audit: type=1400 audit(1601025336.511:8): avc: denied { execmem } for pid=6471 comm="syz-executor963" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 ntfs: (device loop0): is_boot_sector_ntfs(): Invalid end of sector marker. ------------[ cut here ]------------ kernel BUG at fs/ntfs/aops.c:203! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6471 Comm: syz-executor963 Not tainted 4.19.147-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:203 [inline] RIP: 0010:ntfs_readpage+0x1c0b/0x24d0 fs/ntfs/aops.c:452 Code: ff e8 69 93 16 ff 48 8b 9d 80 fd ff ff 31 ff 48 c1 eb 03 83 e3 01 89 de e8 82 94 16 ff 84 db 0f 85 0b f0 ff ff e8 45 93 16 ff <0f> 0b 48 c7 c7 80 e3 bf 89 e8 e7 bc 5a 01 e8 32 93 16 ff 0f 0b 48 RSP: 0018:ffff888088547758 EFLAGS: 00010293 RAX: ffff8880a49880c0 RBX: 0000000000000000 RCX: ffffffff825b2f8e RDX: 0000000000000000 RSI: ffffffff825b2f9b RDI: 0000000000000001 RBP: ffff888080845a08 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888080845788 R14: 0000000000000001 R15: ffffea0002111180 FS: 0000000001765880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d42555710 CR3: 00000000a881c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_read_cache_page+0x533/0x1080 mm/filemap.c:2828 read_mapping_page include/linux/pagemap.h:402 [inline] ntfs_map_page fs/ntfs/aops.h:89 [inline] map_mft_record_page fs/ntfs/mft.c:87 [inline] map_mft_record+0x228/0xd00 fs/ntfs/mft.c:170 ntfs_read_locked_inode+0x19c/0x5490 fs/ntfs/inode.c:575 ntfs_read_inode_mount+0xcba/0x23b0 fs/ntfs/inode.c:2100 ntfs_fill_super+0x1761/0x89d2 fs/ntfs/super.c:2871 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446e9a Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad 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 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff47b2f258 EFLAGS: 00000287 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff47b2f2b0 RCX: 0000000000446e9a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff47b2f270 RBP: 00007fff47b2f270 R08: 00007fff47b2f2b0 R09: 00007fff00000015 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000008 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Modules linked in: ---[ end trace 0bf407d5fdd32026 ]--- RIP: 0010:ntfs_read_block fs/ntfs/aops.c:203 [inline] RIP: 0010:ntfs_readpage+0x1c0b/0x24d0 fs/ntfs/aops.c:452 Code: ff e8 69 93 16 ff 48 8b 9d 80 fd ff ff 31 ff 48 c1 eb 03 83 e3 01 89 de e8 82 94 16 ff 84 db 0f 85 0b f0 ff ff e8 45 93 16 ff <0f> 0b 48 c7 c7 80 e3 bf 89 e8 e7 bc 5a 01 e8 32 93 16 ff 0f 0b 48 RSP: 0018:ffff888088547758 EFLAGS: 00010293 RAX: ffff8880a49880c0 RBX: 0000000000000000 RCX: ffffffff825b2f8e RDX: 0000000000000000 RSI: ffffffff825b2f9b RDI: 0000000000000001 RBP: ffff888080845a08 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888080845788 R14: 0000000000000001 R15: ffffea0002111180 FS: 0000000001765880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d42555710 CR3: 00000000a881c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400