syzbot

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff81a33573
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
stack pointer	        = 0x28:0xfffffe0056c8a1c0
frame pointer	        = 0x28:0xfffffe0056c8a6f0

code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 2 (clock (0))
rdi: 0000000000000000 rsi: 0000000000000000 rdx: 000000000dcaa960
rcx: fffffe00033eee30  r8: 0000000000000000  r9: 00000000060080fe
rax: fffffe00033eee30 rbx: fffffe006da8c3e0 rbp: fffffe0056c8a6f0
r10: aa03000000000000 r11: 000000000000001f r12: fffffe0056c8a4c0
r13: fffffe0056c8a500 r14: 0000000000000000 r15: fffffe00829b6338
trap number		= 12
panic: page fault
cpuid = 0
time = 1726869687
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056c898f0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056c89a50
vpanic() at vpanic+0x280/frame 0xfffffe0056c89c10
panic() at panic+0xb5/frame 0xfffffe0056c89cd0
trap_fatal() at trap_fatal+0x7f2/frame 0xfffffe0056c89df0
trap_pfault() at trap_pfault+0x179/frame 0xfffffe0056c89f10
trap() at trap+0x648/frame 0xfffffe0056c8a0f0
calltrap() at calltrap+0x8/frame 0xfffffe0056c8a0f0
--- trap 0xc, rip = 0xffffffff81a33573, rsp = 0xfffffe0056c8a1c0, rbp = 0xfffffe0056c8a6f0 ---
ip6_output() at ip6_output+0x30d3/frame 0xfffffe0056c8a6f0
sctp_lowlevel_chunk_output() at sctp_lowlevel_chunk_output+0x216c/frame 0xfffffe0056c8a9a0
sctp_send_initiate() at sctp_send_initiate+0x1591/frame 0xfffffe0056c8ab20
sctp_t1init_timer() at sctp_t1init_timer+0x66/frame 0xfffffe0056c8ab70
sctp_timeout_handler() at sctp_timeout_handler+0xb3b/frame 0xfffffe0056c8acb0
softclock_call_cc() at softclock_call_cc+0x395/frame 0xfffffe0056c8ae80
softclock_thread() at softclock_thread+0x200/frame 0xfffffe0056c8aef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056c8af30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056c8af30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 2 tid 100030 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x23e27f7(%rip)
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0xfffffe00033eee30
rdx                          0
rbx         0xffffffff827230e0  .str.27
rsp         0xfffffe0056c89a30
rbp         0xfffffe0056c89a50
rsi                          0
rdi         0xffffffff815d2979  printf+0x149
r8                           0
r9                  0xffffffff
r10                          0
r11                       0x17
r12         0xfffffe0007a19000
r13         0xfffffffffffffffe
r14         0xffffffff827230e0  .str.27
r15                          0
rip         0xffffffff815bc81e  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x23e27f7(%rip)
db> serialport: VM disconnected.