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sctp: [Deprecated]: syz-executor.4 (pid 16540) Use of int in max_burst socket option deprecated.
Use struct sctp_assoc_value instead
BUG: KASAN: null-ptr-deref in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: null-ptr-deref in atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
BUG: KASAN: null-ptr-deref in atomic_add_unless include/linux/atomic.h:597 [inline]
BUG: KASAN: null-ptr-deref in dst_hold_safe include/net/dst.h:308 [inline]
BUG: KASAN: null-ptr-deref in ip6_hold_safe+0xa7/0x3a0 net/ipv6/route.c:1023
Read of size 4 at addr 000000000000009f by task syz-executor.1/16539

CPU: 0 PID: 16539 Comm: syz-executor.1 Not tainted 5.0.0-rc6+ #68
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
 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:100
 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
 atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
 atomic_add_unless include/linux/atomic.h:597 [inline]
 dst_hold_safe include/net/dst.h:308 [inline]
 ip6_hold_safe+0xa7/0x3a0 net/ipv6/route.c:1023
 rt6_get_pcpu_route net/ipv6/route.c:1243 [inline]
 ip6_pol_route+0x33d/0xf00 net/ipv6/route.c:1892
 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2068
 fib6_rule_lookup+0x128/0x560 net/ipv6/fib6_rules.c:118
IPVS: length: 154 != 24
 ip6_route_output_flags+0x2c4/0x350 net/ipv6/route.c:2097
 ip6_route_output include/net/ip6_route.h:88 [inline]
 ip6_dst_lookup_tail+0xd10/0x1b30 net/ipv6/ip6_output.c:958
 ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1086
IPVS: length: 154 != 24
 ip6_sk_dst_lookup_flow net/ipv6/ip6_output.c:1124 [inline]
 ip6_sk_dst_lookup_flow+0x5c3/0xad0 net/ipv6/ip6_output.c:1114
 udpv6_sendmsg+0x178b/0x28b0 net/ipv6/udp.c:1449
 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 __sys_sendto+0x262/0x380 net/socket.c:1808
 __do_sys_sendto net/socket.c:1820 [inline]
 __se_sys_sendto net/socket.c:1816 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1816
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e29
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6091831c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000073bfa0 R08: 0000000020000300 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f60918326d4
R13: 00000000004c54f3 R14: 00000000004d93a0 R15: 00000000ffffffff
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