[MDEV-35621] UBSAN: runtime error: applying zero offset to null pointer in my_strnxfrm_utf8mb3_general_ci, my_uca_scanner_init_any and my_uca_scanner_next_utf8mb3 and in _utf8mb4 functions, and null pointer passed as argument 2, which is declared to never be null - Jira

Details

Type: Bug
Status: Confirmed (View Workflow)
Priority: Major
Resolution: Unresolved
Affects Version/s: 10.5, 10.6, 10.11, 11.4, 11.7(EOL), 11.8, 12.0
Fix Version/s: 10.5, 10.6, 10.11, 11.4, 11.8
Component/s: Character Sets
Labels:

Description

SET NAMES utf8;

DO CHAR((WEIGHT_STRING (EXTRACTVALUE ((0),('t')) LEVEL 7)) USING cp852);

Leads to:

CS 10.5.28 142851f1205d98270b917a98e1bdd483e1b8af0e (Debug, UBASAN, Clang)
/test/10.5_dbg_san/strings/strcoll.inl:472:54: runtime error: applying zero offset to null pointer
SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.5_dbg_san/strings/strcoll.inl:472:54
#0 0x557849078606 in my_strnxfrm_utf8mb3_general_ci /test/10.5_dbg_san/strings/strcoll.inl:472:54
#1 0x557845805bb9 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/10.5_dbg_san/include/m_ctype.h:871:12
#2 0x557845805590 in Item_func_weight_string::val_str(String*) /test/10.5_dbg_san/sql/item_strfunc.cc:3732:19
#3 0x557845778d61 in Item_str_func::val_int() /test/10.5_dbg_san/sql/item_strfunc.cc:154:16
#4 0x5578457e570f in Item_func_char::val_str(String*) /test/10.5_dbg_san/sql/item_strfunc.cc:2986:32
#5 0x557844428c22 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.5_dbg_san/sql/sql_type.cc:4286:16
#6 0x5578424766d4 in Item::update_null_value() /test/10.5_dbg_san/sql/item.h:1911:28
#7 0x557842b4d646 in Item_func::is_null() /test/10.5_dbg_san/sql/item_func.h:222:5
#8 0x5578462db011 in mysql_do(THD*, List<Item>&) /test/10.5_dbg_san/sql/sql_do.cc:35:19
#9 0x557842f389c8 in mysql_execute_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:4058:10
#10 0x557842edf4e3 in mysql_parse(THD, char, unsigned int, Parser_state*, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:8237:18
#11 0x557842ebf453 in dispatch_command(enum_server_command, THD, char, unsigned int, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:1891:7
#12 0x557842ee7a19 in do_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:1375:17
#13 0x557843e61f30 in do_handle_one_connection(CONNECT*, bool) /test/10.5_dbg_san/sql/sql_connect.cc:1386:11
#14 0x557843e606fd in handle_one_connection /test/10.5_dbg_san/sql/sql_connect.cc:1298:5
#15 0x55784235ba8c in asan_thread_start(void*) asan_interceptors.cpp.o
#16 0x154b2ca9ca93 in start_thread nptl/pthread_create.c:447:8
#17 0x154b2cb29c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.5_dbg_san/strings/strcoll.inl:472:54

In 11.7 the stack changes:

