FAT-fs (loop5): Directory bread(block 64) failed FAT-fs (loop5): Directory bread(block 65) failed ================================================================== BUG: KASAN: slab-out-of-bounds in find_first_zero_bit+0xa8/0xb0 lib/find_bit.c:125 Read of size 8 at addr ffff8880a89d29c0 by task syz-executor.3/10396 CPU: 1 PID: 10396 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 find_first_zero_bit+0xa8/0xb0 lib/find_bit.c:125 bfs_create+0xfb/0x610 fs/bfs/dir.c:91 FAT-fs (loop5): Directory bread(block 66) failed FAT-fs (loop5): Directory bread(block 67) failed lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 FAT-fs (loop5): Directory bread(block 68) failed FAT-fs (loop5): Directory bread(block 69) failed do_filp_open+0x18c/0x3f0 fs/namei.c:3567 FAT-fs (loop5): Directory bread(block 70) failed FAT-fs (loop5): Directory bread(block 71) failed do_sys_open+0x3b3/0x520 fs/open.c:1085 FAT-fs (loop5): Directory bread(block 72) failed FAT-fs (loop5): Directory bread(block 73) failed do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff8f82400f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff8f67b2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ff8f835ff80 RCX: 00007ff8f82400f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001140 RBP: 00007ff8f829bae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8598bb1f R14: 00007ff8f67b2300 R15: 0000000000022000 Allocated by task 10396: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] kzalloc include/linux/slab.h:709 [inline] bfs_fill_super+0x447/0xec0 fs/bfs/inode.c:363 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 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:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8196: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 free_modprobe_argv+0x51/0x90 kernel/kmod.c:66 call_usermodehelper_freeinfo kernel/umh.c:45 [inline] call_usermodehelper_exec+0x235/0x4d0 kernel/umh.c:590 call_modprobe kernel/kmod.c:99 [inline] __request_module+0x44d/0xb80 kernel/kmod.c:171 dev_load+0x1c2/0x200 net/core/dev_ioctl.c:356 dev_ioctl+0x296/0xc50 net/core/dev_ioctl.c:412 sock_do_ioctl+0x178/0x300 net/socket.c:1038 sock_ioctl+0x2ef/0x5d0 net/socket.c:1135 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a89d29c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a89d29c0, ffff8880a89d29e0) The buggy address belongs to the page: page:ffffea0002a27480 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880a89d2fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002a8bc08 ffffea0002c1f108 ffff88813bff01c0 raw: ffff8880a89d2fc1 ffff8880a89d2000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a89d2880: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc ffff8880a89d2900: 00 01 fc fc fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a89d2980: fb fb fb fb fc fc fc fc 07 fc fc fc fc fc fc fc ^ ffff8880a89d2a00: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a89d2a80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ================================================================== hfsplus: found bad thread record in catalog