Jason Baron 3bc813c5e6 net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS ... [ Upstream commit ca9f9cdc4de97d0221100b11224738416696163c ] Currently, alloc_skb_with_frags() will only fill (MAX_SKB_FRAGS - 1) slots. I think it should use all MAX_SKB_FRAGS slots, as callers of alloc_skb_with_frags() will size their allocation of frags based on MAX_SKB_FRAGS. This issue was discovered via a test patch that sets 'order' to 0 in alloc_skb_with_frags(), which effectively tests/simulates high fragmentation. In this case sendmsg() on unix sockets will fail every time for large allocations. If the PAGE_SIZE is 4K, then data_len will request 68K or 17 pages, but alloc_skb_with_frags() can only allocate 64K in this case or 16 pages. Fixes: 09c2c90705 ("net: allow alloc_skb_with_frags() to allocate bigger packets") Signed-off-by: Jason Baron <jbaron@akamai.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20250922191957.2855612-1-jbaron@akamai.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-10-02 13:44:10 +02:00
..
bpf_sk_storage.c	netlink: introduce type-checking attribute iteration	2024-03-29 15:06:02 -07:00
datagram.c	net: add support for skbs with unreadable frags	2024-09-11 20:44:31 -07:00
dev_addr_lists_test.c	net: dev_addr_lists: move locking out of init/exit in kunit	2024-04-15 10:26:35 +01:00
dev_addr_lists.c	net: Correct spelling in net/core	2024-08-26 09:37:23 -07:00
dev_ioctl.c	netdevice: convert private flags > BIT(31) to bitfields	2024-09-03 11:36:43 +02:00
dev.c	net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM	2025-08-28 16:31:14 +02:00
dev.h	net: page_pool: avoid false positive warning if NAPI was never added	2025-05-29 11:02:59 +02:00
devmem.c	net: devmem: do not WARN conditionally after netdev_rx_queue_restart()	2025-04-10 14:39:31 +02:00
devmem.h	tcp: RX path for devmem TCP	2024-09-11 20:44:32 -07:00
drop_monitor.c	drop_monitor: fix incorrect initialization order	2025-02-27 04:30:21 -08:00
dst_cache.c	net: dst_cache: add two DEBUG_NET warnings	2024-06-03 18:50:09 -07:00
dst.c	net: dst: annotate data-races around dst->output	2025-08-15 12:13:41 +02:00
failover.c
fib_notifier.c
fib_rules.c	net: fib_rules: annotate data-races around rule->[io]ifindex	2025-02-21 14:01:16 +01:00
filter.c	bpf: Check flow_dissector ctx accesses are aligned	2025-08-15 12:13:58 +02:00
flow_dissector.c	flow_dissector: Fix port range key handling in BPF conversion	2025-02-27 04:30:18 -08:00
flow_offload.c
gen_estimator.c	net_sched: gen_estimator: fix est_timer() vs CONFIG_PREEMPT_RT=y	2025-09-09 18:58:07 +02:00
gen_stats.c
gro_cells.c	net: move netdev_max_backlog to net_hotdata	2024-03-07 21:12:42 -08:00
gro.c	net: Clear old fragment checksum value in napi_reuse_skb	2025-03-07 18:25:33 +01:00
gso.c	net: introduce struct net_hotdata	2024-03-07 21:12:41 -08:00
hotdata.c	net: move sysctl_mem_pcpu_rsv to net_hotdata	2024-04-30 18:46:52 -07:00
hwbm.c
ieee8021q_helpers.c	net: ieee8021q: fix insufficient table-size assertion	2025-08-20 18:30:34 +02:00
link_watch.c	ipvlan: Fix use-after-free in ipvlan_get_iflink().	2025-01-17 13:40:39 +01:00
lwt_bpf.c	bpf: lwtunnel: Unmask upper DSCP bits in bpf_lwt_xmit_reroute()	2024-09-09 14:14:52 +01:00
lwtunnel.c	net: lwtunnel: disable BHs when required	2025-05-02 07:59:01 +02:00
