loop1: detected capacity change from 0 to 256 Oops: divide error: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 9708 Comm: repro.out Not tainted 6.18.0-rc6 #22 PREEMPT(full) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:exfat_allocate_bitmap fs/exfat/balloc.c:109 [inline] RIP: 0010:exfat_load_bitmap+0x69d/0x10c0 fs/exfat/balloc.c:159 Code: 24 78 45 31 ff 48 89 44 24 28 48 c1 e8 03 48 89 84 24 88 00 00 00 4c 89 e8 48 c1 e8 03 48 89 84 24 80 00 00 00 44 89 f8 31 d2 74 24 30 41 89 d6 31 ff 89 d6 e8 e3 b0 24 ff 45 85 f6 4c 89 fb RSP: 0018:ffffc90011b9f860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90011b9fa10 R08: 0000000000000cc0 R09: 00000000ffffffff R10: 000000000000000b R11: ffffffff81c646c6 R12: dffffc0000000000 R13: ffff8880522d8018 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000010746300(0000) GS:ffff8880ec992000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bf938 CR3: 000000001c7c6000 CR4: 0000000000752ef0 PKRU: 55555554 Call Trace: __exfat_fill_super fs/exfat/super.c:623 [inline] exfat_fill_super+0x12c6/0x29c0 fs/exfat/super.c:668 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2b0 fs/super.c:1751 fc_mount fs/namespace.c:1208 [inline] do_new_mount_fc fs/namespace.c:3651 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3727 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4215 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x45234a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd5246d6f8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000045234a RDX: 0000000020001500 RSI: 0000000020001540 RDI: 00007ffd5246d840 RBP: 00007ffd5246d8d0 R08: 00007ffd5246d740 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000409da0 R13: 0000000000000000 R14: 00000000004bd018 R15: 00000000004004a0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:exfat_allocate_bitmap fs/exfat/balloc.c:109 [inline] RIP: 0010:exfat_load_bitmap+0x69d/0x10c0 fs/exfat/balloc.c:159 Code: 24 78 45 31 ff 48 89 44 24 28 48 c1 e8 03 48 89 84 24 88 00 00 00 4c 89 e8 48 c1 e8 03 48 89 84 24 80 00 00 00 44 89 f8 31 d2 74 24 30 41 89 d6 31 ff 89 d6 e8 e3 b0 24 ff 45 85 f6 4c 89 fb RSP: 0018:ffffc90011b9f860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90011b9fa10 R08: 0000000000000cc0 R09: 00000000ffffffff R10: 000000000000000b R11: ffffffff81c646c6 R12: dffffc0000000000 R13: ffff8880522d8018 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000010746300(0000) GS:ffff8880ec992000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bf938 CR3: 000000001c7c6000 CR4: 0000000000752ef0 PKRU: 55555554 ---------------- Code disassembly (best guess): 0: 24 78 and $0x78,%al 2: 45 31 ff xor %r15d,%r15d 5: 48 89 44 24 28 mov %rax,0x28(%rsp) a: 48 c1 e8 03 shr $0x3,%rax e: 48 89 84 24 88 00 00 mov %rax,0x88(%rsp) 15: 00 16: 4c 89 e8 mov %r13,%rax 19: 48 c1 e8 03 shr $0x3,%rax 1d: 48 89 84 24 80 00 00 mov %rax,0x80(%rsp) 24: 00 25: 44 89 f8 mov %r15d,%eax 28: 31 d2 xor %edx,%edx * 2a: f7 74 24 30 divl 0x30(%rsp) <-- trapping instruction 2e: 41 89 d6 mov %edx,%r14d 31: 31 ff xor %edi,%edi 33: 89 d6 mov %edx,%esi 35: e8 e3 b0 24 ff call 0xff24b11d 3a: 45 85 f6 test %r14d,%r14d 3d: 4c 89 fb mov %r15,%rbx