CS 11.7.1 33907f9ec6b969528d0f3f99873c3b4d64c98b5a (Debug, UBASAN, Clang)
/test/11.7_dbg_san/strings/ctype-uca.c:32090:22: runtime error: applying zero offset to null pointer
#0 0x5605e65733ce in my_uca_scanner_init_any /test/11.7_dbg_san/strings/ctype-uca.c:32090:22
#1 0x5605e658ba96 in my_uca_strnxfrm_onelevel_internal_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:801:3
#2 0x5605e658b3db in my_uca_strnxfrm_onelevel_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:834:25
#3 0x5605e65409e0 in my_uca_strnxfrm_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:898:7
#4 0x5605e2f666c6 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/11.7_dbg_san/include/m_ctype.h:1119:12
#5 0x5605e2f66007 in Item_func_weight_string::val_str(String*) /test/11.7_dbg_san/sql/item_strfunc.cc:4201:19
#6 0x5605e2eca524 in Item_str_func::val_int() /test/11.7_dbg_san/sql/item_strfunc.cc:169:16
#7 0x5605e2f4559b in Item_func_char::val_str(String*) /test/11.7_dbg_san/sql/item_strfunc.cc:3405:32
#8 0x5605e1ad1f02 in Type_handler_string_result::Item_update_null_value(Item*) const /test/11.7_dbg_san/sql/sql_type.cc:4345:16
#9 0x5605df4308d4 in Item::update_null_value() /test/11.7_dbg_san/sql/item.h:2152:28
#10 0x5605df5edad6 in Item_func::is_null() /test/11.7_dbg_san/sql/item_func.h:243:5
#11 0x5605e38d6a99 in mysql_do(THD*, List<Item>&) /test/11.7_dbg_san/sql/sql_do.cc:36:19
#12 0x5605e02301c5 in mysql_execute_command(THD*, bool) /test/11.7_dbg_san/sql/sql_parse.cc:3995:10
#13 0x5605e01d5ec9 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.7_dbg_san/sql/sql_parse.cc:7901:18
#14 0x5605e01b6d88 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.7_dbg_san/sql/sql_parse.cc:1903:7
#15 0x5605e01dfe26 in do_command(THD*, bool) /test/11.7_dbg_san/sql/sql_parse.cc:1416:17
#16 0x5605e1341db6 in do_handle_one_connection(CONNECT*, bool) /test/11.7_dbg_san/sql/sql_connect.cc:1415:11
#17 0x5605e1340579 in handle_one_connection /test/11.7_dbg_san/sql/sql_connect.cc:1327:5
#18 0x5605df3895cc in asan_thread_start(void*) asan_interceptors.cpp.o
#19 0x14901769ca93 in start_thread nptl/pthread_create.c:447:8
#20 0x149017729c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/11.7_dbg_san/strings/ctype-uca.c:32090:22
/test/11.7_dbg_san/strings/ctype-uca-scanner_next.inl:84:23: runtime error: applying non-zero offset 1 to null pointer
#0 0x5605e6583f1c in my_uca_scanner_next_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca-scanner_next.inl:84:23
#1 0x5605e658baa9 in my_uca_strnxfrm_onelevel_internal_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:803:18
#2 0x5605e658b3db in my_uca_strnxfrm_onelevel_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:834:25
#3 0x5605e65409e0 in my_uca_strnxfrm_utf8mb3 /test/11.7_dbg_san/strings/ctype-uca.inl:898:7
#4 0x5605e2f666c6 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/11.7_dbg_san/include/m_ctype.h:1119:12
#5 0x5605e2f66007 in Item_func_weight_string::val_str(String*) /test/11.7_dbg_san/sql/item_strfunc.cc:4201:19
#6 0x5605e2eca524 in Item_str_func::val_int() /test/11.7_dbg_san/sql/item_strfunc.cc:169:16
#7 0x5605e2f4559b in Item_func_char::val_str(String*) /test/11.7_dbg_san/sql/item_strfunc.cc:3405:32
#8 0x5605e1ad1f02 in Type_handler_string_result::Item_update_null_value(Item*) const /test/11.7_dbg_san/sql/sql_type.cc:4345:16
#9 0x5605df4308d4 in Item::update_null_value() /test/11.7_dbg_san/sql/item.h:2152:28
#10 0x5605df5edad6 in Item_func::is_null() /test/11.7_dbg_san/sql/item_func.h:243:5
#11 0x5605e38d6a99 in mysql_do(THD*, List<Item>&) /test/11.7_dbg_san/sql/sql_do.cc:36:19
#12 0x5605e02301c5 in mysql_execute_command(THD*, bool) /test/11.7_dbg_san/sql/sql_parse.cc:3995:10
#13 0x5605e01d5ec9 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.7_dbg_san/sql/sql_parse.cc:7901:18
#14 0x5605e01b6d88 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.7_dbg_san/sql/sql_parse.cc:1903:7
#15 0x5605e01dfe26 in do_command(THD*, bool) /test/11.7_dbg_san/sql/sql_parse.cc:1416:17
#16 0x5605e1341db6 in do_handle_one_connection(CONNECT*, bool) /test/11.7_dbg_san/sql/sql_connect.cc:1415:11
#17 0x5605e1340579 in handle_one_connection /test/11.7_dbg_san/sql/sql_connect.cc:1327:5
#18 0x5605df3895cc in asan_thread_start(void*) asan_interceptors.cpp.o
#19 0x14901769ca93 in start_thread nptl/pthread_create.c:447:8
#20 0x149017729c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-nonzero-offset /test/11.7_dbg_san/strings/ctype-uca-scanner_next.inl:84:23

