================================================================== 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 ffff8880a145e040 by task syz-executor828/9271 CPU: 1 PID: 9271 Comm: syz-executor828 Not tainted 5.5.0-rc7-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+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:kmem_cache_free+0xc8/0xf0 mm/slab.c:3695 Code: 58 07 00 74 42 4c 89 f7 57 9d 0f 1f 44 00 00 e8 be d6 c9 ff eb 19 e8 57 d4 c9 ff 48 83 3d 47 43 58 07 00 74 24 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 89 e7 4c 89 fe e8 68 01 00 00 5b 41 5c 41 5e 41 RSP: 0018:ffffc90004dd79a0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffff88809faa0c94 RBX: ffff8880aa812a80 RCX: ffff88809faa0400 RDX: 0000000000000000 RSI: ffffffff81a45c14 RDI: 0000000000000282 RBP: ffffc90004dd79c0 R08: ffff88809faa0c58 R09: ffffc90004dd77c4 R10: 0000000000000012 R11: 0000000000000000 R12: ffffffff81a45c14 R13: dffffc0000000000 R14: 0000000000000282 R15: ffff88808ede90b0 ptlock_free+0x44/0x50 mm/memory.c:4800 pgtable_pmd_page_dtor include/linux/mm.h:2009 [inline] ___pmd_free_tlb+0xb2/0x120 arch/x86/mm/pgtable.c:65 __pmd_free_tlb arch/x86/include/asm/pgalloc.h:118 [inline] free_pmd_range mm/memory.c:252 [inline] free_pud_range mm/memory.c:270 [inline] free_p4d_range mm/memory.c:304 [inline] free_pgd_range+0xaa5/0xe90 mm/memory.c:384 free_pgtables+0x2c0/0x300 mm/memory.c:416 exit_mmap+0x290/0x540 mm/mmap.c:3135 __mmput+0x120/0x3a0 kernel/fork.c:1082 mmput+0x5d/0x70 kernel/fork.c:1103 exit_mm+0x4f4/0x580 kernel/exit.c:485 do_exit+0x572/0x2000 kernel/exit.c:788 do_group_exit+0x15c/0x2b0 kernel/exit.c:899 __do_sys_exit_group+0x17/0x20 kernel/exit.c:910 __se_sys_exit_group+0x14/0x20 kernel/exit.c:908 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:908 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440068 Code: Bad RIP value. RSP: 002b:00007fff0740e958 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068 RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00000000004bf8f0 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 8525: 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 8246: 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 single_release+0x91/0xa0 fs/seq_file.c:609 __fput+0x2e4/0x740 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:313 task_work_run+0x176/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:164 [inline] prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a145e040 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a145e040, ffff8880a145e060) The buggy address belongs to the page: page:ffffea0002851780 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff8880a145efc1 raw: 00fffe0000000200 ffffea0002509e48 ffffea0002575188 ffff8880aa8001c0 raw: ffff8880a145efc1 ffff8880a145e000 000000010000003d 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a145df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a145df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a145e000: 02 fc fc fc fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a145e080: fb fb fb fb fc fc fc fc 07 fc fc fc fc fc fc fc ffff8880a145e100: 07 fc fc fc fc fc fc fc 07 fc fc fc fc fc fc fc ==================================================================