SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) sqlcipher/sqlite3.c:40233 in unixEnterMutex #582
Description
after upgrading to sqlcipher 4.12.0 i get this error when running a test program with TSAN test.
it used to work fine for ages with lots of previous versions of sqlcipher.
the last known working sqlcipher was 4.11.0
this is the test program: https://github.com/zoff99/iocipher_pack/blob/master/002_src_libsqlfs/tests/common.c
this is the CI run thats showing the issue: https://github.com/zoff99/iocipher_pack/actions/runs/20169599733/job/57901559928
2025-12-12T14:38:34.6356156Z WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=110497)
2025-12-12T14:38:34.6356333Z Cycle in lock order graph: M63 (0x7b0c00005c48) => M62 (0x559037654d28) => M63
2025-12-12T14:38:34.6356339Z
2025-12-12T14:38:34.6356485Z Mutex M62 acquired here while holding mutex M63 in main thread:
2025-12-12T14:38:34.6356941Z #0 pthread_mutex_lock ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:4240 (libtsan.so.0+0x53908)
2025-12-12T14:38:34.6357096Z #1 unixEnterMutex sqlcipher/sqlite3.c:40233 (c_api+0xbe49e)
2025-12-12T14:38:34.6357255Z #2 unixIsSharingShmNode sqlcipher/sqlite3.c:44012 (c_api+0xbe49e)
2025-12-12T14:38:34.6357368Z #3 unixLock sqlcipher/sqlite3.c:41363 (c_api+0xbe49e)
2025-12-12T14:38:34.6357476Z #4 unixLock sqlcipher/sqlite3.c:41198 (c_api+0xbe49e)
2025-12-12T14:38:34.6357565Z #5 <null> <null> (libc.so.6+0x29d8f)
2025-12-12T14:38:34.6357569Z
2025-12-12T14:38:34.6357784Z Hint: use TSAN_OPTIONS=second_deadlock_stack=1 to get more informative warning message
2025-12-12T14:38:34.6357907Z
2025-12-12T14:38:34.6358055Z Mutex M63 acquired here while holding mutex M62 in main thread:
2025-12-12T14:38:34.6358448Z #0 pthread_mutex_lock ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:4240 (libtsan.so.0+0x53908)
2025-12-12T14:38:34.6358565Z #1 unixClose sqlcipher/sqlite3.c:41682 (c_api+0xeef46)
2025-12-12T14:38:34.6358646Z #2 <null> <null> (libc.so.6+0x29d8f)
2025-12-12T14:38:34.6358657Z
2025-12-12T14:38:34.6359023Z SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) sqlcipher/sqlite3.c:40233 in unixEnterMutex
2025-12-12T14:38:34.6359088Z ==================
2025-12-12T14:38:34.6359177Z ThreadSanitizer: reported 1 warnings