Buildresult: powerpc-fixes/arm64-defconfig/arm64-gcc5 built on May 15 2019, 04:54

kisskb

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Status:	OK
Date/Time:	May 15 2019, 04:54
Duration:	0:03:51.339674
Builder:	ka1
Revision:	powerpc/mm: Fix crashes with hugepages & 4K pages (`2d4f9bdc22740d10984b850bdd74a86ad8ed3d23)`
Target:	powerpc-fixes/arm64-defconfig/arm64-gcc5
Branch:	powerpc-fixes
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 (9) <stdin>:1388:2: warning: #warning syscall open_tree not implemented [-Wcpp] <stdin>:1391:2: warning: #warning syscall move_mount not implemented [-Wcpp] <stdin>:1394:2: warning: #warning syscall fsopen not implemented [-Wcpp] <stdin>:1397:2: warning: #warning syscall fsconfig not implemented [-Wcpp] <stdin>:1400:2: warning: #warning syscall fsmount not implemented [-Wcpp] <stdin>:1403:2: warning: #warning syscall fspick not implemented [-Wcpp] net/ipv4/fib_semantics.c:1027:12: warning: 'err' may be used uninitialized in this function [-Wmaybe-uninitialized] 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 2d4f9bdc22740d10984b850bdd74a86ad8ed3d23^{commit} 2d4f9bdc22740d10984b850bdd74a86ad8ed3d23 already have revision, skipping fetch # git checkout -q -f -B kisskb 2d4f9bdc22740d10984b850bdd74a86ad8ed3d23 # git clean -qxdf # < git log -1 # commit 2d4f9bdc22740d10984b850bdd74a86ad8ed3d23 # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Tue May 14 23:00:58 2019 +1000 # # powerpc/mm: Fix crashes with hugepages & 4K pages # # The recent commit to cleanup ifdefs in the hugepage initialisation led # to crashes when using 4K pages as reported by Sachin: # # BUG: Kernel NULL pointer dereference at 0x0000001c # Faulting instruction address: 0xc000000001d1e58c # Oops: Kernel access of bad area, sig: 11 [#1] # LE PAGE_SIZE=4K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries # ... # CPU: 3 PID: 4635 Comm: futex_wake04 Tainted: G W O 5.1.0-next-20190507-autotest #1 # NIP: c000000001d1e58c LR: c000000001d1e54c CTR: 0000000000000000 # REGS: c000000004937890 TRAP: 0300 # MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 22424822 XER: 00000000 # CFAR: c00000000183e9e0 DAR: 000000000000001c DSISR: 40000000 IRQMASK: 0 # ... # NIP kmem_cache_alloc+0xbc/0x5a0 # LR kmem_cache_alloc+0x7c/0x5a0 # Call Trace: # huge_pte_alloc+0x580/0x950 # hugetlb_fault+0x9a0/0x1250 # handle_mm_fault+0x490/0x4a0 # __do_page_fault+0x77c/0x1f00 # do_page_fault+0x28/0x50 # handle_page_fault+0x18/0x38 # # This is caused by us trying to allocate from a NULL kmem cache in # __hugepte_alloc(). The kmem cache is NULL because it was never # allocated in hugetlbpage_init(), because add_huge_page_size() returned # an error. # # The reason add_huge_page_size() returned an error is a simple typo, we # are calling check_and_get_huge_psize(size) when we should be passing # shift instead. # # The fact that we're able to trigger this path when the kmem caches are # NULL is a separate bug, ie. we should not advertise any hugepage sizes # if we haven't setup the required caches for them. # # This was only seen with 4K pages, with 64K pages we don't need to # allocate any extra kmem caches because the 16M hugepage just occupies # a single entry at the PMD level. # # Fixes: 723f268f19da ("powerpc/mm: cleanup ifdef mess in add_huge_page_size()") # Reported-by: Sachin Sant <sachinp@linux.ibm.com> # Tested-by: Sachin Sant <sachinp@linux.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /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 2d4f9bdc22740d10984b850bdd74a86ad8ed3d23 # < make -s -j 48 ARCH=arm64 O=/kisskb/build/powerpc-fixes_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux- defconfig # make -s -j 48 ARCH=arm64 O=/kisskb/build/powerpc-fixes_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:40: LSE atomics not supported by binutils <stdin>:1388:2: warning: #warning syscall open_tree not implemented [-Wcpp] <stdin>:1391:2: warning: #warning syscall move_mount not implemented [-Wcpp] <stdin>:1394:2: warning: #warning syscall fsopen not implemented [-Wcpp] <stdin>:1397:2: warning: #warning syscall fsconfig not implemented [-Wcpp] <stdin>:1400:2: warning: #warning syscall fsmount not implemented [-Wcpp] <stdin>:1403:2: warning: #warning syscall fspick not implemented [-Wcpp] /kisskb/src/net/ipv4/fib_semantics.c: In function 'fib_check_nh_v4_gw': /kisskb/src/net/ipv4/fib_semantics.c:1027:12: warning: 'err' may be used uninitialized in this function [-Wmaybe-uninitialized] if (!tbl \|\| err) { ^ /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:17, 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-fixes_arm64-defconfig_arm64-gcc5.4 # Build took: 0:03:51.339674

© Michael Ellerman 2006-2018.