Buildresult: linus/sparc64-defconfig/sparc64-gcc5 built on Mar 28 2022, 19:44

kisskb

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Status:	OK
Date/Time:	Mar 28 2022, 19:44
Duration:	0:01:22.687037
Builder:	ka2
Revision:	mm: kfence: fix missing objcg housekeeping for SLAB (`ae085d7f9365de7da27ab5c0d16b12d51ea7fca9)`
Target:	linus/sparc64-defconfig/sparc64-gcc5
Branch:	linus
Compiler:	sparc64-gcc5 (sparc64-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.26.1)
Config:	defconfig (download)
Log:	Download original Possible warnings (2) <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp] WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version ... Full Log # git rev-parse -q --verify ae085d7f9365de7da27ab5c0d16b12d51ea7fca9^{commit} ae085d7f9365de7da27ab5c0d16b12d51ea7fca9 already have revision, skipping fetch # git checkout -q -f -B kisskb ae085d7f9365de7da27ab5c0d16b12d51ea7fca9 # git clean -qxdf # < git log -1 # commit ae085d7f9365de7da27ab5c0d16b12d51ea7fca9 # Author: Muchun Song <songmuchun@bytedance.com> # Date: Sun Mar 27 13:18:52 2022 +0800 # # mm: kfence: fix missing objcg housekeeping for SLAB # # The objcg is not cleared and put for kfence object when it is freed, # which could lead to memory leak for struct obj_cgroup and wrong # statistics of NR_SLAB_RECLAIMABLE_B or NR_SLAB_UNRECLAIMABLE_B. # # Since the last freed object's objcg is not cleared, # mem_cgroup_from_obj() could return the wrong memcg when this kfence # object, which is not charged to any objcgs, is reallocated to other # users. # # A real word issue [1] is caused by this bug. # # Link: https://lore.kernel.org/all/000000000000cabcb505dae9e577@google.com/ [1] # Reported-by: syzbot+f8c45ccc7d5d45fc5965@syzkaller.appspotmail.com # Fixes: d3fb45f370d9 ("mm, kfence: insert KFENCE hooks for SLAB") # Signed-off-by: Muchun Song <songmuchun@bytedance.com> # Cc: Dmitry Vyukov <dvyukov@google.com> # Cc: Marco Elver <elver@google.com> # Cc: Andrew Morton <akpm@linux-foundation.org> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version # < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version # < git log --format=%s --max-count=1 ae085d7f9365de7da27ab5c0d16b12d51ea7fca9 # < make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux- defconfig # < make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux- help # make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux- olddefconfig # make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux- <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp] WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version ... Is "_mcount" prototyped in <asm/asm-prototypes.h>? kernel: arch/sparc/boot/image is ready kernel: arch/sparc/boot/zImage is ready Completed OK # rm -rf /kisskb/build/linus_sparc64-defconfig_sparc64 # Build took: 0:01:22.687037

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