exFAT-fs (loop0): failed to load upcase table (idx : 0x00000c00, chksum : 0x00000000, utbl_chksum : 0xe619d30d) ================================================================== BUG: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365 CPU: 1 PID: 365 Comm: syz-executor251 Not tainted 5.10.109-syzkaller-00693-g414e6c8e941c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181 __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217 exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243 exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339 notify_change+0xb76/0xe10 fs/attr.c:336 do_truncate+0x1ea/0x2d0 fs/open.c:65 handle_truncate fs/namei.c:2989 [inline] do_open fs/namei.c:3331 [inline] path_openat+0x294e/0x2fd0 fs/namei.c:3444 do_filp_open+0x200/0x440 fs/namei.c:3471 do_sys_openat2+0x13b/0x470 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd02eed02d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ffcafe06f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fd02eed02d9 RDX: 00007fd02eed02d9 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fd02ee8fb70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd02ee8fc00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 365: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:507 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:269 [inline] __kmalloc+0x1f7/0x360 mm/slub.c:4042 kmalloc_array include/linux/slab.h:592 [inline] exfat_allocate_bitmap fs/exfat/balloc.c:72 [inline] exfat_load_bitmap+0x511/0xae0 fs/exfat/balloc.c:120 __exfat_fill_super fs/exfat/super.c:595 [inline] exfat_fill_super+0x1101/0x2ab0 fs/exfat/super.c:645 get_tree_bdev+0x417/0x640 fs/super.c:1344 exfat_get_tree+0x1c/0x20 fs/exfat/super.c:717 vfs_get_tree+0x88/0x290 fs/super.c:1549 do_new_mount+0x289/0xad0 fs/namespace.c:2899 path_mount+0x58d/0xce0 fs/namespace.c:3229 do_mount fs/namespace.c:3242 [inline] __do_sys_mount fs/namespace.c:3450 [inline] __se_sys_mount+0x2d2/0x3c0 fs/namespace.c:3427 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888115aa9500 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of 8-byte region [ffff888115aa9500, ffff888115aa9508) The buggy address belongs to the page: page:ffffea000456aa40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115aa9 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff888100043c80 raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 198, ts 4174522057, free_ts 4174389097 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2385 [inline] prep_new_page mm/page_alloc.c:2391 [inline] get_page_from_freelist+0x745/0x760 mm/page_alloc.c:4063 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5113 alloc_slab_page mm/slub.c:1815 [inline] allocate_slab+0x78/0x540 mm/slub.c:1817 new_slab mm/slub.c:1878 [inline] new_slab_objects mm/slub.c:2637 [inline] ___slab_alloc+0x131/0x2e0 mm/slub.c:2800 __slab_alloc+0x63/0xa0 mm/slub.c:2840 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] __kmalloc+0x24f/0x360 mm/slub.c:4038 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x82/0x130 mm/util.c:580 kvmalloc include/linux/mm.h:822 [inline] kvzalloc include/linux/mm.h:830 [inline] proc_sys_call_handler+0x3d5/0x870 fs/proc/proc_sysctl.c:574 proc_sys_write+0x22/0x30 fs/proc/proc_sysctl.c:617 call_write_iter include/linux/fs.h:1947 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xc1c/0xf40 fs/read_write.c:605 ksys_write+0x198/0x2c0 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1331 [inline] free_pcp_prepare+0x18c/0x1c0 mm/page_alloc.c:1405 free_unref_page_prepare mm/page_alloc.c:3291 [inline] free_unref_page mm/page_alloc.c:3341 [inline] free_the_page mm/page_alloc.c:5172 [inline] __free_pages+0x2e0/0x4a0 mm/page_alloc.c:5180 free_pages+0x7c/0x90 mm/page_alloc.c:5191 selinux_genfs_get_sid+0x209/0x250 security/selinux/hooks.c:1326 inode_doinit_with_dentry+0x858/0x1030 security/selinux/hooks.c:1523 selinux_d_instantiate+0x27/0x40 