc4.6
Branch:
powerpc-next
Compiler:
powerpc-gcc4.6
(powerpc-linux-gcc (GCC) 4.6.3)
Config:
85xx/stx_gp3_defconfig
(
download
)
Log:
Download original
Possible warnings (4)
kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized] fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
Full Log
# git rev-parse -q --verify d497ebf5fb3a026c0817f8c96cde578787f24093^{commit} d497ebf5fb3a026c0817f8c96cde578787f24093 already have revision, skipping fetch # git checkout -q -f -B kisskb d497ebf5fb3a026c0817f8c96cde578787f24093 # git clean -qxdf # < git log -1 # commit d497ebf5fb3a026c0817f8c96cde578787f24093 # Author: Frederic Barrat <fbarrat@linux.ibm.com> # Date: Mon Jun 18 14:14:36 2018 +0200 # # ocxl: Fix page fault handler in case of fault on dying process # # If a process exits without doing proper cleanup, there's a window # where an opencapi device can try to access the memory of the dying # process and may trigger a page fault. That's an expected scenario and # the ocxl driver holds a reference on the mm_struct of the process # until the opencapi device is notified of the process exiting. # However, if mm_users is already at 0, i.e. the address space of the # process has already been destroyed, the driver shouldn't try resolving # the page fault, as it will fail, but it can also try accessing already # freed data. # # It is fixed by only calling the bottom half of the page fault handler # if mm_users is greater than 0 and get a reference on mm_users instead # of mm_count. Otherwise, we can safely return a translation fault to # the device, as its associated memory context is being removed. The # opencapi device will be properly cleaned up shortly after when closing # the file descriptors. # # Fixes: 5ef3166e8a32 ("ocxl: Driver code for 'generic' opencapi devices") # Cc: stable@vger.kernel.org # v4.16+ # Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com> # Reviewed-By: Alastair D'Silva <alastair@d-silva.org> # Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 d497ebf5fb3a026c0817f8c96cde578787f24093 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_stx_gp3_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- 85xx/stx_gp3_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_stx_gp3_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:339:21: note: 'pdeo' was declared here /kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence': /kisskb/src/drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] INFO: Uncompressed kernel (size 0x4e8898) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Image Name: Linux-4.18.0-rc3-gd497ebf Created: Tue Jul 3 01:37:41 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2524543 Bytes = 2465.37 kB = 2.41 MB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-next_85xx_stx_gp3_defconfig_powerpc # Build took: 0:00:19.817030
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