Makefile	netdev: support binding dma-buf to netdevice	2024-09-11 20:44:31 -07:00
mp_dmabuf_devmem.h	memory-provider: dmabuf devmem memory provider	2024-09-11 20:44:31 -07:00
neighbour.c	neighbour: add support for NUD_PERMANENT proxy entries	2025-08-20 18:30:37 +02:00
net_namespace.c	net: Add net_passive_inc() and net_passive_dec().	2025-08-20 18:30:56 +02:00
net_test.c	pfcp: always set pfcp metadata	2024-04-01 10:49:28 +01:00
net-procfs.c	net: make softnet_data.dropped an atomic_t	2024-04-01 11:28:32 +01:00
net-sysfs.c	net: sysfs: Fix weird usage of class's namespace relevant fields	2024-09-09 10:30:52 +01:00
net-sysfs.h
net-traces.c	move asm/unaligned.h to linux/unaligned.h	2024-10-02 17:23:23 -04:00
netclassid_cgroup.c	cgroup, netclassid: on modifying netclassid in cgroup, only consider the main process.	2023-10-16 16:36:53 -07:00
netdev_rx_queue.c	memory-provider: dmabuf devmem memory provider	2024-09-11 20:44:31 -07:00
netdev-genl-gen.c	netdev: avoid CFI problems with sock priv helpers	2025-01-23 17:22:52 +01:00
netdev-genl-gen.h	netdev: support binding dma-buf to netdevice	2024-09-11 20:44:31 -07:00
netdev-genl.c	net: export a helper for adding up queue stats	2025-05-18 08:24:50 +02:00
netevent.c
netmem_priv.h	page_pool: Track DMA-mapped pages and unmap them when destroying the pool	2025-06-19 15:31:42 +02:00
netpoll.c	netpoll: prevent hanging NAPI when netcons gets enabled	2025-08-15 12:14:04 +02:00
netprio_cgroup.c
of_net.c
page_pool_priv.h	memory-provider: dmabuf devmem memory provider	2024-09-11 20:44:31 -07:00
page_pool_user.c	net: page_pool: don't cast mp param to devmem	2025-04-20 10:15:17 +02:00
page_pool.c	net: page_pool: Don't recycle into cache on PREEMPT_RT	2025-06-27 11:11:30 +01:00
pktgen.c	net: pktgen: fix access outside of user given buffer in pktgen_thread_write()	2025-05-29 11:02:43 +02:00
ptp_classifier.c
request_sock.c	tcp: make sure init the accept_queue's spinlocks once	2024-01-19 21:13:25 -08:00
rtnetlink.c	rtnetlink: Allocate vfinfo size for VF GUIDs when supported	2025-04-10 14:39:26 +02:00
scm.c	tcp: devmem: don't write truncated dmabuf CMSGs to userspace	2025-03-07 18:25:32 +01:00
secure_seq.c
selftests.c	net: selftests: fix TCP packet checksum	2025-07-06 11:01:41 +02:00
skbuff.c	net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS	2025-10-02 13:44:10 +02:00
skmsg.c	bpf, sockmap: Fix psock incorrectly pointing to sk	2025-08-15 12:13:39 +02:00
sock_destructor.h
sock_diag.c	net: use unrcu_pointer() helper	2024-06-06 11:52:52 +02:00
sock_map.c	bpf: Disable non stream socket for strparser	2025-02-27 04:30:19 -08:00
sock_reuseport.c	net: core: annotate socks of struct sock_reuseport with __counted_by	2024-08-02 17:16:59 -07:00
sock.c	net: better track kernel sockets lifetime	2025-08-20 18:30:56 +02:00
stream.c	net: Return error from sk_stream_wait_connect() if sk_wait_event() fails	2023-12-15 10:48:51 +00:00
sysctl_net_core.c	net: set the minimum for net_hotdata.netdev_budget_usecs	2025-03-07 18:25:29 +01:00
timestamping.c	net: Change the API of PHY default timestamp to MAC	2024-07-15 08:02:26 -07:00
tso.c	move asm/unaligned.h to linux/unaligned.h	2024-10-02 17:23:23 -04:00
utils.c	net: Fix checksum update for ILA adj-transport	2025-06-27 11:11:40 +01:00
xdp.c	page_pool: Move pp_magic check into helper functions	2025-06-19 15:31:42 +02:00