bisecting fixing commit since b5d903c2d656e9bc54bc76554a477d796a63120d
building syzkaller on 27c5f59f504f562333e3cd5e715fea5cb69c396e
testing commit b5d903c2d656e9bc54bc76554a477d796a63120d with gcc (GCC) 8.1.0
kernel signature: 6dad666ce5139d8d1074d56e18742b20237493bf3a4beb6f2c261a58e790e7de
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 corrupted
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 current HEAD b74b991fb8b9d642b8fea20d6245c6e19125a305
testing commit b74b991fb8b9d642b8fea20d6245c6e19125a305 with gcc (GCC) 8.1.0
kernel signature: a5d4ffacdffae824b2167f95299eee9a4ba43ebcf3c03d90c28775e72a4ae926
run #0: crashed: kernel BUG at fs/block_dev.c:LINE!
run #1: crashed: WARNING in blkdev_put
run #2: crashed: kernel BUG at fs/block_dev.c:LINE!
run #3: crashed: kernel BUG at fs/block_dev.c:LINE!
run #4: crashed: kernel BUG at fs/block_dev.c:LINE!
run #5: crashed: kernel BUG at fs/block_dev.c:LINE!
run #6: OK
run #7: crashed: kernel BUG at fs/block_dev.c:LINE!
run #8: OK
run #9: OK
revisions tested: 2, total time: 27m7.345376197s (build: 10m35.13167502s, test: 15m47.168387314s)
the crash still happens on HEAD
commit msg: Merge tag 'block-5.6-20200320' of git://git.kernel.dk/linux-block
crash: kernel BUG at fs/block_dev.c:LINE!
loop0: p2 start 1279850000 is beyond EOD, truncated
loop2: p2 start 1279850000 is beyond EOD, truncated
 loop3: [CUMANA/ADFS] p1 [Linux] p2 [ADFS] p1 [Linux] p2
------------[ cut here ]------------
loop3: partition table partially beyond EOD, truncated
kernel BUG at fs/block_dev.c:1213!
invalid opcode: 0000 [#1] SMP KASAN
loop3: p1 size 135963288 extends beyond EOD, truncated
CPU: 1 PID: 25325 Comm: syz-executor5 Not tainted 5.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bd_finish_claiming+0x5b/0x180 fs/block_dev.c:1213
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 13 01 00 00 48 8b 83 a0 00 00 00 4d 8d b4 24 a0 00 00 00 49 39 c5 74 4b 48 85 c0 74 02 <0f> 0b 4c 8d b3 a0 00 00 00 4c 39 e3 74 38 4d 8d b4 24 a0 00 00 00
loop3: p2 start 1279850000 is beyond EOD, truncated
RSP: 0018:ffff8881b41378b0 EFLAGS: 00010286
RAX: ffff8881d8f86d00 RBX: ffff8881d072b740 RCX: ffffffff81532322
RDX: 1ffff1103a0e56fc RSI: 0000000000000004 RDI: ffff8881d072b7e0
RBP: ffff8881b41378d0 R08: 0000000000000004 R09: ffffed1036826f03
R10: ffffed1036826f03 R11: 0000000000000003 R12: ffff8881cb5a3040
R13: ffff8881cd6cf340 R14: ffff8881cb5a30e0 R15: ffff8881cd6cf340
FS:  00007ff012f4b700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f147d9b2518 CR3: 00000001b953a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blkdev_get+0xc9/0x230 fs/block_dev.c:1744
 blkdev_open+0x19f/0x200 fs/block_dev.c:1875
 do_dentry_open+0x438/0x1200 fs/open.c:797
 vfs_open+0x9a/0xc0 fs/open.c:911
 do_last fs/namei.c:3490 [inline]
 path_openat+0x8f5/0x2d40 fs/namei.c:3607
 do_filp_open+0x171/0x240 fs/namei.c:3637
 do_sys_openat2+0x2e0/0x560 fs/open.c:1146
 do_sys_open+0x90/0xe0 fs/open.c:1162
 __do_sys_openat fs/open.c:1176 [inline]
 __se_sys_openat fs/open.c:1171 [inline]
 __x64_sys_openat+0x98/0xf0 fs/open.c:1171
 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455c79
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff012f4ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff012f4b6d4 RCX: 0000000000455c79
RDX: 0000000000101080 RSI: 0000000020000140 RDI: ffffffffffffff9c
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0296 R14: 00000000004cf518 R15: 0000000000000000
Modules linked in:
---[ end trace 7848b3e7d23e36ab ]---
RIP: 0010:bd_finish_claiming+0x5b/0x180 fs/block_dev.c:1213
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 13 01 00 00 48 8b 83 a0 00 00 00 4d 8d b4 24 a0 00 00 00 49 39 c5 74 4b 48 85 c0 74 02 <0f> 0b 4c 8d b3 a0 00 00 00 4c 39 e3 74 38 4d 8d b4 24 a0 00 00 00
RSP: 0018:ffff8881b41378b0 EFLAGS: 00010286
RAX: ffff8881d8f86d00 RBX: ffff8881d072b740 RCX: ffffffff81532322
RDX: 1ffff1103a0e56fc RSI: 0000000000000004 RDI: ffff8881d072b7e0
RBP: ffff8881b41378d0 R08: 0000000000000004 R09: ffffed1036826f03
R10: ffffed1036826f03 R11: 0000000000000003 R12: ffff8881cb5a3040
R13: ffff8881cd6cf340 R14: ffff8881cb5a30e0 R15: ffff8881cd6cf340
FS:  00007ff012f4b700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f147d9b2518 CR3: 00000001b953a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400