Setup:

Compiled with a recent version of Clang (I used Clang 18.1.3) with LLVM 18:

     # Note: llvm-17-linker-tools installs /usr/lib/llvm-17/lib/LLVMgold.so, which is needed for compilation, and LLVMgold.so is no longer included in LLVM 18

     sudo apt install clang llvm-18 llvm-18-linker-tools llvm-18-runtime llvm-18-tools llvm-18-dev libstdc++-14-dev llvm-dev llvm-17-linker-tools

     sudo ln -s /usr/lib/llvm-17/lib/LLVMgold.so /usr/lib/llvm-18/lib/LLVMgold.so

Compiled with: '-DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++' and:

    -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWSREP_LIB_WITH_ASAN=ON

Set before execution:

    export UBSAN_OPTIONS=print_stacktrace=1:report_error_type=1   # And you may also want to supress UBSAN startup issues using 'suppressions=UBSAN.filter'. For an example of UBSAN.filter, which includes current startup issues see: https://github.com/mariadb-corporation/mariadb-qa/blob/master/UBSAN.filter

Bug confirmed present in:
MariaDB: 10.5.28 (dbg), 10.5.28 (opt), 10.6.21 (dbg), 10.6.21 (opt), 10.11.11 (dbg), 10.11.11 (opt), 11.4.5 (dbg), 11.4.5 (opt), 11.7.1 (dbg), 11.7.1 (opt), 11.8.0 (dbg), 11.8.0 (opt)

Attachments

Issue Links

relates to

MDEV-35712 UBSAN: runtime error: applying zero offset to null pointer in my_uca_contraction_find on SET SESSION collation_connection

Open

MDEV-35864 UBSAN: "applying zero offset to null pointer" when using a Field_set with empty values

Closed

MDEV-36565 Assertion `src != ((void *)0)' failed in my_casedn_8bit

Closed

MDEV-18770 AddressSanitizer: memcpy-param-overlap in my_strnxfrm_8bit_bin

Open

MDEV-27164 UBSAN: runtime error: null pointer passed as argument 2, which is declared to never be null in my_strnxfrm_tis620

Confirmed

MDEV-35723 UBSAN: applying non-zero offset to null pointer in my_charpos_mb/my_uca_scanner_next_utf8mb4, applying zero offset to null pointer in my_strnncollsp_simple, my_uca_strnncollsp_onelevel_utf8mb4/my_uca_scanner_init_any/my_uca_scanner_next_utf8mb4 on INSERT

Closed

(1 relates to)

Activity

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View 8 older comments

Roel Van de Paar added a comment - 2025-02-09 23:33

DO WEIGHT_STRING (EXTRACTVALUE ('','/*/a') LEVEL 1 REVERSE);

