Buildresult: powerpc-next/44x/sequoia_defconfig/powerpc-gcc4.6 built on Jul 3 2018, 01:41

kisskb

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Status:	OK
Date/Time:	Jul 3 2018, 01:41
Duration:	0:00:34.567130
Builder:	ka3
Revision:	ocxl: Fix page fault handler in case of fault on dying process (`d497ebf5fb3a026c0817f8c96cde578787f24093)`
Target:	powerpc-next/44x/sequoia_defconfig/powerpc-gcc4.6
Branch:	powerpc-next
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3)
Config:	44x/sequoia_defconfig (download)
Log:	Download original Possible warnings (3) 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/tty/serial/8250/8250_core.c:251:18: warning: 'i' 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 80 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_sequoia_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- 44x/sequoia_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_sequoia_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/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/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/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here INFO: Uncompressed kernel (size 0x479b1c) 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 01:41:44 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2261939 Bytes = 2208.92 kB = 2.16 MB Load Address: 00500000 Entry Point: 0050110c Completed OK # rm -rf /kisskb/build/powerpc-next_44x_sequoia_defconfig_powerpc # Build took: 0:00:34.567130

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