kernel msg: ebtables bug: please report to author: Wrong len argument kernel msg: ebtables bug: please report to author: Wrong len argument dccp_invalid_packet: P.Data Offset(68) too large ================================================================== BUG: KASAN: slab-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] BUG: KASAN: slab-out-of-bounds in refcount_read include/linux/refcount.h:42 [inline] BUG: KASAN: slab-out-of-bounds in check_net include/net/net_namespace.h:236 [inline] BUG: KASAN: slab-out-of-bounds in rds_destroy_pending net/rds/rds.h:897 [inline] BUG: KASAN: slab-out-of-bounds in rds_cong_queue_updates+0x255/0x590 net/rds/cong.c:226 Read of size 4 at addr ffff8801b2448404 by task syz-executor3/23005 CPU: 1 PID: 23005 Comm: syz-executor3 Not tainted 4.17.0+ #84 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 dccp_invalid_packet: P.Data Offset(68) too large Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] refcount_read include/linux/refcount.h:42 [inline] check_net include/net/net_namespace.h:236 [inline] rds_destroy_pending net/rds/rds.h:897 [inline] rds_cong_queue_updates+0x255/0x590 net/rds/cong.c:226 rds_recv_rcvbuf_delta.part.3+0x2b9/0x350 net/rds/recv.c:118 rds_recv_rcvbuf_delta net/rds/recv.c:377 [inline] rds_recv_incoming+0x83f/0x1300 net/rds/recv.c:377 rds_loop_xmit+0x16a/0x340 net/rds/loop.c:82 rds_send_xmit+0x131b/0x2990 net/rds/send.c:355 rds_sendmsg+0x228d/0x2a30 net/rds/send.c:1243 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 __sys_sendto+0x3d7/0x670 net/socket.c:1833 xt_AUDIT: Audit type out of range (valid range: 0..2) __do_sys_sendto net/socket.c:1845 [inline] __se_sys_sendto net/socket.c:1841 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1841 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 xt_AUDIT: Audit type out of range (valid range: 0..2) entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb5091c7c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb5091c86d4 RCX: 0000000000455b29 RDX: 0000000000000481 RSI: 0000000020000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 000000002069affb R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c0f7f R14: 00000000004d0e70 R15: 0000000000000000 Allocated by task 2741: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node+0x47/0x70 mm/slab.c:3689 kmalloc_node include/linux/slab.h:555 [inline] kvmalloc_node+0x65/0xf0 mm/util.c:423 kvmalloc include/linux/mm.h:557 [inline] seq_buf_alloc fs/seq_file.c:32 [inline] seq_read+0xa33/0x1520 fs/seq_file.c:211 kernfs_fop_read+0x13e/0x690 fs/kernfs/file.c:252 __vfs_read+0x10b/0xa60 fs/read_write.c:416 vfs_read+0x17f/0x3d0 fs/read_write.c:452 ksys_read+0xf9/0x250 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2741: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 kvfree+0x61/0x70 mm/util.c:442 seq_release+0x51/0x80 fs/seq_file.c:371 kernfs_fop_release+0xf7/0x1a0 fs/kernfs/file.c:781 __fput+0x353/0x890 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1e4/0x290 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x302/0x360 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801b24486c0 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 700 bytes to the left of 4096-byte region [ffff8801b24486c0, ffff8801b24496c0) The buggy address belongs to the page: page:ffffea0006c91200 count:1 mapcount:0 mapping:ffff8801da800dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00069f0608 ffffea00063e8b88 ffff8801da800dc0 raw: 0000000000000000 ffff8801b24486c0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b2448300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801b2448380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801b2448400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801b2448480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801b2448500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================