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BUG: KASAN: slab-out-of-bounds in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
BUG: KASAN: slab-out-of-bounds in cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
BUG: KASAN: slab-out-of-bounds in unaccount_page_cache_page+0x99f/0xa80 mm/filemap.c:175
Read of size 4 at addr ffff88816e460470 by task syz-executor.2/18023

CPU: 1 PID: 18023 Comm: syz-executor.2 Not tainted 5.10.199-syzkaller-00307-gd30b996835c0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
 cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
 unaccount_page_cache_page+0x99f/0xa80 mm/filemap.c:175
 __delete_from_page_cache+0xd0/0x5d0 mm/filemap.c:243
 __remove_mapping+0x567/0x690 mm/vmscan.c:978
 shrink_page_list+0x1f38/0x4c60 mm/vmscan.c:1491
 shrink_inactive_list+0x591/0x1150 mm/vmscan.c:2068
 shrink_list mm/vmscan.c:2287 [inline]
 shrink_lruvec+0xced/0x3860 mm/vmscan.c:5466
 shrink_node_memcgs mm/vmscan.c:5653 [inline]
 shrink_node+0xdf3/0x1fb0 mm/vmscan.c:5683
 shrink_zones mm/vmscan.c:5886 [inline]
 do_try_to_free_pages+0x67e/0x15e0 mm/vmscan.c:5944
 try_to_free_mem_cgroup_pages+0x369/0x830 mm/vmscan.c:6262
 try_charge+0x4b8/0x15f0 mm/memcontrol.c:2742
 __mem_cgroup_charge+0x147/0x6e0 mm/memcontrol.c:6847
 mem_cgroup_charge include/linux/memcontrol.h:458 [inline]
 __add_to_page_cache_locked+0x29d/0xba0 mm/filemap.c:854
 add_to_page_cache_lru+0x117/0x2c0 mm/filemap.c:948
 pagecache_get_page+0x71e/0x950 mm/filemap.c:1859
 grab_cache_page_write_begin+0x5d/0xa0 mm/filemap.c:3459
 ext4_da_write_begin+0x587/0xf60 fs/ext4/inode.c:3055
 generic_perform_write+0x2cd/0x570 mm/filemap.c:3509
 ext4_buffered_write_iter+0x482/0x610 fs/ext4/file.c:271
 ext4_file_write_iter+0x193/0x1c80 fs/ext4/file.c:685
 __kernel_write+0x5ab/0x9d0 fs/read_write.c:550
 dump_emit+0x261/0x3a0 fs/coredump.c:849
 dump_user_range+0x71/0x1a0 fs/coredump.c:902
 elf_core_dump+0x33bd/0x3c10 fs/binfmt_elf.c:2287
 do_coredump+0x1eb8/0x2d60 fs/coredump.c:811
 get_signal+0x102c/0x1410 kernel/signal.c:2768
 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x5a/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 exc_page_fault+0x33d/0x5b0 arch/x86/mm/fault.c:1521
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0033:0x10000
Code: Unable to access opcode bytes at RIP 0xffd6.
RSP: 002b:0000000020000008 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f576830f050 RCX: 00007f57681efae9
RDX: 0000000020000240 RSI: 0000000020000000 RDI: 0000000000000080
RBP: 00007f576823b47a R08: 00000000200002c0 R09: 00000000200002c0
R10: 0000000020000280 R11: 0000000000000202 R12: 0000000000000000
R13: 000000000000000b R14: 00007f576830f050 R15: 00007fffd23e75e8