CS 10.5.29 3a1f9dfda98fd1b6bc577918267ee42b7e1469aa (Debug, UBASAN, Clang) Build 06/02/2025
/test/10.5_dbg_san/strings/strcoll.inl:474:54: runtime error: applying zero offset to null pointer
#0 0x55f0d0dd8a3d in my_strnxfrm_utf8mb3_general_ci /test/10.5_dbg_san/strings/strcoll.inl:474:54
#1 0x55f0cf585e77 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/10.5_dbg_san/include/m_ctype.h:871:12
#2 0x55f0cf585e77 in Item_func_weight_string::val_str(String*) /test/10.5_dbg_san/sql/item_strfunc.cc:3732:19
#3 0x55f0ced453d7 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.5_dbg_san/sql/sql_type.cc:4286:16
#4 0x55f0ce48b725 in Item_func::is_null() /test/10.5_dbg_san/sql/item_func.h:222:5
#5 0x55f0cfa63380 in mysql_do(THD*, List<Item>&) /test/10.5_dbg_san/sql/sql_do.cc:35:19
#6 0x55f0ce4e9b12 in mysql_execute_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:4072:10
#7 0x55f0ce4c2317 in mysql_parse(THD, char, unsigned int, Parser_state*, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:8252:18
#8 0x55f0ce4b6269 in dispatch_command(enum_server_command, THD, char, unsigned int, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:1891:7
#9 0x55f0ce4c446e in do_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:1375:17
#10 0x55f0ceace107 in do_handle_one_connection(CONNECT*, bool) /test/10.5_dbg_san/sql/sql_connect.cc:1386:11
#11 0x55f0ceacd9cb in handle_one_connection /test/10.5_dbg_san/sql/sql_connect.cc:1298:5
#12 0x55f0cdfd703c in asan_thread_start(void*) asan_interceptors.cpp.o
#13 0x14ca6f89ca93 in start_thread nptl/pthread_create.c:447:8
#14 0x14ca6f929c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.5_dbg_san/strings/strcoll.inl:474:54

Roel Van de Paar added a comment - 2025-02-09 23:33 DO WEIGHT_STRING (EXTRACTVALUE ( '' , '/*/a' ) LEVEL 1 REVERSE); CS 10.5.29 3a1f9dfda98fd1b6bc577918267ee42b7e1469aa (Debug, UBASAN, Clang) Build 06/02/2025 /test/10.5_dbg_san/strings/strcoll.inl:474:54: runtime error: applying zero offset to null pointer #0 0x55f0d0dd8a3d in my_strnxfrm_utf8mb3_general_ci /test/10.5_dbg_san/strings/strcoll.inl:474:54 #1 0x55f0cf585e77 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/10.5_dbg_san/include/m_ctype.h:871:12 #2 0x55f0cf585e77 in Item_func_weight_string::val_str(String*) /test/10.5_dbg_san/sql/item_strfunc.cc:3732:19 #3 0x55f0ced453d7 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.5_dbg_san/sql/sql_type.cc:4286:16 #4 0x55f0ce48b725 in Item_func::is_null() /test/10.5_dbg_san/sql/item_func.h:222:5 #5 0x55f0cfa63380 in mysql_do(THD*, List<Item>&) /test/10.5_dbg_san/sql/sql_do.cc:35:19 #6 0x55f0ce4e9b12 in mysql_execute_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:4072:10 #7 0x55f0ce4c2317 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:8252:18 #8 0x55f0ce4b6269 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /test/10.5_dbg_san/sql/sql_parse.cc:1891:7 #9 0x55f0ce4c446e in do_command(THD*) /test/10.5_dbg_san/sql/sql_parse.cc:1375:17 #10 0x55f0ceace107 in do_handle_one_connection(CONNECT*, bool) /test/10.5_dbg_san/sql/sql_connect.cc:1386:11 #11 0x55f0ceacd9cb in handle_one_connection /test/10.5_dbg_san/sql/sql_connect.cc:1298:5 #12 0x55f0cdfd703c in asan_thread_start(void*) asan_interceptors.cpp.o #13 0x14ca6f89ca93 in start_thread nptl/pthread_create.c:447:8 #14 0x14ca6f929c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.5_dbg_san/strings/strcoll.inl:474:54

Roel Van de Paar added a comment - 2025-02-10 00:03 - edited

SET NAMES gbk;

DO WEIGHT_STRING (EXTRACTVALUE (0,'a') LEVEL 1 REVERSE);

