Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL)
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None
Description
The bug can be seen f.ex in innodb.innodb when ASAN instrumentation is enabled.
==10478==ERROR: AddressSanitizer: use-after-poison on address 0x7f8cb02dedf8 at pc 0x0000015fbc6b bp 0x7f8cb02de210 sp 0x7f8cb02de208
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READ of size 4 at 0x7f8cb02dedf8 thread T22
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#0 0x15fbc6a in _db_return_ /work/mariadb/dbug/dbug.c:1166:18
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#1 0x15b5909 in my_free /work/mariadb/mysys/my_malloc.c:218:3
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#2 0x1171344 in pfs_spawn_thread /work/mariadb/storage/perfschema/pfs.cc:1858:3
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#3 0x7f8cc6bf6163 in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x8163)
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#4 0x7f8cc5e50dee in clone /build/glibc-B9XfQf/glibc-2.28/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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Address 0x7f8cb02dedf8 is a wild pointer.
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SUMMARY: AddressSanitizer: use-after-poison /work/mariadb/dbug/dbug.c:1166:18 in _db_return_
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Shadow bytes around the buggy address:
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0x0ff216053d60: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053d70: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053d80: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053d90: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053da0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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=>0x0ff216053db0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7[f7]
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0x0ff216053dc0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053dd0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053de0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053df0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff216053e00: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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Shadow byte legend (one shadow byte represents 8 application bytes):
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Addressable: 00
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Partially addressable: 01 02 03 04 05 06 07
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Heap left redzone: fa
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Freed heap region: fd
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Stack left redzone: f1
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Stack mid redzone: f2
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Stack right redzone: f3
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Stack after return: f5
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Stack use after scope: f8
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Global redzone: f9
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Global init order: f6
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Poisoned by user: f7
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Container overflow: fc
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Array cookie: ac
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Intra object redzone: bb
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ASan internal: fe
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Left alloca redzone: ca
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Right alloca redzone: cb
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Shadow gap: cc
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Thread T22 created by T0 here:
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#0 0x5afb40 in pthread_create /home/kevg/fun/cpp_projects/llvm_toolchain/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:210:3
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#1 0x11741e8 in spawn_thread_v1(unsigned int, unsigned long*, pthread_attr_t const*, void* (*)(void*), void*) /work/mariadb/storage/perfschema/pfs.cc:1911:15
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#2 0x6a6240 in create_thread_to_handle_connection(THD*) /work/mariadb/sql/mysqld.cc:5925:15
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#3 0x6a730a in create_new_thread(THD*) /work/mariadb/sql/mysqld.cc:6018:3
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#4 0x6a5c1f in handle_connections_sockets() /work/mariadb/sql/mysqld.cc:6302:5
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#5 0x6a0398 in mysqld_main(int, char**) /work/mariadb/sql/mysqld.cc:5531:3
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#6 0x7f8cc5d5a09a in __libc_start_main /build/glibc-B9XfQf/glibc-2.28/csu/../csu/libc-start.c:308:16
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==10478==ABORTING
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It's impossible to understand what happened here. errno was poisoned, eh?