syzkaller login: [ 40.209727] can: request_module (can-proto-0) failed. [ 40.219495] can: request_module (can-proto-0) failed. [ 41.096704] IPVS: ftp: loaded support on port[0] = 21 [ 41.588042] ip (3452) used greatest stack depth: 23464 bytes left [ 42.514942] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.664364] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 42.673186] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.985615] tipc: TX() has been purged, node left! [ 44.470869] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts. 2020/08/08 03:41:08 parsed 1 programs 2020/08/08 03:41:08 executed programs: 0 [ 50.904706] IPVS: ftp: loaded support on port[0] = 21 [ 50.904943] IPVS: ftp: loaded support on port[0] = 21 [ 50.919033] IPVS: ftp: loaded support on port[0] = 21 [ 50.922117] IPVS: ftp: loaded support on port[0] = 21 [ 50.937092] IPVS: ftp: loaded support on port[0] = 21 [ 50.951052] IPVS: ftp: loaded support on port[0] = 21 [ 51.146495] ntfs: (device loop4): is_boot_sector_ntfs(): Invalid end of sector marker. [ 51.157834] ================================================================== [ 51.165245] BUG: KASAN: use-after-free in ntfs_attr_find+0x9b8/0xae0 [ 51.171747] Read of size 4 at addr ffff8881c76c4d35 by task syz-executor4/3747 [ 51.178362] ntfs: (device loop3): is_boot_sector_ntfs(): Invalid end of sector marker. [ 51.179093] [ 51.179109] CPU: 0 PID: 3747 Comm: syz-executor4 Not tainted 5.8.0-syzkaller #0 [ 51.179116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.179120] Call Trace: [ 51.179139] dump_stack+0x1a2/0x21e [ 51.211758] print_address_description.constprop.0+0x21/0x1f0 [ 51.217632] ? kasan_save_stack+0x42/0x50 [ 51.221795] ? lockdep_hardirqs_off+0x91/0xd0 [ 51.226286] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.231819] ? vprintk_func+0x98/0x13c [ 51.235699] ? ntfs_attr_find+0x9b8/0xae0 [ 51.239837] kasan_report.cold+0x20/0x37 [ 51.243910] ? __alloc_pages_nodemask+0x520/0x800 [ 51.248745] ? ntfs_attr_find+0x9b8/0xae0 [ 51.253839] __asan_report_load_n_noabort+0xf/0x20 [ 51.258759] ntfs_attr_find+0x9b8/0xae0 [ 51.262731] ntfs_attr_lookup+0x118f/0x22e0 [ 51.267062] ? mark_held_locks+0xa6/0xf0 [ 51.271124] ? ntfs_attr_get_search_ctx+0x46/0x200 [ 51.276048] ? ntfs_attr_reinit_search_ctx+0x3e0/0x3e0 [ 51.281316] ? kmem_cache_alloc+0x2f5/0x380 [ 51.285633] ntfs_read_inode_mount+0x72d/0x22f0 [ 51.290302] ntfs_fill_super+0x1825/0x96a0 [ 51.294534] ? load_and_init_usnjrnl+0x1070/0x1070 [ 51.299453] ? snprintf+0xbb/0xf0 [ 51.302896] ? vsprintf+0x40/0x40 [ 51.306341] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 51.311351] ? set_blocksize+0x1d3/0x420 [ 51.315414] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.320945] mount_bdev+0x331/0x3f0 [ 51.324565] ? load_and_init_usnjrnl+0x1070/0x1070 [ 51.329485] ntfs_mount+0x35/0x40 [ 51.332928] ? ntfs_rl_punch_nolock+0x1d00/0x1d00 [ 51.337761] legacy_get_tree+0x10c/0x220 [ 51.341828] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.347357] vfs_get_tree+0x93/0x300 [ 51.351064] path_mount+0x1439/0x21b0 [ 51.354858] ? copy_mount_string+0x40/0x40 [ 51.359083] ? getname_flags.part.0+0x1e0/0x4f0 [ 51.363746] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.369293] ? user_path_at_empty+0xd8/0x120 [ 51.373867] __x64_sys_mount+0x2b8/0x340 [ 51.377934] ? copy_mnt_ns+0xa60/0xa60 [ 51.381816] do_syscall_64+0x38/0x90 [ 51.385524] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.390702] RIP: 0033:0x457e6a [ 51.393888] Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 5d 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 3a 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 51.412783] RSP: 002b:00007f05b938dbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 51.420484] RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457e6a [ 51.427742] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f05b938dc00 [ 51.435000] RBP: 0000000000000002 R08: 000000002007e200 R09: 0000000020000000 [ 51.442263] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 [ 51.449534] R13: 000000000000066c R14: 00000000006fcac0 R15: 0000000000000000 [ 51.456813] [ 51.458425] The buggy address belongs to the page: [ 51.463351] page:0000000087dadc7a refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881c76c4a00 pfn:0x1c76c4 [ 51.474172] flags: 0x2fffc0000000000() [ 