After updating `master` to 1dab8bae21bc32e5d4e3ff954f4919d6506ad2e1 surfing to an arbitrary website on my Linux box crashes my tor with ``` ================================================================= ==12974==ERROR: AddressSanitizer: heap-use-after-free on address 0x61d000001884 at pc 0x563a216f6558 bp 0x7ffed0c7b0d0 sp 0x7ffed0c7b0c8 READ of size 4 at 0x61d000001884 thread T0 #0 0x563a216f6557 in run_main_loop_once ../src/or/main.c:2783 #1 0x563a216f6557 in run_main_loop_until_done ../src/or/main.c:2852 #2 0x563a216f6557 in do_main_loop ../src/or/main.c:2735 #3 0x563a216f8e74 in tor_run_main ../src/or/main.c:4016 #4 0x563a216e4585 in tor_main ../src/or/tor_api.c:84 #5 0x563a216e178b in main ../src/or/tor_main.c:22 #6 0x7fe2e63e6560 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20560) #7 0x563a216e4239 in _start (/home/thomas/Arbeit/Tor/tor/build/src/or/tor+0x6a6239) 0x61d000001884 is located 1028 bytes inside of 2272-byte region [0x61d000001480,0x61d000001d60) freed by thread T0 here: #0 0x7fe2e8eea8c8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xd98c8) #1 0x563a21998102 in config_free_ ../src/or/confparse.c:882 #2 0x563a21952174 in or_options_free_ ../src/or/config.c:957 #3 0x563a2198075c in or_options_free_ ../src/or/config.c:933 #4 0x563a2198075c in set_options ../src/or/config.c:887 #5 0x563a2198670b in options_trial_assign ../src/or/config.c:2507 #6 0x563a21a17e79 in control_setconf_helper ../src/or/control.c:1021 #7 0x563a21a26190 in handle_control_setconf ../src/or/control.c:1059 #8 0x563a21a26190 in connection_control_process_inbuf ../src/or/control.c:5352 #9 0x563a219bfe2c in connection_handle_read_impl ../src/or/connection.c:3475 #10 0x563a216f3a57 in conn_read_callback ../src/or/main.c:861 #11 0x7fe2e86b09b9 (/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6+0x229b9) previously allocated by thread T0 here: #0 0x7fe2e8eeac20 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xd9c20) #1 0x563a21bda65a in tor_malloc_ ../src/common/util.c:150 #2 0x563a21bda701 in tor_malloc_zero_ ../src/common/util.c:178 #3 0x563a219869c8 in options_init_from_string ../src/or/config.c:5401 #4 0x563a21988b32 in options_init_from_torrc ../src/or/config.c:5298 #5 0x563a216f7292 in tor_init ../src/or/main.c:3299 #6 0x563a216f8a7f in tor_run_main ../src/or/main.c:3989 #7 0x563a216e4585 in tor_main ../src/or/tor_api.c:84 #8 0x563a216e178b in main ../src/or/tor_main.c:22 #9 0x7fe2e63e6560 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20560) SUMMARY: AddressSanitizer: heap-use-after-free ../src/or/main.c:2783 in run_main_loop_once Shadow bytes around the buggy address: 0x0c3a7fff82c0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff82d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff82e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff82f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8300: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd =>0x0c3a7fff8310:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8320: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8330: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8340: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8350: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3a7fff8360: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==12974==ABORTING ```