WARNING in vmxnet3_probe_device

Status: upstream: reported on 2026/08/19 01:17
Subsystems: net
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+e39090bc9b3cf457717f@syzkaller.appspotmail.com
First crash: 11d, last: 11d
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
a489ca91 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in vmxnet3_probe_device 2026/08/17 02:04 2026/08/17 02:04 2026/08/17 03:00 746171ee
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [net?] WARNING in vmxnet3_probe_device 0 (1) 2026/08/19 01:17

Sample crash report:
oom_control is deprecated and will be removed. Please report your usecase to linux-mm-@kvack.org if you depend on this functionality.
openvswitch: netlink: IP tunnel dst address not specified
------------[ cut here ]------------
vmxnet3 0000:00:00.0: rejecting DMA map of vmalloc memory
WARNING: ./include/linux/dma-mapping.h:524 at dma_map_single_attrs include/linux/dma-mapping.h:523 [inline], CPU#0: syz.0.0/5315
WARNING: ./include/linux/dma-mapping.h:524 at vmxnet3_probe_device+0xab8/0x2e70 drivers/net/vmxnet3/vmxnet3_drv.c:4047, CPU#0: syz.0.0/5315
Modules linked in:
CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dma_map_single_attrs include/linux/dma-mapping.h:523 [inline]
RIP: 0010:vmxnet3_probe_device+0xb32/0x2e70 drivers/net/vmxnet3/vmxnet3_drv.c:4047
Code: 89 ff e8 d1 9e 02 fb 4d 8b 2f eb 15 e8 f7 68 93 fa 41 bf 04 00 00 00 41 b6 03 eb 7d e8 e7 68 93 fa 48 89 df 4c 89 f6 4c 89 ea <67> 48 0f b9 3a 48 8b 04 24 48 05 88 c4 00 00 49 89 c6 48 c1 e8 03
RSP: 0018:ffffc9000e24f820 EFLAGS: 00010246
RAX: 1ffff11003a4bc1a RBX: ffffffff90657ca0 RCX: dffffc0000000000
RDX: ffff88801fa17240 RSI: ffffffff8f872e20 RDI: ffffffff90657ca0
RBP: ffffc9000e24f9b0 R08: 0000000000000003 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1003a4bcb3 R12: 0000000000000001
R13: ffff88801fa17240 R14: ffffffff8f872e20 R15: ffff88801d25e0d0
FS:  00007fcafb3346c0(0000) GS:ffff88808c53e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcafb33d230 CR3: 000000001c30b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 local_pci_probe drivers/pci/pci-driver.c:332 [inline]
 pci_call_probe drivers/pci/pci-driver.c:394 [inline]
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203
 bind_store+0x1d0/0x220 drivers/base/bus.c:267
 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcafa39e0d9
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:00007fcafb333fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcafa625fa0 RCX: 00007fcafa39e0d9
RDX: 000000000000000c RSI: 0000200000000140 RDI: 000000000000000a
RBP: 00007fcafa435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcafa626038 R14: 00007fcafa625fa0 R15: 00007ffc9d800cc8
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 ff                	mov    %edi,%edi
   2:	e8 d1 9e 02 fb       	call   0xfb029ed8
   7:	4d 8b 2f             	mov    (%r15),%r13
   a:	eb 15                	jmp    0x21
   c:	e8 f7 68 93 fa       	call   0xfa936908
  11:	41 bf 04 00 00 00    	mov    $0x4,%r15d
  17:	41 b6 03             	mov    $0x3,%r14b
  1a:	eb 7d                	jmp    0x99
  1c:	e8 e7 68 93 fa       	call   0xfa936908
  21:	48 89 df             	mov    %rbx,%rdi
  24:	4c 89 f6             	mov    %r14,%rsi
  27:	4c 89 ea             	mov    %r13,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 8b 04 24          	mov    (%rsp),%rax
  33:	48 05 88 c4 00 00    	add    $0xc488,%rax
  39:	49 89 c6             	mov    %rax,%r14
  3c:	48 c1 e8 03          	shr    $0x3,%rax

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/15 01:05 upstream a5161661ae99 746171ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in vmxnet3_probe_device
* Struck through repros no longer work on HEAD.