syzbot
general protection fault in wcove_typec_probe
Status:
upstream: reported C repro on 2026/09/22 15:34
Bug presence:
origin:upstream
[Documentation on labels]
Reported-by: syzbot+384d9a7044e518075bce@syzkaller.appspotmail.com
First crash: 22d, last: 19d
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Bug presence (1)
| Date |
Name |
Commit |
Repro |
Result |
| 2026/10/09 |
upstream (ToT) |
6c377d19d4a5 |
C
|
[report] general protection fault in wcove_typec_probe
|
Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 5929 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:wcove_typec_probe+0xd5/0x570 drivers/usb/typec/tcpm/wcove.c:621
Code: 27 00 74 13 49 8d be 90 00 00 00 e8 75 19 ff fa 49 8d 86 90 00 00 00 48 89 6c 24 18 48 89 28 49 83 c5 08 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 ac 18 ff fa 49 8b 6d 00 4d 8d ae
RSP: 0018:ffffc90004427af8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888019a9c000 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff888027626488
RBP: ffff888019a9c010 R08: ffff8880276264a7 R09: 0000000000000000
R10: ffff888027626498 R11: ffffed1004ec4c95 R12: dffffc0000000000
R13: 0000000000000008 R14: ffff888027626428 R15: 1ffff11004ec4c97
FS: 000055558b161500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f169b670050 CR3: 0000000075ad4000 CR4: 00000000003506e0
Call Trace:
<TASK>
platform_probe+0x13b/0x1c0 drivers/base/platform.c:1376
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x247/0xae0 drivers/base/dd.c:717
__driver_probe_device+0x1f5/0x390 drivers/base/dd.c:879
device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1206
bind_store+0x1cc/0x210 drivers/base/bus.c:267
kernfs_fop_write_iter+0x3a4/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x474/0x9a0 fs/read_write.c:584
ksys_write+0x151/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f169b79e159
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:00007ffc5333d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f169ba25fa0 RCX: 00007f169b79e159
RDX: 0000000000000007 RSI: 0000200000000380 RDI: 0000000000000006
RBP: 00007f169b83506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f169ba25fac R14: 00007f169ba25fa0 R15: 00007f169ba25fa0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:wcove_typec_probe+0xd5/0x570 drivers/usb/typec/tcpm/wcove.c:621
Code: 27 00 74 13 49 8d be 90 00 00 00 e8 75 19 ff fa 49 8d 86 90 00 00 00 48 89 6c 24 18 48 89 28 49 83 c5 08 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 ac 18 ff fa 49 8b 6d 00 4d 8d ae
RSP: 0018:ffffc90004427af8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888019a9c000 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff888027626488
RBP: ffff888019a9c010 R08: ffff8880276264a7 R09: 0000000000000000
R10: ffff888027626498 R11: ffffed1004ec4c95 R12: dffffc0000000000
R13: 0000000000000008 R14: ffff888027626428 R15: 1ffff11004ec4c97
FS: 000055558b161500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f169b670050 CR3: 0000000075ad4000 CR4: 00000000003506e0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 74 13 49 add %dh,0x49(%rbx,%rdx,1)
4: 8d be 90 00 00 00 lea 0x90(%rsi),%edi
a: e8 75 19 ff fa call 0xfaff1984
f: 49 8d 86 90 00 00 00 lea 0x90(%r14),%rax
16: 48 89 6c 24 18 mov %rbp,0x18(%rsp)
1b: 48 89 28 mov %rbp,(%rax)
1e: 49 83 c5 08 add $0x8,%r13
22: 4c 89 e8 mov %r13,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ef mov %r13,%rdi
33: e8 ac 18 ff fa call 0xfaff18e4
38: 49 8b 6d 00 mov 0x0(%r13),%rbp
3c: 4d rex.WRB
3d: 8d .byte 0x8d
3e: ae scas %es:(%rdi),%al
* Struck through repros no longer work on HEAD.