syzbot
WARNING in __alloc_skb
Status:
premoderation: reported C repro on 2025/08/22 06:38
Bug presence:
origin:upstream
[Documentation on labels]
Reported-by: syzbot+5f8f10540e29be7399f0@syzkaller.appspotmail.com
First crash: 416d, last: 15d
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Last patch testing requests (6)
Sample crash report:
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WARNING: CPU: 0 PID: 17 at mm/page_alloc.c:5286 __alloc_pages_noprof+0x109/0x7e0 mm/page_alloc.c:5286
Modules linked in:
CPU: 0 UID: 0 PID: 17 Comm: ksoftirqd/0 Not tainted syzkaller #0 f6ed0fb9bb938319f6518c785cf37c2d863a58c7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__alloc_pages_noprof+0x109/0x7e0 mm/page_alloc.c:5286
Code: 00 0f 1f 44 00 00 83 fb 0b 72 28 b8 00 20 00 00 23 44 24 40 75 1d 80 3d f5 d6 0b 06 00 0f 85 c2 00 00 00 c6 05 e8 d6 0b 06 01 <0f> 0b 31 c0 e9 b4 00 00 00 83 fb 0a 0f 87 a9 00 00 00 44 8b 64 24
RSP: 0018:ffffc90000117800 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000014 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900001178b8
RBP: ffffc90000117930 R08: ffffc900001178b7 R09: 0000000000000000
R10: ffffc900001178a0 R11: fffff52000022f17 R12: ffffc90000117840
R13: dffffc0000000000 R14: 1ffff92000022f04 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe93f28f90 CR3: 000000011e302000 CR4: 00000000003526b0
Call Trace:
<TASK>
___kmalloc_large_node+0x81/0x220 mm/slub.c:-1
__kmalloc_large_node_noprof+0x1e/0xd0 mm/slub.c:4367
__do_kmalloc_node mm/slub.c:4383 [inline]
__kmalloc_node_track_caller_noprof+0x30d/0x4f0 mm/slub.c:4414
kmalloc_reserve+0x376/0x4f0 net/core/skbuff.c:626
__alloc_skb+0x13f/0x360 net/core/skbuff.c:687
__netdev_alloc_skb+0x10b/0x430 net/core/skbuff.c:751
rx_submit+0x10d/0x8b0 drivers/net/usb/usbnet.c:-1
rx_alloc_submit+0xaa/0x140 drivers/net/usb/usbnet.c:1533
usbnet_bh+0x780/0x9b0 drivers/net/usb/usbnet.c:1602
usbnet_bh_tasklet+0x20/0x30 drivers/net/usb/usbnet.c:1620
tasklet_action_common+0x232/0x620 kernel/softirq.c:856
tasklet_action+0x28/0x30 kernel/softirq.c:882
handle_softirqs+0x1aa/0x620 kernel/softirq.c:621
run_ksoftirqd+0x20/0x30 kernel/softirq.c:999
smpboot_thread_fn+0x486/0x8b0 kernel/smpboot.c:164
kthread+0x2c4/0x360 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
---[ end trace 0000000000000000 ]---
* Struck through repros no longer work on HEAD.