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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-11 18:18:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-11 18:18:50 -0700 |
| commit | b1a62749946ee1956a480ba31e7d4929aa561d30 (patch) | |
| tree | acf6ff59b76d424a7aad9c9b5a81455e00ccc19d /lib | |
| parent | b961f8dc8976c091180839f4483d67b7c2ca2578 (diff) | |
| parent | 8449d150e66c43fd9bfd77691a56327dfdccedd7 (diff) | |
Merge branch 'akpm' (patches from Andrew)
Pull updates from Andrew Morton:
"A few fixes and stragglers.
Subsystems affected by this patch series: mm/memory-failure, ocfs2,
lib/lzo, misc"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
amdgpu: a NULL ->mm does not mean a thread is a kthread
lib/lzo: fix ambiguous encoding bug in lzo-rle
ocfs2: fix build failure when TCP/IP is disabled
mm/memory-failure: send SIGBUS(BUS_MCEERR_AR) only to current thread
mm/memory-failure: prioritize prctl(PR_MCE_KILL) over vm.memory_failure_early_kill
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/lzo/lzo1x_compress.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/lzo/lzo1x_compress.c b/lib/lzo/lzo1x_compress.c index 717c940112f9..8ad5ba2b86e2 100644 --- a/lib/lzo/lzo1x_compress.c +++ b/lib/lzo/lzo1x_compress.c @@ -268,6 +268,19 @@ m_len_done: *op++ = (M4_MARKER | ((m_off >> 11) & 8) | (m_len - 2)); else { + if (unlikely(((m_off & 0x403f) == 0x403f) + && (m_len >= 261) + && (m_len <= 264)) + && likely(bitstream_version)) { + // Under lzo-rle, block copies + // for 261 <= length <= 264 and + // (distance & 0x80f3) == 0x80f3 + // can result in ambiguous + // output. Adjust length + // to 260 to prevent ambiguity. + ip -= m_len - 260; + m_len = 260; + } m_len -= M4_MAX_LEN; *op++ = (M4_MARKER | ((m_off >> 11) & 8)); while (unlikely(m_len > 255)) { |