Buildresult: linus-rand/arm64-randconfig/arm64-gcc8 built on Oct 19 2018, 04:57

kisskb

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Status:	OK
Date/Time:	Oct 19 2018, 04:57
Duration:	0:08:47.792445
Builder:	ka3
Revision:	fscache: Fix out of bound read in long cookie keys (`fa520c47eaa15b9baa8ad66ac18da4a31679693b)`
Target:	linus-rand/arm64-randconfig/arm64-gcc8
Branch:	linus-rand
Compiler:	arm64-gcc8 (aarch64-linux-gcc (GCC) 8.1.0)
Config:	randconfig (download)
Log:	Download original Possible warnings (6) scripts/unifdef.c:453:28: warning: 'strncpy' output truncated before terminating nul copying 4 bytes from a string of the same length [-Wstringop-truncation] lib/ubsan.c:432:1: warning: ignoring attribute 'noreturn' in declaration of a built-in function '__ubsan_handle_builtin_unreachable' because it conflicts with attribute 'const' [-Wattributes] lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null expected [-Wnonnull] lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null expected [-Wnonnull] lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] Full Log # git rev-parse -q --verify fa520c47eaa15b9baa8ad66ac18da4a31679693b^{commit} fa520c47eaa15b9baa8ad66ac18da4a31679693b already have revision, skipping fetch # git checkout -q -f -B kisskb fa520c47eaa15b9baa8ad66ac18da4a31679693b # git clean -qxdf # < git log -1 # commit fa520c47eaa15b9baa8ad66ac18da4a31679693b # Author: Eric Sandeen <sandeen@redhat.com> # Date: Wed Oct 17 15:23:59 2018 +0100 # # fscache: Fix out of bound read in long cookie keys # # fscache_set_key() can incur an out-of-bounds read, reported by KASAN: # # BUG: KASAN: slab-out-of-bounds in fscache_alloc_cookie+0x5b3/0x680 [fscache] # Read of size 4 at addr ffff88084ff056d4 by task mount.nfs/32615 # # and also reported by syzbot at https://lkml.org/lkml/2018/7/8/236 # # BUG: KASAN: slab-out-of-bounds in fscache_set_key fs/fscache/cookie.c:120 [inline] # BUG: KASAN: slab-out-of-bounds in fscache_alloc_cookie+0x7a9/0x880 fs/fscache/cookie.c:171 # Read of size 4 at addr ffff8801d3cc8bb4 by task syz-executor907/4466 # # This happens for any index_key_len which is not divisible by 4 and is # larger than the size of the inline key, because the code allocates exactly # index_key_len for the key buffer, but the hashing loop is stepping through # it 4 bytes (u32) at a time in the buf[] array. # # Fix this by calculating how many u32 buffers we'll need by using # DIV_ROUND_UP, and then using kcalloc() to allocate a precleared allocation # buffer to hold the index_key, then using that same count as the hashing # index limit. # # Fixes: ec0328e46d6e ("fscache: Maintain a catalogue of allocated cookies") # Reported-by: syzbot+a95b989b2dde8e806af8@syzkaller.appspotmail.com # Signed-off-by: Eric Sandeen <sandeen@redhat.com> # Cc: stable <stable@vger.kernel.org> # Signed-off-by: David Howells <dhowells@redhat.com> # Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version # < git log --format=%s --max-count=1 fa520c47eaa15b9baa8ad66ac18da4a31679693b # < make -s -j 80 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux- randconfig KCONFIG_SEED=0x9D5041F8 # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # yes \n \| make -s -j 80 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux- oldconfig yes: standard output: Broken pipe # make -s -j 80 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux- /kisskb/src/scripts/unifdef.c: In function 'Mpass': /kisskb/src/scripts/unifdef.c:453:28: warning: 'strncpy' output truncated before terminating nul copying 4 bytes from a string of the same length [-Wstringop-truncation] static void Mpass (void) { strncpy(keyword, "if ", 4); Pelif(); } ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/lib/ubsan.c:432:1: warning: ignoring attribute 'noreturn' in declaration of a built-in function '__ubsan_handle_builtin_unreachable' because it conflicts with attribute 'const' [-Wattributes] { ^ <built-in>: note: previous declaration here In function 'ZSTD_copyRawBlock', inlined from 'ZSTD_decompressContinue' at /kisskb/src/lib/zstd/decompress.c:1811:24, inlined from 'ZSTD_decompressStream' at /kisskb/src/lib/zstd/decompress.c:2353:5: /kisskb/src/lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null expected [-Wnonnull] memcpy(dst, src, srcSize); ^~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /kisskb/src/include/linux/string.h:20, from /kisskb/src/lib/zstd/mem.h:24, from /kisskb/src/lib/zstd/bitstream.h:54, from /kisskb/src/lib/zstd/fse.h:228, from /kisskb/src/lib/zstd/decompress.c:32: /kisskb/src/lib/zstd/decompress.c: In function 'ZSTD_decompressStream': /kisskb/src/arch/arm64/include/asm/string.h:38:14: note: in a call to function 'memcpy' declared here extern void memcpy(void , const void , __kernel_size_t); ^~~~~~ In function 'ZSTD_setRleBlock', inlined from 'ZSTD_decompressContinue' at /kisskb/src/lib/zstd/decompress.c:1812:24, inlined from 'ZSTD_decompressStream' at /kisskb/src/lib/zstd/decompress.c:2353:5: /kisskb/src/lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] memset(dst, (const BYTE )src, regenSize); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /kisskb/src/include/linux/string.h:20, from /kisskb/src/lib/zstd/mem.h:24, from /kisskb/src/lib/zstd/bitstream.h:54, from /kisskb/src/lib/zstd/fse.h:228, from /kisskb/src/lib/zstd/decompress.c:32: /kisskb/src/lib/zstd/decompress.c: In function 'ZSTD_decompressStream': /kisskb/src/arch/arm64/include/asm/string.h:49:14: note: in a call to function 'memset' declared here extern void memset(void , int, __kernel_size_t); ^~~~~~ In function 'ZSTD_copyRawBlock', inlined from 'ZSTD_decompressContinue' at /kisskb/src/lib/zstd/decompress.c:1811:24, inlined from 'ZSTD_decompressStream' at /kisskb/src/lib/zstd/decompress.c:2356:6: /kisskb/src/lib/zstd/decompress.c:416:2: warning: argument 1 null where non-null expected [-Wnonnull] memcpy(dst, src, srcSize); ^~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /kisskb/src/include/linux/string.h:20, from /kisskb/src/lib/zstd/mem.h:24, from /kisskb/src/lib/zstd/bitstream.h:54, from /kisskb/src/lib/zstd/fse.h:228, from /kisskb/src/lib/zstd/decompress.c:32: /kisskb/src/lib/zstd/decompress.c: In function 'ZSTD_decompressStream': /kisskb/src/arch/arm64/include/asm/string.h:38:14: note: in a call to function 'memcpy' declared here extern void memcpy(void , const void , __kernel_size_t); ^~~~~~ In function 'ZSTD_setRleBlock', inlined from 'ZSTD_decompressContinue' at /kisskb/src/lib/zstd/decompress.c:1812:24, inlined from 'ZSTD_decompressStream' at /kisskb/src/lib/zstd/decompress.c:2356:6: /kisskb/src/lib/zstd/decompress.c:426:2: warning: argument 1 null where non-null expected [-Wnonnull] memset(dst, (const BYTE )src, regenSize); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /kisskb/src/include/linux/string.h:20, from /kisskb/src/lib/zstd/mem.h:24, from /kisskb/src/lib/zstd/bitstream.h:54, from /kisskb/src/lib/zstd/fse.h:228, from /kisskb/src/lib/zstd/decompress.c:32: /kisskb/src/lib/zstd/decompress.c: In function 'ZSTD_decompressStream': /kisskb/src/arch/arm64/include/asm/string.h:49:14: note: in a call to function 'memset' declared here extern void memset(void , int, __kernel_size_t); ^~~~~~ Completed OK # rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 # Build took: 0:08:47.792445

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