UBSAN|applying zero offset to null pointer|strings/strcoll.inl|my_strnxfrm_gbk_chinese_ci|charset_info_st::strnxfrm|Item_func_weight_string::val_str|Type_handler_string_result::Item_update_null_value

Also, when executing this with pquery instead of the CLI, we see another stack:

CS 10.5.29 3a1f9dfda98fd1b6bc577918267ee42b7e1469aa (Debug, UBASAN, Clang) Build 06/02/2025

UBSAN|applying zero offset to null pointer|strings/strcoll.inl|my_strnxfrm_utf8mb4_general_ci|charset_info_st::strnxfrm|Item_func_weight_string::val_str|Type_handler_string_result::Item_update_null_value

Roel Van de Paar added a comment - 2025-02-10 00:03 - edited SET NAMES gbk; DO WEIGHT_STRING (EXTRACTVALUE (0, 'a' ) LEVEL 1 REVERSE); UBSAN|applying zero offset to null pointer|strings/strcoll.inl|my_strnxfrm_gbk_chinese_ci|charset_info_st::strnxfrm|Item_func_weight_string::val_str|Type_handler_string_result::Item_update_null_value Also, when executing this with pquery instead of the CLI, we see another stack: CS 10.5.29 3a1f9dfda98fd1b6bc577918267ee42b7e1469aa (Debug, UBASAN, Clang) Build 06/02/2025 UBSAN|applying zero offset to null pointer|strings/strcoll.inl|my_strnxfrm_utf8mb4_general_ci|charset_info_st::strnxfrm|Item_func_weight_string::val_str|Type_handler_string_result::Item_update_null_value

Ramesh Sivaraman added a comment - 2025-02-24 07:40

Another UBSAN error in a different location, was reproduced only in 11.8+ builds

SET collation_connection=latin2_czech_cs;

DO WEIGHT_STRING (EXTRACTVALUE (0,'a') LEVEL 1 REVERSE);

Leads to

CS 11.8.1 6f1161aa34cbb178b00fc24cbc46e2e0e2af767a (Optimized, UBASAN, Clang) Build 24/02/2025
/test/11.8_opt_san/strings/ctype-czech.c:318:60: runtime error: applying zero offset to null pointer
#0 0x55edadadaf50 in my_strnxfrm_czech /test/11.8_opt_san/strings/ctype-czech.c:318:60
#1 0x55edac7707d3 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/11.8_opt_san/include/m_ctype.h:1119:12
#2 0x55edac7707d3 in Item_func_weight_string::val_str(String*) /test/11.8_opt_san/sql/item_strfunc.cc:4201:19
#3 0x55edabf4e623 in Type_handler_string_result::Item_update_null_value(Item*) const /test/11.8_opt_san/sql/sql_type.cc:4345:16
#4 0x55edab125b55 in Item_func::is_null() /test/11.8_opt_san/sql/item_func.h:245:5
#5 0x55edacb810f0 in mysql_do(THD*, List<Item>&) /test/11.8_opt_san/sql/sql_do.cc:36:19
#6 0x55edab5d5b74 in mysql_execute_command(THD*, bool) /test/11.8_opt_san/sql/sql_parse.cc:4008:10
#7 0x55edab5af5c0 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.8_opt_san/sql/sql_parse.cc:7915:18
#8 0x55edab5a6886 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.8_opt_san/sql/sql_parse.cc:1902:7
#9 0x55edab5b1886 in do_command(THD*, bool) /test/11.8_opt_san/sql/sql_parse.cc:1415:17
#10 0x55edabc37ffc in do_handle_one_connection(CONNECT*, bool) /test/11.8_opt_san/sql/sql_connect.cc:1415:11
#11 0x55edabc37856 in handle_one_connection /test/11.8_opt_san/sql/sql_connect.cc:1327:5
#12 0x55edaaff395c in asan_thread_start(void*) asan_interceptors.cpp.o
#13 0x15332f29caa3 in start_thread nptl/pthread_create.c:447:8
#14 0x15332f329c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/11.8_opt_san/strings/ctype-czech.c:318:60

