Buildresult: powerpc-next/arm64-defconfig/arm64-gcc5 built on Aug 25 2019, 22:18

kisskb

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Status:	OK
Date/Time:	Aug 25 2019, 22:18
Duration:	0:05:05.456752
Builder:	blade46
Revision:	powerpc/spinlocks: Fix oops in shared-processor spinlocks (`5faa15883ebc90132b58c685316de2cd24735e90)`
Target:	powerpc-next/arm64-defconfig/arm64-gcc5
Branch:	powerpc-next
Compiler:	arm64-gcc5 (aarch64-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.25.1)
Config:	defconfig (download)
Log:	Download original Possible warnings (2) drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized] include/linux/spinlock.h:288:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized] Full Log # git rev-parse -q --verify 5faa15883ebc90132b58c685316de2cd24735e90^{commit} 5faa15883ebc90132b58c685316de2cd24735e90 already have revision, skipping fetch # git checkout -q -f -B kisskb 5faa15883ebc90132b58c685316de2cd24735e90 # git clean -qxdf # < git log -1 # commit 5faa15883ebc90132b58c685316de2cd24735e90 # Author: Christopher M. Riedl <cmr@informatik.wtf> # Date: Mon Aug 12 22:13:14 2019 -0500 # # powerpc/spinlocks: Fix oops in shared-processor spinlocks # # Booting w/ ppc64le_defconfig + CONFIG_PREEMPT results in the attached # kernel trace due to calling shared-processor spinlocks while not # running in an SPLPAR. Previously, the out-of-line spinlocks # implementations were selected based on CONFIG_PPC_SPLPAR at compile # time without a runtime shared-processor LPAR check. # # To fix, call the actual spinlock implementations from a set of common # functions, spin_yield() and rw_yield(), which check for # shared-processor LPAR during runtime and select the appropriate lock # implementation. # # BUG: Kernel NULL pointer dereference at 0x00000100 # Faulting instruction address: 0xc000000000097f88 # Oops: Kernel access of bad area, sig: 7 [#1] # LE PAGE_SIZE=64K MMU=Radix MMU=Hash PREEMPT SMP NR_CPUS=2048 NUMA PowerNV # Modules linked in: # CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.2.0-rc6-00491-g249155c20f9b #28 # NIP: c000000000097f88 LR: c000000000c07a88 CTR: c00000000015ca10 # REGS: c0000000727079f0 TRAP: 0300 Not tainted (5.2.0-rc6-00491-g249155c20f9b) # MSR: 9000000002009033 <SF,HV,VEC,EE,ME,IR,DR,RI,LE> CR: 84000424 XER: 20040000 # CFAR: c000000000c07a84 DAR: 0000000000000100 DSISR: 00080000 IRQMASK: 1 # GPR00: c000000000c07a88 c000000072707c80 c000000001546300 c00000007be38a80 # GPR04: c0000000726f0c00 0000000000000002 c00000007279c980 0000000000000100 # GPR08: c000000001581b78 0000000080000001 0000000000000008 c00000007279c9b0 # GPR12: 0000000000000000 c000000001730000 c000000000142558 0000000000000000 # GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 # GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 # GPR24: c00000007be38a80 c000000000c002f4 0000000000000000 0000000000000000 # GPR28: c000000072221a00 c0000000726c2600 c00000007be38a80 c00000007be38a80 # NIP [c000000000097f88] __spin_yield+0x48/0xa0 # LR [c000000000c07a88] __raw_spin_lock+0xb8/0xc0 # Call Trace: # [c000000072707c80] [c000000072221a00] 0xc000000072221a00 (unreliable) # [c000000072707cb0] [c000000000bffb0c] __schedule+0xbc/0x850 # [c000000072707d70] [c000000000c002f4] schedule+0x54/0x130 # [c000000072707da0] [c0000000001427dc] kthreadd+0x28c/0x2b0 # [c000000072707e20] [c00000000000c1cc] ret_from_kernel_thread+0x5c/0x70 # Instruction dump: # 4d9e0020 552a043e 210a07ff 79080fe0 0b080000 3d020004 3908b878 794a1f24 # e8e80000 7ce7502a e8e70000 38e70100 <7ca03c2c> 70a70001 78a50020 4d820020 # ---[ end trace 474d6b2b8fc5cb7e ]--- # # Fixes: 499dcd41378e ("powerpc/64s: Allocate LPPACAs individually") # Signed-off-by: Christopher M. Riedl <cmr@informatik.wtf> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20190813031314.1828-4-cmr@informatik.wtf # < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version # < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version # < git log --format=%s --max-count=1 5faa15883ebc90132b58c685316de2cd24735e90 # < make -s -j 32 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux- defconfig # make -s -j 32 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux- arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum arch/arm64/Makefile:38: LSE atomics not supported by binutils arch/arm64/Makefile:56: CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr': /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized] pd->msg->buf[real_pos] = data; ^ /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:372:16: note: 'data' was declared here unsigned char data; ^ In file included from /kisskb/src/include/linux/rwsem.h:16:0, from /kisskb/src/include/linux/notifier.h:15, from /kisskb/src/include/linux/clk.h:14, from /kisskb/src/drivers/tty/serial/sh-sci.c:24: /kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_dma_rx_submit': /kisskb/src/include/linux/spinlock.h:288:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized] _raw_spin_unlock_irqrestore(lock, flags); \ ^ /kisskb/src/drivers/tty/serial/sh-sci.c:1353:16: note: 'flags' was declared here unsigned long flags; ^ Completed OK # rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 # Build took: 0:05:05.456752

© Michael Ellerman 2006-2018.