panic: ASan: Invalid access, 4-byte read at 0xfffffe009c115838, UMAUseAfterFree(fd) cpuid = 0 time = 1636303182 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe00077fc4f0 kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe00077fc650 vpanic() at vpanic+0x2b8/frame 0xfffffe00077fc730 panic() at panic+0xb5/frame 0xfffffe00077fc7f0 __asan_load4_noabort() at __asan_load4_noabort+0x216/frame 0xfffffe00077fc8b0 sctp_med_chunk_output() at sctp_med_chunk_output+0x557/frame 0xfffffe00077fd460 sctp_chunk_output() at sctp_chunk_output+0x2b25/frame 0xfffffe00077fe0b0 sctp_process_control() at sctp_process_control+0x7b22/frame 0xfffffe00077fe780 sctp_common_input_processing() at sctp_common_input_processing+0xb26/frame 0xfffffe00077fe9e0 sctp_input_with_port() at sctp_input_with_port+0x587/frame 0xfffffe00077feb70 sctp_input() at sctp_input+0x32/frame 0xfffffe00077feb90 ip_input() at ip_input+0x69e/frame 0xfffffe00077fecf0 swi_net() at swi_net+0x2e5/frame 0xfffffe00077fed90 ithread_loop() at ithread_loop+0x4f1/frame 0xfffffe00077feef0 fork_exit() at fork_exit+0xd0/frame 0xfffffe00077fef30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00077fef30 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 12 tid 100030 ] Stopped at kdb_enter+0x6b: movq $0,0x28dc5fa(%rip) db> db> set $lines = 0 db> set $maxwidth = 0 db> show registers cs 0x20 ds 0x3b es 0x3b fs 0x13 gs 0x1b ss 0x28 rax 0x12 rcx 0x55ca3e14575d348c rdx 0x1 rbx 0 rsp 0xfffffe00077fc630 rbp 0xfffffe00077fc650 rsi 0 rdi 0xffffffff817c4b3a vprintf+0x35a r8 0 r9 0xfffffe00077fc168 r10 0 r11 0 r12 0xfffffe0053e8ec80 r13 0xfffffe00077fc601 r14 0xffffffff82c8dfe0 .str.18 r15 0xffffffff82c8dfe0 .str.18 rip 0xffffffff817b84bb kdb_enter+0x6b rflags 0x46 kdb_enter+0x6b: movq $0,0x28dc5fa(%rip) db> show proc Process 12 (intr) at 0xfffffe0053dd2548: state: NORMAL uid: 0 gids: 0 parent: pid 0 at 0xffffffff84035a40 ABI: null flag: 0x10000284 flag2: 0 reaper: 0xffffffff84035a40 reapsubtree: 12 sigparent: 20 vmspace: 0xffffffff840369e0 (map 0xffffffff840369e0) (map.pmap 0xffffffff84036aa0) (pmap 0xffffffff84036b08) threads: 23 100013 I [swi5: fast taskq] 100017 I [swi6: task queue] 100018 I [swi6: Giant taskq] 100029 I [swi3: vm] 100030 Run CPU 0 [swi1: netisr 0] 100031 I [swi4: clock (0)] 100032 I [swi4: clock (1)] 100033 I [swi1: hpts] 100034 I [swi1: hpts] 100047 I [irq24: virtio_pci0] 100048 I [irq25: virtio_pci0] 100049 I [irq26: virtio_pci0] 100050 I [irq27: virtio_pci0] 100051 I [irq28: virtio_pci1] 100052 I [irq29: virtio_pci1] 100053 I [irq30: virtio_pci1] 100054 I [irq31: virtio_pci1] 100055 I [irq32: virtio_pci1] 100060 I [irq10: virtio_pci2] 100062 I [irq1: atkbd0] 100063 I [irq12: psm0] 100064 