Ramesh Sivaraman added a comment - 2025-02-24 07:40 Another UBSAN error in a different location, was reproduced only in 11.8+ builds SET collation_connection=latin2_czech_cs; DO WEIGHT_STRING (EXTRACTVALUE (0, 'a' ) LEVEL 1 REVERSE); Leads to CS 11.8.1 6f1161aa34cbb178b00fc24cbc46e2e0e2af767a (Optimized, UBASAN, Clang) Build 24/02/2025 /test/11.8_opt_san/strings/ctype-czech.c:318:60: runtime error: applying zero offset to null pointer #0 0x55edadadaf50 in my_strnxfrm_czech /test/11.8_opt_san/strings/ctype-czech.c:318:60 #1 0x55edac7707d3 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/11.8_opt_san/include/m_ctype.h:1119:12 #2 0x55edac7707d3 in Item_func_weight_string::val_str(String*) /test/11.8_opt_san/sql/item_strfunc.cc:4201:19 #3 0x55edabf4e623 in Type_handler_string_result::Item_update_null_value(Item*) const /test/11.8_opt_san/sql/sql_type.cc:4345:16 #4 0x55edab125b55 in Item_func::is_null() /test/11.8_opt_san/sql/item_func.h:245:5 #5 0x55edacb810f0 in mysql_do(THD*, List<Item>&) /test/11.8_opt_san/sql/sql_do.cc:36:19 #6 0x55edab5d5b74 in mysql_execute_command(THD*, bool) /test/11.8_opt_san/sql/sql_parse.cc:4008:10 #7 0x55edab5af5c0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.8_opt_san/sql/sql_parse.cc:7915:18 #8 0x55edab5a6886 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.8_opt_san/sql/sql_parse.cc:1902:7 #9 0x55edab5b1886 in do_command(THD*, bool) /test/11.8_opt_san/sql/sql_parse.cc:1415:17 #10 0x55edabc37ffc in do_handle_one_connection(CONNECT*, bool) /test/11.8_opt_san/sql/sql_connect.cc:1415:11 #11 0x55edabc37856 in handle_one_connection /test/11.8_opt_san/sql/sql_connect.cc:1327:5 #12 0x55edaaff395c in asan_thread_start(void*) asan_interceptors.cpp.o #13 0x15332f29caa3 in start_thread nptl/pthread_create.c:447:8 #14 0x15332f329c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/11.8_opt_san/strings/ctype-czech.c:318:60

Roel Van de Paar added a comment - 2025-04-16 14:48

SET NAMES 'latin1' COLLATE 'latin1_german2_ci';

DO WEIGHT_STRING (EXTRACTVALUE (0,'/*/a') LEVEL 1 REVERSE);

Leads to:

CS 10.11.12 43c5d1303f5c7c726db276815c459436110f342f (Optimized, UBASAN, Clang) Build 15/02/2025
/test/10.11_opt_san/strings/ctype-latin1.c:684:24: runtime error: applying zero offset to null pointer
#0 0x6156d02c73ec in my_strnxfrm_latin1_de /test/10.11_opt_san/strings/ctype-latin1.c:684:24
#1 0x6156cef48596 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/10.11_opt_san/include/m_ctype.h:1033:12
#2 0x6156cef48596 in Item_func_weight_string::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:4031:19
#3 0x6156ce762f33 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.11_opt_san/sql/sql_type.cc:4351:16
#4 0x6156cd9d4145 in Item_func::is_null() /test/10.11_opt_san/sql/item_func.h:248:5
#5 0x6156cf359580 in mysql_do(THD*, List<Item>&) /test/10.11_opt_san/sql/sql_do.cc:36:19
#6 0x6156cde8bed9 in mysql_execute_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:4041:10
#7 0x6156cde64dc0 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/10.11_opt_san/sql/sql_parse.cc:8188:18
#8 0x6156cde5c0fd in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/10.11_opt_san/sql/sql_parse.cc:1905:7
#9 0x6156cde67086 in do_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:1418:17
#10 0x6156ce4caa9c in do_handle_one_connection(CONNECT*, bool) /test/10.11_opt_san/sql/sql_connect.cc:1386:11
#11 0x6156ce4ca2ea in handle_one_connection /test/10.11_opt_san/sql/sql_connect.cc:1298:5
#12 0x6156cd8abdbc in asan_thread_start(void*) asan_interceptors.cpp.o
#13 0x796a8ec9ca93 in start_thread nptl/pthread_create.c:447:8
#14 0x796a8ed29c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.11_opt_san/strings/ctype-latin1.c:684:24

