================================================================== 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+0x6d8/0x750 mm/filemap.c:163 Read of size 4 at addr ffff88810df0f470 by task syz-executor.2/13016 CPU: 0 PID: 13016 Comm: syz-executor.2 Tainted: G W 5.15.131-syzkaller-00653-gea586874d2f9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 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+0x6d8/0x750 mm/filemap.c:163 __delete_from_page_cache+0xc6/0x5b0 mm/filemap.c:231 __remove_mapping+0x566/0x690 mm/vmscan.c:1200 shrink_page_list+0x2723/0x5c50 mm/vmscan.c:1797 shrink_inactive_list mm/vmscan.c:2304 [inline] shrink_list mm/vmscan.c:2549 [inline] shrink_lruvec+0x17ec/0x4580 mm/vmscan.c:5752 shrink_node_memcgs mm/vmscan.c:5944 [inline] shrink_node+0x1077/0x24e0 mm/vmscan.c:5974 shrink_zones mm/vmscan.c:6177 [inline] do_try_to_free_pages+0x5b6/0x1570 mm/vmscan.c:6235 try_to_free_mem_cgroup_pages+0x36c/0x850 mm/vmscan.c:6549 try_charge_memcg+0x48f/0x1550 mm/memcontrol.c:2686 try_charge mm/memcontrol.c:2811 [inline] charge_memcg+0x6b/0x1a0 mm/memcontrol.c:6813 __mem_cgroup_charge+0x37/0x130 mm/memcontrol.c:6849 mem_cgroup_charge include/linux/memcontrol.h:710 [inline] __add_to_page_cache_locked+0x2d1/0xa20 mm/filemap.c:892 add_to_page_cache_lru+0x11b/0x2c0 mm/filemap.c:984 pagecache_get_page+0xbe1/0xeb0 mm/filemap.c:1951 grab_cache_page_write_begin+0x5d/0xa0 mm/filemap.c:3787 ext4_da_write_begin+0x5ae/0xc30 fs/ext4/inode.c:3003 generic_perform_write+0x2bc/0x5a0 mm/filemap.c:3833 ext4_buffered_write_iter+0x48a/0x610 fs/ext4/file.c:270 ext4_file_write_iter+0x443/0x1c80 __kernel_write+0x5ab/0xa60 fs/read_write.c:539 __dump_emit+0x261/0x3a0 fs/coredump.c:875 dump_emit+0x381/0x3f0 fs/coredump.c:912 dump_user_range+0x86/0x1c0 fs/coredump.c:949 elf_core_dump+0x3663/0x3e80 fs/binfmt_elf.c:2285 do_coredump+0x1834/0x3050 fs/coredump.c:826 get_signal+0x4c8/0x1630 kernel/signal.c:2877 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:314 irqentry_exit+0x12/0x40 kernel/entry/common.c:405 exc_general_protection+0x327/0x4b0 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x27/0x30 arch/x86/include/asm/idtentry.h:562 RIP: 0033:0x7fd776fbfaf1 Code: 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 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000020000030 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fd7770df050 RCX: 00007fd776fbfae9 RDX: 0000000020000040 RSI: 0000000020000030 RDI: 0000000000002000 RBP: 00007fd77700b47a R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000080 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd7770df050 R15: 00007ffc8a2fcd88 Allocated by task 12830: 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+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x115/0x210 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] copy_mount_options fs/namespace.c:3202 [inline] __do_sys_mount fs/namespace.c:3540 [inline] __se_sys_mount+0x156/0x3b0 fs/namespace.c:3522 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522 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 The buggy address belongs to the object at ffff88810df0e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1136 bytes to the right of 4096-byte region [ffff88810df0e000, ffff88810df0f000) The buggy address belongs to the page: page:ffffea000437c200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88810df0a000 pfn:0x10df08 head:ffffea000437c200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0005d9a008 ffffea00049e3e08 ffff888100043380 raw: ffff88810df0a000 0000000000040002 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 19170, ts 731358243638, free_ts 731206913782 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2602 prep_new_page+0x1b/0x110 mm/page_alloc.c:2608 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4482 __alloc_pages+0x206/0x5e0 mm/page_alloc.c:5773 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] __kmalloc_track_caller+0x16c/0x260 mm/slub.c:4945 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x10c/0x550 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] rtmsg_ifinfo_build_skb+0x7f/0x180 net/core/rtnetlink.c:3863 rtmsg_ifinfo_event net/core/rtnetlink.c:3899 [inline] rtmsg_ifinfo+0x78/0x120 net/core/rtnetlink.c:3908 __dev_notify_flags+0xdd/0x610 net/core/dev.c:8828 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8870 do_setlink+0xcd1/0x3ae0 net/core/rtnetlink.c:2741 __rtnl_newlink net/core/rtnetlink.c:3429 [inline] rtnl_newlink+0x1779/0x2050 net/core/rtnetlink.c:3549 rtnetlink_rcv_msg+0x951/0xc40 net/core/rtnetlink.c:5630 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1469 [inline] free_pcp_prepare mm/page_alloc.c:1541 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3531 free_unref_page+0xe6/0x730 mm/page_alloc.c:3613 free_the_page mm/page_alloc.c:802 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5849 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3388 do_slab_free mm/slub.c:3507 [inline] ___cache_free+0x109/0x120 mm/slub.c:3526 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 sock_alloc_inode+0x1b/0xb0 net/socket.c:303 alloc_inode fs/inode.c:236 [inline] new_inode_pseudo+0x64/0x220 fs/inode.c:937 Memory state around the buggy address: ffff88810df0f300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810df0f380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88810df0f400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88810df0f480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810df0f500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================