================================================================== 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 ffff88811f201470 by task syz-executor.0/20220 CPU: 1 PID: 20220 Comm: syz-executor.0 Tainted: G W 5.10.209-syzkaller-00001-ge7daca75b4c3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 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:6848 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_general_protection+0x415/0x490 arch/x86/kernel/traps.c:557 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0033:0x7f836b1f3db1 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:00000000200002f0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f836b322050 RCX: 00007f836b1f3da9 RDX: 0000000020000140 RSI: 00000000200002f0 RDI: 0000000004000000 RBP: 00007f836b24047a R08: 00000000200003c0 R09: 00000000200003c0 R10: 0000000020000300 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007f836b322050 R15: 00007ffe43be8d68 Allocated by task 18669: 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_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] kmem_cache_alloc_trace+0x18a/0x2e0 mm/slub.c:2974 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] kvm_arch_vcpu_create+0x295/0x980 arch/x86/kvm/x86.c:10225 kvm_vm_ioctl_create_vcpu+0x304/0x710 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3245 kvm_vm_ioctl+0x27c/0xb10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3809 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 Freed by task 75: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1595 [inline] slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621 slab_free mm/slub.c:3203 [inline] kfree+0xc3/0x270 mm/slub.c:4191 skb_free_head net/core/skbuff.c:605 [inline] skb_release_data+0x5c6/0x6f0 net/core/skbuff.c:625 skb_release_all net/core/skbuff.c:679 [inline] __kfree_skb net/core/skbuff.c:693 [inline] consume_skb+0xac/0x250 net/core/skbuff.c:850 skb_free_datagram+0x28/0xe0 net/core/datagram.c:325 unix_dgram_recvmsg+0xc97/0x1240 net/unix/af_unix.c:2248 sock_recvmsg_nosec net/socket.c:905 [inline] sock_recvmsg net/socket.c:923 [inline] sock_read_iter+0x353/0x480 net/socket.c:996 call_read_iter include/linux/fs.h:2013 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x999/0xbb0 fs/read_write.c:496 ksys_read+0x199/0x2c0 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:642 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 The buggy address belongs to the object at ffff88811f201000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 112 bytes to the right of 1024-byte region [ffff88811f201000, ffff88811f201400) The buggy address belongs to the page: page:ffffea00047c8000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f200 head:ffffea00047c8000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00 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 17250, ts 1277769515151, free_ts 1277755443909 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] __kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536 __kmalloc_reserve net/core/skbuff.c:143 [inline] __alloc_skb+0xbc/0x510 net/core/skbuff.c:211 alloc_skb include/linux/skbuff.h:1126 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_rt_notify+0x2db/0x550 net/ipv6/route.c:6047 fib6_add_rt2node net/ipv6/ip6_fib.c:1249 [inline] fib6_add+0x233e/0x3d20 net/ipv6/ip6_fib.c:1475 __ip6_ins_rt net/ipv6/route.c:1300 [inline] ip6_route_add+0x8a/0x130 net/ipv6/route.c:3761 addrconf_addr_gen+0x911/0xd00 addrconf_gre_config+0x173/0x510 net/ipv6/addrconf.c:3466 addrconf_notify+0x8b5/0xe90 net/ipv6/addrconf.c:3644 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:410 __dev_notify_flags+0x304/0x610 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_pages_ok+0x82c/0x850 mm/page_alloc.c:1629 free_the_page+0x76/0x370 mm/page_alloc.c:5407 __free_pages+0x67/0xc0 mm/page_alloc.c:5416 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab mm/slub.c:1915 [inline] unfreeze_partials+0x15e/0x190 mm/slub.c:2410 put_cpu_partial+0xbf/0x180 mm/slub.c:2446 __slab_free+0x2c8/0x3a0 mm/slub.c:3095 do_slab_free mm/slub.c:3191 [inline] ___cache_free+0x111/0x130 mm/slub.c:3210 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440 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 getname_flags+0xba/0x520 fs/namei.c:141 user_path_at_empty+0x2d/0x50 fs/namei.c:2740 Memory state around the buggy address: ffff88811f201300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811f201380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88811f201400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88811f201480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811f201500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================