==================================================================
BUG: KASAN: slab-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline]
BUG: KASAN: slab-out-of-bounds in gfs2_file_direct_write fs/gfs2/file.c:923 [inline]
BUG: KASAN: slab-out-of-bounds in gfs2_file_write_iter+0x872/0xf10 fs/gfs2/file.c:1139
Read of size 8 at addr ffff88808a258100 by task syz-executor.4/9038

CPU: 1 PID: 9038 Comm: syz-executor.4 Not tainted 5.15.130-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 should_fault_in_pages fs/gfs2/file.c:784 [inline]
 gfs2_file_direct_write fs/gfs2/file.c:923 [inline]
 gfs2_file_write_iter+0x872/0xf10 fs/gfs2/file.c:1139
 do_iter_readv_writev+0x594/0x7a0
 do_iter_write+0x1ea/0x760 fs/read_write.c:855
 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe3/0x1c0 fs/splice.c:936
 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891
 do_splice_direct+0x285/0x3d0 fs/splice.c:979
 do_sendfile+0x625/0xff0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1317 [inline]
 __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f04241f3ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04227750c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f0424312f80 RCX: 00007f04241f3ae9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007f042423f47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0424312f80 R15: 00007ffee11223f8
 </TASK>

Allocated by task 9038:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x168/0x300 mm/slub.c:4407
 kmalloc_array include/linux/slab.h:631 [inline]
 kcalloc include/linux/slab.h:660 [inline]
 iter_file_splice_write+0x27b/0xfa0 fs/splice.c:628
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe3/0x1c0 fs/splice.c:936
 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891
 do_splice_direct+0x285/0x3d0 fs/splice.c:979
 do_sendfile+0x625/0xff0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1317 [inline]
 __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Last potentially related work creation:
 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3583
 drop_sysctl_table+0x317/0x460 fs/proc/proc_sysctl.c:1680
 drop_sysctl_table+0x329/0x460 fs/proc/proc_sysctl.c:1683
 unregister_sysctl_table+0x88/0x130 fs/proc/proc_sysctl.c:1718
 __devinet_sysctl_unregister net/ipv4/devinet.c:2600 [inline]
 devinet_sysctl_unregister net/ipv4/devinet.c:2628 [inline]
 inetdev_destroy net/ipv4/devinet.c:324 [inline]
 inetdev_event+0x7ba/0x1490 net/ipv4/devinet.c:1598
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:1998 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2010 [inline]
 call_netdevice_notifiers net/core/dev.c:2024 [inline]
 unregister_netdevice_many+0xf1b/0x18f0 net/core/dev.c:11067
 sit_exit_batch_net+0x43c/0x480 net/ipv6/sit.c:1952
 ops_exit_list net/core/net_namespace.c:174 [inline]
 cleanup_net+0x763/0xb60 net/core/net_namespace.c:596
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Second to last potentially related work creation:
 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:2994 [inline]
 call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3074
 ip_vs_app_inc_release net/netfilter/ipvs/ip_vs_app.c:140 [inline]
 unregister_ip_vs_app+0x2bc/0x410 net/netfilter/ipvs/ip_vs_app.c:242
 ops_exit_list net/core/net_namespace.c:169 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:596
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88808a258000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff88808a258000, ffff88808a258100)
The buggy address belongs to the page:
page:ffffea0002289600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8a258
head:ffffea0002289600 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011c41b40
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3558, ts 287443201400, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 __kmalloc+0x1c9/0x300 mm/slub.c:4403
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 new_dir fs/proc/proc_sysctl.c:954 [inline]
 get_subdir fs/proc/proc_sysctl.c:999 [inline]
 __register_sysctl_table+0x9f1/0x1220 fs/proc/proc_sysctl.c:1348
 neigh_sysctl_register+0x455/0x530 net/core/neighbour.c:3701
 devinet_sysctl_register+0x9d/0x1a0 net/ipv4/devinet.c:2614
 inetdev_init+0x257/0x470 net/ipv4/devinet.c:276
 inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1530
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:1998 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2010 [inline]
 call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2024
 register_netdevice+0x12c2/0x1700 net/core/dev.c:10362
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:317 [inline]
 nsim_create+0x329/0x3e0 drivers/net/netdevsim/netdev.c:365
 __nsim_dev_port_add+0x6de/0xb90 drivers/net/netdevsim/dev.c:1312
 nsim_dev_port_add_all+0x35/0x110 drivers/net/netdevsim/dev.c:1372
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88808a258000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808a258080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88808a258100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88808a258180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808a258200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================