Oops: general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 0 UID: 0 PID: 5843 Comm: syz-executor Not tainted 6.13.0-rc4-syzkaller-00078-g059dd502b263 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:sctp_v4_get_dst+0xa6d/0x12d0 net/sctp/protocol.c:498
Code: 18 00 0f 85 e9 06 00 00 4d 8b 36 4d 39 e6 0f 84 c7 02 00 00 e8 34 f3 3c f7 49 8d 7e 3d 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 18 38 d0 7f 08 84 c0 0f 85 ad 06 00 00 45 0f b6 6e 3d 31
RSP: 0018:ffffc90000007570 EFLAGS: 00010206
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: ffffffff8a5c5c4c
RDX: 0000000000000005 RSI: ffffffff8a5c5c1c RDI: 000000000000003d
RBP: ffffc90000007720 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000005 R12: ffff888059ab6088
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888026c323a4
FS: 00005555603c9500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f12299f27e0 CR3: 0000000034c32000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
sctp_transport_route+0x12e/0x350 net/sctp/transport.c:455
sctp_packet_config+0x808/0xf40 net/sctp/output.c:103
sctp_outq_select_transport+0x1e4/0x740 net/sctp/outqueue.c:869
sctp_outq_flush_ctrl net/sctp/outqueue.c:903 [inline]
sctp_outq_flush+0x493/0x3380 net/sctp/outqueue.c:1212
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1818 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
sctp_do_sm+0x179c/0x5c90 net/sctp/sm_sideeffect.c:1169
sctp_generate_timeout_event+0x1b8/0x3d0 net/sctp/sm_sideeffect.c:295
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1793
expire_timers kernel/time/timer.c:1844 [inline]
__run_timers+0x6e8/0x930 kernel/time/timer.c:2418
__run_timer_base kernel/time/timer.c:2430 [inline]
__run_timer_base kernel/time/timer.c:2422 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2439
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:213
Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 e4 8a 6a 7e 65 8b 05 e5 8a 6a 7e a9 00 01 ff 00 <48> 8b 34 24 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0
RSP: 0018:ffffc90003e3f7e8 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff88805af899b0 RCX: ffff88805af8a24f
RDX: ffff88805d0a5a00 RSI: dffffc0000000000 RDI: ffff88805af89d32
RBP: ffffffff9a713500 R08: 0000000000000005 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88805af89980
R13: 0000000000000001 R14: 0000000000000000 R15: ffff88805af89980
skb_peek include/linux/skbuff.h:2136 [inline]
tcp_send_head include/net/tcp.h:2023 [inline]
tcp_write_xmit+0x16b/0x8d10 net/ipv4/tcp_output.c:2760
__tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3012
tcp_push+0x221/0x6f0 net/ipv4/tcp.c:751
tcp_sendmsg_locked+0x28d1/0x3770 net/ipv4/tcp.c:1326
tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1358
inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:851
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
sock_write_iter+0x4ac/0x5b0 net/socket.c:1147
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x207/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f122c9847a0
Code: 40 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d a1 7d 1c 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffd012a5478 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffd012a59f0 RCX: 00007f122c9847a0
RDX: 0000000000000030 RSI: 00005555603e1d00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000000003e0 R09: 00005555603e0960
R10: 00005555603e1934 R11: 0000000000000202 R12: 0000000000000030
R13: 00005555603e1d00 R14: 0000000000000000 R15: 00007ffd012a59d0
</TASK>
Modules linked in:
vkms_vblank_simulate: vblank timer overrun
---[ end trace 0000000000000000 ]---
RIP: 0010:sctp_v4_get_dst+0xa6d/0x12d0 net/sctp/protocol.c:498
Code: 18 00 0f 85 e9 06 00 00 4d 8b 36 4d 39 e6 0f 84 c7 02 00 00 e8 34 f3 3c f7 49 8d 7e 3d 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 18 38 d0 7f 08 84 c0 0f 85 ad 06 00 00 45 0f b6 6e 3d 31
RSP: 0018:ffffc90000007570 EFLAGS: 00010206
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: ffffffff8a5c5c4c
RDX: 0000000000000005 RSI: ffffffff8a5c5c1c RDI: 000000000000003d
RBP: ffffc90000007720 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000005 R12: ffff888059ab6088
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888026c323a4
FS: 00005555603c9500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f12299f27e0 CR3: 0000000034c32000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 18 00 sbb %al,(%rax)
2: 0f 85 e9 06 00 00 jne 0x6f1
8: 4d 8b 36 mov (%r14),%r14
b: 4d 39 e6 cmp %r12,%r14
e: 0f 84 c7 02 00 00 je 0x2db
14: e8 34 f3 3c f7 call 0xf73cf34d
19: 49 8d 7e 3d lea 0x3d(%r14),%rdi
1d: 48 89 f8 mov %rdi,%rax
20: 48 89 fa mov %rdi,%rdx
23: 48 c1 e8 03 shr $0x3,%rax
27: 83 e2 07 and $0x7,%edx
* 2a: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax <-- trapping instruction
2e: 38 d0 cmp %dl,%al
30: 7f 08 jg 0x3a
32: 84 c0 test %al,%al
34: 0f 85 ad 06 00 00 jne 0x6e7
3a: 45 0f b6 6e 3d movzbl 0x3d(%r14),%r13d
3f: 31 .byte 0x31