and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
XFS (loop0): Mounting V5 Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791
==================================================================
BUG: KASAN: slab-out-of-bounds in crc32c_arch lib/crc/x86/crc32.h:90 [inline]
BUG: KASAN: slab-out-of-bounds in crc32c+0xcd/0x480 lib/crc/crc32-main.c:86
Read of size 8 at addr ffff888046df6200 by task syz.0.17/6560

CPU: 0 UID: 0 PID: 6560 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 crc32c_arch lib/crc/x86/crc32.h:90 [inline]
 crc32c+0xcd/0x480 lib/crc/crc32-main.c:86
 xlog_cksum+0x91/0xf0 fs/xfs/xfs_log.c:1588
 xlog_recover_process+0x90/0x2f0 fs/xfs/xfs_log_recover.c:2899
 xlog_do_recovery_pass+0x9cd/0xc30 fs/xfs/xfs_log_recover.c:3249
 xlog_verify_head+0x136/0x440 fs/xfs/xfs_log_recover.c:1058
 xlog_find_tail+0x5b4/0x830 fs/xfs/xfs_log_recover.c:1315
 xlog_recover+0x4b/0x3e0 fs/xfs/xfs_log_recover.c:3433
 xfs_log_mount+0x253/0x3e0 fs/xfs/xfs_log.c:667
 xfs_mountfs+0xe5e/0x22c0 fs/xfs/xfs_mount.c:1031
 xfs_fs_fill_super+0x1185/0x15d0 fs/xfs/xfs_super.c:1957
 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0300dc034a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0300425e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0300425ef0 RCX: 00007f0300dc034a
RDX: 0000200000000500 RSI: 0000200000000200 RDI: 00007f0300425eb0
RBP: 0000200000000500 R08: 00007f0300425ef0 R09: 0000000002218a5d
R10: 0000000002218a5d R11: 0000000000000246 R12: 0000200000000200
R13: 00007f0300425eb0 R14: 00000000000096bf R15: 0000200000000380
 </TASK>

Allocated by task 6560:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __do_kmalloc_node mm/slub.c:5642 [inline]
 __kvmalloc_node_noprof+0x3fd/0x920 mm/slub.c:7100
 xlog_do_recovery_pass+0x106/0xc30 fs/xfs/xfs_log_recover.c:3030
 xlog_verify_head+0x136/0x440 fs/xfs/xfs_log_recover.c:1058
 xlog_find_tail+0x5b4/0x830 fs/xfs/xfs_log_recover.c:1315
 xlog_recover+0x4b/0x3e0 fs/xfs/xfs_log_recover.c:3433
 xfs_log_mount+0x253/0x3e0 fs/xfs/xfs_log.c:667
 xfs_mountfs+0xe5e/0x22c0 fs/xfs/xfs_mount.c:1031
 xfs_fs_fill_super+0x1185/0x15d0 fs/xfs/xfs_super.c:1957
 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888046df6000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
 allocated 512-byte region [ffff888046df6000, ffff888046df6200)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x46df4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813ff26c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88813ff26c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 0080000000000002 ffffea00011b7d01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5902, tgid 5902 (syz-executor), ts 98500222769, free_ts 91905063867
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3055 [inline]
 allocate_slab+0x96/0x350 mm/slub.c:3228
 new_slab mm/slub.c:3282 [inline]
 ___slab_alloc+0xb12/0x13f0 mm/slub.c:4651
 __slab_alloc+0xc6/0x1f0 mm/slub.c:4770
 __slab_alloc_node mm/slub.c:4846 [inline]
 slab_alloc_node mm/slub.c:5268 [inline]
 __do_kmalloc_node mm/slub.c:5641 [inline]
 __kmalloc_noprof+0x14b/0x7d0 mm/slub.c:5654
 kmalloc_noprof include/linux/slab.h:961 [inline]
 kzalloc_noprof include/linux/slab.h:1094 [inline]
 fib6_info_alloc+0x30/0xf0 net/ipv6/ip6_fib.c:155
 ip6_route_net_init+0x85/0x7a0 net/ipv6/route.c:6654
 ops_init+0x35c/0x5c0 net/core/net_namespace.c:137
 setup_net+0xfe/0x320 net/core/net_namespace.c:445
 copy_net_ns+0x34e/0x4e0 net/core/net_namespace.c:580
 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218
 ksys_unshare+0x4c8/0x8c0 kernel/fork.c:3129
page last free pid 5845 tgid 5845 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xfb6/0x1140 mm/page_alloc.c:2906
 vfree+0x2ad/0x470 mm/vmalloc.c:3440
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x2e/0x60 kernel/kcov.c:535
 __fput+0x45b/0xa80 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x125d/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888046df6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888046df6180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888046df6200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff888046df6280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888046df6300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================