- 25 Jul, 2020 14 commits
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Tom Parkin authored
l2tp_session_free called BUG_ON if the tunnel magic feather value wasn't correct. The intent of this was to catch lifetime bugs; for example early tunnel free due to incorrect use of reference counts. Since the tunnel magic feather being wrong indicates either early free or structure corruption, we can avoid doing more damage by simply leaving the tunnel structure alone. If the tunnel refcount isn't dropped when it should be, the tunnel instance will remain in the kernel, resulting in the tunnel structure and socket leaking. Signed-off-by:
Tom Parkin <tparkin@katalix.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tom Parkin authored
l2tp_session_free is only called by l2tp_session_dec_refcount when the reference count reaches zero, so it's of limited value to validate the reference count value in l2tp_session_free itself. Signed-off-by:
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Tom Parkin authored
l2tp_session_queue_purge is used during session shutdown to drop any skbs queued for reordering purposes according to L2TP dataplane rules. The BUG_ON in this function checks the session magic feather in an attempt to catch lifetime bugs. Rather than crashing the kernel with a BUG_ON, we can simply WARN_ON and refuse to do anything more -- in the worst case this could result in a leak. However this is highly unlikely given that the session purge only occurs from codepaths which have obtained the session by means of a lookup via. the parent tunnel and which check the session "dead" flag to protect against shutdown races. While we're here, have l2tp_session_queue_purge return void rather than an integer, since neither of the callsites checked the return value. Signed-off-by:
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Tom Parkin authored
checkpatch advises that WARN_ON and recovery code are preferred over BUG_ON which crashes the kernel. l2tp_ppp has a BUG_ON check of struct seq_file's private pointer in pppol2tp_seq_start prior to accessing data through that pointer. Rather than crashing, we can simply bail out early and return NULL in order to terminate the seq file processing in much the same way as we do when reaching the end of tunnel/session instances to render. Retain a WARN_ON to help trace possible bugs in this area. Signed-off-by:
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Tom Parkin authored
checkpatch advises that WARN_ON and recovery code are preferred over BUG_ON which crashes the kernel. l2tp_ppp.c's BUG_ON checks of the l2tp session structure's "magic" field occur in code paths where it's reasonably easy to recover: * In the case of pppol2tp_sock_to_session, we can return NULL and the caller will bail out appropriately. There is no change required to any of the callsites of this function since they already handle pppol2tp_sock_to_session returning NULL. * In the case of pppol2tp_session_destruct we can just avoid decrementing the reference count on the suspect session structure. In the worst case scenario this results in a memory leak, which is preferable to a crash. Convert these uses of BUG_ON to WARN_ON accordingly. Signed-off-by:
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Tom Parkin authored
l2tp_tunnel_closeall is only called from l2tp_core.c, and it's easy to statically analyse the code path calling it to validate that it should never be passed a NULL tunnel pointer. Having a BUG_ON checking the tunnel pointer triggers a checkpatch warning. Since the BUG_ON is of no value, remove it to avoid the warning. Signed-off-by:
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Tom Parkin authored
l2tp_session_queue_purge is only called from l2tp_core.c, and it's easy to statically analyse the code paths calling it to validate that it should never be passed a NULL session pointer. Having a BUG_ON checking the session pointer triggers a checkpatch warning. Since the BUG_ON is of no value, remove it to avoid the warning. Signed-off-by:
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Tom Parkin authored
l2tp_dfs_seq_start had a BUG_ON to catch a possible programming error in l2tp_dfs_seq_open. Since we can easily bail out of l2tp_dfs_seq_start, prefer to do that and flag the error with a WARN_ON rather than crashing the kernel. Signed-off-by:
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Tom Parkin authored
checkpatch warns about multiple assignments. Update l2tp accordingly. Signed-off-by:
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David S. Miller authored
Willem de Bruijn says: ==================== icmp6: support rfc 4884 Extend the feature merged earlier this week for IPv4 to IPv6. I expected this to be a single patch, but patch 1 seemed better to be stand-alone patch 1: small fix in length calculation patch 2: factor out ipv4-specific patch 3: add ipv6 changes v1->v2: add missing static keyword in patch 3 ==================== Signed-off-by: -
Willem de Bruijn authored
Extend the rfc 4884 read interface introduced for ipv4 in commit eba75c58 ("icmp: support rfc 4884") to ipv6. Add socket option SOL_IPV6/IPV6_RECVERR_RFC4884. Changes v1->v2: - make ipv6_icmp_error_rfc4884 static (file scope) Signed-off-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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Willem de Bruijn authored
The RFC 4884 spec is largely the same between IPv4 and IPv6. Factor out the IPv4 specific parts in preparation for IPv6 support: - icmp types supported - icmp header size, and thus offset to original datagram start - datagram length field offset in icmp(6)hdr. - datagram length field word size: 4B for IPv4, 8B for IPv6. Signed-off-by:
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Willem de Bruijn authored
1) Only accept packets with original datagram len field >= header len. The extension header must start after the original datagram headers. The embedded datagram len field is compared against the 128B minimum stipulated by RFC 4884. It is unlikely that headers extend beyond this. But as we know the exact header length, check explicitly. 2) Remove the check that datagram length must be <= 576B. This is a send constraint. There is no value in testing this on rx. Within private networks it may be known safe to send larger packets. Process these packets. This test was also too lax. It compared original datagram length rather than entire icmp packet length. The stand-alone fix would be: - if (hlen + skb->len > 576) + if (-skb_network_offset(skb) + skb->len > 576) Fixes: eba75c58 ("icmp: support rfc 4884") Signed-off-by:
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Colin Ian King authored