I [swi0: uart uart++] 100068 I [swi1: pf send] db> ps pid ppid pgrp uid state wmesg wchan cmd 37583 780 780 0 RE CPU 1 syz-executor.2 37582 778 778 0 R (threaded) syz-executor.0 168283 RunQ syz-executor.0 168537 RunQ syz-executor.0 37577 781 781 0 R syz-executor.3 37576 779 779 0 R (threaded) syz-executor.1 168451 RunQ syz-executor.1 168530 S uwait 0xfffffe00a9e57600 syz-executor.1 36489 1 780 0 SV uwait 0xfffffe00a9e57f00 syz-executor.2 36482 1 780 0 SV uwait 0xfffffe00a8d73700 syz-executor.2 36435 1 781 0 S uwait 0xfffffe00574e2200 syz-executor.3 36427 1 780 0 S uwait 0xfffffe00a9e56300 syz-executor.2 36426 1 780 0 S uwait 0xfffffe00a8d73b80 syz-executor.2 36364 36362 781 0 SV uwait 0xfffffe00a8d73980 syz-executor.3 36362 1 781 0 DV ppwait 0xfffffe00aab864f8 syz-executor.3 33165 33160 778 0 SV uwait 0xfffffe00a9e57300 syz-executor.0 33160 1 778 0 DV ppwait 0xfffffe00aacaef88 syz-executor.0 30339 1 779 0 S uwait 0xfffffe00a8269d80 syz-executor.1 30330 1 779 0 S uwait 0xfffffe00a8267d00 syz-executor.1 30318 1 779 0 S uwait 0xfffffe0057079880 syz-executor.1 30313 1 779 0 S uwait 0xfffffe00a9e56f00 syz-executor.1 30311 1 779 0 S uwait 0xfffffe00a8d73000 syz-executor.1 29577 1 779 0 S uwait 0xfffffe00a9e57a00 syz-executor.1 29572 1 780 0 S uwait 0xfffffe00a8d75900 syz-executor.2 29569 1 779 0 S uwait 0xfffffe00a9e57800 syz-executor.1 29563 1 780 0 S uwait 0xfffffe009eeece80 syz-executor.2 29559 1 779 0 S uwait 0xfffffe00a9e57e00 syz-executor.1 29554 1 780 0 S uwait 0xfffffe00a8268f00 syz-executor.2 29549 1 780 0 S uwait 0xfffffe00a9e58f00 syz-executor.2 29542 1 780 0 S uwait 0xfffffe00a8d75480 syz-executor.2 29316 1 779 0 S uwait 0xfffffe00a9e56800 syz-executor.1 29314 1 781 0 S uwait 0xfffffe00a9e59580 syz-executor.3 29310 1 779 0 S uwait 0xfffffe00574e2900 syz-executor.1 29308 1 781 0 S uwait 0xfffffe00a23b1580 syz-executor.3 29301 1 779 0 S uwait 0xfffffe00a9e58c80 syz-executor.1 29300 1 781 0 S uwait 0xfffffe00a9e58380 syz-executor.3 29295 1 781 0 S uwait 0xfffffe00a9e58580 syz-executor.3 29292 1 781 0 S uwait 0xfffffe00a9e59680 syz-executor.3 29079 1 781 0 S uwait 0xfffffe00a23b1f00 syz-executor.3 29072 1 781 0 S uwait 0xfffffe00a9e59980 syz-executor.3 28545 1 781 0 S uwait 0xfffffe00a9e57500 syz-executor.3 28541 1 781 0 S uwait 0xfffffe00a9e57400 syz-executor.3 28532 1 781 0 S uwait 0xfffffe00a9e57900 syz-executor.3 28527 1 781 0 S uwait 0xfffffe00a9e57700 syz-executor.3 28523 1 781 0 S uwait 0xfffffe00a8d75680 syz-executor.3 28182 1 780 0 S uwait 0xfffffe00a9e58a80 syz-executor.2 28180 1 780 0 S uwait 0xfffffe00a9e58480 syz-executor.2 28177 1 780 0 S uwait 0xfffffe00a8266280 syz-executor.2 28175 1 780 0 S uwait 0xfffffe00a9e58980 