Hello, syzbot found the following issue on: HEAD commit: 86cfccb6 Merge tag 'dlm-5.9' of git://git.kernel.org/pub/s.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1419de8a900000 kernel config: https://syzkaller.appspot.com/x/.config?x=bcf489e08c9b8c5e dashboard link: https://syzkaller.appspot.com/bug?extid=64d60892aaa4d4c34812 compiler: gcc (GCC) 10.1.0-syz 20200507 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64d60892aaa4d4c34812@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: KASAN: wild-memory-access in memcpy include/linux/string.h:406 [inline] BUG: KASAN: wild-memory-access in copy_from_sockptr_offset include/linux/sockptr.h:71 [inline] BUG: KASAN: wild-memory-access in copy_from_sockptr include/linux/sockptr.h:77 [inline] BUG: KASAN: wild-memory-access in compat_update_counters net/bridge/netfilter/ebtables.c:2222 [inline] BUG: KASAN: wild-memory-access in do_ebt_set_ctl+0x2c0/0x53b net/bridge/netfilter/ebtables.c:2389 Read of size 80 at addr 00000000ffffffff by task syz-executor.3/9621 CPU: 1 PID: 9621 Comm: syz-executor.3 Not tainted 5.8.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:517 [inline] kasan_report.cold+0x5/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:406 [inline] copy_from_sockptr_offset include/linux/sockptr.h:71 [inline] copy_from_sockptr include/linux/sockptr.h:77 [inline] compat_update_counters net/bridge/netfilter/ebtables.c:2222 [inline] do_ebt_set_ctl+0x2c0/0x53b net/bridge/netfilter/ebtables.c:2389 nf_setsockopt+0x6f/0xc0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x54d/0x3c10 net/ipv4/ip_sockglue.c:1436 raw_setsockopt+0x205/0x250 net/ipv4/raw.c:856 __sys_setsockopt+0x2ad/0x6d0 net/socket.c:2138 __do_sys_setsockopt net/socket.c:2149 [inline] __se_sys_setsockopt net/socket.c:2146 [inline] __ia32_sys_setsockopt+0xb9/0x150 net/socket.c:2146 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline] __do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f19569 Code: c4 01 10 03 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55130bc EFLAGS: 00000296 ORIG_RAX: 000000000000016e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000081 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
