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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-15 20:13:36 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-15 20:13:36 +0300
commite8746440bf68212f19688f1454dad593c74abee1 (patch)
tree6e49e8c5391708266b39be720f0b2128bdc5ad34 /Documentation
parentfe76fc6aaf538df27708ffa3e5d549a6c8e16142 (diff)
parent2f960bd0564081ff85d2eea54890b0d2356934f8 (diff)
downloadlinux-e8746440bf68212f19688f1454dad593c74abee1.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller: 1) Fix regression in multi-SKB responses to RTM_GETADDR, from Arthur Gautier. 2) Fix ipv6 frag parsing in openvswitch, from Yi-Hung Wei. 3) Unbounded recursion in ipv4 and ipv6 GUE tunnels, from Stefano Brivio. 4) Use after free in hns driver, from Yonglong Liu. 5) icmp6_send() needs to handle the case of NULL skb, from Eric Dumazet. 6) Missing rcu read lock in __inet6_bind() when operating on mapped addresses, from David Ahern. 7) Memory leak in tipc-nl_compat_publ_dump(), from Gustavo A. R. Silva. 8) Fix PHY vs r8169 module loading ordering issues, from Heiner Kallweit. 9) Fix bridge vlan memory leak, from Ido Schimmel. 10) Dev refcount leak in AF_PACKET, from Jason Gunthorpe. 11) Infoleak in ipv6_local_error(), flow label isn't completely initialized. From Eric Dumazet. 12) Handle mv88e6390 errata, from Andrew Lunn. 13) Making vhost/vsock CID hashing consistent, from Zha Bin. 14) Fix lack of UMH cleanup when it unexpectedly exits, from Taehee Yoo. 15) Bridge forwarding must clear skb->tstamp, from Paolo Abeni. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits) bnxt_en: Fix context memory allocation. bnxt_en: Fix ring checking logic on 57500 chips. mISDN: hfcsusb: Use struct_size() in kzalloc() net: clear skb->tstamp in bridge forwarding path net: bpfilter: disallow to remove bpfilter module while being used net: bpfilter: restart bpfilter_umh when error occurred net: bpfilter: use cleanup callback to release umh_info umh: add exit routine for UMH process isdn: i4l: isdn_tty: Fix some concurrency double-free bugs vhost/vsock: fix vhost vsock cid hashing inconsistent net: stmmac: Prevent RX starvation in stmmac_napi_poll() net: stmmac: Fix the logic of checking if RX Watchdog must be enabled net: stmmac: Check if CBS is supported before configuring net: stmmac: dwxgmac2: Only clear interrupts that are active net: stmmac: Fix PCI module removal leak tools/bpf: fix bpftool map dump with bitfields tools/bpf: test btf bitfield with >=256 struct member offset bpf: fix bpffs bitfield pretty print net: ethernet: mediatek: fix warning in phy_start_aneg tcp: change txhash on SYN-data timeout ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/bpf/bpf_design_QA.rst11
1 files changed, 5 insertions, 6 deletions
diff --git a/Documentation/bpf/bpf_design_QA.rst b/Documentation/bpf/bpf_design_QA.rst
index 6780a6d81745..7cc9e368c1e9 100644
--- a/Documentation/bpf/bpf_design_QA.rst
+++ b/Documentation/bpf/bpf_design_QA.rst
@@ -157,12 +157,11 @@ Q: Does BPF have a stable ABI?
------------------------------
A: YES. BPF instructions, arguments to BPF programs, set of helper
functions and their arguments, recognized return codes are all part
-of ABI. However when tracing programs are using bpf_probe_read() helper
-to walk kernel internal datastructures and compile with kernel
-internal headers these accesses can and will break with newer
-kernels. The union bpf_attr -> kern_version is checked at load time
-to prevent accidentally loading kprobe-based bpf programs written
-for a different kernel. Networking programs don't do kern_version check.
+of ABI. However there is one specific exception to tracing programs
+which are using helpers like bpf_probe_read() to walk kernel internal
+data structures and compile with kernel internal headers. Both of these
+kernel internals are subject to change and can break with newer kernels
+such that the program needs to be adapted accordingly.
Q: How much stack space a BPF program uses?
-------------------------------------------