Buildresult: crypto/pseries_defconfig+POWERNV=n/powerpc-gcc4.9 built on Sep 4 2020, 20:44

kisskb

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Status:	OK
Date/Time:	Sep 4 2020, 20:44
Duration:	0:02:50.031611
Builder:	ka2
Revision:	padata: fix possible padata_works_lock deadlock (`1b0df11fde0f14a269a181b3b7f5122415bc5ed7)`
Target:	crypto/pseries_defconfig+POWERNV=n/powerpc-gcc4.9
Branch:	crypto
Compiler:	powerpc-gcc4.9 (powerpc64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	pseries_defconfig+POWERNV=n (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 1b0df11fde0f14a269a181b3b7f5122415bc5ed7^{commit} 1b0df11fde0f14a269a181b3b7f5122415bc5ed7 already have revision, skipping fetch # git checkout -q -f -B kisskb 1b0df11fde0f14a269a181b3b7f5122415bc5ed7 # git clean -qxdf # < git log -1 # commit 1b0df11fde0f14a269a181b3b7f5122415bc5ed7 # Author: Daniel Jordan <daniel.m.jordan@oracle.com> # Date: Wed Sep 2 13:07:56 2020 -0400 # # padata: fix possible padata_works_lock deadlock # # syzbot reports, # # WARNING: inconsistent lock state # 5.9.0-rc2-syzkaller #0 Not tainted # -------------------------------- # inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. # syz-executor.0/26715 takes: # (padata_works_lock){+.?.}-{2:2}, at: padata_do_parallel kernel/padata.c:220 # {IN-SOFTIRQ-W} state was registered at: # spin_lock include/linux/spinlock.h:354 [inline] # padata_do_parallel kernel/padata.c:220 # ... # __do_softirq kernel/softirq.c:298 # ... # sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1091 # asm_sysvec_apic_timer_interrupt arch/x86/include/asm/idtentry.h:581 # # Possible unsafe locking scenario: # # CPU0 # ---- # lock(padata_works_lock); # <Interrupt> # lock(padata_works_lock); # # padata_do_parallel() takes padata_works_lock with softirqs enabled, so a # deadlock is possible if, on the same CPU, the lock is acquired in # process context and then softirq handling done in an interrupt leads to # the same path. # # Fix by leaving softirqs disabled while do_parallel holds # padata_works_lock. # # Reported-by: syzbot+f4b9f49e38e25eb4ef52@syzkaller.appspotmail.com # Fixes: 4611ce2246889 ("padata: allocate work structures for parallel jobs from a pool") # Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> # Cc: Herbert Xu <herbert@gondor.apana.org.au> # Cc: Steffen Klassert <steffen.klassert@secunet.com> # Cc: linux-crypto@vger.kernel.org # Cc: linux-kernel@vger.kernel.org # Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 1b0df11fde0f14a269a181b3b7f5122415bc5ed7 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/crypto_pseries_defconfig+POWERNV=n_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- pseries_defconfig # Added to kconfig CONFIG_PPC_POWERNV=n # < make -s -j 48 ARCH=powerpc O=/kisskb/build/crypto_pseries_defconfig+POWERNV=n_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/crypto_pseries_defconfig+POWERNV=n_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/crypto_pseries_defconfig+POWERNV=n_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- Completed OK # rm -rf /kisskb/build/crypto_pseries_defconfig+POWERNV=n_powerpc-gcc4.9 # Build took: 0:02:50.031611

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