Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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10.1(EOL), 10.2(EOL)
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None
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10.2.12, 10.1.31, 10.3.6-1
Description
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10.2 615b1f418944 |
2017-06-15 20:59:59 140495015678016 [Note] InnoDB: Starting crash recovery from checkpoint LSN=8964539
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2017-06-15 20:59:59 140495015678016 [ERROR] InnoDB: Corruption: Page is marked as compressed space: 32 name: test/t044 but uncompress failed with error: -3 size: 199 len: 16384 compression method: ZLIB.
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2017-06-15 20:59:59 140495015678016 [Note] InnoDB: Page dump in ascii and hex (16384 bytes):
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len 16384; hex 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asc a / 9 [*j ] i { < >' #G o rd riZ \ o n / ; p d , < g ujJ + r#qp 4 0%% Q &$ + ypJ R q_ ]K 9{ =mv ( GKI : C~fr |W p | o jM E cp'"h 4 E q 6J Ik @| ~ ;
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InnoDB: End of page dump
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2017-06-15 20:59:59 140495015678016 [Note] InnoDB: Uncompressed page, stored checksum in field1 3735928559, calculated checksums for field1: crc32 1628319740/3887109642, innodb 612830638, page type 37401 == PAGE_COMPRESSED_ENRYPTED.none 3735928559, stored checksum in field2 0, calculated checksums for field2: crc32 1628319740/3887109642, innodb 2087871921, none 3735928559, page LSN 0 8901506, low 4 bytes of LSN at page end 0, page number (if stored to page already) 4, space id (if created with >= MySQL-4.1.1 and stored already) 32
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mysqld: /data/src/10.2/storage/innobase/buf/buf0buf.cc:1356: void buf_page_print(const byte*, const page_size_t&, ulint): Assertion `flags & BUF_PAGE_PRINT_NO_CRASH' failed.
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170615 20:59:59 [ERROR] mysqld got signal 6 ;
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#7 0x00007fc7894aaee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
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#8 0x0000557e1b215626 in buf_page_print (read_buf=0x557e1e664000 "Ţ\276", <incomplete sequence \357>, page_size=..., flags=0) at /data/src/10.2/storage/innobase/buf/buf0buf.cc:1356
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#9 0x0000557e1b2b6917 in fil_decompress_page (page_buf=0x0, buf=0x557e1e664000 "Ţ\276", <incomplete sequence \357>, len=16384, write_size=0x0, return_error=true) at /data/src/10.2/storage/innobase/fil/fil0pagecompress.cc:651
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#10 0x0000557e1b22d3cc in buf_dblwr_process () at /data/src/10.2/storage/innobase/buf/buf0dblwr.cc:616
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#11 0x0000557e1b048a8c in recv_init_crash_recovery_spaces () at /data/src/10.2/storage/innobase/log/log0recv.cc:3103
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#12 0x0000557e1b049381 in recv_recovery_from_checkpoint_start (flush_lsn=1656445) at /data/src/10.2/storage/innobase/log/log0recv.cc:3279
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#13 0x0000557e1b15f6d1 in innobase_start_or_create_for_mysql () at /data/src/10.2/storage/innobase/srv/srv0start.cc:2215
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#14 0x0000557e1afa0315 in innobase_init (p=0x557e1d782bc0) at /data/src/10.2/storage/innobase/handler/ha_innodb.cc:4478
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#15 0x0000557e1ac96dd3 in ha_initialize_handlerton (plugin=0x557e1d697de0) at /data/src/10.2/sql/handler.cc:512
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#16 0x0000557e1aa41c0e in plugin_initialize (tmp_root=0x7fff7581b950, plugin=0x557e1d697de0, argc=0x557e1bf6a6b0 <remaining_argc>, argv=0x557e1d6433c8, options_only=false) at /data/src/10.2/sql/sql_plugin.cc:1407
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#17 0x0000557e1aa42817 in plugin_init (argc=0x557e1bf6a6b0 <remaining_argc>, argv=0x557e1d6433c8, flags=2) at /data/src/10.2/sql/sql_plugin.cc:1689
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#18 0x0000557e1a94fa35 in init_server_components () at /data/src/10.2/sql/mysqld.cc:5253
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#19 0x0000557e1a950aba in mysqld_main (argc=19, argv=0x557e1d6433c8) at /data/src/10.2/sql/mysqld.cc:5843
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#20 0x0000557e1a9459e0 in main (argc=19, argv=0x7fff7581c6e8) at /data/src/10.2/sql/main.cc:25
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To reproduce (set your basedir instead of <basedir>) |
git clone https://github.com/elenst/rqg --branch mdev13103 rqg-mdev13103
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cd rqg-mdev13103
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BASEDIR=<basedir> . ./mdev13103.cmd
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The test starts the server from basedir with encryption options as below, creates one table and runs simple INSERT as shown in mdev13103.yy. After 30 seconds it SIGKILLs the server and restarts it with the same options.
