bisecting fixing commit since 87ef12027b9b1dd0e0b12cf311fbcb19f9d92539
building syzkaller on 3642839c105d2c84160c10866805f903a22fa343
testing commit 87ef12027b9b1dd0e0b12cf311fbcb19f9d92539 with gcc (GCC) 8.1.0
kernel signature: 1132551a5902e9b1b5d0fff8bd7884d99aeac2c1
all runs: crashed: kernel BUG at fs/ntfs/aops.c:LINE!
testing current HEAD 040a3c33623ba4bd11588ab0820281b854a3ffaf
testing commit 040a3c33623ba4bd11588ab0820281b854a3ffaf with gcc (GCC) 8.1.0
kernel signature: 459571ea8ed738dc953ef05c7a568b9836781789
all runs: crashed: kernel BUG at fs/ntfs/aops.c:LINE!
revisions tested: 2, total time: 17m28.793372613s (build: 10m11.379638898s, test: 6m33.05157s)
the crash still happens on HEAD
commit msg: Merge tag 'iommu-fixes-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
crash: kernel BUG at fs/ntfs/aops.c:LINE!
ntfs: (device loop4): is_boot_sector_ntfs(): Invalid end of sector marker.
ntfs: (device loop0): is_boot_sector_ntfs(): Invalid end of sector marker.
ntfs: (device loop5): is_boot_sector_ntfs(): Invalid end of sector marker.
------------[ cut here ]------------
kernel BUG at fs/ntfs/aops.c:189!
invalid opcode: 0000 [#1] SMP KASAN
------------[ cut here ]------------
CPU: 0 PID: 4565 Comm: syz-executor4 Not tainted 5.5.0-rc5-syzkaller #0
kernel BUG at fs/ntfs/aops.c:189!
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ntfs_read_block fs/ntfs/aops.c:189 [inline]
RIP: 0010:ntfs_readpage+0x174e/0x1cc0 fs/ntfs/aops.c:438
Code: 89 fa 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 39 05 00 00 48 8b 85 18 ff ff ff 48 8b 80 70 fd ff ff a8 08 0f 85 5d f3 ff ff <0f> 0b 0f 0b 0f 0b 4c 89 f7 41 bc f4 ff ff ff e8 2e 1d 5f ff e9 75
RSP: 0018:ffff8881c22576d8 EFLAGS: 00010246
RAX: 0000000000000230 RBX: ffff8881ce9ebc60 RCX: ffffffff82233cc0
RDX: 1ffff11039d3d6f9 RSI: 0000000000000008 RDI: ffff8881ce9eb7c8
RBP: ffff8881c2257858 R08: ffffed1039d3d6fa R09: ffffed1039d3d6fa
R10: ffffed1039d3d6f9 R11: ffff8881ce9eb7cf R12: ffffea0006e95d60
R13: ffff8881ce9eb7c8 R14: ffffea0006e95d40 R15: dffffc0000000000
FS:  00007fe51c649700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c051 CR3: 00000001c19cd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_read_cache_page+0x65c/0x12d0 mm/filemap.c:2783
 read_cache_page+0x45/0x70 mm/filemap.c:2874
 read_mapping_page include/linux/pagemap.h:396 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 map_mft_record_page fs/ntfs/mft.c:73 [inline]
 map_mft_record+0x184/0x950 fs/ntfs/mft.c:156
 ntfs_read_locked_inode+0x18e/0x52a0 fs/ntfs/inode.c:549
 ntfs_read_inode_mount+0xa3f/0x20c0 fs/ntfs/inode.c:2074
 ntfs_fill_super+0x121e/0x2d50 fs/ntfs/super.c:2857
 mount_bdev+0x27b/0x340 fs/super.c:1417
 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3051
 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:647
 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2822 [inline]
 do_mount+0x1285/0x1b70 fs/namespace.c:3142
 __do_sys_mount fs/namespace.c:3351 [inline]
 __se_sys_mount fs/namespace.c:3328 [inline]
 __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3328
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457eaa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007fe51c648bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457eaa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fe51c648c00
