# 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/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 ae085d7f9365de7da27ab5c0d16b12d51ea7fca9
# < make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_HAVE_FTRACE_MCOUNT_RECORD=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/include/linux/string.h:20,
                 from /kisskb/src/include/linux/bitmap.h:11,
                 from /kisskb/src/include/linux/cpumask.h:12,
                 from /kisskb/src/include/linux/smp.h:13,
                 from /kisskb/src/include/linux/lockdep.h:14,
                 from /kisskb/src/include/linux/rcupdate.h:29,
                 from /kisskb/src/include/linux/rculist.h:11,
                 from /kisskb/src/include/linux/sched/signal.h:5,
                 from /kisskb/src/drivers/staging/rtl8723bs/include/drv_types.h:17,
                 from /kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c:7:
/kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c: In function 'wlanhdr_to_ethhdr':
/kisskb/src/arch/sparc/include/asm/string.h:15:25: error: '__builtin_memcpy' offset [0, 5] is out of the bounds [0, 0] [-Werror=array-bounds]
   15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c:1558:9: note: in expansion of macro 'memcpy'
 1558 |         memcpy(ptr, pattrib->dst, ETH_ALEN);
      |         ^~~~~~
/kisskb/src/arch/sparc/include/asm/string.h:15:25: error: '__builtin_memcpy' offset [0, 5] is out of the bounds [0, 0] [-Werror=array-bounds]
   15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c:1559:9: note: in expansion of macro 'memcpy'
 1559 |         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
      |         ^~~~~~
/kisskb/src/arch/sparc/include/asm/string.h:15:25: error: '__builtin_memcpy' offset [0, 5] is out of the bounds [0, 0] [-Werror=array-bounds]
   15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c:1558:9: note: in expansion of macro 'memcpy'
 1558 |         memcpy(ptr, pattrib->dst, ETH_ALEN);
      |         ^~~~~~
/kisskb/src/arch/sparc/include/asm/string.h:15:25: error: '__builtin_memcpy' offset [0, 5] is out of the bounds [0, 0] [-Werror=array-bounds]
   15 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/drivers/staging/rtl8723bs/core/rtw_recv.c:1559:9: note: in expansion of macro 'memcpy'
 1559 |         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
      |         ^~~~~~
cc1: all warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:289: drivers/staging/rtl8723bs/core/rtw_recv.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:551: drivers/staging/rtl8723bs] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:551: drivers/staging] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1830: drivers] Error 2
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 24 ARCH=sparc64 O=/kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sparc64-linux/bin/sparc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_sparc64-allmodconfig_sparc64-gcc11
# Build took: 0:17:30.626151