Buildresult: crypto/x86_64-allnoconfig/x86_64-gcc4.6 built on Jul 4 2019, 01:04

kisskb

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Status:	OK
Date/Time:	Jul 4 2019, 01:04
Duration:	0:00:17.304106
Builder:	ka3
Revision:	crypto: user - prevent operating on larval algorithms (`21d4120ec6f5b5992b01b96ac484701163917b63)`
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:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/apic/io_apic.c:1036:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/e820.c:651:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 21d4120ec6f5b5992b01b96ac484701163917b63^{commit} 21d4120ec6f5b5992b01b96ac484701163917b63 already have revision, skipping fetch # git checkout -q -f -B kisskb 21d4120ec6f5b5992b01b96ac484701163917b63 # git clean -qxdf # < git log -1 # commit 21d4120ec6f5b5992b01b96ac484701163917b63 # Author: Eric Biggers <ebiggers@google.com> # Date: Tue Jul 2 14:17:00 2019 -0700 # # crypto: user - prevent operating on larval algorithms # # Michal Suchanek reported [1] that running the pcrypt_aead01 test from # LTP [2] in a loop and holding Ctrl-C causes a NULL dereference of # alg->cra_users.next in crypto_remove_spawns(), via crypto_del_alg(). # The test repeatedly uses CRYPTO_MSG_NEWALG and CRYPTO_MSG_DELALG. # # The crash occurs when the instance that CRYPTO_MSG_DELALG is trying to # unregister isn't a real registered algorithm, but rather is a "test # larval", which is a special "algorithm" added to the algorithms list # while the real algorithm is still being tested. Larvals don't have # initialized cra_users, so that causes the crash. Normally pcrypt_aead01 # doesn't trigger this because CRYPTO_MSG_NEWALG waits for the algorithm # to be tested; however, CRYPTO_MSG_NEWALG returns early when interrupted. # # Everything else in the "crypto user configuration" API has this same bug # too, i.e. it inappropriately allows operating on larval algorithms # (though it doesn't look like the other cases can cause a crash). # # Fix this by making crypto_alg_match() exclude larval algorithms. # # [1] https://lkml.kernel.org/r/20190625071624.27039-1-msuchanek@suse.de # [2] https://github.com/linux-test-project/ltp/blob/20190517/testcases/kernel/crypto/pcrypt_aead01.c # # Reported-by: Michal Suchanek <msuchanek@suse.de> # Fixes: a38f7907b926 ("crypto: Add userspace configuration API") # Cc: <stable@vger.kernel.org> # v3.2+ # Cc: Steffen Klassert <steffen.klassert@secunet.com> # Signed-off-by: Eric Biggers <ebiggers@google.com> # 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 21d4120ec6f5b5992b01b96ac484701163917b63 # < make -s -j 80 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 80 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:187:16: 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:1036:6: 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:651:16: 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: 0:00:17.304106

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