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BUG: KASAN: slab-out-of-bounds in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
BUG: KASAN: slab-out-of-bounds in __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054
Read of size 4 at addr ffff888032f4c2b8 by task syz-executor/6631

CPU: 1 UID: 0 PID: 6631 Comm: syz-executor Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
 __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054
 ocfs2_flush_truncate_log+0x4f/0x70 fs/ocfs2/alloc.c:6076
 ocfs2_sync_fs+0x125/0x390 fs/ocfs2/super.c:402
 sync_filesystem+0x1c8/0x230 fs/sync.c:66
 generic_shutdown_super+0x72/0x2d0 fs/super.c:621
 kill_block_super+0x44/0x90 fs/super.c:1710
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f638c57f327
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc47ef17e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f638c57f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc47ef18a0
RBP: 00007ffc47ef18a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc47ef2920
R13: 00007f638c5f0134 R14: 000000000001c6bc R15: 00007ffc47ef2960
 </TASK>

Allocated by task 6631:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4141
 __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624
 kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700
 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034
 sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:76 [inline]
 internal_create_group+0x7a7/0x11d0 fs/sysfs/group.c:180
 internal_create_groups fs/sysfs/group.c:220 [inline]
 sysfs_create_groups+0x56/0x120 fs/sysfs/group.c:246
 device_add_groups drivers/base/core.c:2819 [inline]
 device_add_attrs+0xe5/0x600 drivers/base/core.c:2883
 device_add+0x576/0xbf0 drivers/base/core.c:3626
 netdev_register_kobject+0x17e/0x310 net/core/net-sysfs.c:2139
 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10495
 register_netdev+0x3b/0x50 net/core/dev.c:10632
 ip6gre_init_net+0x225/0x310 net/ipv6/ip6_gre.c:1629
 ops_init+0x31e/0x590 net/core/net_namespace.c:139
 setup_net+0x287/0x9e0 net/core/net_namespace.c:356
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
 ksys_unshare+0x57d/0xa70 kernel/fork.c:3313
 __do_sys_unshare kernel/fork.c:3384 [inline]
 __se_sys_unshare kernel/fork.c:3382 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3382
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888032f4c1e0
 which belongs to the cache kernfs_node_cache of size 176
The buggy address is located 40 bytes to the right of
 allocated 176-byte region [ffff888032f4c1e0, ffff888032f4c290)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32f4c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801c6c5140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000110011 00000001f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6631, tgid 6631 (syz-executor), ts 107281127597, free_ts 107280736097
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x363e/0x3790 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 alloc_slab_page+0x6a/0x140 mm/slub.c:2412
 allocate_slab+0x5a/0x2f0 mm/slub.c:2578
 new_slab mm/slub.c:2631 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
 __slab_alloc+0x58/0xa0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141
 __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624
 kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700
 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034
 sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:76 [inline]
 internal_create_group+0x7a7/0x11d0 fs/sysfs/group.c:180
 internal_create_groups fs/sysfs/group.c:220 [inline]
 sysfs_create_groups+0x56/0x120 fs/sysfs/group.c:246
 device_add_groups drivers/base/core.c:2819 [inline]
 device_add_attrs+0xe5/0x600 drivers/base/core.c:2883
page last free pid 6631 tgid 6631 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xded/0x1130 mm/page_alloc.c:2657
 skb_free_frag include/linux/skbuff.h:3399 [inline]
 skb_free_head net/core/skbuff.c:1096 [inline]
 skb_release_data+0x6dc/0x8a0 net/core/skbuff.c:1125
 skb_release_all net/core/skbuff.c:1190 [inline]
 __kfree_skb net/core/skbuff.c:1204 [inline]
 sk_skb_reason_drop+0x1c9/0x380 net/core/skbuff.c:1242
 kfree_skb_reason include/linux/skbuff.h:1262 [inline]
 kfree_skb include/linux/skbuff.h:1271 [inline]
 napi_free_frags include/linux/netdevice.h:3905 [inline]
 napi_get_frags_check+0x65/0x90 net/core/skbuff.c:306
 netif_napi_add_weight+0x898/0xc30 net/core/dev.c:6676
 netif_napi_add include/linux/netdevice.h:2638 [inline]
 gro_cells_init+0x192/0x200 net/core/gro_cells.c:85
 ip6gre_tunnel_init_common+0xef/0xa80 net/ipv6/ip6_gre.c:1508
 ip6gre_tunnel_init+0x1e/0x150 net/ipv6/ip6_gre.c:1538
 register_netdevice+0x6d7/0x1b00 net/core/dev.c:10422
 register_netdev+0x3b/0x50 net/core/dev.c:10632
 ip6gre_init_net+0x225/0x310 net/ipv6/ip6_gre.c:1629
 ops_init+0x31e/0x590 net/core/net_namespace.c:139
 setup_net+0x287/0x9e0 net/core/net_namespace.c:356
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228

Memory state around the buggy address:
 ffff888032f4c180: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00
 ffff888032f4c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888032f4c280: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
                                        ^
 ffff888032f4c300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888032f4c380: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
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