XFS (loop2): Invalid superblock magic number ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:193 [inline] BUG: KASAN: use-after-free in lockdep_register_key+0x3b9/0x490 kernel/locking/lockdep.c:1023 Read of size 8 at addr ffff8880a871f6d8 by task syz-executor.2/21968 CPU: 0 PID: 21968 Comm: syz-executor.2 Not tainted 5.0.0+ #10 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __read_once_size include/linux/compiler.h:193 [inline] lockdep_register_key+0x3b9/0x490 kernel/locking/lockdep.c:1023 wq_init_lockdep kernel/workqueue.c:3431 [inline] alloc_workqueue+0x427/0xe70 kernel/workqueue.c:4250 xfs_init_mount_workqueues+0xcb/0x660 fs/xfs/xfs_super.c:841 xfs_fs_fill_super+0x719/0x14f0 fs/xfs/xfs_super.c:1651 mount_bdev+0x307/0x3c0 fs/super.c:1159 xfs_fs_mount+0x35/0x40 fs/xfs/xfs_super.c:1820 mount_fs+0x106/0x3ff fs/super.c:1258 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x581/0x2d30 fs/namespace.c:2845 ksys_mount+0xdb/0x150 fs/namespace.c:3061 __do_sys_mount fs/namespace.c:3075 [inline] __se_sys_mount fs/namespace.c:3072 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3072 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a99a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d 8e 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 0a 8e fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f1954d60a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1954d60b30 RCX: 000000000045a99a RDX: 00007f1954d60ad0 RSI: 0000000020000440 RDI: 00007f1954d60af0 RBP: 0000000020000440 R08: 00007f1954d60b30 R09: 00007f1954d60ad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000004dbee0 R15: 00000000ffffffff Allocated by task 21583: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511 __do_kmalloc mm/slab.c:3726 [inline] __kmalloc+0x15c/0x740 mm/slab.c:3735 kmalloc include/linux/slab.h:550 [inline] load_elf_phdrs+0x157/0x200 fs/binfmt_elf.c:441 load_elf_binary+0x31c/0x53f0 fs/binfmt_elf.c:737 search_binary_handler fs/exec.c:1656 [inline] search_binary_handler+0x17f/0x570 fs/exec.c:1634 exec_binprm fs/exec.c:1698 [inline] __do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 21583: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459 kasan_slab_free+0xe/0x10 mm/kasan/common.c:467 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3821 load_elf_binary+0x24d4/0x53f0 fs/binfmt_elf.c:1118 search_binary_handler fs/exec.c:1656 [inline] search_binary_handler+0x17f/0x570 fs/exec.c:1634 exec_binprm fs/exec.c:1698 [inline] __do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a871f5c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 280 bytes inside of 512-byte region [ffff8880a871f5c0, ffff8880a871f7c0) The buggy address belongs to the page: page:ffffea0002a1c7c0 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0xffff8880a871f840 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00029a35c8 ffffea0002790908 ffff88812c3f0940 raw: ffff8880a871f840 ffff8880a871f0c0 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a871f580: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8880a871f600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880a871f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a871f700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a871f780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================