------------[ cut here ]------------ WARNING: CPU: 1 PID: 7594 at kernel/workqueue.c:2257 __queue_work+0xc3a/0x1080 kernel/workqueue.c:2256 Modules linked in: CPU: 1 UID: 0 PID: 7594 Comm: syz.3.514 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:__queue_work+0xc3a/0x1080 kernel/workqueue.c:2256 Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 6f cc 98 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 e0 f9 36 00 85 db 75 60 e8 97 f7 36 00 90 <0f> 0b 90 e9 f9 f7 ff ff e8 89 f7 36 00 90 0f 0b 90 e9 7e f6 ff ff RSP: 0018:ffffc90000a18be8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff81631bc1 RDX: ffff88801c341e00 RSI: ffffffff81631c19 RDI: 0000000000000005 RBP: ffff888034074930 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000002 R12: 1ffff9200014318f R13: 0000000000000001 R14: 0000000080000100 R15: ffff8880329c7000 FS: 00007f7b4b03c6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3cb317 CR3: 0000000079372000 CR4: 0000000000350ef0 Call Trace: call_timer_fn+0x1a3/0x610 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1839 [inline] __run_timers+0x56a/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+0x216/0x8f0 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:sctp_v6_get_dst+0xe8a/0x2050 net/sctp/ipv6.c:344 Code: fe ff ff 48 c1 ea 03 48 89 9d 28 fe ff ff 4a 8d 0c 32 48 89 b5 48 fe ff ff 48 89 8d 40 fe ff ff eb 24 e8 99 22 27 f7 4c 89 e0 <48> c1 e8 03 42 80 3c 30 00 0f 85 aa 0f 00 00 4d 8b 24 24 4d 39 fc RSP: 0018:ffffc90003a9f1f0 EFLAGS: 00000283 RAX: ffff88802f1e0a00 RBX: 0000000000000000 RCX: ffffc90010102000 RDX: 0000000000080000 RSI: ffffffff8a72f117 RDI: 0000000000000005 RBP: ffffc90003a9f3d0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802f1e0a00 R13: 000000000000000a R14: dffffc0000000000 R15: ffff88807e23a088 sctp_transport_route+0x131/0x350 net/sctp/transport.c:455 sctp_assoc_add_peer+0x743/0x1530 net/sctp/associola.c:662 sctp_process_param net/sctp/sm_make_chunk.c:2576 [inline] sctp_process_init+0x2744/0x2d60 net/sctp/sm_make_chunk.c:2396 sctp_sf_do_unexpected_init.isra.0+0x96f/0x16e0 net/sctp/sm_statefuns.c:1612 sctp_do_sm+0x182/0x5c90 net/sctp/sm_sideeffect.c:1166 sctp_assoc_bh_rcv+0x392/0x6f0 net/sctp/associola.c:1051 sctp_inq_push+0x1db/0x270 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x169/0x590 net/sctp/input.c:331 sk_backlog_rcv include/net/sock.h:1121 [inline] __release_sock+0x362/0x400 net/core/sock.c:3083 release_sock+0x5a/0x220 net/core/sock.c:3637 sctp_sendmsg+0xf2c/0x1eb0 net/sctp/socket.c:2036 inet_sendmsg+0x11c/0x140 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] __sys_sendto+0x42a/0x4f0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 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: 0033:0x7f7b4a185d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7b4b03c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f7b4a376160 RCX: 00007f7b4a185d29 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000008 RBP: 00007f7b4a201a20 R08: 0000000020000100 R09: 000000000000001c R10: 7ddfdbdfafa51cdd R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7b4a376160 R15: 00007ffc3c765068 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 c1 ea 03 shr $0x3,%rdx 4: 48 89 9d 28 fe ff ff mov %rbx,-0x1d8(%rbp) b: 4a 8d 0c 32 lea (%rdx,%r14,1),%rcx f: 48 89 b5 48 fe ff ff mov %rsi,-0x1b8(%rbp) 16: 48 89 8d 40 fe ff ff mov %rcx,-0x1c0(%rbp) 1d: eb 24 jmp 0x43 1f: e8 99 22 27 f7 call 0xf72722bd 24: 4c 89 e0 mov %r12,%rax * 27: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2b: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) 30: 0f 85 aa 0f 00 00 jne 0xfe0 36: 4d 8b 24 24 mov (%r12),%r12 3a: 4d 39 fc cmp %r15,%r12