bisecting fixing commit since b5d903c2d656e9bc54bc76554a477d796a63120d
building syzkaller on 27c5f59f504f562333e3cd5e715fea5cb69c396e
testing commit b5d903c2d656e9bc54bc76554a477d796a63120d with gcc (GCC) 8.1.0
kernel signature: 97d48dff04e3328f08006018ae0b17619941b8e4
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 corrupted
run #9: crashed: kernel BUG at fs/block_dev.c:LINE!
testing current HEAD 2187f215ebaac73ddbd814696d7c7fa34f0c3de0
testing commit 2187f215ebaac73ddbd814696d7c7fa34f0c3de0 with gcc (GCC) 8.1.0
kernel signature: 55e713006e99f1b99fdef8929ccd7e86ee4bb5f1
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 corrupted
run #8: crashed: kernel BUG at fs/block_dev.c:LINE!
run #9: OK
revisions tested: 2, total time: 24m59.623995862s (build: 9m15.562707359s, test: 15m2.423503421s)
the crash still happens on HEAD
commit msg: Merge tag 'for-5.5-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: kernel BUG at fs/block_dev.c:LINE!
loop0: p1 size 135963288 extends beyond EOD, truncated
__loop_clr_fd: partition scan of loop1 failed (rc=-16)
loop3: p2 start 1279850000 is beyond EOD, truncated
loop0: p2 start 1279850000 is beyond EOD, truncated
------------[ cut here ]------------
kernel BUG at fs/block_dev.c:1213!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 0 PID: 20082 Comm: syz-executor4 Not tainted 5.5.0-rc2-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
RSP: 0018:ffff8881b384f958 EFLAGS: 00010282
RAX: ffff8881bd87e840 RBX: ffff8881b36ad840 RCX: ffffffff8152ae72
RDX: 1ffff110366d5b1c RSI: 0000000000000004 RDI: ffff8881b36ad8e0
RBP: ffff8881b384f978 R08: 0000000000000004 R09: ffffed1036709f18
R10: ffffed1036709f18 R11: 0000000000000003 R12: ffff8881cb125040
R13: ffff8881c1d0f2c0 R14: ffff8881cb1250e0 R15: ffff8881c1d0f2c0
FS:  00007fcdad843700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53eb19aa20 CR3: 00000001bfdd2000 CR4: 00000000001406f0
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:914
 do_last fs/namei.c:3420 [inline]
 path_openat+0xaee/0x3b90 fs/namei.c:3537
 do_filp_open+0x177/0x250 fs/namei.c:3567
 do_sys_open+0x1dd/0x3b0 fs/open.c:1097
 __do_sys_openat fs/open.c:1124 [inline]
 __se_sys_openat fs/open.c:1118 [inline]
 __x64_sys_openat+0x98/0xf0 fs/open.c:1118
 do_syscall_64+0xd0/0x600 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:00007fcdad842c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcdad8436d4 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 44348f9f687b5d34 ]---
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:ffff8881b384f958 EFLAGS: 00010282
RAX: ffff8881bd87e840 RBX: ffff8881b36ad840 RCX: ffffffff8152ae72
RDX: 1ffff110366d5b1c RSI: 0000000000000004 RDI: ffff8881b36ad8e0
RBP: ffff8881b384f978 R08: 0000000000000004 R09: ffffed1036709f18
R10: ffffed1036709f18 R11: 0000000000000003 R12: ffff8881cb125040
R13: ffff8881c1d0f2c0 R14: ffff8881cb1250e0 R15: ffff8881c1d0f2c0
FS:  00007fcdad843700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53eb19aa20 CR3: 00000001bfdd2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400