Roel Van de Paar added a comment - 2025-04-16 14:48 SET NAMES 'latin1' COLLATE 'latin1_german2_ci' ; DO WEIGHT_STRING (EXTRACTVALUE (0, '/*/a' ) LEVEL 1 REVERSE); Leads to: CS 10.11.12 43c5d1303f5c7c726db276815c459436110f342f (Optimized, UBASAN, Clang) Build 15/02/2025 /test/10.11_opt_san/strings/ctype-latin1.c:684:24: runtime error: applying zero offset to null pointer #0 0x6156d02c73ec in my_strnxfrm_latin1_de /test/10.11_opt_san/strings/ctype-latin1.c:684:24 #1 0x6156cef48596 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/10.11_opt_san/include/m_ctype.h:1033:12 #2 0x6156cef48596 in Item_func_weight_string::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:4031:19 #3 0x6156ce762f33 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.11_opt_san/sql/sql_type.cc:4351:16 #4 0x6156cd9d4145 in Item_func::is_null() /test/10.11_opt_san/sql/item_func.h:248:5 #5 0x6156cf359580 in mysql_do(THD*, List<Item>&) /test/10.11_opt_san/sql/sql_do.cc:36:19 #6 0x6156cde8bed9 in mysql_execute_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:4041:10 #7 0x6156cde64dc0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.11_opt_san/sql/sql_parse.cc:8188:18 #8 0x6156cde5c0fd in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.11_opt_san/sql/sql_parse.cc:1905:7 #9 0x6156cde67086 in do_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:1418:17 #10 0x6156ce4caa9c in do_handle_one_connection(CONNECT*, bool) /test/10.11_opt_san/sql/sql_connect.cc:1386:11 #11 0x6156ce4ca2ea in handle_one_connection /test/10.11_opt_san/sql/sql_connect.cc:1298:5 #12 0x6156cd8abdbc in asan_thread_start(void*) asan_interceptors.cpp.o #13 0x796a8ec9ca93 in start_thread nptl/pthread_create.c:447:8 #14 0x796a8ed29c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.11_opt_san/strings/ctype-latin1.c:684:24

Roel Van de Paar added a comment - 2025-04-16 14:54

SET NAMES utf8mb4 COLLATE utf8mb4_bin;

DO CHAR((WEIGHT_STRING (EXTRACTVALUE ((0),('abcde')))) USING cp852);

Leads to:

