================================================================== 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_port_gc_test net/netfilter/ipset/ip_set_bitmap_port.c:67 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff8880a85dad40 by task syz-executor.2/15106 CPU: 1 PID: 15106 Comm: syz-executor.2 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_port_gc_test net/netfilter/ipset/ip_set_bitmap_port.c:67 [inline] bitmap_port_gc+0x112/0x4f0 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_next_bit lib/find_bit.c:39 [inline] RIP: 0010:find_next_zero_bit+0x49/0x140 lib/find_bit.c:79 Code: 89 ef e8 aa 5d d9 fd 4d 39 fd 0f 86 dd 00 00 00 e8 7c 5c d9 fd 4c 89 f8 48 c1 e8 06 49 8d 1c c6 48 b8 00 00 00 00 00 fc ff df <48> 89 da 48 c1 ea 03 80 3c 02 00 0f 85 cf 00 00 00 48 8b 33 44 89 RSP: 0018:ffffc90001ac7a90 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88808d0b0030 RCX: ffffffff839ba346 RDX: 0000000000000000 RSI: ffffffff839ba354 RDI: 0000000000000006 RBP: ffffc90001ac7ab8 R08: ffff88805b26e180 R09: ffffed1012290a0d R10: ffffed1012290a0c R11: ffff888091485063 R12: dffffc0000000000 R13: 0000000000002000 R14: ffff88808d0b0000 R15: 0000000000000194 find_next_zero_bit_le include/asm-generic/bitops/le.h:15 [inline] find_inode_bit.isra.0+0xdc/0x520 fs/ext4/ialloc.c:710 __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:00007ffdfac01cf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045b077 RDX: 00007ffdfac01d93 RSI: 00000000004c0efa RDI: 00007ffdfac01d80 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000001 R13: 00007ffdfac01d30 R14: 0000000000000000 R15: 00007ffdfac01d40 Allocated by task 15043: 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_port net/netfilter/ipset/ip_set_bitmap_port.c:234 [inline] bitmap_port_create+0x3dc/0x7c0 net/netfilter/ipset/ip_set_bitmap_port.c:276 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+0x59e/0x7e0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 14427: 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 tomoyo_path_perm+0x389/0x430 security/tomoyo/file.c:840 tomoyo_path_symlink+0xaa/0xf0 security/tomoyo/tomoyo.c:206 security_path_symlink+0x10a/0x170 security/security.c:1053 do_symlinkat+0x137/0x290 fs/namei.c:4092 __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 The buggy address belongs to the object at ffff8880a85dad40 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a85dad40, ffff8880a85dad60) The buggy address belongs to the page: page:ffffea0002a17680 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a85dafc1 raw: 00fffe0000000200 ffffea0002a35c48 ffffea0002a69708 ffff8880aa4001c0 raw: ffff8880a85dafc1 ffff8880a85da000 0000000100000037 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a85dac00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a85dac80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a85dad00: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a85dad80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a85dae00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc 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