Allocated by task 12298:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
 kmem_cache_zalloc include/linux/slab.h:654 [inline]
 __kernfs_new_node+0xdb/0x700 fs/kernfs/dir.c:635
 kernfs_new_node+0x97/0x170 fs/kernfs/dir.c:699
 __kernfs_create_file+0x4a/0x270 fs/kernfs/file.c:985
 sysfs_add_file_mode_ns+0x273/0x320 fs/sysfs/file.c:306
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x573/0xf00 fs/sysfs/group.c:149
 sysfs_create_group+0x1f/0x30 fs/sysfs/group.c:175
 br_sysfs_addbr+0x29/0x140 net/bridge/br_sysfs_br.c:958
 br_device_event+0x125/0x7c0 net/bridge/br.c:46
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2054 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2066 [inline]
 call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2080
 register_netdevice+0x1066/0x13f0 net/core/dev.c:10059
 br_dev_newlink+0x27/0x110 net/bridge/br_netlink.c:1370
 __rtnl_newlink net/core/rtnetlink.c:3479 [inline]
 rtnl_newlink+0x1516/0x2000 net/core/rtnetlink.c:3527
 rtnetlink_rcv_msg+0x955/0xc50 net/core/rtnetlink.c:5608
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2497
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5626
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0xa46/0xd00 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2374
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2428
 __sys_sendmsg net/socket.c:2457 [inline]
 __do_sys_sendmsg net/socket.c:2466 [inline]
 __se_sys_sendmsg+0x1b1/0x280 net/socket.c:2464
 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2464
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

The buggy address belongs to the object at ffff88816e4603e8
 which belongs to the cache kernfs_node_cache of size 136
The buggy address is located 0 bytes to the right of
 136-byte region [ffff88816e4603e8, ffff88816e460470)
The buggy address belongs to the page:
page:ffffea0005b91800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e460
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea00041a6400 0000000400000004 ffff888100192600
raw: 0000000000000000 0000000000140014 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 12126, ts 1498600296461, free_ts 1498595131460
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5346
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x1b9/0x2e0 mm/slub.c:2960
 kmem_cache_zalloc include/linux/slab.h:654 [inline]
 __kernfs_new_node+0xdb/0x700 fs/kernfs/dir.c:635
 kernfs_new_node+0x97/0x170 fs/kernfs/dir.c:699
 __kernfs_create_file+0x4a/0x270 fs/kernfs/file.c:985
 sysfs_add_file_mode_ns+0x273/0x320 fs/sysfs/file.c:306
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x573/0xf00 fs/sysfs/group.c:149
 internal_create_groups fs/sysfs/group.c:189 [inline]
 sysfs_create_groups+0x5b/0x130 fs/sysfs/group.c:215
 device_add_groups drivers/base/core.c:2346 [inline]
 device_add_attrs+0x8b/0x3e0 drivers/base/core.c:2494
 device_add+0x4da/0xbc0 drivers/base/core.c:3206
 netdev_register_kobject+0x177/0x320 net/core/net-sysfs.c:1997
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5405
 __free_pages+0x67/0xc0 mm/page_alloc.c:5416
 free_pages+0x7c/0x90 mm/page_alloc.c:5427
 __dev_alloc_name net/core/dev.c:1229 [inline]
 dev_alloc_name_ns+0x8f7/0x9f0 net/core/dev.c:1251
 dev_get_valid_name+0x1b0/0x310 net/core/dev.c:1286
 register_netdevice+0x1d1/0x13f0 net/core/dev.c:9947
 __ip_tunnel_create+0x2b0/0x370 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x28d/0x750 net/ipv4/ip_tunnel.c:1069
 ipgre_init_net+0x24/0x30 net/ipv4/ip_gre.c:1021
 ops_init+0x1cf/0x4a0 net/core/net_namespace.c:141
 setup_net+0x367/0xbf0 net/core/net_namespace.c:342
 copy_net_ns+0x331/0x520 net/core/net_namespace.c:483
 create_new_namespaces+0x410/0x660 kernel/nsproxy.c:110
 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179
 copy_process+0x11a0/0x3340 kernel/fork.c:2186

Memory state around the buggy address:
 ffff88816e460300: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88816e460380: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00
>ffff88816e460400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
                                                             ^
 ffff88816e460480: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00
 ffff88816e460500: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00
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