Buildresult: crypto/x86_64-allnoconfig/x86_64-gcc4.6 built on Feb 22 2019, 18:05

kisskb

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Status:	OK
Date/Time:	Feb 22 2019, 18:05
Duration:	0:00:16.529093
Builder:	ka4
Revision:	crypto: sha512/arm - fix crash bug in Thumb2 build (`c64316502008064c158fa40cc250665e461b0f2a)`
Target:	crypto/x86_64-allnoconfig/x86_64-gcc4.6
Branch:	crypto
Compiler:	x86_64-gcc4.6 (x86_64-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	allnoconfig (download)
Log:	Download original Possible warnings (3) kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/apic/io_apic.c:1034:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/e820.c:650:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify c64316502008064c158fa40cc250665e461b0f2a^{commit} c64316502008064c158fa40cc250665e461b0f2a already have revision, skipping fetch # git checkout -q -f -B kisskb c64316502008064c158fa40cc250665e461b0f2a # git clean -qxdf # < git log -1 # commit c64316502008064c158fa40cc250665e461b0f2a # Author: Ard Biesheuvel <ard.biesheuvel@linaro.org> # Date: Sat Feb 16 14:51:26 2019 +0100 # # crypto: sha512/arm - fix crash bug in Thumb2 build # # The SHA512 code we adopted from the OpenSSL project uses a rather # peculiar way to take the address of the round constant table: it # takes the address of the sha256_block_data_order() routine, and # substracts a constant known quantity to arrive at the base of the # table, which is emitted by the same assembler code right before # the routine's entry point. # # However, recent versions of binutils have helpfully changed the # behavior of references emitted via an ADR instruction when running # in Thumb2 mode: it now takes the Thumb execution mode bit into # account, which is bit 0 af the address. This means the produced # table address also has bit 0 set, and so we end up with an address # value pointing 1 byte past the start of the table, which results # in crashes such as # # Unable to handle kernel paging request at virtual address bf825000 # pgd = 42f44b11 # [bf825000] pgd=80000040206003, pmd=5f1bd003, *pte=00000000 # Internal error: Oops: 207 [#1] PREEMPT SMP THUMB2 # Modules linked in: sha256_arm(+) sha1_arm_ce sha1_arm ... # CPU: 7 PID: 396 Comm: cryptomgr_test Not tainted 5.0.0-rc6+ #144 # Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 # PC is at sha256_block_data_order+0xaaa/0xb30 [sha256_arm] # LR is at __this_module+0x17fd/0xffffe800 [sha256_arm] # pc : [<bf820bca>] lr : [<bf824ffd>] psr: 800b0033 # sp : ebc8bbe8 ip : faaabe1c fp : 2fdd3433 # r10: 4c5f1692 r9 : e43037df r8 : b04b0a5a # r7 : c369d722 r6 : 39c3693e r5 : 7a013189 r4 : 1580d26b # r3 : 8762a9b0 r2 : eea9c2cd r1 : 3e9ab536 r0 : 1dea4ae7 # Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment user # Control: 70c5383d Table: 6b8467c0 DAC: dbadc0de # Process cryptomgr_test (pid: 396, stack limit = 0x69e1fe23) # Stack: (0xebc8bbe8 to 0xebc8c000) # ... # unwind: Unknown symbol address bf820bca # unwind: Index not found bf820bca # Code: 441a ea80 40f9 440a (f85e) 3b04 # ---[ end trace e560cce92700ef8a ]--- # # Given that this affects older kernels as well, in case they are built # with a recent toolchain, apply a minimal backportable fix, which is # to emit another non-code label at the start of the routine, and # reference that instead. (This is similar to the current upstream state # of this file in OpenSSL) # # Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> # Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 c64316502008064c158fa40cc250665e461b0f2a # < make -s -j 10 ARCH=x86_64 O=/kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux- allnoconfig # make -s -j 10 ARCH=x86_64 O=/kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/x86/kernel/apic/io_apic.c: In function 'mp_map_pin_to_irq': /kisskb/src/arch/x86/kernel/apic/io_apic.c:1034:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap': /kisskb/src/arch/x86/kernel/e820.c:650:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc4.6 # Build took: 0:00:16.529093

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