security/selinux/hooks.c:6351 security_d_instantiate+0xa5/0x100 security/security.c:1948 d_splice_alias+0x71/0x3b0 fs/dcache.c:3029 proc_sys_lookup+0x6d5/0x7e0 fs/proc/proc_sysctl.c:535 lookup_open fs/namei.c:3162 [inline] open_last_lookups fs/namei.c:3253 [inline] path_openat+0x119a/0x2fd0 fs/namei.c:3441 do_filp_open+0x200/0x440 fs/namei.c:3471 do_sys_openat2+0x13b/0x470 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Memory state around the buggy address: ffff888115aa9400: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc ffff888115aa9480: fc fa fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc >ffff888115aa9500: 00 fc fc fc fc 00 fc fc fc fc fa fc fc fc fc 00 ^ ffff888115aa9580: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc ffff888115aa9600: fc fc fc fa fc fc fc fc fc fc fc fc fc fa fc fc ================================================================== general protection fault, probably for non-canonical address 0xf9bffc1cc0000032: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xce0000e600000190-0xce0000e600000197] CPU: 1 PID: 365 Comm: syz-executor251 Tainted: G B 5.10.109-syzkaller-00693-g414e6c8e941c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:exfat_clear_bitmap+0x163/0x490 fs/exfat/balloc.c:174 Code: 80 3c 08 00 74 08 48 89 df e8 39 26 af ff 44 23 75 b0 4c 8b 23 49 83 c4 28 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 0f 26 af ff 41 8d 46 3f 45 85 f6 41 RSP: 0018:ffffc90000bf7420 EFLAGS: 00010a03 RAX: 19c0001cc0000032 RBX: ffff888115aa9508 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000286 RDI: 0000000000000001 RBP: ffffc90000bf7490 R08: ffffffff813efad3 R09: fffffbfff0d85cf9 R10: fffffbfff0d85cf9 R11: 1ffffffff0d85cf8 R12: ce0000e600000195 R13: 1ffff11020eb500c R14: 0000000000000000 R15: 0000000000000008 FS: 0000555557200300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f229b3b0d8 CR3: 00000001077ad000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181 __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217 exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243 exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339 notify_change+0xb76/0xe10 fs/attr.c:336 do_truncate+0x1ea/0x2d0 fs/open.c:65 handle_truncate fs/namei.c:2989 [inline] do_open fs/namei.c:3331 [inline] path_openat+0x294e/0x2fd0 fs/namei.c:3444 do_filp_open+0x200/0x440 fs/namei.c:3471 do_sys_openat2+0x13b/0x470 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd02eed02d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ffcafe06f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fd02eed02d9 RDX: 00007fd02eed02d9 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fd02ee8fb70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd02ee8fc00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace dd7d39fc867eb4c8 ]--- RIP: 0010:exfat_clear_bitmap+0x163/0x490 fs/exfat/balloc.c:174 Code: 80 3c 08 00 74 08 48 89 df e8 39 26 af ff 44 23 75 b0 4c 8b 23 49 83 c4 28 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 0f 26 af ff 41 8d 46 3f 45 85 f6 41 RSP: 0018:ffffc90000bf7420 EFLAGS: 00010a03 RAX: 19c0001cc0000032 RBX: ffff888115aa9508 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000286 RDI: 0000000000000001 RBP: ffffc90000bf7490 R08: ffffffff813efad3 R09: fffffbfff0d85cf9 R10: fffffbfff0d85cf9 R11: 1ffffffff0d85cf8 R12: ce0000e600000195 R13: 1ffff11020eb500c R14: 0000000000000000 R15: 0000000000000008 FS: 0000555557200300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe84dd3e08 CR3: 00000001077ad000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 39 26 af ff callq 0xffaf2647 e: 44 23 75 b0 and -0x50(%rbp),%r14d 12: 4c 8b 23 mov (%rbx),%r12 15: 49 83 c4 28 add $0x28,%r12 19: 4c 89 e0 mov %r12,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 0f 26 af ff callq 0xffaf2647 38: 41 8d 46 3f lea 0x3f(%r14),%eax 3c: 45 85 f6 test %r14d,%r14d 3f: 41 rex.B