================================================================== BUG: KASAN: slab-out-of-bounds in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc_test net/netfilter/ipset/ip_set_bitmap_ipmac.c:102 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff8880a3a99340 by task syz-executor.3/21922 CPU: 0 PID: 21922 Comm: syz-executor.3 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] bitmap_ipmac_gc_test net/netfilter/ipset/ip_set_bitmap_ipmac.c:102 [inline] bitmap_ipmac_gc+0x119/0x590 net/netfilter/ipset/ip_set_bitmap_gen.h:277 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__find_get_block+0x289/0xea0 fs/buffer.c:1334 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 fb 0a 00 00 48 83 3d 11 32 c6 07 00 0f 84 54 08 00 00 e8 7e f3 a7 ff fb 66 0f 1f 44 00 00 <4d> 85 ff 0f 84 f1 01 00 00 e8 69 f3 a7 ff 0f 1f 44 00 00 e8 5f f3 RSP: 0018:ffffc90001637a58 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff888097b00340 RBX: ffff888092111f18 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff81cd01a2 RDI: ffff888097b00bd4 RBP: ffffc90001637ab8 R08: 1ffffffff165e7ad R09: fffffbfff165e7ae R10: fffffbfff165e7ad R11: ffffffff8b2f3d6f R12: 0000000000000000 R13: 0000000000000445 R14: 0000000000000000 R15: ffff888092111f18 sb_find_get_block include/linux/buffer_head.h:338 [inline] recently_deleted fs/ext4/ialloc.c:677 [inline] find_inode_bit.isra.0+0x202/0x520 fs/ext4/ialloc.c:717 __ext4_new_inode+0x16eb/0x4fa0 fs/ext4/ialloc.c:909 ext4_symlink+0x4b7/0xf50 fs/ext4/namei.c:3281 vfs_symlink fs/namei.c:4067 [inline] vfs_symlink+0x373/0x5a0 fs/namei.c:4053 do_symlinkat+0x22b/0x290 fs/namei.c:4094 __do_sys_symlink fs/namei.c:4113 [inline] __se_sys_symlink fs/namei.c:4111 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4111 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b077 Code: 0f 1f 00 b8 5c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4d b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffcdc0c2a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045b077 RDX: 00007fffcdc0c347 RSI: 00000000004c0ee4 RDI: 00007fffcdc0c330 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000017 R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000001 R13: 00007fffcdc0c2e0 R14: 0000000000000000 R15: 00007fffcdc0c2f0 Allocated by task 21849: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x163/0x770 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:670 [inline] ip_set_alloc+0x38/0x5e net/netfilter/ipset/ip_set_core.c:255 init_map_ipmac net/netfilter/ipset/ip_set_bitmap_ipmac.c:302 [inline] bitmap_ipmac_create+0x4e8/0xa00 net/netfilter/ipset/ip_set_bitmap_ipmac.c:365 ip_set_create+0x6f1/0x1500 net/netfilter/ipset/ip_set_core.c:1111 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9646: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x2c0 mm/slab.c:3757 kvfree+0x61/0x70 mm/util.c:603 __vunmap+0x6ba/0x950 mm/vmalloc.c:2311 __vfree+0x41/0xd0 mm/vmalloc.c:2355 vfree+0x5f/0x90 mm/vmalloc.c:2385 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:883 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline] do_ip6t_get_ctl+0x750/0x960 net/ipv6/netfilter/ip6_tables.c:1709 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x7a/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt net/ipv6/ipv6_sockglue.c:1400 [inline] ipv6_getsockopt+0x205/0x280 net/ipv6/ipv6_sockglue.c:1380 tcp_getsockopt net/ipv4/tcp.c:3690 [inline] tcp_getsockopt+0x8f/0xe0 net/ipv4/tcp.c:3684 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:3108 __sys_getsockopt+0x16d/0x310 net/socket.c:2162 __do_sys_getsockopt net/socket.c:2177 [inline] __se_sys_getsockopt net/socket.c:2174 [inline] __x64_sys_getsockopt+0xbe/0x150 net/socket.c:2174 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a3a99340 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a3a99340, ffff8880a3a99360) The buggy address belongs to the page: page:ffffea00028ea640 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a3a99fc1 raw: 00fffe0000000200 ffffea00025d6c08 ffffea00028b0dc8 ffff8880aa4001c0 raw: ffff8880a3a99fc1 ffff8880a3a99000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a3a99200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a3a99280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a3a99300: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a3a99380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a3a99400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================