51.478056] raw: 02fffc0000000000 dead000000000100 dead000000000122 0000000000000000 [ 51.485935] raw: ffff8881c76c4a00 0000000000000000 00000000ffffffff 0000000000000000 [ 51.493884] page dumped because: kasan: bad access detected [ 51.499575] [ 51.501185] Memory state around the buggy address: [ 51.506109] ffff8881c76c4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.513471] ffff8881c76c4c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.521084] >ffff8881c76c4d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.528434] ^ [ 51.534319] ffff8881c76c4d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.541668] ffff8881c76c4e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.549019] ================================================================== [ 51.556376] Disabling lock debugging due to kernel taint [ 51.561952] Kernel panic - not syncing: panic_on_warn set ... [ 51.567852] CPU: 0 PID: 3747 Comm: syz-executor4 Tainted: G B 5.8.0-syzkaller #0 [ 51.577652] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.585237] ntfs: (device loop1): is_boot_sector_ntfs(): Invalid end of sector marker. [ 51.587034] Call Trace: [ 51.587053] dump_stack+0x1a2/0x21e [ 51.587068] panic+0x2e3/0x772 [ 51.587084] ? __warn_printk+0xf3/0xf3 [ 51.604441] ntfs: (device loop1): ntfs_attr_find(): Inode is corrupt. Run chkdsk. [ 51.604501] ? trace_hardirqs_on+0x5e/0x1f0 [ 51.608416] ntfs: (device loop1): ntfs_read_inode_mount(): Failed to lookup attribute list attribute. You should run chkdsk. [ 51.616067] ? trace_hardirqs_on+0x5e/0x1f0 [ 51.616081] ? ntfs_attr_find+0x9b8/0xae0 [ 51.616094] end_report+0x51/0x59 [ 51.616108] kasan_report.cold+0xe/0x37 [ 51.620428] ntfs: (device loop1): ntfs_read_inode_mount(): Failed. Marking inode as bad. [ 51.631742] ? __alloc_pages_nodemask+0x520/0x800 [ 51.631755] ? ntfs_attr_find+0x9b8/0xae0 [ 51.631771] __asan_report_load_n_noabort+0xf/0x20 [ 51.636097] ntfs: (device loop1): ntfs_fill_super(): Failed to load essential metadata. [ 51.640370] ntfs_attr_find+0x9b8/0xae0 [ 51.640385] ntfs_attr_lookup+0x118f/0x22e0 [ 51.640399] ? mark_held_locks+0xa6/0xf0 [ 51.691429] ? ntfs_attr_get_search_ctx+0x46/0x200 [ 51.696346] ? ntfs_attr_reinit_search_ctx+0x3e0/0x3e0 [ 51.701603] ? kmem_cache_alloc+0x2f5/0x380 [ 51.705934] ntfs_read_inode_mount+0x72d/0x22f0 [ 51.710597] ntfs_fill_super+0x1825/0x96a0 [ 51.714815] ? load_and_init_usnjrnl+0x1070/0x1070 [ 51.719732] ? snprintf+0xbb/0xf0 [ 51.723191] ? vsprintf+0x40/0x40 [ 51.726638] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 51.731650] ? set_blocksize+0x1d3/0x420 [ 51.735711] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.741245] mount_bdev+0x331/0x3f0 [ 51.744866] ? load_and_init_usnjrnl+0x1070/0x1070 [ 51.749804] ntfs_mount+0x35/0x40 [ 51.753252] ? ntfs_rl_punch_nolock+0x1d00/0x1d00 [ 51.765561] legacy_get_tree+0x10c/0x220 [ 51.769626] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.775176] vfs_get_tree+0x93/0x300 [ 51.778899] path_mount+0x1439/0x21b0 [ 51.782697] ? copy_mount_string+0x40/0x40 [ 51.786931] ? getname_flags.part.0+0x1e0/0x4f0 [ 51.791600] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.797142] ? user_path_at_empty+0xd8/0x120 [ 51.801543] __x64_sys_mount+0x2b8/0x340 [ 51.805619] ? copy_mnt_ns+0xa60/0xa60 [ 51.809505] do_syscall_64+0x38/0x90 [ 51.812715] ntfs: (device loop3): ntfs_attr_find(): Inode is corrupt. Run chkdsk. [ 51.813209] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.813219] RIP: 0033:0x457e6a [ 51.813234] Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 5d 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 3a 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 51.813245] RSP: 002b:00007f05b938dbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 51.821014] ntfs: (device loop3): ntfs_read_inode_mount(): Failed to lookup attribute list attribute. You should run chkdsk. [ 51.826125] RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457e6a [ 51.826133] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f05b938dc00 [ 51.826141] RBP: 0000000000000002 R08: 000000002007e200 R09: 0000000020000000 [ 51.826149] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 [ 51.826156] R13: 000000000000066c R14: 00000000006fcac0 R15: 0000000000000000 [ 51.829668] Kernel Offset: disabled [ 51.907409] Rebooting in 86400 seconds..