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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) sqlcipher/sqlite3.c:40233 in unixEnterMutex","articleBody":"after upgrading to sqlcipher 4.12.0 i get this error when running a test program with TSAN test.\nit used to work fine for ages with lots of previous versions of sqlcipher.\nthe last known working sqlcipher was 4.11.0\n\nthis is the test program: https://github.com/zoff99/iocipher_pack/blob/master/002_src_libsqlfs/tests/common.c\n\nthis is the CI run thats showing the issue: https://github.com/zoff99/iocipher_pack/actions/runs/20169599733/job/57901559928\n\n```\n2025-12-12T14:38:34.6356156Z WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=110497)\n2025-12-12T14:38:34.6356333Z   Cycle in lock order graph: M63 (0x7b0c00005c48) =\u003e M62 (0x559037654d28) =\u003e M63\n2025-12-12T14:38:34.6356339Z \n2025-12-12T14:38:34.6356485Z   Mutex M62 acquired here while holding mutex M63 in main thread:\n2025-12-12T14:38:34.6356941Z     #0 pthread_mutex_lock ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:4240 (libtsan.so.0+0x53908)\n2025-12-12T14:38:34.6357096Z     #1 unixEnterMutex sqlcipher/sqlite3.c:40233 (c_api+0xbe49e)\n2025-12-12T14:38:34.6357255Z     #2 unixIsSharingShmNode sqlcipher/sqlite3.c:44012 (c_api+0xbe49e)\n2025-12-12T14:38:34.6357368Z     #3 unixLock sqlcipher/sqlite3.c:41363 (c_api+0xbe49e)\n2025-12-12T14:38:34.6357476Z     #4 unixLock sqlcipher/sqlite3.c:41198 (c_api+0xbe49e)\n2025-12-12T14:38:34.6357565Z     #5 \u003cnull\u003e \u003cnull\u003e (libc.so.6+0x29d8f)\n2025-12-12T14:38:34.6357569Z \n2025-12-12T14:38:34.6357784Z     Hint: use TSAN_OPTIONS=second_deadlock_stack=1 to get more informative warning message\n2025-12-12T14:38:34.6357907Z \n2025-12-12T14:38:34.6358055Z   Mutex M63 acquired here while holding mutex M62 in main thread:\n2025-12-12T14:38:34.6358448Z     #0 pthread_mutex_lock ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:4240 (libtsan.so.0+0x53908)\n2025-12-12T14:38:34.6358565Z     #1 unixClose sqlcipher/sqlite3.c:41682 (c_api+0xeef46)\n2025-12-12T14:38:34.6358646Z     #2 \u003cnull\u003e \u003cnull\u003e (libc.so.6+0x29d8f)\n2025-12-12T14:38:34.6358657Z \n2025-12-12T14:38:34.6359023Z SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) sqlcipher/sqlite3.c:40233 in unixEnterMutex\n2025-12-12T14:38:34.6359088Z ==================\n2025-12-12T14:38:34.6359177Z ThreadSanitizer: reported 1 warnings\n```","author":{"url":"https://github.com/zoff99","@type":"Person","name":"zoff99"},"datePublished":"2025-12-12T15:44:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/582/sqlcipher/issues/582"}