CS 10.11.12 43c5d1303f5c7c726db276815c459436110f342f (Optimized, UBASAN, Clang) Build 15/02/2025
/test/10.11_opt_san/strings/ctype-utf8.c:418:60: runtime error: applying zero offset to null pointer
#0 0x5c60347469fd in my_strnxfrm_unicode_full_bin /test/10.11_opt_san/strings/ctype-utf8.c:418:60
#1 0x5c6033324596 in charset_info_st::strnxfrm(char, unsigned long, unsigned int, char const, unsigned long, unsigned int) const /test/10.11_opt_san/include/m_ctype.h:1033:12
#2 0x5c6033324596 in Item_func_weight_string::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:4031:19
#3 0x5c60332de32e in Item_str_func::val_int() /test/10.11_opt_san/sql/item_strfunc.cc:168:16
#4 0x5c6033316112 in Item_func_char::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:3238:32
#5 0x5c6032b3ef33 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.11_opt_san/sql/sql_type.cc:4351:16
#6 0x5c6031db0145 in Item_func::is_null() /test/10.11_opt_san/sql/item_func.h:248:5
#7 0x5c6033735580 in mysql_do(THD*, List<Item>&) /test/10.11_opt_san/sql/sql_do.cc:36:19
#8 0x5c6032267ed9 in mysql_execute_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:4041:10
#9 0x5c6032240dc0 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/10.11_opt_san/sql/sql_parse.cc:8188:18
#10 0x5c60322380fd in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/10.11_opt_san/sql/sql_parse.cc:1905:7
#11 0x5c6032243086 in do_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:1418:17
#12 0x5c60328a6a9c in do_handle_one_connection(CONNECT*, bool) /test/10.11_opt_san/sql/sql_connect.cc:1386:11
#13 0x5c60328a62ea in handle_one_connection /test/10.11_opt_san/sql/sql_connect.cc:1298:5
#14 0x5c6031c87dbc in asan_thread_start(void*) asan_interceptors.cpp.o
#15 0x75c16189ca93 in start_thread nptl/pthread_create.c:447:8
#16 0x75c161929c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.11_opt_san/strings/ctype-utf8.c:418:60

Roel Van de Paar added a comment - 2025-04-16 14:54 SET NAMES utf8mb4 COLLATE utf8mb4_bin; DO CHAR ((WEIGHT_STRING (EXTRACTVALUE ((0),( 'abcde' )))) USING cp852); Leads to: CS 10.11.12 43c5d1303f5c7c726db276815c459436110f342f (Optimized, UBASAN, Clang) Build 15/02/2025 /test/10.11_opt_san/strings/ctype-utf8.c:418:60: runtime error: applying zero offset to null pointer #0 0x5c60347469fd in my_strnxfrm_unicode_full_bin /test/10.11_opt_san/strings/ctype-utf8.c:418:60 #1 0x5c6033324596 in charset_info_st::strnxfrm(char*, unsigned long, unsigned int, char const*, unsigned long, unsigned int) const /test/10.11_opt_san/include/m_ctype.h:1033:12 #2 0x5c6033324596 in Item_func_weight_string::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:4031:19 #3 0x5c60332de32e in Item_str_func::val_int() /test/10.11_opt_san/sql/item_strfunc.cc:168:16 #4 0x5c6033316112 in Item_func_char::val_str(String*) /test/10.11_opt_san/sql/item_strfunc.cc:3238:32 #5 0x5c6032b3ef33 in Type_handler_string_result::Item_update_null_value(Item*) const /test/10.11_opt_san/sql/sql_type.cc:4351:16 #6 0x5c6031db0145 in Item_func::is_null() /test/10.11_opt_san/sql/item_func.h:248:5 #7 0x5c6033735580 in mysql_do(THD*, List<Item>&) /test/10.11_opt_san/sql/sql_do.cc:36:19 #8 0x5c6032267ed9 in mysql_execute_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:4041:10 #9 0x5c6032240dc0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.11_opt_san/sql/sql_parse.cc:8188:18 #10 0x5c60322380fd in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.11_opt_san/sql/sql_parse.cc:1905:7 #11 0x5c6032243086 in do_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:1418:17 #12 0x5c60328a6a9c in do_handle_one_connection(CONNECT*, bool) /test/10.11_opt_san/sql/sql_connect.cc:1386:11 #13 0x5c60328a62ea in handle_one_connection /test/10.11_opt_san/sql/sql_connect.cc:1298:5 #14 0x5c6031c87dbc in asan_thread_start(void*) asan_interceptors.cpp.o #15 0x75c16189ca93 in start_thread nptl/pthread_create.c:447:8 #16 0x75c161929c3b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset /test/10.11_opt_san/strings/ctype-utf8.c:418:60

MariaDB Server

UBSAN: runtime error: applying zero offset to null pointer in my_strnxfrm_utf8mb3_general_ci, my_uca_scanner_init_any and my_uca_scanner_next_utf8mb3 and in _utf8mb4 functions, and null pointer passed as argument 2, which is declared to never be null

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