================================================================== BUG: KASAN: slab-out-of-bounds in ext4_read_inline_data fs/ext4/inline.c:210 [inline] BUG: KASAN: slab-out-of-bounds in ext4_read_inline_dir+0x4b6/0xe70 fs/ext4/inline.c:1559 Read of size 68 at addr ffff88812a6b241e by task syz.2.17/482 CPU: 0 PID: 482 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 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+0x10f/0x150 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 memcpy+0x2d/0x70 mm/kasan/shadow.c:65 ext4_read_inline_data fs/ext4/inline.c:210 [inline] ext4_read_inline_dir+0x4b6/0xe70 fs/ext4/inline.c:1559 ext4_readdir+0x3af/0x3aa0 fs/ext4/dir.c:161 iterate_dir+0x25c/0x600 fs/readdir.c:-1 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents+0xf2/0x250 fs/readdir.c:271 __x64_sys_getdents+0x7b/0x90 fs/readdir.c:271 x64_sys_call+0xb4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:79 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 RIP: 0033:0x7fd3e6526e99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd3e6388028 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007fd3e67aefa0 RCX: 00007fd3e6526e99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007fd3e65bceaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd3e67af038 R14: 00007fd3e67aefa0 R15: 00007ffd035ffdc8 Allocated by task 2: 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+0xd4/0x100 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 __kmalloc_node include/linux/slab.h:487 [inline] kmalloc_node include/linux/slab.h:642 [inline] __vmalloc_area_node mm/vmalloc.c:2967 [inline] __vmalloc_node_range+0x384/0xad0 mm/vmalloc.c:3147 alloc_thread_stack_node kernel/fork.c:258 [inline] dup_task_struct+0x41e/0xc70 kernel/fork.c:949 copy_process+0x5e0/0x3230 kernel/fork.c:2188 kernel_clone+0x233/0x960 kernel/fork.c:2744 kernel_thread+0xfe/0x170 kernel/fork.c:2805 create_kthread kernel/kthread.c:360 [inline] kthreadd+0x346/0x480 kernel/kthread.c:718 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88812a6b2400 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 30 bytes inside of 64-byte region [ffff88812a6b2400, ffff88812a6b2440) The buggy address belongs to the page: page:ffffea0004a9ac80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12a6b2 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042780 raw: 0000000000000000 0000000000200020 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 477, ts 42090481539, free_ts 42090395796 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2610 prep_new_page+0x1c/0x110 mm/page_alloc.c:2616 get_page_from_freelist+0x2d42/0x2dd0 mm/page_alloc.c:4492 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5829 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 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] kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272 kmem_cache_alloc_node_trace include/linux/slab.h:508 [inline] kmalloc_node include/linux/slab.h:637 [inline] kzalloc_node include/linux/slab.h:761 [inline] __get_vm_area_node+0x11d/0x350 mm/vmalloc.c:2440 __vmalloc_node_range+0xe8/0xad0 mm/vmalloc.c:3107 __vmalloc_node mm/vmalloc.c:3212 [inline] vzalloc+0x78/0x90 mm/vmalloc.c:3282 alloc_counters+0x65/0x540 net/ipv4/netfilter/ip_tables.c:800 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:822 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1021 [inline] do_ipt_get_ctl+0xa26/0x1100 net/ipv4/netfilter/ip_tables.c:1666 nf_getsockopt+0x26d/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x134d/0x17a0 net/ipv4/ip_sockglue.c:1797 tcp_getsockopt+0x1fc/0x23a0 net/ipv4/tcp.c:4315 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1477 [inline] free_pcp_prepare mm/page_alloc.c:1549 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3540 free_unref_page+0xae/0x540 mm/page_alloc.c:3622 free_the_page mm/page_alloc.c:808 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5905 __vunmap+0x801/0x980 mm/vmalloc.c:2660 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:865 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1021 [inline] do_ipt_get_ctl+0xe21/0x1100 net/ipv4/netfilter/ip_tables.c:1666 nf_getsockopt+0x26d/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x134d/0x17a0 net/ipv4/ip_sockglue.c:1797 tcp_getsockopt+0x1fc/0x23a0 net/ipv4/tcp.c:4315 sock_common_getsockopt+0x98/0xb0 net/core/sock.c:3448 __sys_getsockopt+0x207/0x400 net/socket.c:2247 __do_sys_getsockopt net/socket.c:2262 [inline] __se_sys_getsockopt net/socket.c:2259 [inline] __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2259 x64_sys_call+0x6db/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:56 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 Memory state around the buggy address: ffff88812a6b2300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88812a6b2380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88812a6b2400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88812a6b2480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88812a6b2500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================