================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-out-of-bounds in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-out-of-bounds in mapping_release_always include/linux/pagemap.h:279 [inline] BUG: KASAN: slab-out-of-bounds in folio_needs_release mm/internal.h:187 [inline] BUG: KASAN: slab-out-of-bounds in shrink_folio_list+0x2dbf/0x3e60 mm/vmscan.c:2067 Read of size 8 at addr ffff8880208010d1 by task syz-executor.1/31525 CPU: 1 PID: 31525 Comm: syz-executor.1 Not tainted 6.4.0-next-20230707-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364 print_report mm/kasan/report.c:475 [inline] kasan_report+0x11d/0x130 mm/kasan/report.c:588 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0xf0/0x190 mm/kasan/generic.c:187 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_release_always include/linux/pagemap.h:279 [inline] folio_needs_release mm/internal.h:187 [inline] shrink_folio_list+0x2dbf/0x3e60 mm/vmscan.c:2067 evict_folios+0x794/0x1940 mm/vmscan.c:5181 try_to_shrink_lruvec+0x82c/0xb90 mm/vmscan.c:5357 lru_gen_shrink_lruvec mm/vmscan.c:5494 [inline] shrink_lruvec+0x216/0x2810 mm/vmscan.c:6269 shrink_node_memcgs mm/vmscan.c:6489 [inline] shrink_node+0x7ad/0x3690 mm/vmscan.c:6524 shrink_zones mm/vmscan.c:6763 [inline] do_try_to_free_pages+0x3cc/0x18f0 mm/vmscan.c:6825 try_to_free_mem_cgroup_pages+0x368/0x840 mm/vmscan.c:7140 try_charge_memcg+0x508/0x13b0 mm/memcontrol.c:2695 obj_cgroup_charge_pages mm/memcontrol.c:3109 [inline] __memcg_kmem_charge_page+0x16e/0x3c0 mm/memcontrol.c:3135 __alloc_pages+0x1f3/0x4a0 mm/page_alloc.c:4529 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 vm_area_alloc_pages mm/vmalloc.c:3059 [inline] __vmalloc_area_node mm/vmalloc.c:3135 [inline] __vmalloc_node_range+0xb1c/0x14c0 mm/vmalloc.c:3316 kvmalloc_node+0x156/0x1a0 mm/util.c:629 kvmalloc include/linux/slab.h:720 [inline] xt_alloc_table_info+0x40/0xa0 net/netfilter/x_tables.c:1192 do_replace net/ipv6/netfilter/ip6_tables.c:1139 [inline] do_ip6t_set_ctl+0x514/0xb30 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x87/0xe0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x12b/0x190 net/ipv6/ipv6_sockglue.c:1017 tcp_setsockopt+0x9f/0x100 net/ipv4/tcp.c:3695 __sys_setsockopt+0x2c6/0x5b0 net/socket.c:2263 __do_sys_setsockopt net/socket.c:2274 [inline] __se_sys_setsockopt net/socket.c:2271 [inline] __x64_sys_setsockopt+0xbe/0x160 net/socket.c:2271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f230fe8c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2310c49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f230ffabf80 RCX: 00007f230fe8c389 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007f230fed7493 R08: 0000000000000358 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc66e34bf R14: 00007f2310c49300 R15: 0000000000022000 Allocated by task 5056: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x173/0x390 mm/slub.c:3494 kmem_cache_zalloc include/linux/slab.h:693 [inline] lsm_file_alloc security/security.c:611 [inline] security_file_alloc+0x38/0x170 security/security.c:2564 init_file+0xbb/0x2e0 fs/file_table.c:161 alloc_empty_file+0x94/0x1d0 fs/file_table.c:210 alloc_file+0x5e/0x800 fs/file_table.c:293 alloc_file_pseudo+0x169/0x250 fs/file_table.c:336 sock_alloc_file+0x53/0x1d0 net/socket.c:466 sock_map_fd net/socket.c:491 [inline] __sys_socket+0x1a8/0x250 net/socket.c:1660 __do_sys_socket net/socket.c:1665 [inline] __se_sys_socket net/socket.c:1663 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1663 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5056: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1818 slab_free mm/slub.c:3801 [inline] kmem_cache_free+0xf0/0x490 mm/slub.c:3823 security_file_free+0xa8/0xd0 security/security.c:2589 file_free fs/file_table.c:77 [inline] __fput+0x580/0xad0 fs/file_table.c:397 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888020801078 which belongs to the cache lsm_file_cache of size 88 The buggy address is located 1 bytes to the right of allocated 88-byte region [ffff888020801078, ffff8880208010d0) The buggy address belongs to the physical page: page:ffffea0000820040 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880208010f0 pfn:0x20801 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888014675140 ffffea000060ff10 ffffea000086c990 raw: ffff8880208010f0 0000000000220013 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 4436, tgid 4436 (kworker/u4:5), ts 27828243723, free_ts 24495572075 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0xfd9/0x2c40 mm/page_alloc.c:3256 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4512 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x25f/0x390 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0xbc3/0x15d0 mm/slub.c:3215 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x371/0x390 mm/slub.c:3494 kmem_cache_zalloc include/linux/slab.h:693 [inline] lsm_file_alloc security/security.c:611 [inline] security_file_alloc+0x38/0x170 security/security.c:2564 init_file+0xbb/0x2e0 fs/file_table.c:161 alloc_empty_file+0x94/0x1d0 fs/file_table.c:210 path_openat+0xe6/0x2710 fs/namei.c:3779 do_filp_open+0x1ba/0x410 fs/namei.c:3820 do_open_execat+0x10d/0x3c0 fs/exec.c:923 bprm_execve fs/exec.c:1830 [inline] bprm_execve+0x49a/0x1980 fs/exec.c:1811 kernel_execve+0x3ee/0x500 fs/exec.c:2023 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1160 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2383 free_unref_page+0x33/0x370 mm/page_alloc.c:2478 vfree+0x180/0x7b0 mm/vmalloc.c:2842 delayed_vfree_work+0x57/0x70 mm/vmalloc.c:2763 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748 kthread+0x344/0x440 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888020800f80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff888020801000: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fa >ffff888020801080: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fb fb ^ ffff888020801100: fb fb fb fb fb fb fb fb fb fc fc fc fc 00 00 00 ffff888020801180: 00 00 00 00 00 00 00 00 fc fc fc fc fa fb fb fb 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