Hello:
This patch was applied to netdev/net.git (refs/heads/master):
On Mon, 1 Mar 2021 02:22:40 +0300 you wrote:
> syzbot found WARNING in __alloc_pages_nodemask()[1] when order >= MAX_ORDER.
> It was caused by a huge length value passed from userspace to
> qrtr_tun_write_iter(),
> which tries to allocate skb. Since the value comes from the untrusted source
> there is no need to raise a warning in __alloc_pages_nodemask().
>
> [1] WARNING in __alloc_pages_nodemask+0x5f8/0x730 mm/page_alloc.c:5014
> Call Trace:
> __alloc_pages include/linux/gfp.h:511 [inline]
> __alloc_pages_node include/linux/gfp.h:524 [inline]
> alloc_pages_node include/linux/gfp.h:538 [inline]
> kmalloc_large_node+0x60/0x110 mm/slub.c:3999
> __kmalloc_node_track_caller+0x319/0x3f0 mm/slub.c:4496
> __kmalloc_reserve net/core/skbuff.c:150 [inline]
> __alloc_skb+0x4e4/0x5a0 net/core/skbuff.c:210
> __netdev_alloc_skb+0x70/0x400 net/core/skbuff.c:446
> netdev_alloc_skb include/linux/skbuff.h:2832 [inline]
> qrtr_endpoint_post+0x84/0x11b0 net/qrtr/qrtr.c:442
> qrtr_tun_write_iter+0x11f/0x1a0 net/qrtr/tun.c:98
> call_write_iter include/linux/fs.h:1901 [inline]
> new_sync_write+0x426/0x650 fs/read_write.c:518
> vfs_write+0x791/0xa30 fs/read_write.c:605
> ksys_write+0x12d/0x250 fs/read_write.c:658
> do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> [...]
Here is the summary with links:
- [v4] net/qrtr: fix __netdev_alloc_skb call
https://git.kernel.org/netdev/net/c/093b036aa94e
You are awesome, thank you!
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