bisecting fixing commit since 583090b1b8232e6eae243a9009699666153a13a9
building syzkaller on d81b165e87aa21172574c227b0808df2957e29ce
testing commit 583090b1b8232e6eae243a9009699666153a13a9 with gcc (GCC) 8.4.1 20210217
kernel signature: 05f38585c13dd5f31655ba9a2c6ef7a8d7deb20472e27586c2c5ebe69c136925
all runs: crashed: kernel BUG in ntfs_readpage
testing current HEAD 1678e493d530e7977cce34e59a86bb86f3c5631e
testing commit 1678e493d530e7977cce34e59a86bb86f3c5631e with gcc (GCC) 10.2.1 20210217
kernel signature: ef66c396778bb08b05bf5eb6a5bd9661f80f92d82490bce1b08120566da94dd8
all runs: crashed: kernel BUG in ntfs_readpage
revisions tested: 2, total time: 19m46.839847474s (build: 12m46.210818527s, test: 6m19.333398245s)
the crash still happens on HEAD
commit msg: Merge tag 'lto-v5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
crash: kernel BUG in ntfs_readpage
loop2: detected capacity change from 0 to 71
ntfs: (device loop2): is_boot_sector_ntfs(): Invalid end of sector marker.
------------[ cut here ]------------
kernel BUG at fs/ntfs/aops.c:186!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7471 Comm: syz-executor.2 Not tainted 5.12.0-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:186 [inline]
RIP: 0010:ntfs_readpage+0x1484/0x1ca0 fs/ntfs/aops.c:435
Code: ff ff 37 00 48 c1 ea 03 48 c1 e0 2a 80 3c 02 00 0f 85 e2 05 00 00 48 8b 44 24 28 48 8b 80 30 fd ff ff a8 08 0f 85 5c f4 ff ff <0f> 0b 48 c7 c6 00 03 59 88 4c 89 ff e8 0b 53 41 ff 0f 0b 48 c7 c6
RSP: 0018:ffffc900044777b0 EFLAGS: 00010246
RAX: 0000000000000230 RBX: ffff88812bd40d08 RCX: ffffffff8257bd06
RDX: 1ffff110257a8102 RSI: 0000000000000008 RDI: ffff88812bd40810
RBP: ffff88812bd40810 R08: 0000000000000000 R09: ffff88812bd40817
R10: ffffed10257a8102 R11: 0000000000000100 R12: fffff940009547a1
R13: ffffea0004aa3d20 R14: dffffc0000000000 R15: ffffea0004aa3d00
FS:  00007f40fc1a4700(0000) GS:ffff8881f6300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa045fd908 CR3: 000000011af0e001 CR4: 00000000001706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_read_cache_page+0x540/0xd00 mm/filemap.c:3263
 read_mapping_page include/linux/pagemap.h:500 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 map_mft_record_page fs/ntfs/mft.c:73 [inline]
 map_mft_record+0x18f/0xc60 fs/ntfs/mft.c:156
 ntfs_read_locked_inode+0x183/0x5620 fs/ntfs/inode.c:550
 ntfs_read_inode_mount+0xbb7/0x20b0 fs/ntfs/inode.c:2087
 ntfs_fill_super+0x94a/0x6c30 fs/ntfs/super.c:2856
 mount_bdev+0x2cb/0x3b0 fs/super.c:1367
 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:592
 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x7f3/0x1a40 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount fs/namespace.c:3431 [inline]
 __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3431
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466d2a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f40fc1a3fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000466d2a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f40fc1a4000
RBP: 00007f40fc1a4040 R08: 00007f40fc1a4040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f40fc1a4000 R15: 000000002007dc00
Modules linked in:
---[ end trace ae8153a46037478c ]---
RIP: 0010:ntfs_read_block fs/ntfs/aops.c:186 [inline]
RIP: 0010:ntfs_readpage+0x1484/0x1ca0 fs/ntfs/aops.c:435
Code: ff ff 37 00 48 c1 ea 03 48 c1 e0 2a 80 3c 02 00 0f 85 e2 05 00 00 48 8b 44 24 28 48 8b 80 30 fd ff ff a8 08 0f 85 5c f4 ff ff <0f> 0b 48 c7 c6 00 03 59 88 4c 89 ff e8 0b 53 41 ff 0f 0b 48 c7 c6
RSP: 0018:ffffc900044777b0 EFLAGS: 00010246

RAX: 0000000000000230 RBX: ffff88812bd40d08 RCX: ffffffff8257bd06
RDX: 1ffff110257a8102 RSI: 0000000000000008 RDI: ffff88812bd40810
RBP: ffff88812bd40810 R08: 0000000000000000 R09: ffff88812bd40817
R10: ffffed10257a8102 R11: 0000000000000100 R12: fffff940009547a1
R13: ffffea0004aa3d20 R14: dffffc0000000000 R15: ffffea0004aa3d00
FS:  00007f40fc1a4700(0000) GS:ffff8881f6300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa045fd908 CR3: 000000011af0e001 CR4: 00000000001706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400