================================================================== 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+0x173/0x5d0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff8880a6c290c0 by task kworker/0:180/3237 CPU: 0 PID: 3237 Comm: kworker/0:180 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events free_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 print_address_description+0x74/0x5c0 mm/kasan/report.c:374 __kasan_report+0x149/0x1c0 mm/kasan/report.c:506 kasan_report+0x26/0x50 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:182 [inline] check_memory_region+0x2b6/0x2f0 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+0x173/0x5d0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x776/0x970 kernel/time/timer.c:1773 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786 __do_softirq+0x283/0x7bd arch/x86/include/asm/paravirt.h:762 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:kfree+0x15f/0x220 mm/slab.c:3758 Code: f7 57 9d 0f 1f 44 00 00 e8 ae f9 c9 ff e9 87 00 00 00 e8 44 f7 c9 ff 48 83 3d 34 66 58 07 00 0f 84 b9 00 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 eb 68 c6 05 d0 8d 8e 07 01 48 c7 c7 26 4f c5 88 48 RSP: 0018:ffffc9000981fbd8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffff88809df68c14 RBX: ffff8880aa800380 RCX: ffffffff815bda87 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffffc9000981fc00 R08: ffff88809df68bd8 R09: fffffbfff13cd121 R10: fffffbfff13cd121 R11: 0000000000000000 R12: ffff8880a3353080 R13: 00fffe0000000200 R14: 0000000000000282 R15: ffffffff819e1c26 kvfree+0x46/0x50 mm/util.c:603 __vunmap+0x975/0xa10 mm/vmalloc.c:2311 free_work+0x66/0x90 mm/vmalloc.c:58 process_one_work+0x7f5/0x10d0 kernel/workqueue.c:2264 worker_thread+0xbbc/0x1630 kernel/workqueue.c:2410 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 8911: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:513 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x254/0x340 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc+0x21/0x40 include/linux/slab.h:670 ip_set_alloc+0x32/0x60 net/netfilter/ipset/ip_set_core.c:255 init_map_ipmac net/netfilter/ipset/ip_set_bitmap_ipmac.c:302 [inline] bitmap_ipmac_create+0x3d9/0x840 net/netfilter/ipset/ip_set_bitmap_ipmac.c:365 ip_set_create+0x421/0xfd0 net/netfilter/ipset/ip_set_core.c:1111 nfnetlink_rcv_msg+0x9ae/0xcd0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1e0/0x1e50 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2c/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2330 ___sys_sendmsg net/socket.c:2384 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2424 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8650: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10d/0x220 mm/slab.c:3757 tomoyo_find_next_domain+0xe45/0x1cc0 security/tomoyo/domain.c:878 tomoyo_bprm_check_security+0xe3/0x130 security/tomoyo/tomoyo.c:107 security_bprm_check+0x50/0xb0 security/security.c:784 search_binary_handler+0x6a/0x5e0 fs/exec.c:1645 exec_binprm fs/exec.c:1701 [inline] __do_execve_file+0x1565/0x1cc0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x94/0xb0 fs/exec.c:1955 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a6c290c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a6c290c0, ffff8880a6c290e0) The buggy address belongs to the page: page:ffffea00029b0a40 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff8880a6c29fc1 raw: 00fffe0000000200 ffffea000274dbc8 ffffea0002a5d708 ffff8880aa8001c0 raw: ffff8880a6c29fc1 ffff8880a6c29000 0000000100000013 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a6c28f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a6c29000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a6c29080: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a6c29100: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a6c29180: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ==================================================================