bisecting cause commit starting from b5d903c2d656e9bc54bc76554a477d796a63120d
building syzkaller on 27c5f59f504f562333e3cd5e715fea5cb69c396e
testing commit b5d903c2d656e9bc54bc76554a477d796a63120d with gcc (GCC) 8.1.0
run #0: crashed: kernel BUG at fs/block_dev.c:LINE!
run #1: crashed: WARNING in blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: kernel BUG at fs/block_dev.c:LINE!
run #5: crashed: WARNING in blkdev_put
run #6: crashed: kernel BUG at fs/block_dev.c:LINE!
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: WARNING in __blkdev_put
run #8: crashed: kernel BUG at fs/block_dev.c:LINE!
run #9: crashed: WARNING in blkdev_put
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
run #0: crashed: kernel BUG at fs/block_dev.c:LINE!
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in blkdev_put
run #9: crashed: kernel BUG at fs/block_dev.c:LINE!
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
run #0: crashed: kernel BUG at fs/block_dev.c:LINE!
run #1: crashed: WARNING in blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in blkdev_put
run #6: crashed: WARNING in blkdev_put
run #7: crashed: kernel BUG at fs/block_dev.c:LINE!
run #8: crashed: kernel BUG at fs/block_dev.c:LINE!
run #9: crashed: kernel BUG at fs/block_dev.c:LINE!
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in blkdev_put
run #6: crashed: kernel BUG at fs/block_dev.c:LINE!
run #7: OK
run #8: OK
run #9: OK
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: OK
run #8: OK
run #9: OK
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: kernel BUG at fs/block_dev.c:LINE!
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in blkdev_put
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in blkdev_put
run #7: crashed: WARNING in __blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: kernel BUG at fs/block_dev.c:LINE!
run #7: crashed: WARNING in __blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in blkdev_put
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in blkdev_put
run #7: crashed: WARNING in __blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in __blkdev_put
run #7: crashed: WARNING in __blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.5
testing commit b562e44f507e863c6792946e4e1b1449fbbac85d with gcc (GCC) 5.5.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in blkdev_put
run #4: crashed: WARNING in blkdev_put
run #5: crashed: WARNING in blkdev_put
run #6: crashed: WARNING in blkdev_put
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.4
testing commit afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc with gcc (GCC) 5.5.0
run #0: crashed: WARNING in __blkdev_put
run #1: crashed: WARNING in blkdev_put
run #2: crashed: WARNING in __blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: WARNING in __blkdev_put
run #5: crashed: WARNING in __blkdev_put
run #6: crashed: WARNING in blkdev_put
run #7: crashed: WARNING in blkdev_put
run #8: crashed: WARNING in __blkdev_put
run #9: crashed: WARNING in __blkdev_put
testing release v4.3
testing commit 6a13feb9c82803e2b815eca72fa7a9f5561d7861 with gcc (GCC) 5.5.0
run #0: crashed: kernel BUG at fs/block_dev.c:LINE!
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: no output from test machine
run #5: crashed: no output from test machine
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: OK
testing release v4.2
testing commit 64291f7db5bd8150a74ad2036f1037e6a0428df2 with gcc (GCC) 5.5.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in __blkdev_put
run #2: crashed: WARNING in blkdev_put
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: no output from test machine
run #5: crashed: no output from test machine
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
testing release v4.1
testing commit b953c0d234bc72e8489d3bf51a276c5c4ec85345 with gcc (GCC) 5.5.0
run #0: crashed: WARNING in blkdev_put
run #1: crashed: WARNING in blkdev_put
run #2: crashed: kernel BUG at fs/block_dev.c:LINE!
run #3: crashed: WARNING in __blkdev_put
run #4: crashed: no output from test machine
run #5: crashed: no output from test machine
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
revisions tested: 18, total time: 3h33m50.59802557s (build: 1h5m48.101764601s, test: 2h21m57.921388288s)
the crash already happened on the oldest tested release
crash: no output from test machine