RBP: 00000000000000b2 R08: 000000002007e200 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 000000000000067c R14: 00000000006fcc40 R15: 0000000000000000
Modules linked in:
invalid opcode: 0000 [#2] SMP KASAN
---[ end trace 7261366939cf0bf3 ]---
CPU: 1 PID: 4566 Comm: syz-executor Tainted: G      D           5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ntfs_read_block fs/ntfs/aops.c:189 [inline]
RIP: 0010:ntfs_readpage+0x174e/0x1cc0 fs/ntfs/aops.c:438
Code: 89 fa 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 39 05 00 00 48 8b 85 18 ff ff ff 48 8b 80 70 fd ff ff a8 08 0f 85 5d f3 ff ff <0f> 0b 0f 0b 0f 0b 4c 89 f7 41 bc f4 ff ff ff e8 2e 1d 5f ff e9 75
RIP: 0010:ntfs_read_block fs/ntfs/aops.c:189 [inline]
RIP: 0010:ntfs_readpage+0x174e/0x1cc0 fs/ntfs/aops.c:438
RSP: 0018:ffff8881c22af6d8 EFLAGS: 00010246
RAX: 0000000000000230 RBX: ffff8881cebedca0 RCX: ffffffff82233cc0
RDX: 1ffff11039d7db01 RSI: 0000000000000008 RDI: ffff8881cebed808
RBP: ffff8881c22af858 R08: ffffed1039d7db02 R09: ffffed1039d7db02
R10: ffffed1039d7db01 R11: ffff8881cebed80f R12: ffffea0006e949e0
Code: 89 fa 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 39 05 00 00 48 8b 85 18 ff ff ff 48 8b 80 70 fd ff ff a8 08 0f 85 5d f3 ff ff <0f> 0b 0f 0b 0f 0b 4c 89 f7 41 bc f4 ff ff ff e8 2e 1d 5f ff e9 75
R13: ffff8881cebed808 R14: ffffea0006e949c0 R15: dffffc0000000000
FS:  00007f6510907700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000700000 CR3: 00000001c1983000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
RSP: 0018:ffff8881c22576d8 EFLAGS: 00010246
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
RAX: 0000000000000230 RBX: ffff8881ce9ebc60 RCX: ffffffff82233cc0
RDX: 1ffff11039d3d6f9 RSI: 0000000000000008 RDI: ffff8881ce9eb7c8
 do_read_cache_page+0x65c/0x12d0 mm/filemap.c:2783
RBP: ffff8881c2257858 R08: ffffed1039d3d6fa R09: ffffed1039d3d6fa
R10: ffffed1039d3d6f9 R11: ffff8881ce9eb7cf R12: ffffea0006e95d60
 read_cache_page+0x45/0x70 mm/filemap.c:2874
 read_mapping_page include/linux/pagemap.h:396 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 map_mft_record_page fs/ntfs/mft.c:73 [inline]
 map_mft_record+0x184/0x950 fs/ntfs/mft.c:156
 ntfs_read_locked_inode+0x18e/0x52a0 fs/ntfs/inode.c:549
 ntfs_read_inode_mount+0xa3f/0x20c0 fs/ntfs/inode.c:2074
 ntfs_fill_super+0x121e/0x2d50 fs/ntfs/super.c:2857
 mount_bdev+0x27b/0x340 fs/super.c:1417
R13: ffff8881ce9eb7c8 R14: ffffea0006e95d40 R15: dffffc0000000000
 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3051
 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:647
 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547
FS:  00007fe51c649700(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
 do_new_mount fs/namespace.c:2822 [inline]
 do_mount+0x1285/0x1b70 fs/namespace.c:3142
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c051 CR3: 00000001c19cd000 CR4: 00000000001406f0
 __do_sys_mount fs/namespace.c:3351 [inline]
 __se_sys_mount fs/namespace.c:3328 [inline]
 __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3328
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
RIP: 0033:0x457eaa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f6510906bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5