================================================================== 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+0x6f2/0x760 mm/filemap.c:172 Read of size 4 at addr ffff88812a777470 by task kswapd0/46 CPU: 0 PID: 46 Comm: kswapd0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 __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+0x6f2/0x760 mm/filemap.c:172 __delete_from_page_cache+0xbe/0x420 mm/filemap.c:240 __remove_mapping+0x60b/0x930 mm/vmscan.c:1216 shrink_page_list+0x2778/0x5040 mm/vmscan.c:1824 shrink_inactive_list mm/vmscan.c:2331 [inline] shrink_list mm/vmscan.c:2576 [inline] shrink_lruvec+0x10f3/0x36a0 mm/vmscan.c:5793 shrink_node_memcgs mm/vmscan.c:5985 [inline] shrink_node+0x11e9/0x2a70 mm/vmscan.c:6015 kswapd_shrink_node mm/vmscan.c:6766 [inline] balance_pgdat+0xfba/0x2150 mm/vmscan.c:6956 kswapd+0x649/0xcf0 mm/vmscan.c:7215 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 13176: 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:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x119/0x270 mm/slub.c:3274 kmalloc include/linux/slab.h:619 [inline] kzalloc include/linux/slab.h:750 [inline] new_nbp+0x218/0x700 net/bridge/br_if.c:422 br_add_if+0x29d/0x10b0 net/bridge/br_if.c:610 br_add_slave+0x2c/0x40 net/bridge/br_device.c:387 do_set_master net/core/rtnetlink.c:2575 [inline] do_setlink+0xd6b/0x3990 net/core/rtnetlink.c:2786 __rtnl_newlink net/core/rtnetlink.c:3450 [inline] rtnl_newlink+0x13fa/0x17b0 net/core/rtnetlink.c:3572 rtnetlink_rcv_msg+0x9e4/0xb90 net/core/rtnetlink.c:5650 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x876/0xa40 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x86a/0xb70 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x423/0x580 net/socket.c:2063 __do_sys_sendto net/socket.c:2075 [inline] __se_sys_sendto net/socket.c:2071 [inline] __x64_sys_sendto+0xe5/0x100 net/socket.c:2071 x64_sys_call+0x178/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88812a777000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 112 bytes to the right of 1024-byte region [ffff88812a777000, ffff88812a777400) The buggy address belongs to the page: page:ffffea0004a9dc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12a770 head:ffffea0004a9dc00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6993, ts 340655752641, free_ts 340648298693 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x21a/0x740 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_rt_notify+0x287/0x470 net/ipv6/route.c:6173 fib6_add_rt2node net/ipv6/ip6_fib.c:1255 [inline] fib6_add+0x2279/0x3d10 net/ipv6/ip6_fib.c:1484 __ip6_ins_rt net/ipv6/route.c:1308 [inline] ip6_route_add+0x89/0x130 net/ipv6/route.c:3884 addrconf_prefix_route net/ipv6/addrconf.c:2468 [inline] addrconf_add_linklocal+0x3cf/0x620 net/ipv6/addrconf.c:3264 addrconf_addr_gen+0x48b/0x5b0 net/ipv6/addrconf.c:3393 addrconf_init_auto_addrs+0x842/0xb90 net/ipv6/addrconf.c:-1 addrconf_notify+0x95d/0xde0 net/ipv6/addrconf.c:3686 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5884 __free_slab+0xe8/0x1e0 mm/slub.c:2025 free_slab mm/slub.c:2040 [inline] discard_slab mm/slub.c:2046 [inline] __unfreeze_partials+0x160/0x190 mm/slub.c:2532 put_cpu_partial+0xc6/0x120 mm/slub.c:2612 __slab_free+0x1d4/0x290 mm/slub.c:3395 do_slab_free mm/slub.c:3514 [inline] ___cache_free+0x104/0x120 mm/slub.c:3535 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260 kmem_cache_alloc_node include/linux/slab.h:492 [inline] __alloc_skb+0xe0/0x740 net/core/skbuff.c:416 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] netlink_ack+0x3a6/0xb60 net/netlink/af_netlink.c:2446 Memory state around the buggy address: ffff88812a777300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812a777380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88812a777400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88812a777480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812a777500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================