--file-key-management
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--plugin-load-add=file_key_management.so
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--innodb-encrypt-tables
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--file-key-management-filename=$BASEDIR/mysql-test/std_data/keys.txt
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Attachments
Issue Links
- is duplicated by
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- Closed
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- relates to
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- Closed
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- Closed
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- Closed
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Activity
I cleaned up the compression and decompression code, but did not change the page format.
I hope that elenst’s upgrade tests will turn out fine.
bb-10.1-marko
bb-10.2-marko
This work includes a user-visible change: server error log output related to compression failures will be removed. The counter compress_pages_page_compression_error can be used to monitor compression failures, and ls -ls or similar commands may be used to check the logical and physical sizes of the .ibd files.
This fix will replace the unsafe decompression variants of LZO and LZ4 with safe ones. I wrote a microbenchmark to check how much this actually costs for LZO:
#include <stdio.h>
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#include <time.h>
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#include <assert.h>
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#include <lzo/lzo1x.h>
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static long nsdiff(const struct timespec*a, const struct timespec*b) |
{
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return 1000000000L * (a->tv_sec - b->tv_sec) + (a->tv_nsec - b->tv_nsec); |
}
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int main (int argc, char**argv) |
{
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char buf[16384],zbuf[sizeof buf + LZO1X_1_15_MEM_COMPRESS]; |
lzo_uint i, len, zlen;
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const lzo_uint n = 10000000; |
struct timespec t[3]; |
for (i=0; i < sizeof buf; i++) buf[i] = i; |
len = sizeof zbuf; |
assert(LZO_E_OK == lzo1x_1_15_compress(buf, sizeof buf, zbuf, &len, |
zbuf + sizeof buf)); |
assert(len < sizeof buf); |
zlen = len;
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clock_gettime(CLOCK_THREAD_CPUTIME_ID, &t[0]);
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for (i=n; i--; ) { |
len = sizeof buf; |
assert(LZO_E_OK == lzo1x_decompress_safe(zbuf, zlen, buf, &len, NULL)); |
assert(len == sizeof buf); |
}
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clock_gettime(CLOCK_THREAD_CPUTIME_ID, &t[1]);
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for (i=n; i--; ) { |
len = sizeof buf; |
assert(LZO_E_OK == lzo1x_decompress(zbuf, zlen, buf, &len, NULL)); |
assert(len == sizeof buf); |
}
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clock_gettime(CLOCK_THREAD_CPUTIME_ID, &t[2]);
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printf("safe: %luns; unsafe: %luns\n", |
nsdiff(&t[1], &t[0]), nsdiff(&t[2], &t[1]));
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return 0; |
}
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On Intel Xeon E5-2630 v4, the difference is very small for LZO, and I would expect it to be similar for LZ4:
safe: 9570081571ns; unsafe: 9555789202ns
That is, the safe decompressor is 0.15% slower than the one that lacks input validation.
It is of course possible that this microbenchmark was ruined by some successful branch prediction caching, but I would not be worried about the speed. With n=1 the results vary a lot, but the typical difference is not really that much:
safe: 6166ns; unsafe: 4641ns
The worst case appears to be about 1.5µs per page. I would not care about it.
There has been some doubt whether MariaDB Server 10.1 is actually affected by this bug. I tested with a modified test:
diff --git a/mysql-test/suite/innodb/t/doublewrite.test b/mysql-test/suite/innodb/t/doublewrite.test
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index aba3d6ecff5..277f72f50e6 100644
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--- a/mysql-test/suite/innodb/t/doublewrite.test
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+++ b/mysql-test/suite/innodb/t/doublewrite.test
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@@ -31,7 +31,9 @@ show variables like 'innodb_doublewrite';
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show variables like 'innodb_fil_make_page_dirty_debug';
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show variables like 'innodb_saved_page_number_debug';
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-create table t1 (f1 int primary key, f2 blob) engine=innodb;
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+set global innodb_file_format=barracuda;
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+create table t1 (f1 int primary key, f2 blob) engine=innodb
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+page_compressed=1 page_compression_level=2;
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start transaction;
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insert into t1 values(1, repeat('#',12)); |
Indeed, this test will not fail in MariaDB 10.1 even before this fix, but it would in 10.2 (even with the fix, using 32k and 64k page sizes; the logic to guess the page size does not take page compression into account).
Maybe the InnoDB I/O layer is different enough between 10.1 and 10.2, making the doublewrite buffer appear to be immune to this? In both versions, buf_flush_write_block_low() appears to be compressing the page before writing to the doublewrite buffer or to the data file.
There are multiple places in the code where InnoDB fails to deal with corrupted page_compressed pages, not only the doublewrite buffer and IMPORT TABLESPACE, but also after decrypting. In addition to this, the decompression was invoking "fast" instead of "safe" variants of LZ4 and LZO.
I have an almost working fix that does not change the compressed page format. A few encryption tests fail.