Oops: general protection fault, probably for non-canonical address 0xdffffc00000001d5: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000ea8-0x0000000000000eaf]
CPU: 1 UID: 0 PID: 6673 Comm: syz.0.204 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:lec_atm_close+0x60/0x9e0 net/atm/lec.c:492
Code: 74 08 4c 89 f7 e8 30 32 56 f7 49 8b 06 48 89 44 24 10 48 8d b8 a8 0e 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 f5 32 56 f7 48 8b 5c 24 10 48 c7 83 a8 0e 00
RSP: 0018:ffffc90010117c28 EFLAGS: 00010202
RAX: 00000000000001d5 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000ea8
RBP: ffff8880573c4698 R08: ffff888055d9157f R09: 1ffff1100abb22af
R10: dffffc0000000000 R11: ffffffff8ad9b0c0 R12: ffffffff8ad9b0c0
R13: 1ffff1100abb22b3 R14: ffff888055d91650 R15: ffff888055d91598
FS: 00005555597c6500(0000) GS:ffff888125561000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30b22ff8 CR3: 0000000076908000 CR4: 00000000003526f0
Call Trace:
<TASK>
vcc_destroy_socket net/atm/common.c:181 [inline]
vcc_release+0x10f/0x580 net/atm/common.c:205
svc_release+0x6c/0xd0 net/atm/svc.c:95
__sock_release net/socket.c:656 [inline]
sock_close+0xc3/0x240 net/socket.c:1448
__fput+0x44f/0xa70 fs/file_table.c:469
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe00099c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdf9827468 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fe000c17da0 RCX: 00007fe00099c799
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe000c17da0 R08: 00007fe000c16218 R09: 0000000000000000
R10: 00000000003fe888 R11: 0000000000000246 R12: 000000000001d068
R13: 00007fe000c1618c R14: 000000000001cfe6 R15: 00007ffdf9827570
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lec_atm_close+0x60/0x9e0 net/atm/lec.c:492
Code: 74 08 4c 89 f7 e8 30 32 56 f7 49 8b 06 48 89 44 24 10 48 8d b8 a8 0e 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 f5 32 56 f7 48 8b 5c 24 10 48 c7 83 a8 0e 00
RSP: 0018:ffffc90010117c28 EFLAGS: 00010202
RAX: 00000000000001d5 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000ea8
RBP: ffff8880573c4698 R08: ffff888055d9157f R09: 1ffff1100abb22af
R10: dffffc0000000000 R11: ffffffff8ad9b0c0 R12: ffffffff8ad9b0c0
R13: 1ffff1100abb22b3 R14: ffff888055d91650 R15: ffff888055d91598
FS: 00005555597c6500(0000) GS:ffff888125461000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcdbc1e92f8 CR3: 0000000076908000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 74 08 je 0xa
2: 4c 89 f7 mov %r14,%rdi
5: e8 30 32 56 f7 call 0xf756323a
a: 49 8b 06 mov (%r14),%rax
d: 48 89 44 24 10 mov %rax,0x10(%rsp)
12: 48 8d b8 a8 0e 00 00 lea 0xea8(%rax),%rdi
19: 48 89 f8 mov %rdi,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 05 je 0x35
30: e8 f5 32 56 f7 call 0xf756332a
35: 48 8b 5c 24 10 mov 0x10(%rsp),%rbx
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 83 .byte 0x83
3d: a8 0e test $0xe,%al