syzbot has found a reproducer for the following issue on: HEAD commit: 34d1d36073ea Add linux-next specific files for 20220621 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=11eeec3ff00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b24b62d1c051cfc8 dashboard link: https://syzkaller.appspot.com/bug?extid=dbbd022e608bb122cf4e compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1216c174080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14362fd8080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dbbd022e608bb122cf4e@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 8191 ntfs3: loop0: Mark volume as dirty due to NTFS errors general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 3604 Comm: syz-executor200 Not tainted 5.19.0-rc3-next-20220621-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:map_buffer_to_folio fs/mpage.c:107 [inline] RIP: 0010:do_mpage_readpage+0xfe8/0x19f0 fs/mpage.c:228 Code: 85 ed 0f 84 98 01 00 00 49 be 00 00 00 00 00 fc ff df 4c 89 ed 45 31 e4 eb 2c e8 73 8f 93 ff 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 53 08 00 00 48 8b 6d 08 41 83 c4 01 49 39 ed RSP: 0018:ffffc90002f9f7c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff8880206957c0 RSI: ffffffff81e72ddd RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffc90002f9f960 FS: 000055555626d300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005d84c8 CR3: 000000007e93c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> mpage_read_folio+0xa5/0x140 fs/mpage.c:378 ntfs_read_folio+0x148/0x1e0 fs/ntfs3/inode.c:706 filemap_read_folio+0x3c/0x1d0 mm/filemap.c:2396 do_read_cache_folio+0x251/0x5b0 mm/filemap.c:3521 do_read_cache_page mm/filemap.c:3563 [inline] read_cache_page+0x59/0x2a0 mm/filemap.c:3572 read_mapping_page include/linux/pagemap.h:756 [inline] ntfs_map_page fs/ntfs3/ntfs_fs.h:897 [inline] ntfs_fill_super+0x27e9/0x3730 fs/ntfs3/super.c:1145 get_tree_bdev+0x4a2/0x7e0 fs/super.c:1294 vfs_get_tree+0x89/0x2f0 fs/super.c:1501 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f240cf2feaa Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffefafe8648 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffefafe86a0 RCX: 00007f240cf2feaa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffefafe8660 RBP: 00007ffefafe8660 R08: 00007ffefafe86a0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200034e8 R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000021f </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:map_buffer_to_folio fs/mpage.c:107 [inline] RIP: 0010:do_mpage_readpage+0xfe8/0x19f0 fs/mpage.c:228 Code: 85 ed 0f 84 98 01 00 00 49 be 00 00 00 00 00 fc ff df 4c 89 ed 45 31 e4 eb 2c e8 73 8f 93 ff 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 53 08 00 00 48 8b 6d 08 41 83 c4 01 49 39 ed RSP: 0018:ffffc90002f9f7c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff8880206957c0 RSI: ffffffff81e72ddd RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffc90002f9f960 FS: 000055555626d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f240cf1fd20 CR3: 000000007e93c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 85 ed test %ebp,%ebp 2: 0f 84 98 01 00 00 je 0x1a0 8: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 f: fc ff df 12: 4c 89 ed mov %r13,%rbp 15: 45 31 e4 xor %r12d,%r12d 18: eb 2c jmp 0x46 1a: e8 73 8f 93 ff callq 0xff938f92 1f: 48 8d 7d 08 lea 0x8(%rbp),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 53 08 00 00 jne 0x888 35: 48 8b 6d 08 mov 0x8(%rbp),%rbp 39: 41 83 c4 01 add $0x1,%r12d 3d: 49 39 ed cmp %rbp,%r13
