Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Mem abort info:
ESR = 0x0000000096000006
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
Data abort info:
ISV = 0, ISS = 0x00000006
CM = 0, WnR = 0
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 18236 Comm: syz-executor346 Not tainted 6.1.69-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ccid_hc_tx_send_packet net/dccp/ccid.h:166 [inline]
pc : dccp_write_xmit+0x6c/0x208 net/dccp/output.c:356
lr : dccp_write_xmit+0x30/0x208 net/dccp/output.c:355
sp : ffff8000250f74c0
x29: ffff8000250f74c0
x28: ffff700004a1eeac
x27: 00000000000f0000
x26: 1fffe0001b04eca6
x25: dfff800000000000
x24: 0000000000000000
x23: 0000000000000000 x22: ffff0000d3088dc0 x21: ffff800017fdf490
x20: ffff0000d8276530 x19: ffff0000d8275c40 x18: ffff8000250f7160
x17: ffff8000188a7000 x16: ffff8000084fa434 x15: ffff80001838cf80
x14: 0000000075644433
x13: dfff800000000000
x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000000 x9 : 1fffe0001b04ebd9
x8 : 0000000000000000
x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800018a21c28
x4 : 0000000000000008 x3 : 0000000000000000
x2 : 0000000000000006
x1 : 0000000000000000
x0 : ffff0000d3088dc0
Call trace:
ccid_hc_tx_send_packet net/dccp/ccid.h:166 [inline]
dccp_write_xmit+0x6c/0x208 net/dccp/output.c:356
dccp_sendmsg+0x634/0xb80 net/dccp/proto.c:798
inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:836
sock_sendmsg_nosec net/socket.c:716 [inline]
__sock_sendmsg net/socket.c:728 [inline]
____sys_sendmsg+0x558/0x844 net/socket.c:2499
___sys_sendmsg net/socket.c:2553 [inline]
__sys_sendmmsg+0x318/0x7d8 net/socket.c:2639
__do_sys_sendmmsg net/socket.c:2668 [inline]
__se_sys_sendmmsg net/socket.c:2665 [inline]
__arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2665
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa1403e0 97a22f85 f9400297 d343fee8 (38796908)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: aa1403e0 mov x0, x20
4: 97a22f85 bl 0xfffffffffe88be18
8: f9400297 ldr x23, [x20]
c: d343fee8 lsr x8, x23, #3
* 10: 38796908 ldrb w8, [x8, x25] <-- trapping instruction