syz-executor.2 28174 1 780 0 S uwait 0xfffffe00a8d73600 syz-executor.2 28051 1 780 0 S uwait 0xfffffe00a9e58d80 syz-executor.2 28050 1 780 0 S uwait 0xfffffe00a8266080 syz-executor.2 28018 1 780 0 S uwait 0xfffffe00a9e58880 syz-executor.2 28017 1 780 0 S uwait 0xfffffe00a8d72d80 syz-executor.2 27371 1 780 0 S uwait 0xfffffe00a23b1900 syz-executor.2 27370 1 780 0 S uwait 0xfffffe00a9e58b80 syz-executor.2 27368 1 780 0 S uwait 0xfffffe009eeec280 syz-executor.2 27366 1 780 0 S uwait 0xfffffe00a9e59a80 syz-executor.2 27364 1 780 0 S uwait 0xfffffe00a8d74080 syz-executor.2 27363 1 780 0 S uwait 0xfffffe00a9e58680 syz-executor.2 27361 1 780 0 S uwait 0xfffffe00a8267680 syz-executor.2 27360 1 780 0 S uwait 0xfffffe00a8d75500 syz-executor.2 27359 1 780 0 S uwait 0xfffffe00a8d75180 syz-executor.2 27358 1 780 0 S uwait 0xfffffe00a9e57c00 syz-executor.2 27305 1 779 0 S uwait 0xfffffe00a8269980 syz-executor.1 27296 1 779 0 S uwait 0xfffffe00a8d75800 syz-executor.1 27287 1 779 0 S uwait 0xfffffe00a8d75600 syz-executor.1 27275 1 779 0 S uwait 0xfffffe00a9e59780 syz-executor.1 27274 1 779 0 S uwait 0xfffffe00a8d72580 syz-executor.1 25725 1 779 0 S uwait 0xfffffe00a8d72180 syz-executor.1 25720 1 779 0 S uwait 0xfffffe00a8266180 syz-executor.1 25714 1 779 0 S uwait 0xfffffe00a8d72380 syz-executor.1 25712 1 779 0 S uwait 0xfffffe00a9e59480 syz-executor.1 25709 1 779 0 S uwait 0xfffffe00a8269a80 syz-executor.1 25099 25098 780 0 SV uwait 0xfffffe00a8d72800 syz-executor.2 25098 1 780 0 DV ppwait 0xfffffe00a9f63a40 syz-executor.2 24444 1 779 0 S uwait 0xfffffe00a8266380 syz-executor.1 24442 1 779 0 S uwait 0xfffffe00a8d73c80 syz-executor.1 24439 1 779 0 S uwait 0xfffffe00a8d72100 syz-executor.1 24438 1 779 0 S uwait 0xfffffe00a8d75000 syz-executor.1 24432 1 779 0 S uwait 0xfffffe00a8d72e80 syz-executor.1 24428 1 779 0 S uwait 0xfffffe00a23b1680 syz-executor.1 24424 1 779 0 S uwait 0xfffffe00a8d75100 syz-executor.1 24422 1 779 0 S uwait 0xfffffe00a8d72000 syz-executor.1 24416 1 779 0 S uwait 0xfffffe00a8268580 syz-executor.1 24415 1 779 0 S uwait 0xfffffe00a8d73a80 syz-executor.1 23945 1 778 0 S uwait 0xfffffe00a8d73500 syz-executor.0 23940 1 778 0 S uwait 0xfffffe009eeeaa80 syz-executor.0 23936 1 778 0 S uwait 0xfffffe00a8267400 syz-executor.0 23932 1 778 0 S uwait 0xfffffe00a8d73400 syz-executor.0 23924 1 778 0 S uwait 0xfffffe00a8d73100 syz-executor.0 23562 1 781 0 S uwait 0xfffffe00a8266500 syz-executor.3 23558 1 781 0 S uwait 0xfffffe00a8267c80 syz-executor.3 23253 1 778 0 S uwait 0xfffffe00a8266d80 syz-executor.0 23246 1 778 0 S uwait 0xfffffe00a8266e80 syz-executor.0 23243 1 778 0 S uwait 0xfffffe00a8d73200 syz-executor.0 23239 1 778 0 S uwait 0xfffffe00a8d75980 syz