syzbot
general protection fault in software_node_register
Status:
upstream: reported C repro on 2026/08/16 02:33
Reported-by: syzbot+cd9dbc2be06ae44cfe11@syzkaller.appspotmail.com
First crash: 5d13h, last: 5d13h
Sample crash report:
sd 0:0:1:0: [sda] Synchronizing SCSI cache
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 303 Comm: syz-executor264 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:957
Code: 53 48 83 ec 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 5d 78 a1 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 ac e7 e0 fe 4d 8b 34 24 4d 85 f6 4c
RSP: 0018:ffffc900009b7770 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffff88810b25a780
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900009b77b0 R08: ffff88810aa797bf R09: 1ffff1102154f2f7
R10: dffffc0000000000 R11: ffffed102154f2f8 R12: 0000000000000008
R13: ffff888123ba7010 R14: 0000000000000000 R15: 0000000000000000
FS: 000055556b63d3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cde5ca8148 CR3: 00000001239d8000 CR4: 00000000003506b0
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:1045
dwc3_pci_quirks drivers/usb/dwc3/dwc3-pci.c:263 [inline]
dwc3_pci_probe+0x548/0x920 drivers/usb/dwc3/dwc3-pci.c:328
local_pci_probe drivers/pci/pci-driver.c:323 [inline]
pci_call_probe drivers/pci/pci-driver.c:380 [inline]
__pci_device_probe drivers/pci/pci-driver.c:405 [inline]
pci_device_probe+0x27a/0x440 drivers/pci/pci-driver.c:448
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x27d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x193/0x270 drivers/base/dd.c:755
device_driver_attach+0xd7/0x1d0 drivers/base/dd.c:1076
bind_store+0x33b/0x380 drivers/base/bus.c:216
drv_attr_store+0x79/0xa0 drivers/base/bus.c:77
sysfs_kf_write+0x129/0x150 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x2bd/0x400 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2212 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x831/0xfd0 fs/read_write.c:594
ksys_write+0x14a/0x260 fs/read_write.c:647
__do_sys_write fs/read_write.c:659 [inline]
__se_sys_write fs/read_write.c:656 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:656
x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3e5ce48db9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd6f71c368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffd6f71c498 RCX: 00007f3e5ce48db9
RDX: 000000000000000d RSI: 0000200000000240 RDI: 0000000000000005
RBP: 0000000000000001 R08: 00007ffd6f71c498 R09: 00007ffd6f71c498
R10: 00007ffd6f71c498 R11: 0000000000000246 R12: 00007ffd6f71c488
R13: 0000000000000002 R14: 00007f3e5ced9ca0 R15: 0000000000000002
</TASK>
Modules linked in:
---[ end trace b2736b066461ef72 ]---
RIP: 0010:software_node_register+0x36/0x1f0 drivers/base/swnode.c:957
Code: 53 48 83 ec 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 5d 78 a1 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 ac e7 e0 fe 4d 8b 34 24 4d 85 f6 4c
RSP: 0018:ffffc900009b7770 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffff88810b25a780
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 5d 78 a1 fe call 0xfea17874
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 ac e7 e0 fe call 0xfee0e7e4
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.