syzbot
general protection fault in software_node_register
Status:
premoderation: reported on 2026/08/04 14:45
Reported-by: syzbot+0de93c56a4221e73d22c@syzkaller.appspotmail.com
First crash: 2d18h, last: 2d16h
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: 418 Comm: syz.3.29 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:software_node_register+0x36/0x1f0 drivers/base/swnode.c:951
Code: 53 48 83 ec 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 cd 95 8a fe 4c 89 75 c8 4d 8d 66 08 4c 89 e0 48 c1 e8 03 48 89 45 c0 <80> 3c 18 00 74 08 4c 89 e7 e8 5c 20 d0 fe 4d 8b 34 24 4d 85 f6 4c
RSP: 0018:ffffc9000dcaf790 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90002aaf000 RSI: 0000000000008965 RDI: 0000000000008966
RBP: ffffc9000dcaf7d0 R08: ffff888115de35bf R09: 1ffff11022bbc6b7
R10: dffffc0000000000 R11: ffffed1022bbc6b8 R12: 0000000000000008
R13: ffff888116a7e010 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fae7eaaa6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1604e27dac CR3: 00000001a4a91000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
device_add_software_node+0x1a3/0x300 drivers/base/swnode.c:1039
dwc3_pci_quirks drivers/usb/dwc3/dwc3-pci.c:303 [inline]
dwc3_pci_probe+0x55d/0xa80 drivers/usb/dwc3/dwc3-pci.c:368
local_pci_probe drivers/pci/pci-driver.c:324 [inline]
pci_call_probe drivers/pci/pci-driver.c:392 [inline]
__pci_device_probe drivers/pci/pci-driver.c:417 [inline]
pci_device_probe+0x278/0x440 drivers/pci/pci-driver.c:460
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2d7/0x9a0 drivers/base/dd.c:639
__driver_probe_device+0x193/0x270 drivers/base/dd.c:808
device_driver_attach+0xd7/0x1d0 drivers/base/dd.c:1135
bind_store+0x349/0x380 drivers/base/bus.c:216
drv_attr_store+0x88/0xb0 drivers/base/bus.c:77
sysfs_kf_write+0x137/0x150 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x307/0x470 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2282 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x5ef/0xd00 fs/read_write.c:584
ksys_write+0x14a/0x260 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fae7db9e019
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:00007fae7eaaa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fae7de26090 RCX: 00007fae7db9e019
RDX: 000000000000000d RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fae7dc3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fae7de26128 R14: 00007fae7de26090 R15: 00007fffbbe02408
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:software_node_register+0x36/0x1f0 drivers/base/swnode.c:951
Code: 53 48 83 ec 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 cd 95 8a fe 4c 89 75 c8 4d 8d 66 08 4c 89 e0 48 c1 e8 03 48 89 45 c0 <80> 3c 18 00 74 08 4c 89 e7 e8 5c 20 d0 fe 4d 8b 34 24 4d 85 f6 4c
RSP: 0018:ffffc9000dcaf790 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90002aaf000 RSI: 0000000000008965 RDI: 0000000000008966
RBP: ffffc9000dcaf7d0 R08: ffff888115de35bf R09: 1ffff11022bbc6b7
R10: dffffc0000000000 R11: ffffed1022bbc6b8 R12: 0000000000000008
R13: ffff888116a7e010 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fae7eaaa6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c30d817 CR3: 00000001a4a91000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 53 push %rbx
1: 48 83 ec 18 sub $0x18,%rsp
5: 49 89 fe mov %rdi,%r14
8: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
f: fc ff df
12: e8 cd 95 8a fe call 0xfe8a95e4
17: 4c 89 75 c8 mov %r14,-0x38(%rbp)
1b: 4d 8d 66 08 lea 0x8(%r14),%r12
1f: 4c 89 e0 mov %r12,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 48 89 45 c0 mov %rax,-0x40(%rbp)
* 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 e7 mov %r12,%rdi
33: e8 5c 20 d0 fe call 0xfed02094
38: 4d 8b 34 24 mov (%r12),%r14
3c: 4d 85 f6 test %r14,%r14
3f: 4c rex.WR
* Struck through repros no longer work on HEAD.