================================================================== BUG: KASAN: null-ptr-deref in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] BUG: KASAN: null-ptr-deref in atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] BUG: KASAN: null-ptr-deref in atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] BUG: KASAN: null-ptr-deref in atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] BUG: KASAN: null-ptr-deref in dst_hold_safe include/net/dst.h:297 [inline] BUG: KASAN: null-ptr-deref in ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1046 Read of size 4 at addr 0000000000000229 by task syz-executor.3/2580 CPU: 0 PID: 2580 Comm: syz-executor.3 Not tainted 5.2.0-rc3+ #51 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+0x172/0x1f0 lib/dump_stack.c:113 __kasan_report.cold+0x5/0x40 mm/kasan/report.c:321 kasan_report+0x12/0x20 mm/kasan/common.c:614 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 kasan_check_read+0x11/0x20 mm/kasan/common.c:94 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] dst_hold_safe include/net/dst.h:297 [inline] ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1046 rt6_get_pcpu_route net/ipv6/route.c:1273 [inline] ip6_pol_route+0x339/0x1050 net/ipv6/route.c:1952 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2128 fib6_rule_lookup+0x133/0x5a0 net/ipv6/fib6_rules.c:116 ip6_route_output_flags+0x2c4/0x350 net/ipv6/route.c:2157 ip6_route_output include/net/ip6_route.h:89 [inline] ip6_dst_lookup_tail+0xd10/0x1b30 net/ipv6/ip6_output.c:962 ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1090 sctp_v6_get_dst+0x785/0x1ce0 net/sctp/ipv6.c:278 sctp_transport_route+0x12d/0x360 net/sctp/transport.c:297 sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:663 sctp_process_param net/sctp/sm_make_chunk.c:2522 [inline] sctp_process_init+0x2458/0x2ad0 net/sctp/sm_make_chunk.c:2343 sctp_cmd_process_init net/sctp/sm_sideeffect.c:667 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1374 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1184 [inline] sctp_do_sm+0x3a34/0x5190 net/sctp/sm_sideeffect.c:1155 sctp_assoc_bh_rcv+0x343/0x660 net/sctp/associola.c:1059 sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x196/0xbe0 net/sctp/input.c:339 sk_backlog_rcv include/net/sock.h:945 [inline] __release_sock+0x129/0x390 net/core/sock.c:2412 release_sock+0x59/0x1c0 net/core/sock.c:2928 sctp_wait_for_connect+0x316/0x540 net/sctp/socket.c:9039 __sctp_connect+0xab2/0xcd0 net/sctp/socket.c:1226 __sctp_setsockopt_connectx+0x133/0x1a0 net/sctp/socket.c:1334 sctp_setsockopt_connectx_old net/sctp/socket.c:1350 [inline] sctp_setsockopt net/sctp/socket.c:4644 [inline] sctp_setsockopt+0x22c0/0x6d10 net/sctp/socket.c:4608 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3124 __sys_setsockopt+0x17a/0x280 net/socket.c:2072 __do_sys_setsockopt net/socket.c:2083 [inline] __se_sys_setsockopt net/socket.c:2080 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2080 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f264f3adc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004592c9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 000000000000002c R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00007f264f3ae6d4 R13: 00000000004ced98 R14: 00000000004dd4f0 R15: 00000000ffffffff ==================================================================