bisecting cause commit starting from 1d966eb4d6326a2521073174e9710713e9846e8b building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2 testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0 kernel signature: 9c9c155b36e171c041993f46d60ec68d8a2641d6 all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0 kernel signature: 94289346367c68079b260a82d43126f2191f35e4 all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0 kernel signature: 85adcf470d8eb18b2fa31bdb199b00c95d31cffb all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0 kernel signature: 5db76abb3ed7287544bc3dc244d949104d240fca all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0 kernel signature: 987f8fc752c62572eba98c6c3de669383f467fbe all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 kernel signature: 77831228ecc257fa3a7569d4e09019b2eef88b84 all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 kernel signature: ecac724e50f485e05c6919e32a57da6954414fc5 all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 kernel signature: 7db00e2ee0a9f2cb59e44d9406a216e307446f02 run #0: crashed: WARNING in __kmalloc_track_caller run #1: crashed: WARNING in __kmalloc_track_caller run #2: crashed: WARNING in __kmalloc_track_caller run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in __kmalloc_track_caller run #5: crashed: WARNING in __kmalloc_track_caller run #6: crashed: WARNING in __kmalloc_track_caller run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in __kmalloc_track_caller run #9: crashed: WARNING in corrupted testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 kernel signature: 17f17cc58c75d06a10efae6ca655a665179d5157 run #0: crashed: WARNING in __kmalloc_track_caller run #1: crashed: WARNING in __kmalloc_track_caller run #2: crashed: WARNING in __kmalloc_track_caller run #3: crashed: WARNING in __kmalloc_track_caller run #4: crashed: WARNING in __kmalloc_track_caller run #5: crashed: WARNING in __kmalloc_track_caller run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in __kmalloc_track_caller run #9: crashed: WARNING in __kmalloc_track_caller testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 kernel signature: 03bf69c8f59f5b40ff7e1f7be37ec12bc5885024 run #0: crashed: WARNING in dccp_set_state run #1: crashed: WARNING in dccp_set_state run #2: crashed: WARNING in dccp_set_state run #3: crashed: WARNING in dccp_set_state run #4: crashed: WARNING in dccp_set_state run #5: crashed: WARNING in dccp_set_state run #6: crashed: WARNING in dccp_set_state run #7: crashed: WARNING in dccp_set_state run #8: crashed: WARNING in corrupted run #9: crashed: WARNING in dccp_set_state testing release v4.5 testing commit b562e44f507e863c6792946e4e1b1449fbbac85d with gcc (GCC) 5.5.0 kernel signature: 265804a317d23d9e816769c7a9080a9b394d483b run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in dccp_set_state run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in corrupted run #9: crashed: WARNING in dccp_set_state testing release v4.4 testing commit afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc with gcc (GCC) 5.5.0 kernel signature: 280cb67196a435d47b82dab80ecff5d086712d78 run #0: crashed: WARNING in dccp_set_state run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in dccp_set_state run #6: crashed: WARNING in dccp_set_state run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in dccp_set_state run #9: crashed: WARNING in corrupted testing release v4.3 testing commit 6a13feb9c82803e2b815eca72fa7a9f5561d7861 with gcc (GCC) 5.5.0 kernel signature: d4db2e67ac7663d3140a4031d48b295b1029611f run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in dccp_set_state run #2: crashed: WARNING in dccp_set_state run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in corrupted run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in corrupted run #9: crashed: no output from test machine testing release v4.2 testing commit 64291f7db5bd8150a74ad2036f1037e6a0428df2 with gcc (GCC) 5.5.0 kernel signature: 4cd16058fc5c63f6df61e75e46ac85896cfa3099 run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in corrupted run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in corrupted run #9: crashed: no output from test machine testing release v4.1 testing commit b953c0d234bc72e8489d3bf51a276c5c4ec85345 with gcc (GCC) 5.5.0 kernel signature: ea9c1b0c5e497360cd8fb70c04e6596c0d7b7435 run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in dccp_set_state run #4: crashed: WARNING in corrupted run #5: crashed: WARNING in corrupted run #6: crashed: WARNING in dccp_set_state run #7: crashed: WARNING in corrupted run #8: crashed: no output from test machine run #9: crashed: no output from test machine revisions tested: 15, total time: 1h41m13.420152406s (build: 38m48.725996201s, test: 1h0m42.054173206s) the crash already happened on the oldest tested release commit msg: Linux 4.1 crash: no output from test machine