The variable status is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Also put the variable declarations into reverse christmas tree order. Addresses-Coverity: ("Unused value") Signed-off-by:Colin Ian King <colin.king@canonical.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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- 24 Jul, 2020 26 commits
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Eelco Chaudron authored
The previous patch introduced a deadlock, this patch fixes it by making sure the work is canceled without holding the global ovs lock. This is done by moving the reorder processing one layer up to the netns level. Fixes: eac87c41 ("net: openvswitch: reorder masks array based on usage") Reported-by: syzbot+2c4ff3614695f75ce26c@syzkaller.appspotmail.com Reported-by: syzbot+bad6507e5db05017b008@syzkaller.appspotmail.com Reviewed-by:
Paolo <pabeni@redhat.com> Signed-off-by:
Eelco Chaudron <echaudro@redhat.com> Signed-off-by:
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Christoph Hellwig authored
This sockopt accepts two kinds of parameters, using struct sctp_sack_info and struct sctp_assoc_value. The mentioned commit didn't notice an implicit cast from the smaller (latter) struct to the bigger one (former) when copying the data from the user space, which now leads to an attempt to write beyond the buffer (because it assumes the storing buffer is bigger than the parameter itself). Fix it by allocating a sctp_sack_info on stack and filling it out based on the small struct for the compat case. Changelog stole from an earlier patch from Marcelo Ricardo Leitner. Fixes: ebb25def ("sctp: pass a kernel pointer to sctp_setsockopt_delayed_ack") Reported-by: syzbot+0e4699d000d8b874d8dc@syzkaller.appspotmail.com Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Tony Nguyen says: ==================== 100GbE Intel Wired LAN Driver Updates 2020-07-23 This series contains updates to ice driver only. Jake refactors ice_discover_caps() to reduce the number of AdminQ calls made. Splits ice_parse_caps() to separate functions to update function and device capabilities separately to allow for updating outside of initialization. Akeem adds power management support. Paul G refactors FC and FEC code to aid in restoring of PHY settings on media insertion. Implements lenient mode and link override support. Adds link debug info and formats existing debug info to be more readable. Adds support to check and report additional autoneg capabilities. Implements the capability to detect media cage in order to differentiate AUI types as Direct Attach or backplane. Bruce implements Total Port Shutdown for devices that support it. Lev renames low_power_ctrl field to lower_power_ctrl_an to be more descriptive of the field. Doug reports AOC types as media type fiber. Paul S adds code to handle 1G SGMII PHY type. ==================== Signed-off-by: -
David S. Miller authored
drivers/isdn/mISDN/socket.c: In function ‘data_sock_setsockopt’: ./include/linux/kern_levels.h:5:18: warning: format ‘%p’ expects argument of type ‘void *’, but argument 6 has type ‘sockptr_t’ [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ ./include/linux/kern_levels.h:15:20: note: in expansion of macro ‘KERN_SOH’ 15 | #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */ | ^~~~~~~~ drivers/isdn/mISDN/socket.c:410:10: note: in expansion of macro ‘KERN_DEBUG’ 410 | printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, | ^~~~~~~~~~ drivers/isdn/mISDN/socket.c:410:38: note: format string is defined here 410 | printk(KERN_DEBUG "%s(%p, %d, %x, %p, %d)\n", __func__, sock, | ~^ | | | void * Signed-off-by: -
David S. Miller authored
Christoph Hellwig says: ==================== get rid of the address_space override in setsockopt v2 setsockopt is the last place in architecture-independ code that still uses set_fs to force the uaccess routines to operate on kernel pointers. This series adds a new sockptr_t type that can contained either a kernel or user pointer, and which has accessors that do the right thing, and then uses it for setsockopt, starting by refactoring some low-level helpers and moving them over to it before finally doing the main setsockopt method. Note that apparently the eBPF selftests do not even cover this path, so the series has been tested with a testing patch that always copies the data first and passes a kernel pointer. This is something that works for most common sockopts (and is something that the ePBF support relies on), but unfortunately in various corner cases we either don't use the passed in length, or in one case actually copy data back from setsockopt, or in case of bpfilter straight out do not work with kernel pointers at all. Against net-next/master. Changes since v1: - check that users don't pass in kernel addresses - more bpfilter cleanups - cosmetic mptcp tweak ==================== Signed-off-by: -
Christoph Hellwig authored
For architectures like x86 and arm64 we don't need the separate bit to indicate that a pointer is a kernel pointer as the address spaces are unified. That way the sockptr_t can be reduced to a union of two pointers, which leads to nicer calling conventions. The only caveat is that we need to check that users don't pass in kernel address and thus gain access to kernel memory. Thus the USER_SOCKPTR helper is replaced with a init_user_sockptr function that does this check and returns an error if it fails. Signed-off-by:
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Christoph Hellwig authored
Rework the remaining setsockopt code to pass a sockptr_t instead of a plain user pointer. This removes the last remaining set_fs(KERNEL_DS) outside of architecture specific code. Signed-off-by:
Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Factour out a helper to set the IPv6 option headers from do_ipv6_setsockopt. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Note that the get case is pretty weird in that it actually copies data back to userspace from setsockopt. Signed-off-by:
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Christoph Hellwig authored
Split ipv6_flowlabel_opt into a subfunction for each action and a small wrapper. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Use the sockptr_t type to merge the versions. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
This is mostly to prepare for cleaning up the callers, as bpfilter by design can't handle kernel pointers. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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Christoph Hellwig authored
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by:
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