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| author | Nick Terrell <terrelln@fb.com> | 2023-10-12 12:55:34 -0700 |
|---|---|---|
| committer | Nick Terrell <terrelln@meta.com> | 2023-11-14 17:12:52 -0800 |
| commit | 77618db346455129424fadbbaec596a09feaf3bb (patch) | |
| tree | 90a0583d90c88694f7198a73fd79d585d8213eae /lib/zstd | |
| parent | ffc253263a1375a65fa6c9f62a893e9767fbebfa (diff) | |
| download | linux-77618db346455129424fadbbaec596a09feaf3bb.tar.gz linux-77618db346455129424fadbbaec596a09feaf3bb.tar.bz2 linux-77618db346455129424fadbbaec596a09feaf3bb.zip | |
zstd: Fix array-index-out-of-bounds UBSAN warning
Zstd used an array of length 1 to mean a flexible array for C89
compatibility. Switch to a C99 flexible array to fix the UBSAN warning.
Tested locally by booting the kernel and writing to and reading from a
BtrFS filesystem with zstd compression enabled. I was unable to reproduce
the issue before the fix, however it is a trivial change.
Link: https://lkml.kernel.org/r/20231012213428.1390905-1-nickrterrell@gmail.com
Reported-by: syzbot+1f2eb3e8cd123ffce499@syzkaller.appspotmail.com
Reported-by: Eric Biggers <ebiggers@kernel.org>
Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nick Terrell <terrelln@fb.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'lib/zstd')
| -rw-r--r-- | lib/zstd/common/fse_decompress.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/zstd/common/fse_decompress.c b/lib/zstd/common/fse_decompress.c index a0d06095be83..8dcb8ca39767 100644 --- a/lib/zstd/common/fse_decompress.c +++ b/lib/zstd/common/fse_decompress.c @@ -312,7 +312,7 @@ size_t FSE_decompress_wksp(void* dst, size_t dstCapacity, const void* cSrc, size typedef struct { short ncount[FSE_MAX_SYMBOL_VALUE + 1]; - FSE_DTable dtable[1]; /* Dynamically sized */ + FSE_DTable dtable[]; /* Dynamically sized */ } FSE_DecompressWksp; |