[drm:drm_calc_timestamping_constants] *ERROR* crtc 29: Can't calculate constants, dotclock = 0! ================================================================== BUG: KMSAN: kernel-infoleak in _copy_to_user+0x178/0x220 lib/usercopy.c:32 CPU: 0 PID: 7606 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #14 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+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:613 kmsan_internal_check_memory+0x455/0xb00 mm/kmsan/kmsan.c:675 kmsan_copy_to_user+0xab/0xc0 mm/kmsan/kmsan_hooks.c:601 _copy_to_user+0x178/0x220 lib/usercopy.c:32 copy_to_user include/linux/uaccess.h:177 [inline] sctp_getsockopt_local_addrs net/sctp/socket.c:5981 [inline] sctp_getsockopt+0x164fe/0x17550 net/sctp/socket.c:7460 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457759 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f108570fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457759 RDX: 000000000000006d RSI: 0000000000000084 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 00000000200001c0 R09: 0000000000000000 R10: 0000000020000100 R11: 0000000000000246 R12: 00007f10857106d4 R13: 00000000004c8d70 R14: 00000000004cf610 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline] kmsan_save_stack mm/kmsan/kmsan.c:219 [inline] kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:439 kmsan_memcpy_memmove_metadata+0x58f/0xfa0 mm/kmsan/kmsan.c:316 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:337 __msan_memcpy+0x5b/0x70 mm/kmsan/kmsan_instr.c:133 sctp_getsockopt_local_addrs net/sctp/socket.c:5973 [inline] sctp_getsockopt+0x1633f/0x17550 net/sctp/socket.c:7460 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline] kmsan_save_stack mm/kmsan/kmsan.c:219 [inline] kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:439 kmsan_memcpy_memmove_metadata+0x58f/0xfa0 mm/kmsan/kmsan.c:316 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:337 __msan_memcpy+0x5b/0x70 mm/kmsan/kmsan_instr.c:133 sctp_getsockopt_local_addrs net/sctp/socket.c:5966 [inline] sctp_getsockopt+0x1623e/0x17550 net/sctp/socket.c:7460 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline] kmsan_save_stack mm/kmsan/kmsan.c:219 [inline] kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:439 kmsan_memcpy_memmove_metadata+0x58f/0xfa0 mm/kmsan/kmsan.c:316 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:337 __msan_memcpy+0x5b/0x70 mm/kmsan/kmsan_instr.c:133 sctp_add_bind_addr+0x16f/0x610 net/sctp/bind_addr.c:163 sctp_copy_local_addr_list+0x4e7/0x660 net/sctp/protocol.c:180 sctp_copy_one_addr+0x1fd/0xc30 net/sctp/bind_addr.c:449 sctp_bind_addr_copy+0x22d/0x8a0 net/sctp/bind_addr.c:71 sctp_assoc_set_bind_addr_from_ep+0x219/0x270 net/sctp/associola.c:1606 __sctp_connect+0x121f/0x1c20 net/sctp/socket.c:1196 __sctp_setsockopt_connectx net/sctp/socket.c:1349 [inline] sctp_setsockopt_connectx net/sctp/socket.c:1381 [inline] sctp_setsockopt+0x5931/0x124c0 net/sctp/socket.c:4325 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:2978 __sys_setsockopt+0x493/0x540 net/socket.c:1902 __do_sys_setsockopt net/socket.c:1913 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:1910 __x64_sys_setsockopt+0x62/0x80 net/socket.c:1910 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline] kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:158 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176 kmem_cache_alloc_trace+0x55a/0xb90 mm/slub.c:2789 kmalloc include/linux/slab.h:546 [inline] sctp_inet6addr_event+0x5c9/0xc10 net/sctp/ipv6.c:100 notifier_call_chain kernel/notifier.c:93 [inline] __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x13d/0x240 kernel/notifier.c:193 inet6addr_notifier_call_chain+0x76/0x90 net/ipv6/addrconf_core.c:107 ipv6_add_addr+0x2361/0x2620 net/ipv6/addrconf.c:1115 add_addr+0x1a8/0x510 net/ipv6/addrconf.c:3044 sit_add_v4_addrs net/ipv6/addrconf.c:3105 [inline] addrconf_sit_config net/ipv6/addrconf.c:3348 [inline] addrconf_notify+0x4956/0x5920 net/ipv6/addrconf.c:3543 notifier_call_chain kernel/notifier.c:93 [inline] __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:401 __dev_notify_flags+0x3d3/0x830 net/core/dev.c:1733 dev_change_flags+0x1ac/0x230 net/core/dev.c:7581 do_setlink+0x162f/0x5d40 net/core/rtnetlink.c:2492 rtnl_newlink+0x2bfb/0x35c0 net/core/rtnetlink.c:3111 rtnetlink_rcv_msg+0x115b/0x1550 net/core/rtnetlink.c:4950 netlink_rcv_skb+0x444/0x640 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:4968 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xf40/0x1020 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x127f/0x1300 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xdb9/0x11b0 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Bytes 88-91 of 784 are uninitialized Memory access of size 784 starts at ffff88808bc13000 Data copied to user address 0000000020000108 ==================================================================