Buildresult: powerpc-fixes/powernv_defconfig+NO_NUMA/powerpc-gcc5 built on Oct 25 2019, 20:07

kisskb

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Status:	OK
Date/Time:	Oct 25 2019, 20:07
Duration:	0:02:47.946150
Builder:	ka2
Revision:	powernv/eeh: Fix oops when probing cxl devices (`f112cb18162f4956fda5f69509e1857ce922ba58)`
Target:	powerpc-fixes/powernv_defconfig+NO_NUMA/powerpc-gcc5
Branch:	powerpc-fixes
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	powernv_defconfig+NO_NUMA (download)
Log:	Download original Possible warnings (2) include/linux/kernel.h:37:33: warning: 'clone_src_i_size' may be used uninitialized in this function [-Wmaybe-uninitialized] WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel() Full Log # git rev-parse -q --verify f112cb18162f4956fda5f69509e1857ce922ba58^{commit} f112cb18162f4956fda5f69509e1857ce922ba58 already have revision, skipping fetch # git checkout -q -f -B kisskb f112cb18162f4956fda5f69509e1857ce922ba58 # git clean -qxdf # < git log -1 # commit f112cb18162f4956fda5f69509e1857ce922ba58 # Author: Frederic Barrat <fbarrat@linux.ibm.com> # Date: Wed Oct 16 18:28:33 2019 +0200 # # powernv/eeh: Fix oops when probing cxl devices # # Recent cleanup in the way EEH support is added to a device causes a # kernel oops when the cxl driver probes a device and creates virtual # devices discovered on the FPGA: # # BUG: Kernel NULL pointer dereference at 0x000000a0 # Faulting instruction address: 0xc000000000048070 # Oops: Kernel access of bad area, sig: 7 [#1] # ... # NIP [c000000000048070] eeh_add_device_late.part.9+0x50/0x1e0 # LR [c00000000004805c] eeh_add_device_late.part.9+0x3c/0x1e0 # Call Trace: # [c000200e43983900] [c00000000079e250] _dev_info+0x5c/0x6c (unreliable) # [c000200e43983980] [c0000000000d1ad0] pnv_pcibios_bus_add_device+0x60/0xb0 # [c000200e439839f0] [c0000000000606d0] pcibios_bus_add_device+0x40/0x60 # [c000200e43983a10] [c0000000006aa3a0] pci_bus_add_device+0x30/0x100 # [c000200e43983a80] [c0000000006aa4d4] pci_bus_add_devices+0x64/0xd0 # [c000200e43983ac0] [c00800001c429118] cxl_pci_vphb_add+0xe0/0x130 [cxl] # [c000200e43983b00] [c00800001c4242ac] cxl_probe+0x504/0x5b0 [cxl] # [c000200e43983bb0] [c0000000006bba1c] local_pci_probe+0x6c/0x110 # [c000200e43983c30] [c000000000159278] work_for_cpu_fn+0x38/0x60 # # The root cause is that those cxl virtual devices don't have a # representation in the device tree and therefore no associated pci_dn # structure. In eeh_add_device_late(), pdn is NULL, so edev is NULL and # we oops. # # We never had explicit support for EEH for those virtual # devices. Instead, EEH events are reported to the (real) pci device and # handled by the cxl driver. Which can then forward to the virtual # devices and handle dependencies. The fact that we try adding EEH # support for the virtual devices is new and a side-effect of the recent # cleanup. # # This patch fixes it by skipping adding EEH support on powernv for # devices which don't have a pci_dn structure. # # The cxl driver doesn't create virtual devices on pseries so this patch # doesn't fix it there intentionally. # # Fixes: b905f8cdca77 ("powerpc/eeh: EEH for pSeries hot plug") # Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com> # Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20191016162833.22509-1-fbarrat@linux.ibm.com # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 f112cb18162f4956fda5f69509e1857ce922ba58 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- powernv_defconfig # Added to kconfig CONFIG_NUMA=n # yes \n \| make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- oldconfig yes: standard output: Broken pipe # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/list.h:9:0, from /kisskb/src/include/linux/wait.h:7, from /kisskb/src/include/linux/wait_bit.h:8, from /kisskb/src/include/linux/fs.h:6, from /kisskb/src/fs/btrfs/send.c:7: /kisskb/src/fs/btrfs/send.c: In function 'process_extent': /kisskb/src/include/linux/kernel.h:37:33: warning: 'clone_src_i_size' may be used uninitialized in this function [-Wmaybe-uninitialized] #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) ^ /kisskb/src/fs/btrfs/send.c:5088:6: note: 'clone_src_i_size' was declared here u64 clone_src_i_size; ^ WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel() The function start_here_common() references the function __init start_kernel(). This is often because start_here_common lacks a __init annotation or the annotation of start_kernel is wrong. Completed OK # rm -rf /kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 # Build took: 0:02:47.946150

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